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

MAX11190 4-Channel, Dual, Simultaneous Sampling,

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

3mm x 3mm TQFN Package

www.maximintegrated.com

Maxim Integrated

│

TABLE OF CONTENTS

General Description ............................................................................ 1

Applications .................................................................................. 1

Benefits and Features .......................................................................... 1

Functional Diagram ............................................................................ 1

Absolute Maximum Ratings ...................................................................... 4

Package Thermal Characteristics ................................................................. 4

Electrical Characteristics ........................................................................ 4

Typical Operating Characteristics ................................................................. 8

Pin Configuration ............................................................................. 10

Pin Description ............................................................................... 10

Typical Operating Circuit ........................................................................11

Detailed Description........................................................................... 12

Serial Interface .............................................................................12

Analog Input ...............................................................................12

ADC Transfer Function .......................................................................13

Operation Modes ...........................................................................13

Power-Down Mode .......................................................................13

Entering Power-Down Mode ................................................................13

Exiting Power-Down Mode .................................................................14

Supply Current vs. Sampling Rate ..............................................................14

Dual-Channel Operation .....................................................................15

14-Cycle Conversion Mode ...................................................................15

Applications Information........................................................................ 15

Layout,Grounding,andBypassing .............................................................15

Choosing an Input Amplifier ..................................................................15

Choosing a Reference .......................................................................16

Definitions................................................................................... 17

Integral Nonlinearity .........................................................................17

Differential Nonlinearity.......................................................................17

Offset Error ................................................................................17

Gain Error .................................................................................17

Aperture Jitter ..............................................................................17

Aperture Delay .............................................................................17

Aperture Delay Matching .....................................................................17

Signal-To-Noise Ratio (SNR) ..................................................................17

Signal-To-Noise Ratio and Distortion (SINAD).....................................................17

Total Harmonic Distortion .....................................................................17

Spurious-Free Dynamic Range (SFDR) ..........................................................17