ADS1222 - TI

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

ADS1222
Manufacturer

TI
ChipWorker Part#

CW435501131
Description

24Bit A/D Conv with 2Channel Diff Input Multiplexer
Documentation

Datasheet

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ADS1222 Specifications

Attribute	Attribute Value

Part Number	ADS1222
Manufacturer	TI
ChipWorker Part#	CW435501131
Documentation	Datasheet
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Product Lifecycle Status
RoHS	RoHS Compliant
Lead-Free Status	Lead Free

Product Description

The ADS1222 is a 2-channel, 24-bit, delta-sigma analog-to-digital (A/D) converter. It offers excellent performance and low power in a TSSOP-14 package. The ADS1222 is well-suited for demanding, high-resolution measurements, especially in portable systems and other space-saving and power-constrained applications.
A delta-sigma (ΔΣ) modulator and digital filter form the basis of the A/D converter. The analog modulator has a ±5V differential input range. An input multiplexer (mux) is used to select between two separate differential input channels. A buffer can be selected to increase the input impedance of the measurement.
A simple, 2-wire serial interface provides all the necessary control. Data retrieval, self-calibration, and Standby mode are handled with a few simple waveforms. When only single conversions are needed, the ADS1222 can be quickly shut down (Standby mode) while idle between measurements to dramatically reduce the overall power consumption. Multiple ADS1222s can be connected together to create a synchronously sampling multichannel measurement system. The ADS1222 is designed to easily connect to microcontrollers, such as the MSP430.
The ADS1222 supports 2.7V to 5.5V supplies. Power is typically less than 1mW in 3V operation and less than 1µW during Standby mode.
240SPS Data Rate with 4MHz Clock
20-Bit Effective Resolution
Input Multiplexer with Two Differential Channels
Pin-Selectable, High-Impedance Input Buffer
±5V Differential Input Range
0.0003% INL (typ), 0.0015% INL (max)
Self-Calibrating
Simple 2-Wire Serial Interface
On-Chip Temperature Sensor
Single Conversions with Standby Mode
Low Current Consumption: 300µA
Analog Supply: 2.7V to 5.5V
APPLICATIONS
Hand-Held Instrumentation
Portable Medical Equipment
Industrial Process Control
Weigh Scales
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