1 Features

1• Two low-noise PGAs and two high-resolution

ADCs

(ADS1292 and ADS1292R)

• Low power: 335 μW/channel

• Input-referred noise: 8 μVPP

(150-Hz BW, G = 6)

• Input bias current: 200 pA

• Data rate: 125 SPS to 8 kSPS

• CMRR: 120 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

• Integrated respiration impedance measurement

(ADS1292R)

• Built-in oscillator and reference

• Flexible power-down, standby mode

• SPI™-compatible serial interface

• Operating temperature range: –40°C to +85°C

2 Applications

• Medical instrumentation (ECG) including:

– Patient monitoring: Holter, event, stress, and

vital signs including ECG, AED, and

telemedicine

– Personal care and fitness monitors

(heart rate, respiration, and ECG)

• High-precision, simultaneous, multichannel data

acquisition

3 Description

The ADS1291, ADS1292, and ADS1292R are

multichannel, simultaneous sampling, 24-bit, deltasigma

(ΔΣ) analog-to-digital converters (ADCs) with a

built-in programmable gain amplifier (PGA), internal

reference, and an onboard oscillator.

The ADS1291, ADS1292, and ADS1292R

incorporate all features commonly required in

portable, low-power medical electrocardiogram

(ECG), sports, and fitness applications.

With high levels of integration and exceptional

performance, the ADS1291, ADS1292, and

ADS1292R enable the creation of scalable medical

instrumentation systems at significantly reduced size,

power, and overall cost.

The ADS1291, ADS1292, and ADS1292R have a

flexible input multiplexer per channel that can be

independently connected to the internally-generated

signals for test, temperature, and lead-off detection.

Additionally, any configuration of input channels can

be selected for derivation of the right leg drive (RLD)

output signal. The ADS1291, ADS1292, and

ADS1292R operate at data rates up to 8 kSPS. Leadoff

detection can be implemented internal to the

device, using the device internal excitation current

sink or source. The ADS1292R version includes a

fully integrated respiration impedance measurement

function.

The devices are packaged in a 5-mm × 5-mm, 32-pin

thin quad flat pack (TQFP) and a 4-mm x 4-mm, 32-

pin quad flat pack with no leads (VQFN). Operating

temperature is specified from –40°C to +85°C.