Datasheet

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ADS8317

SAR

Serial

Interface

Comparator

ADS8317

S/H Amp

DCLOCK

OUT

CS/SHDN

+IN

REF

−

CDAC

ADS8317

www.ti.com

.................................................................................................................................................... SBAS356D –JUNE 2007–REVISED OCTOBER 2009

16-Bit, High-Speed, 2.7V to 5.5V microPower Sampling

ANALOG-TO-DIGITAL CONVERTER

Check for Samples: ADS8317

FEATURES

DESCRIPTION

• 16 Bits No Missing Codes (Full-Supply Range,

The ADS8317 is a 16-bit, sampling, analog-to-digital

High or Low Grade)

(A/D) converter specified for a supply voltage range

from 2.7V to 5.5V. It requires very little power, even

• Very Low Noise: 5LSB

when operating at the full data rate. At lower data

• Excellent Linearity:

rates, the high speed of the device enables it to

±0.8LSB typ, ±1.5LSB max INL

spend most of its time in the power-down mode. For

+0.7LSB typ, +1.25LSB max DNL

example, the average power dissipation is less than

±1mV max Offset

0.2mW at a 10kHz data rate.

±16LSB typ Gain Error

The ADS8317 offers excellent linearity and very low

• microPower:

noise and distortion. It also features a synchronous

10mW at 5V, 250kHz

serial (SPI/SSI-compatible) interface and a differential

4mW at 2.7V, 200kHz

input. The reference voltage can be set to any level

2mW at 2.7V, 100kHz

within the range of 0.1V to V

/2.

0.2mW at 2.7V, 10kHz

Low power and small size make the ADS8317 ideal

• Packages: MSOP-8, SON-8

for portable and battery-operated systems. It is also

an excellent fit for remote data-acquisition modules,

• Pin-Compatible with the ADS8321

simultaneous multichannel systems, and isolated

• Serial ( SPI™/SSI) Interface

data acquisition. The ADS8317 is available in

MSOP-8 and SON-8 packages. The SON package

APPLICATIONS

size is the same as a 3x3 QFN package.

• Battery-Operated Systems

• Remote Data Acquisition

• Isolated Data Acquisition

• Simultaneous Sampling, Multichannel

Systems

• Industrial Controls

• Robotics

• Vibration Analysis

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.

2SPI is a trademark of Motorola, Inc.

3All other trademarks are the property of their respective owners.

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 (35 pages)

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AD AD S83 S8 17 317 ADS8317 www.ti.com .................................................................................................................................................... SBAS356D – JUNE 2007 – REVISED OCTOBER 2009 16-Bit, High-Speed, 2.7V to 5.5V microPower Sampling ANALOG-TO-DIGITAL CONVERTER Check for Samples: ADS8317 FEATURES DESCRIPTION • The ADS8317 is a 16-bit, sampling, analog-to-digital (A/D) converter specified for a supply voltage range from 2.7V to 5.5V.
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ADS8317 SBAS356D – JUNE 2007 – REVISED OCTOBER 2009 .................................................................................................................................................... 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.
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ADS8317 www.ti.com .................................................................................................................................................... SBAS356D – JUNE 2007 – REVISED OCTOBER 2009 RECOMMENDED OPERATING CONDITIONS MIN Supply voltage, GND to VDD MAX UNIT 3.6 V 5.5 V 1 VDD/2 V –IN to GND –0.2 VDD + 0.2 V +IN to GND –0.2 VDD + 0.2 V +IN – (–IN) –VREF +VREF V –40 +125 °C Low-voltage levels 2.7 5V logic levels 4.
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ADS8317 SBAS356D – JUNE 2007 – REVISED OCTOBER 2009 .................................................................................................................................................... www.ti.com ELECTRICAL CHARACTERISTICS: VDD = +5V (continued) At –40°C to +85°C, VREF = +2.5V, –IN = +2.5V, fSAMPLE = 250kHz, and fCLK = 24 × fSAMPLE, unless otherwise noted.
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ADS8317 www.ti.com .................................................................................................................................................... SBAS356D – JUNE 2007 – REVISED OCTOBER 2009 ELECTRICAL CHARACTERISTICS: VDD = +2.7V At –40°C to +85°C, VREF = +1.25V, –IN = 1.25V, fSAMPLE = 200kHz, and fCLK = 24 × fSAMPLE, unless otherwise noted. ADS8317I PARAMETER TEST CONDITIONS MIN TYP ADS8317IB MAX MIN –VREF VREF –0.1 VDD + 0.1 TYP MAX UNIT –VREF VREF V –0.1 VDD + 0.
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ADS8317 SBAS356D – JUNE 2007 – REVISED OCTOBER 2009 .................................................................................................................................................... www.ti.com ELECTRICAL CHARACTERISTICS: VDD = +2.7V (continued) At –40°C to +85°C, VREF = +1.25V, –IN = 1.25V, fSAMPLE = 200kHz, and fCLK = 24 × fSAMPLE, unless otherwise noted.
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ADS8317 www.ti.com ....................................................................................................................................................
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ADS8317 SBAS356D – JUNE 2007 – REVISED OCTOBER 2009 .................................................................................................................................................... www.ti.
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ADS8317 www.ti.com .................................................................................................................................................... SBAS356D – JUNE 2007 – REVISED OCTOBER 2009 TIMING INFORMATION (continued) Timing Characteristics SYMBOL DESCRIPTION MIN TYP 4.5 MAX 5.
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ADS8317 SBAS356D – JUNE 2007 – REVISED OCTOBER 2009 .................................................................................................................................................... www.ti.com TYPICAL CHARACTERISTICS: VDD = +5V At TA = 25°C, VREF = 2.5V, fSAMPLE = 250kHz, fCLK = 24 × fSAMPLE, unless otherwise noted.
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ADS8317 www.ti.com .................................................................................................................................................... SBAS356D – JUNE 2007 – REVISED OCTOBER 2009 TYPICAL CHARACTERISTICS: VDD = +5V (continued) At TA = 25°C, VREF = 2.5V, fSAMPLE = 250kHz, fCLK = 24 × fSAMPLE, unless otherwise noted.
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ADS8317 SBAS356D – JUNE 2007 – REVISED OCTOBER 2009 .................................................................................................................................................... www.ti.com TYPICAL CHARACTERISTICS: VDD = +5V (continued) At TA = 25°C, VREF = 2.5V, fSAMPLE = 250kHz, fCLK = 24 × fSAMPLE, unless otherwise noted. SPURIOUS-FREE DYNAMIC RANGE AND TOTAL HARMONIC DISTORTION vs INPUT FREQUENCY 120 -120 115 -115 SFDR 15.0 14.
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ADS8317 www.ti.com .................................................................................................................................................... SBAS356D – JUNE 2007 – REVISED OCTOBER 2009 TYPICAL CHARACTERISTICS: VDD = +2.7V At TA = 25°C, VREF = 1.25V, fSAMPLE = 200kHz, fCLK = 24 × fSAMPLE, unless otherwise noted.
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ADS8317 SBAS356D – JUNE 2007 – REVISED OCTOBER 2009 .................................................................................................................................................... www.ti.com TYPICAL CHARACTERISTICS: VDD = +2.7V (continued) At TA = 25°C, VREF = 1.25V, fSAMPLE = 200kHz, fCLK = 24 × fSAMPLE, unless otherwise noted. POWER-DOWN CURRENT vs TEMPERATURE SUPPLY CURRENT vs SAMPLING RATE 10 25 1 23 Supply Current (mA) Power-Down Current (nA) 24 22 21 20 19 0.1 0.
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ADS8317 www.ti.com .................................................................................................................................................... SBAS356D – JUNE 2007 – REVISED OCTOBER 2009 TYPICAL CHARACTERISTICS: VDD = +2.7V (continued) At TA = 25°C, VREF = 1.25V, fSAMPLE = 200kHz, fCLK = 24 × fSAMPLE, unless otherwise noted. SPURIOUS-FREE DYNAMIC RANGE AND TOTAL HARMONIC DISTORTION vs INPUT FREQUENCY 110 EFFECTIVE NUMBER OF BITS vs INPUT FREQUENCY -110 15.0 -105 14.
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ADS8317 SBAS356D – JUNE 2007 – REVISED OCTOBER 2009 .................................................................................................................................................... www.ti.com THEORY OF OPERATION The ADS8317 is a classic Successive Approximation Register (SAR) analog-to-digital (A/D) converter. The architecture is based on capacitive redistribution that inherently includes a sample-and-hold function. The converter is fabricated on a 0.6μ CMOS process.
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ADS8317 www.ti.com .................................................................................................................................................... SBAS356D – JUNE 2007 – REVISED OCTOBER 2009 5 5 4 3.8 2.8 3 Single-Ended Input 2 2.2 1 0.2 0 VDD = 5V Common Voltage Range (V) Common Voltage Range (V) VDD = 5V 4 3.8 2.75 3 2 Differential Input 1 0.95 0 -0.3 -0.3 -1 -1 0 0.5 1.0 1.5 2.0 2.5 0 0.5 VREF (V) 1.0 1.5 Figure 38.
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ADS8317 SBAS356D – JUNE 2007 – REVISED OCTOBER 2009 .................................................................................................................................................... www.ti.com The input current on the analog inputs depends on a number of factors: sample rate, input voltage, and source impedance. Essentially, the current into the ADS8317 charges the internal capacitor array during the sample period.
PAGE 19
ADS8317 www.ti.com .................................................................................................................................................... SBAS356D – JUNE 2007 – REVISED OCTOBER 2009 The equivalent input circuit for the reference voltage is presented in Figure 43. At the same time, an equivalent capacitor of 24pF is switched. To obtain optimum performance from the ADS8317, special care must be taken in designing the interface circuit to the reference input pin.
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ADS8317 SBAS356D – JUNE 2007 – REVISED OCTOBER 2009 .................................................................................................................................................... www.ti.com DIGITAL INTERFACE Signal Levels The ADS8317 has a wide range of power-supply voltage. The A/D converter, as well as the digital interface circuit, is designed to accept and operate from 2.7V up to 5.5V. This voltage range accommodates different logic levels.
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ADS8317 www.ti.com .................................................................................................................................................... SBAS356D – JUNE 2007 – REVISED OCTOBER 2009 0111 1111 1111 1111 65535 0111 1111 1111 1110 65534 0111 1111 1111 1101 65533 0000 0000 0000 0001 32769 0000 0000 0000 0000 32768 1111 1111 1111 1111 32767 1000 0000 0000 0010 2 1000 0000 0000 0001 1 1000 0000 0000 0000 Step Digital Output Code Binary Twos Complement 0 +38.
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ADS8317 SBAS356D – JUNE 2007 – REVISED OCTOBER 2009 .................................................................................................................................................... www.ti.com POWER DISSIPATION Short Cycling The architecture of the converter, the semiconductor fabrication process, and a careful design allow the ADS8317 to convert at up to a 250kHz rate while requiring very little power.
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ADS8317 www.ti.com .................................................................................................................................................... SBAS356D – JUNE 2007 – REVISED OCTOBER 2009 LAYOUT For optimum performance, care should be taken with the physical layout of the ADS8317 circuitry. This caution is particularly true if the reference voltage is low and/or the conversion rate is high. At a 250kHz conversion rate, the ADS8317 makes a bit decision every 167ns.
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ADS8317 SBAS356D – JUNE 2007 – REVISED OCTOBER 2009 .................................................................................................................................................... www.ti.com APPLICATION CIRCUITS Figure 45 shows an example of a basic data acquisition system. The ADS8317 input range is connected to 2.5V or 4.096V. The 5Ω resistor and 1μF to 10μF capacitor filters the microcontroller noise on the supply, as well as any high-frequency noise from the supply itself.
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ADS8317 www.ti.com .................................................................................................................................................... SBAS356D – JUNE 2007 – REVISED OCTOBER 2009 REVISION HISTORY NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision C (June 2008) to Revision D ....................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 18-Oct-2013 Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
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PACKAGE MATERIALS INFORMATION www.ti.com 6-Nov-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing ADS8317IBDGKR VSSOP DGK 8 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 2500 330.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1 ADS8317IBDGKT VSSOP DGK 8 250 180.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1 ADS8317IBDRBR SON DRB 8 3000 330.0 12.4 3.3 3.3 1.1 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 6-Nov-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) ADS8317IBDGKR VSSOP DGK 8 2500 367.0 367.0 35.0 ADS8317IBDGKT VSSOP DGK 8 250 210.0 185.0 35.0 ADS8317IBDRBR SON DRB 8 3000 338.1 338.1 20.6 ADS8317IBDRBT SON DRB 8 250 210.0 185.0 35.0 ADS8317IDGKR VSSOP DGK 8 2500 367.0 367.0 35.0 ADS8317IDGKT VSSOP DGK 8 250 210.0 185.0 35.
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