Texas Instruments ADS1191IRSMT

Description
The ADS1191/2 are multichannel, simultaneous sampling, 16-bit, delta-sigma (AΣ) analog-to-digital converters (ADCs) with a built-in programmable gain amplifier (PGA), internal reference, and an onboard oscillator. They incorporate features commonly required in portable, low-power medical electrocardiogram (ECG), sports, and fitness applications. With high levels of integration and exceptional performance, the ADS1191/2 family enables the creation of scalable medical instrumentation systems at significantly reduced size, power, and overall cost.
The ADS1191/2 have a flexible input multiplexer per channel that can be independently connected to internally-generated signals for test, temperature, and lead-off detection. Any configuration of input channels can be selected for derivation of the right leg drive (RLD) output signal. The ADS1191/2 operate at data rates up to 8 kSPS. Lead-off detection can be implemented internal to the device, using the device internal excitation current sink/source.
The devices are packaged in a 5-mm x 5-mm, 32-pin thin quad flat pack (TQFP). Operating temperature is specified from -40°C to 85°C.

Features
Two low-noise PGAs and two high-resolution ADCs (ADS1192)
Low power: 335 μW/channel
Input-referred noise: 24 µVpp (150-Hz BW, G = 6)
Input bias current: 1 nA
Data rate: 125 SPS to 8 KSPS
CMRR: -95 dB
Programmable gain: 1, 2, 3, 4, 6, 8, or 12
Supplies: unipolar or bipolar
Analog: 2.7 V to 5.25 V
Digital: 1.7 V to 3.6 V
Built-in right leg drive amplifier, lead-off detection, test signals
Built-in oscillator and reference
Flexible power-down, standby mode
SPI-compatible serial interface

Applications
Medical instrumentation (ECG) including:
Patient monitoring; Holter, event, stress, and vital signs including ECG, AED, telemedicine
Sports and fitness (heart rate, respiration, and ECG)