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.