_______________________________________________________________ Maxim Integrated Products 1

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

20-Bit, Single-Channel, Ultra-Low-Power, Delta-

Sigma ADCs with Programmable Gain and GPIO

19-5294; Rev 0; 8/10

General Description

The MAX11206/MAX11207 are ultra-low-power (< 300FA

active current), high-resolution, serial-output ADCs.

These devices provide the highest resolution per unit

power in the industry, and are optimized for applications

that require very high dynamic range with low power,

such as sensors on a 4mA to 20mA industrial control

loop. Optional input buffers provide isolation of the sig-

nal inputs from the switched capacitor sampling network

allowing these converters to be used with high-imped-

ance sources without compromising available dynamic

range or linearity. The devices provide a high-accuracy

internal oscillator that requires no external components.

When used with the specified data rates, the internal

digital filter provides more than 100dB rejection of 50Hz

or 60Hz line noise. The devices are configurable using

the SPI™ interface and include four GPIOs that can be

used for external mux control. The MAX11206 includes

digital programmable gain of 1 to 128.

The MAX11206/MAX11207 operate over the -40NC to

+85NC temperature range, and are available in a 16-pin

QSOP package.

Applications

Sensor Measurement (Temperature and

Pressure)

Portable Instrumentation

Battery Applications

Weigh Scales

Features

S

20-Bit Noise-Free Resolution

S

S

3ppm INL (typ), 10ppm (max)

S

No Missing Codes

S

Ultra-Low Power Dissipation

Operating-Mode Current Drain < 300µA (max)

Sleep-Mode Current Drain < 0.4µA

S

Programmable Gain (1 to 128) (MAX11206)

S

Four SPI-Controlled GPIOs for External Mux

Control

S

2.7V to 3.6V Analog Supply Voltage Range

S

1.7V to 3.6V Digital and I/O Supply Voltage Range

S

Fully Differential Signal and Reference Inputs

S

High-Impedance Inputs

Optional Input Buffers on Both Signal and

Reference Inputs

S

> 100dB (min) 50Hz/60Hz Rejection

S

SPI-, QSPI™-, MICROWIRE™-Compatible Serial

Interface

S

On-Demand Offset and Gain Self-Calibration and

System Calibration

S

User-Programmable Offset and Gain Registers

S

-40°C to +85°C Operating Temperature Range

S

±2kV ESD Protection

S

Lead(Pb)-Free and RoHS-Compliant QSOP

Package

SPI and QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corp.

Ordering Information

+Denotes a lead(Pb)-free/RoHS-compliant package.

Selector Guide

EVALUATION

KIT

AVAILABLE

PART

TEMP RANGE

PIN-PACKAGE

MAX11206EEE+

-40

°C to +85°C

16 QSOP

MAX11207EEE+

-40

°C to +85°C

16 QSOP

RESOLUTION

(BITS)

4-WIRE SPI, 16-PIN QSOP,

PROGRAMMABLE GAIN

4-WIRE SPI,

16-PIN QSOP

2-WIRE SERIAL,

10-PIN µMAX

24

MAX11210

MAX11200

MAX11201 (with buffers)

MAX11202 (without buffers)

20

MAX11206

MAX11207

MAX11208

18

MAX11209

MAX11211

MAX11212

16

MAX11213

MAX11203

MAX11205