ADS1291
- 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
The ADS1291, ADS1292, and ADS1292R are multichannel, simultaneous sampling, 24-bit, delta-sigma (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. Lead-off 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.
Technical documentation
Type | Title | Date | ||
---|---|---|---|---|
* | Data sheet | ADS129x Low-Power, 2-Channel, 24-Bit Analog Front-End for Biopotential Measurements datasheet (Rev. C) | PDF | HTML | 24 Apr 2020 |
Application note | Calculating Conversion Latency and System Cycle Time for Delta-Sigma ADCs (Rev. A) | PDF | HTML | 18 Mar 2024 | |
Application note | QFN and SON PCB Attachment (Rev. C) | PDF | HTML | 06 Dec 2023 | |
Application note | Digital Filter Types in Delta-Sigma ADCs (Rev. A) | PDF | HTML | 29 Mar 2023 | |
E-book | Fundamentals of Precision ADC Noise Analysis | 19 Jun 2020 | ||
E-book | Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs | 19 Mar 2015 | ||
Application note | Understanding Lead-Off Detection in ECG (Rev. A) | 14 Jan 2015 | ||
Application note | Improving Common-Mode Rejection Using the Right-Leg Drive Amplifier | 06 Jul 2011 | ||
Application note | Respiration Rate Measurement Using Impedance Pneumography | 01 Mar 2011 | ||
Application note | Analog Front-End Design for ECG Systems Using Delta-Sigma ADCs (Rev. A) | 13 Apr 2010 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
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Supported products & hardware
Products
Precision op amps (Vos<1mV)
General-purpose op amps
Audio op amps
Transimpedance amplifiers
High-speed op amps (GBW ≥ 50 MHz)
Power op amps
Video amplifiers
Line drivers
Transconductance amplifiers & laser drivers
Fully differential amplifiers
Precision ADCs
Biosensing AFEs
High-speed ADCs (≥10 MSPS)
Receivers
Touchscreen controllers
Difference amplifiers
Instrumentation amplifiers
Audio line receivers
Analog current-sense amplifiers
Digital power monitors
Analog current-sense amplifiers with integrated shunt resistor
Digital power monitors with integrated shunt resistor
Die & wafer services
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
TIDM-BIOSIGNMONITOR — Multi-Parameter Bio-Signal Monitor Reference Design For Personal Monitoring
TIDA-00096 — Wireless Heart Monitor with Bluetooth Low Energy
Package | Pins | CAD symbols, footprints & 3D models |
---|---|---|
TQFP (PBS) | 32 | Ultra Librarian |
VQFN (RSM) | 32 | Ultra Librarian |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
- Fab location
- Assembly location
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