EmbeddedRelated.com
    Parts    ADS7844E/2K5
ADS7844E/2K5

TIADS7844E/2K5

Texas Instruments
12 Bit Analog to Digital Converter 4, 8 Input 1 SAR 20-SSOP
Active3,595 in stock
Datasheet Digi-Key Compare Prices

Overview

The ADS7844E/2K5 is an 8-channel, 12-bit sampling Analog-to-Digital Converter (ADC) featuring a synchronous serial interface and a 200kHz maximum throughput rate. It is designed for low-power operation, consuming only 3mW at full speed while offering a 1uA power-down mode for battery-sensitive applications.

Why Choose This Part

The ADS7844 provides high flexibility with its configurable 8-channel input multiplexer that supports both single-ended and differential measurements. It ensures high reliability with no missing codes over a -40C to +85C temperature range and features a simple SPI-compatible serial interface for easy integration with standard microcontrollers.

Applications

Industrial Process Control
Monitor multiple analog sensor inputs such as pressure, temperature, and flow across eight single-ended or four differential channels.
Battery-Powered Systems
Utilize the 1uA shutdown mode and low 3mW run current to extend the life of portable electronic devices.
Data Acquisition
High-density 12-bit sampling in a compact 20-SSOP package for multi-channel logging applications.
Test and Measurement
Integrated multiplexer and sample-and-hold architecture simplify the front-end design for portable instrumentation.

Key Specifications

Input Type Differential, Single Ended
Architecture SAR
Configuration MUX-S/H-ADC
Mounting Type Surface Mount
Data Interface SPI
Number of Bits 12
Package / Case 20-SSOP (0.154", 3.90mm Width)
Reference Type External
Ratio - S/H:ADC 1:1
Number of Inputs 4, 8
Operating Temperature -40degC ~ 85degC
Supplier Device Package 20-SSOP
Number of A/D Converters 1
Voltage - Supply, Analog 2.7V ~ 3.6V, 5V
Voltage - Supply, Digital 2.7V ~ 3.6V, 5V
Sampling Rate (Per Second) 200k

Getting Started

To evaluate the ADS7844, connect an external reference voltage to the VREF pin as the device does not include an internal reference. Interface the device with a microcontroller using a standard 4-wire SPI connection, ensuring the VDD supply remains between 4.75V and 5.25V for specified performance.