Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsData collecting ICsData acquisition IC - AD converter (ADC) External TQFN 16 EP

MAX11190 4-Channel, Dual, Simultaneous Sampling,

2.2V to 3.6V, 12-Bit, 3Msps SAR ADC in Tiny

3mm x 3mm TQFN Package

19-6743; Rev 2; 12/14

For related parts and recommended products to use with this part, refer

to www.maximintegrated.com/MAX11190.related.

Ordering Information appears at end of data sheet.

General Description

The MAX11190 is a 4-channel, dual, multiplexed, 12-bit,

compact, high-speed, low-power, successive approxi-

mation analog-to-digital converter (ADC). This high-

performance dual ADC includes high-dynamic range

sample-and-holds and a high-speed serial interface. This

ADC accepts a full-scale input from 0V to the reference

voltage.

The device features two dual, single-ended analog inputs

connected to two ADC cores using 2:1 MUXs. The device

also includes a separate supply input for data interface

and dedicated inputs for reference voltage.

This device operates from a 2.2V to 3.6V supply and

consumes only 10.5mW at 3Msps. The device includes

full power-down mode and fast wake-up for optimal

power management and a high-speed 3-wire serial inter-

face. The 3-wire serial interface directly connects to SPI,

QSPI™, and MICROWIRE

devices without external

logic. Each of the two internal ADCs has its own dedicated

DOUTA/DOUTB for faster data communication.

Excellent dynamic performance, low voltage, low power,

ease of use, and small package size make this converter

ideal for simultaneous data-acquisition applications, and

for other applications that demand low power consump-

tion and minimal space.

The device is available in a 3mm x 3mm, 16-pin TQFN

package and operates over the -40ºC to +125ºC tempera-

ture range.

Applications

● MotorControl

● SimultaneousDataAcquisition

● MedicalInstrumentation

● ProcessControl

Benets and Features

● IntegrationandPackagingSaveSpace

• Simultaneous Sampling

• Dual, 4-Channel, Single-Ended 12-Bit Resolution

ADC (2 x 2)

• 16-Pin, 3mm x 3mm TQFN Package

● ExcellentPerformanceIdealforMotorControl

Applications

• 72dB SNR

• 3Msps Conversion Rate without Pipeline Delay

• External Reference Inputs

• Wide -40°C to +125°C Operation

● LowPowerDesignSimplifiesPower-Supply

Requirements

• VeryLowPowerConsumptionat5μA/ksps

• 10.5mW at 3Msps

• 2.2V to 3.6V Supply Voltage

• 2.6μAPower-DownCurrent

● DualSPIPortsSimplifiesSystemDesign

• SPI-/QSPI-/MICROWIRE-Compatible Serial

Interface with Two DOUTA/DOUTB Pins

• Dedicated Digital Output Supply Allows Serial

Interface to Directly Connect to 1.5V, 1.8V, 2.5V, or

3V Digital Systems

QSPI is a trademark of Motorola, Inc.

MICROWIRE is a registered trademark of National

Semiconductor Corporation

Functional Diagram

EVALUATION KIT AVAILABLE

CDAC-AMUX

REFA

AIN2A

CHSEL

AIN1A

SAR-A

OUTPUT

BUFFER

CDAC-BMUX

AIN2B

AIN1B

OVDD

GND

DOUTA

SAR-B

OUTPUT

BUFFER

DOUTB

CONTROL

LOGIC

CONTROL

LOGIC

SCLK

MAX11190

REFB

Summary of content (19 pages)

PAGE 1
EVALUATION KIT AVAILABLE MAX11190 4-Channel, Dual, Simultaneous Sampling, 2.2V to 3.6V, 12-Bit, 3Msps SAR ADC in Tiny 3mm x 3mm TQFN Package General Description Benefits and Features The device features two dual, single-ended analog inputs connected to two ADC cores using 2:1 MUXs. The device also includes a separate supply input for data interface and dedicated inputs for reference voltage.
PAGE 2
MAX11190 4-Channel, Dual, Simultaneous Sampling, 2.2V to 3.6V, 12-Bit, 3Msps SAR ADC in Tiny 3mm x 3mm TQFN Package TABLE OF CONTENTS General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 3
MAX11190 4-Channel, Dual, Simultaneous Sampling, 2.2V to 3.6V, 12-Bit, 3Msps SAR ADC in Tiny 3mm x 3mm TQFN Package TABLE OF CONTENTS (continued) Full-Power Bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Full-Linear Bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 4
MAX11190 4-Channel, Dual, Simultaneous Sampling, 2.2V to 3.6V, 12-Bit, 3Msps SAR ADC in Tiny 3mm x 3mm TQFN Package Absolute Maximum Ratings VDD to GND........................................................................ -0.3V to +4V AIN1A, AIN2A to GND.....-0.3V to the lower of (VDD + 0.3V) and +4.0V REFA, OVDD to GND.....-0.3V to the lower of (VDD + 0.3V) and +4.0V AIN1B, AIN2B to GND.....-0.3V to the lower of (VDD + 0.3V) and +4.0V REFB to GND..................-0.3V to the lower of (VDD + 0.
PAGE 5
MAX11190 4-Channel, Dual, Simultaneous Sampling, 2.2V to 3.6V, 12-Bit, 3Msps SAR ADC in Tiny 3mm x 3mm TQFN Package Electrical Characteristics (continued) (VDD = +2.2V to +3.6V, REFA = REFB = VDD, OVDD = VDD, unless otherwise noted. fSCLK = 48MHz, 3Msps, 50% duty cycle. Reference pins are independent, CDOUTA/DOUTB = 10pF. TA = -40ºC to 125ºC, unless otherwise noted. Typical values are at TA = +25ºC.
PAGE 6
MAX11190 4-Channel, Dual, Simultaneous Sampling, 2.2V to 3.6V, 12-Bit, 3Msps SAR ADC in Tiny 3mm x 3mm TQFN Package Electrical Characteristics (continued) (VDD = +2.2V to +3.6V, REFA = REFB = VDD, OVDD = VDD, unless otherwise noted. fSCLK = 48MHz, 3Msps, 50% duty cycle. Reference pins are independent, CDOUTA/DOUTB = 10pF. TA = -40ºC to 125ºC, unless otherwise noted. Typical values are at TA = +25ºC.
PAGE 7
MAX11190 4-Channel, Dual, Simultaneous Sampling, 2.2V to 3.6V, 12-Bit, 3Msps SAR ADC in Tiny 3mm x 3mm TQFN Package SAMPLE SAMPLE t6 CS t1 t5 t2 SCLK DOUTA DOUTB 16 1 2 0 HIGH IMPEDANCE 3 D11 4 D10 5 D9 6 7 D8 D7 8 D6 9 D5 10 D4 11 D3 12 D2 13 D1 14 D0 15 0 0 (MSB) t3 t4 16 t7 1 HIGH IMPEDANCE t8 tQUIET tCONVERT tACQ 1/fSAMPLE Figure 1. Interface Signals for Maximum Throughput t7 t4 SCLK DOUTA DOUTB SCLK OLD DATA VIH NEW DATA VIL Figure 2.
PAGE 8
MAX11190 4-Channel, Dual, Simultaneous Sampling, 2.2V to 3.6V, 12-Bit, 3Msps SAR ADC in Tiny 3mm x 3mm TQFN Package Typical Operating Characteristics -0.5 3000 -1.0 4000 0 1000 DIGITAL OUTPUT CODE DNL (LSB) 0 -0.5 2 1 A 0 -1 -2 -1.0 0 1000 2000 3000 -3 4000 MAX11190 toc05 73 SNR (A) 72 70 B 1 0 A -1 -3 -40 -25 -10 5 20 35 50 65 80 95 110 125 THD vs. ANALOG INPUT FREQUENCY 110 fS = 3Msps A -90 SFDR vs.
PAGE 9
MAX11190 4-Channel, Dual, Simultaneous Sampling, 2.2V to 3.6V, 12-Bit, 3Msps SAR ADC in Tiny 3mm x 3mm TQFN Package Typical Operating Characteristics (continued) THD vs. INPUT RESISTANCE -85 A IREF (µA) THD (dB) 150 A -80 B MAX11190 toc09 fS = 3Msps fIN = 1.0183MHz -75 200 MAX11190 toc08 -70 REFERENCE CURRENT vs. SAMPLING RATE 100 -90 50 -95 -100 20 40 60 80 0 100 0 500 1000 RIN (Ω) TOTAL SUPPLY CURRENT vs. TEMPERATURE 5.6 5.4 fS = 3Msps fIN = 1.0183MHz 73.
PAGE 10
MAX11190 4-Channel, Dual, Simultaneous Sampling, 2.2V to 3.6V, 12-Bit, 3Msps SAR ADC in Tiny 3mm x 3mm TQFN Package VDD REFB REFA TOP VIEW VDD Pin Configuration 12 11 10 9 GND 13 CS 14 MAX11190 CHSEL 15 EP* 2 3 SCLK AIN2B 7 AIN2A 6 AIN1B 5 AIN1A 4 GND 1 DOUTB + DOUTA OVDD 16 8 TQFN *EP = EXPOSED PAD. Pin Description PIN NAME FUNCTION 1 DOUTA Serial-Data Output of ADC A. DOUTA changes state on SCLK’s falling edge. 2 DOUTB Serial-Data Output of ADC B.
PAGE 11
MAX11190 4-Channel, Dual, Simultaneous Sampling, 2.2V to 3.6V, 12-Bit, 3Msps SAR ADC in Tiny 3mm x 3mm TQFN Package Typical Operating Circuit VDD OVDD +3V +3V SCLK AIN1A ANALOG INPUTS CS AIN1B DOUTA MISOA AIN2B DOUTB MISOB REFA CHSEL AIN2A ANALOG INPUTS CPU MAX11190 +3V REFB +3V GND www.maximintegrated.
PAGE 12
MAX11190 4-Channel, Dual, Simultaneous Sampling, 2.2V to 3.6V, 12-Bit, 3Msps SAR ADC in Tiny 3mm x 3mm TQFN Package Detailed Description The MAX11190 is a 3Msps, 12-bit, low-power, singlesupply, dual, multiplexed simultaneous-sampling ADC. The device operates from a 2.2V to 3.6V supply and consumes only 16.4mW (VDD = 3V) /10.5mW (VDD = 2.2V) at 3Msps. This device is capable of sampling at full rate when driven by 48MHz.
PAGE 13
MAX11190 4-Channel, Dual, Simultaneous Sampling, 2.2V to 3.6V, 12-Bit, 3Msps SAR ADC in Tiny 3mm x 3mm TQFN Package ADC Transfer Function To remain in normal mode, keep CS low until the falling edge of the 10th SCLK cycle. Pulling CS high after the 10th SCLK falling edge keeps the part in normal mode. However, pulling CS high before the 10th SCLK falling edge terminates the conversion, both DOUTA/DOUTBs go into high-impedance mode, and the device enters powerdown mode. See Figure 7.
PAGE 14
MAX11190 4-Channel, Dual, Simultaneous Sampling, 2.2V to 3.6V, 12-Bit, 3Msps SAR ADC in Tiny 3mm x 3mm TQFN Package CS SCLK 1 2 3 4 5 DOUTA DOUTB HIGH IMPEDANCE 6 7 8 9 10 11 12 13 14 15 INVALID DATA (DUMMY CONVERSION) 16 N 1 2 3 4 5 6 7 8 9 10 11 12 13 14 VALID DATA HIGH IMPEDANCE 15 16 HIGH IMPEDANCE Figure 8.
PAGE 15
MAX11190 4-Channel, Dual, Simultaneous Sampling, 2.2V to 3.6V, 12-Bit, 3Msps SAR ADC in Tiny 3mm x 3mm TQFN Package Applications Information Dual-Channel Operation The MAX11190 features dual simultaneous-sampling ADCs each with two multiplexed channels. This device uses a channel-select (CHSEL) input to select between analog input AIN1A/AIN1B (CHSEL = 0) or AIN2A/AIN2B (CHSEL = 1).
PAGE 16
MAX11190 4-Channel, Dual, Simultaneous Sampling, 2.2V to 3.6V, 12-Bit, 3Msps SAR ADC in Tiny 3mm x 3mm TQFN Package between the application of an input voltage step and the point at which the output signal reaches and stays within a given error band centered on the resulting steady-state amplifier output level. The ADC input sampling capacitor charges during the sampling cycle, referred to as the acquisition period.
PAGE 17
MAX11190 4-Channel, Dual, Simultaneous Sampling, 2.2V to 3.6V, 12-Bit, 3Msps SAR ADC in Tiny 3mm x 3mm TQFN Package Definitions signal to the RMS noise. RMS noise includes all spectral components to the Nyquist frequency excluding the fundamental, the first five harmonics, and the DC offset. Integral Nonlinearity Integral nonlinearity (INL) is the deviation of the values on an actual transfer function from a straight line.
PAGE 18
MAX11190 4-Channel, Dual, Simultaneous Sampling, 2.2V to 3.6V, 12-Bit, 3Msps SAR ADC in Tiny 3mm x 3mm TQFN Package Ordering Information PART MAX11190ATE+ Package Information PIN-PACKAGE BITS SPEED 16 TQFN-EP* 12 3Msps Note: All devices are specified over the -40ºC to +125ºC operating temperature range. +Denotes lead(Pb)-free/RoHS-compliant package. *EP = Exposed pad. Chip Information For the latest package outline information and land patterns (footprints), go to www.maximintegrated.
PAGE 19
MAX11190 4-Channel, Dual, Simultaneous Sampling, 2.2V to 3.6V, 12-Bit, 3Msps SAR ADC in Tiny 3mm x 3mm TQFN Package Revision History REVISION NUMBER REVISION DATE PAGES CHANGED DESCRIPTION 0 6/13 Initial release 1 2/14 Updated Package Thermal Characteristics and Package Information — 2 12/14 Updated Benefits and Features section 4, 18 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.