Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsData collecting ICsData acquisition IC - AD converter (ADC) External VQFN 32

ADS7950, ADS7951, ADS7952, ADS7953

ADS7954, ADS7955, ADS7956, ADS7957

ADS7958, ADS7959, ADS7960, ADS7961

www.ti.com

SLAS605A –JUNE 2008–REVISED JANUARY 2010

12/10/8-Bit, 1 MSPS, 16/12/8/4-Channel, Single-Ended, MicroPower, Serial Interface ADCs

Check for Samples: ADS7950, ADS7951, ADS7952, ADS7953, ADS7954, ADS7955, ADS7956, ADS7957, ADS7958, ADS7959,

ADS7960, ADS7961

FEATURES

DESCRIPTION

• 1-MHz Sample Rate Serial Devices

The ADS79XX is a 12/10/8-bit multichannel

analog-to-digital converter family. The following table

• Product Family of 12/10/8-Bit Resolution

shows all twelve devices from this product family.

• Zero Latency

The devices include a capacitor based SAR A/D

• 20-MHz Serial Interface

converter with inherent sample and hold.

• Analog Supply Range: 2.7 to 5.25V

The devices accept a wide analog supply range from

• I/O Supply Range: 1.7 to 5.25V

2.7V to 5.25V. Very low power consumption makes

• Two SW Selectable Unipolar, Input Ranges: 0

these devices suitable for battery-powered and

to 2.5V and 0 to 5V

isolated power supply applications.

• Auto and Manual Modes for Channel Selection

A wide 1.7V to 5.25V I/O supply range facilitates a

• 12,8,4-Channel Devices can Share 16 Channel

glue-less interface with the most commonly used

Device Footprint

CMOS digital hosts.

• Two Programmable Alarm Levels per Channel

The serial interface is controlled by CS and SCLK for

• Four Individually Configurable GPIOs for

easy connection with microprocessors and DSP.

TSSOP package devices. One GPIO for QFN

The input signal is sampled with the falling edge of

devices

CS. It uses SCLK for conversion, serial data output,

• Typical Power Dissipation: 14.5 mW (+VA = 5V,

and reading serial data in. The devices allow auto

+VBD = 3V) at 1 MSPS

sequencing of preselected channels or manual

selection of a channel for the next conversion cycle.

• Power-Down Current (1 mA)

• Input Bandwidth (47 MHz at 3dB)

There are two software selectable input ranges (0V -

2.5V and 0V - 5V), four individually configurable

• 38-,30-Pin TSSOP and 32-,24-Pin QFN

GPIOs ( in case of TSSOP package devices), and

Packages

two programmable alarm thresholds per channel.

These features make the devices suitable for most

APPLICATIONS

data acquisition applications.

• PLC / IPC

The devices offer an attractive power-down feature.

• Battery Powered Systems

This is extremely useful for power saving when the

• Medical Instrumentation

device is operated at lower conversion speeds.

• Digital Power Supplies

The 16/12-channel devices from this family are

• Touch Screen Controllers

available in a 38-pin TSSOP and 32 pin QFN

• High-Speed Data Acquisition Systems

package and the 4/8-channel devices are available in

• High-Speed Closed-Loop Systems

a 30-pin TSSOP and 24 pin QFN packages.

MICROPOWER MULTI-CHANNEL ADS79XX FAMILY

RESOLUTION

NUMBER OF

CHANNELS

12 BIT 10 BIT 8 BIT

16 ADS7953 ADS7957 ADS7961

12 ADS7952 ADS7956 ADS7960

8 ADS7951 ADS7955 ADS7959

4 ADS7950 ADS7954 ADS7958

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (64 pages)

PAGE 1
ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 www.ti.com SLAS605A – JUNE 2008 – REVISED JANUARY 2010 12/10/8-Bit, 1 MSPS, 16/12/8/4-Channel, Single-Ended, MicroPower, Serial Interface ADCs Check for Samples: ADS7950, ADS7951, ADS7952, ADS7953, ADS7954, ADS7955, ADS7956, ADS7957, ADS7958, ADS7959, ADS7960, ADS7961 FEATURES DESCRIPTION • • • • • • • The ADS79XX is a 12/10/8-bit multichannel analog-to-digital converter family.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 SLAS605A – JUNE 2008 – REVISED JANUARY 2010 www.ti.com This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 www.ti.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 SLAS605A – JUNE 2008 – REVISED JANUARY 2010 www.ti.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 www.ti.com SLAS605A – JUNE 2008 – REVISED JANUARY 2010 ELECTRICAL CHARACTERISTICS, ADS7950/51/52/53 +VA = 2.7 V to 5.25 V, +VBD = 1.7 V to 5.25 V, Vref = 2.5 V ± 0.1 V, TA = -40°C to 125°C, fsample = 1 MHz (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT ANALOG INPUT Full-scale input span (1) Range 1 0 Vref Range 2 while 2Vref ≤ +VA 0 2*Vref –0.20 VREF +0.20 –0.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 SLAS605A – JUNE 2008 – REVISED JANUARY 2010 www.ti.com ELECTRICAL CHARACTERISTICS, ADS7950/51/52/53 (continued) +VA = 2.7 V to 5.25 V, +VBD = 1.7 V to 5.25 V, Vref = 2.5 V ± 0.1 V, TA = -40°C to 125°C, fsample = 1 MHz (unless otherwise noted) PARAMETER TEST CONDITIONS Vref reference voltage at REFP (6) MIN TYP MAX 2.0 2.5 3.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 www.ti.com SLAS605A – JUNE 2008 – REVISED JANUARY 2010 ELECTRICAL CHARACTERISTICS, ADS7954/55/56/57 (continued) +VA = 2.7 V to 5.25 V, +VBD = 1.7 V to 5.25 V, Vref = 2.5 V ± 0.1 V, TA = -40°C to 125°C, fsample = 1 MHz (unless otherwise noted) MIN TYP MAX UNIT Integral linearity PARAMETER TEST CONDITIONS –0.5 ±0.2 0.5 LSB (2) Differential linearity –0.5 ±0.2 0.5 LSB Offset error (3) –1.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 SLAS605A – JUNE 2008 – REVISED JANUARY 2010 www.ti.com ELECTRICAL CHARACTERISTICS, ADS7954/55/56/57 (continued) +VA = 2.7 V to 5.25 V, +VBD = 1.7 V to 5.25 V, Vref = 2.5 V ± 0.1 V, TA = -40°C to 125°C, fsample = 1 MHz (unless otherwise noted) PARAMETER TEST CONDITIONS MIN Power-down state supply current +VBD supply current TYP MAX 1 +VA = 5.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 www.ti.com SLAS605A – JUNE 2008 – REVISED JANUARY 2010 ELECTRICAL CHARACTERISTICS, ADS7958/59/60/61 (continued) +VA = 2.7 V to 5.25 V, +VBD = 1.7 V to 5.25 V, Vref = 2.5 V ± 0.1 V, TA = -40°C to 125°C, fsample = 1 MHz (unless otherwise noted) PARAMETER Channel-to-channel crosstalk TEST CONDITIONS MIN TYP Any off-channel with 100kHz, Full-scale input to channel being sampled with DC input.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 SLAS605A – JUNE 2008 – REVISED JANUARY 2010 www.ti.com TIMING REQUIREMENTS (see Figure 45, Figure 46, Figure 47, and Figure 48) (continued) All specifications typical at –40°C to 125°C, +VA = 2.7 V to 5.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 www.ti.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 32 AGND SDI SDO BDGND +VBD GPIO +VA REFM www.ti.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 www.ti.com SLAS605A – JUNE 2008 – REVISED JANUARY 2010 TERMINAL FUNCTIONS - TSSOP PACKAGES (continued) DEVICE NAME ADS7953 ADS7957 ADS7961 ADS7952 ADS7956 ADS7960 ADS7951 ADS7955 ADS7959 ADS7950 ADS7954 ADS7958 PIN NAME I/O FUNCTION PIN NO.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 SLAS605A – JUNE 2008 – REVISED JANUARY 2010 www.ti.com TERMINAL FUNCTIONS - TSSOP PACKAGES (continued) DEVICE NAME ADS7953 ADS7957 ADS7961 ADS7952 ADS7956 ADS7960 — 11, 12, 13, 14 ADS7951 ADS7955 ADS7959 ADS7950 ADS7954 ADS7958 PIN NAME I/O — — FUNCTION PIN NO.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 www.ti.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 SLAS605A – JUNE 2008 – REVISED JANUARY 2010 www.ti.com TYPICAL CHARATERISTICS (all ADS79XX Family Devices) SUPPLY CURRENT vs SUPPLY VOLTAGE STATIC SUPPLY CURRENT vs SUPPLY VOLTAGE 1.5 3.5 2.5 2 1.5 +VA - Supply Current - mA 1.4 3 1.3 1.2 1.1 1 1 2.7 3.4 4.1 4.8 +VA - Supply Voltage - V 0.9 2.7 5.5 fS = 1 MSPS, VDD = 5.5 V 3.4 TA = 25°C +VA - Supply Current - mA 3.2 3 2.8 2.6 2.4 2.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 www.ti.com SLAS605A – JUNE 2008 – REVISED JANUARY 2010 TYPICAL CHARACTERISTICS (12-Bit Devices Only) Variations for 10-bit and 8-bit devices are too small to be illustrated through the characteristic curves DIFFERENTIAL NONLINEARITY vs SUPPLY VOLTAGE INTEGRAL NONLINEARITY vs SUPPLY VOLTAGE DNL max 0.4 0.2 0 -0.2 DNL min -0.4 -0.6 -0.8 0.6 INL max 0.4 0.2 0 -0.2 INL min -0.4 -0.6 -0.8 3.2 4.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 SLAS605A – JUNE 2008 – REVISED JANUARY 2010 www.ti.com TYPICAL CHARACTERISTICS (12-Bit Devices Only) (continued) Variations for 10-bit and 8-bit devices are too small to be illustrated through the characteristic curves GAIN ERROR vs FREE-AIR TEMPERATURE SIGNAL-TO-NOISE RATIO vs SUPPLY VOLTAGE 1 SNR - Signal-to-Noise Ratio - dB 0.8 0.7 0.6 0.5 0.4 0.3 0.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 www.ti.com SLAS605A – JUNE 2008 – REVISED JANUARY 2010 TYPICAL CHARACTERISTICS (12-Bit Devices Only) (continued) Variations for 10-bit and 8-bit devices are too small to be illustrated through the characteristic curves SIGNAL-TO-NOISE + DISTORTION vs INPUT FREQUENCY 72 71.5 71 70.5 +VA = 5 V +VBD = 3 V, fS = 1 MSPS, TA = 25°C, MXO Shorted to AINP 70 69.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 SLAS605A – JUNE 2008 – REVISED JANUARY 2010 www.ti.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 www.ti.com SLAS605A – JUNE 2008 – REVISED JANUARY 2010 TYPICAL CHARACTERISTICS (12-Bit Devices Only) (continued) Variations for 10-bit and 8-bit devices are too small to be illustrated through the characteristic curves CROSSTALK vs INPUT FREQUENCY +VA = 5 V, +VBD = 5 V, fS = 1 MSPS 100 Isolation 71.5 71 80 Memory 60 40 +VA = 5 V, +VBD = 5 V, fS = 1 MSPS, CH0, CH1 20 70.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 SLAS605A – JUNE 2008 – REVISED JANUARY 2010 www.ti.com TYPICAL CHARACTERISTICS (12-Bit Devices Only) DNL 1 +VA = 5 V +VBD = 5 V, fS = 1 MSPS, TA = 25°C 0.8 0.6 DNL - LSBs 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 -1 0 1024 2048 3072 4096 3072 4096 Code Figure 42. INL 1 +VA = 5 V, +VBD = 5 V, fS = 1 MSPS 0.8 0.6 INL - LSBs 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 -1 1024 0 2048 Code Figure 43.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 www.ti.com SLAS605A – JUNE 2008 – REVISED JANUARY 2010 DETAILED DESCRIPTION DEVICE OPERATION The ADS7950 to ADS7961 are 12/10/8-bit multichannel devices. Figure 45, Figure 46, Figure 47, and Figure 48 show device operation timing. Device operation is controlled with CS, SCLK, and SDI. The device outputs its data on SDO.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 SLAS605A – JUNE 2008 – REVISED JANUARY 2010 www.ti.com a 1/t throughput (single frame) CS tw 1 tsu 1 SCLK 1 3 2 4 th 1 td 1 DO15 SDO 5 6 14 15 16 DO-0 LSB td 2 td 3 DO13 DO12 DO-11 MSB DO-10 MSB-1 DO-2 LSB+2 DO-1 LSB+1 DI-13 DI-12 DI-11 DI-10 DI-2 DI-1 DO14 tq tsu2 SDI DI-15 DI-14 DI-0 th 2 Figure 46.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 www.ti.com SLAS605A – JUNE 2008 – REVISED JANUARY 2010 The device has two (high and low) programmable alarm thresholds per channel. If the input crosses these limits; the device flags out an alarm on GPIO0/GPIO1 depending on the GPIO program register settings (refer to Table 10).
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 SLAS605A – JUNE 2008 – REVISED JANUARY 2010 www.ti.com Program Registers The 'Program registers’ are used for device configuration settings and are typically programmed once on powerup or after device reset.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 www.ti.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 SLAS605A – JUNE 2008 – REVISED JANUARY 2010 www.ti.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 www.ti.com SLAS605A – JUNE 2008 – REVISED JANUARY 2010 Table 1. Mode Control Register Settings for Manual Mode DESCRIPTION RESET STATE BITS LOGIC STATE FUNCTION DI15-12 0001 0001 Selects Manual Mode DI11 0 1 Enables programming of bits DI06-00. 0 Device retains values of DI06-00 from the previous frame.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 SLAS605A – JUNE 2008 – REVISED JANUARY 2010 www.ti.com OPERATING IN AUTO-1 MODE The details regarding entering and running in Auto-1 channel sequencing mode are illustrated in the flowchart in Figure 51. Table 2 lists the Mode Control Register settings for Auto-1 mode in detail.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 www.ti.com SLAS605A – JUNE 2008 – REVISED JANUARY 2010 Table 2. Mode Control Register Settings for Auto-1 Mode DESCRIPTION RESET STATE BITS LOGIC STATE FUNCTION DI15-12 0001 0010 Selects Auto-1 Mode DI11 0 1 Enables programming of bits DI10-00. 0 Device retains values of DI10-00 from previous frame.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 SLAS605A – JUNE 2008 – REVISED JANUARY 2010 www.ti.com The Auto-1 Program Register is programmed (once on powerup or reset) to pre-select the channels for the Auto-1 sequence. Auto-1 Program Register programming requires two CS frames for complete programming.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 www.ti.com SLAS605A – JUNE 2008 – REVISED JANUARY 2010 OPERATING IN AUTO-2 MODE The details regarding entering and running in Auto-2 channel sequencing mode are illustrated in Figure 53. Table 5 lists the Mode Control Register settings for Auto-2 mode in detail.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 SLAS605A – JUNE 2008 – REVISED JANUARY 2010 www.ti.com Table 5. Mode Control Register Settings for Auto-2 Mode DESCRIPTION RESET STATE BITS LOGIC STATE FUNCTION DI15-12 0001 0011 Selects Auto-2 Mode DI11 0 1 Enables programming of bits DI10-00. 0 Device retains values of DI10-00 from the previous frame. DI10 0 1 Channel number is reset to Ch-00.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 www.ti.com SLAS605A – JUNE 2008 – REVISED JANUARY 2010 Table 6. Program Register Settings for Auto-2 Mode RESET STATE BITS DESCRIPTION LOGIC STATE FUNCTION DI15-12 NA 1001 DI11-10 NA Do not care Auto-2 program register is selected for programming DI09-06 NA aaaa DI05-00 NA Do not care This 4-bit data represents the address of the last channel in the scanning sequence.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 SLAS605A – JUNE 2008 – REVISED JANUARY 2010 CS www.ti.com Device in any operation mode No Program alarm thresholds? Yes SDI: DI15..12 = 11XX (xx indicates group of four channels; refer table 8) Device enters alarm register programming sequence CS Entry into alarm register programming sequence CS SDI: DI15..
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 www.ti.com SLAS605A – JUNE 2008 – REVISED JANUARY 2010 Table 9. Alarm Program Register Settings (continued) DESCRIPTION BITS RESET STATE LOGIC STATE FUNCTION DI15-14 NA cc Where “cc” represents the lower two bits of the channel number in binary format. The device programs the alarm for the channel represented by the binary number “bbcc”. Note that “bb” is programmed in the first frame.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 SLAS605A – JUNE 2008 – REVISED JANUARY 2010 www.ti.com CS Device in any operation mode No Program GPIO register? Yes SDI: DI15..12 = 0100 Refer table 9 for DI11..00 data CS GPIO register programming End of GPIO register programming NOTE: The device continues its operation in selected mode during programming.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 www.ti.com SLAS605A – JUNE 2008 – REVISED JANUARY 2010 Table 10. GPIO Program Register Settings (continued) BITS RESET STATE DESCRIPTION LOGIC STATE 0 FUNCTION GPIO0 pin is configured as general purpose input. Valid setting for QFN packaged devices.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 SLAS605A – JUNE 2008 – REVISED JANUARY 2010 www.ti.com APPLICATION INFORMATION ANALOG INPUT The ADS79XX device family offers 12/10/8-bit ADCSs with 16/12/8/4 channel multiplexers for analog input. The multiplexer output is available on the MXO pin. AINP is the ADC input pin. The devices offers flexibility for a system designer as both signals are accessible esternally.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 www.ti.com SLAS605A – JUNE 2008 – REVISED JANUARY 2010 High Input impedance PGA (or non inverting buffer like THS4031) PGA Gain Control GPIO 1, 2, 3 MXO AINP GPIO 0 H/L Alarm Ch0 Ch1 Ch2 From sensors, INA etc. Source impedance has very little effect on performance. Refer to Typical Characteristics for details.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 SLAS605A – JUNE 2008 – REVISED JANUARY 2010 www.ti.com 80 W ohm MXO Ch0 AINP 200 Wohm 3 pF 5 pF 7 pF Chn 20M W ohm 3 pF Ch0 assumed to be on Chn assumed to be off Figure 59. ADC and Mux Equivalent Circuit REFERENCE The ADS79XX can operate with an external 2.5V ± 10mV reference.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 www.ti.com SLAS605A – JUNE 2008 – REVISED JANUARY 2010 Table 13.
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 SLAS605A – JUNE 2008 – REVISED JANUARY 2010 www.ti.com REVISION HISTORY Changes from Original (June 2008) to Revision A Page • Added QFN information to Features ..................................................................................................................................... 1 • Added QFN information to Description ................................................................
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ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 www.ti.com SLAS605A – JUNE 2008 – REVISED JANUARY 2010 • Added note to Table 2 ........................................................................................................................................................ 31 • Added note to Table 2 ...............................................................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 27-Jul-2013 Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
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PACKAGE MATERIALS INFORMATION www.ti.com 27-Jul-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device ADS7950SBRGER Package Package Pins Type Drawing VQFN RGE 24 ADS7950SBRGET VQFN RGE ADS7950SDBTR TSSOP DBT ADS7950SRGER VQFN ADS7950SRGET VQFN SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 3000 330.0 12.4 4.25 4.25 1.15 8.0 12.0 Q2 24 250 180.0 12.4 4.25 4.25 1.15 8.0 12.0 Q2 30 2000 330.0 16.4 6.
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PACKAGE MATERIALS INFORMATION www.ti.com 27-Jul-2013 Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant ADS7953SBRHBR VQFN RHB 32 3000 330.0 12.4 5.3 5.3 1.5 8.0 12.0 Q2 ADS7953SBRHBT VQFN RHB 32 250 180.0 12.4 5.3 5.3 1.5 8.0 12.0 Q2 ADS7953SDBTR TSSOP DBT 38 2000 330.0 16.4 6.9 10.2 1.8 12.0 16.0 Q1 ADS7953SRHBR VQFN RHB 32 3000 330.0 12.4 5.3 5.3 1.5 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 27-Jul-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) ADS7950SBRGER VQFN RGE 24 3000 367.0 367.0 35.0 ADS7950SBRGET VQFN RGE 24 250 210.0 185.0 35.0 ADS7950SDBTR TSSOP DBT 30 2000 367.0 367.0 38.0 ADS7950SRGER VQFN RGE 24 3000 367.0 367.0 35.0 ADS7950SRGET VQFN RGE 24 250 210.0 185.0 35.0 ADS7951SBDBTR TSSOP DBT 30 2000 367.0 367.0 38.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.