ADS1292 Complete Low-Power Integrated Analog Front End (AFE) for ECG Applications | TI.com

ADS1292 (ACTIVE)

Complete Low-Power Integrated Analog Front End (AFE) for ECG Applications

Complete Low-Power Integrated Analog Front End (AFE) for ECG Applications - ADS1292
 

Special note

See how the ADS1292 and other TI products combine to create a unique Wireless Body Sensor solution

Description

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

Features

  • 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: –105 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

View more

Parametrics Compare all products in Precision ADCs (<=10MSPS)

 
Resolution (Bits)
Sample Rate (Max) (kSPS)
# Input Channels
Interface
Operating Temperature Range (C)
Package Group
Approx. Price (US$)
Power Consumption (Typ) (mW)
Package Size: mm2:W x L (PKG)
Architecture
Input Type
Multi-Channel Configuration
Reference Mode
Features
Input Range (Max) (V)
Input Range (Min) (V)
Analog Voltage AVDD (Min) (V)
Analog Voltage AVDD (Max) (V)
Digital Supply (Min) (V)
Digital Supply (Max) (V)
INL (Max) (+/-LSB)
SNR (dB)
THD (Typ) (dB)
Rating
Sample Rate (Max) (MSPS)
ADS1292 ADS1191 ADS1192 ADS1291 ADS1292R ADS1293 ADS1294
24     16     16     24     24     24     24    
8     8     8     8     8     25.6     32    
2     1     2     1     2     3     4    
SPI     SPI     SPI     SPI     SPI     SPI     SPI    
-40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -20 to 85     -40 to 85
0 to 70    
TQFP | 32
VQFN | 32    
TQFP | 32
VQFN | 32    
TQFP | 32
VQFN | 32    
TQFP | 32
VQFN | 32    
TQFP | 32
VQFN | 32    
WQFN | 28     NFBGA | 64
TQFP | 64    
4.65 | 1ku     2.95 | 1ku     3.85 | 1ku     3.75 | 1ku     4.85 | 1ku     6.50 | 1ku     11.35 | 1ku    
0.7     0.335     0.67     0.35     0.7     0.9     3    
32TQFP: 49 mm2: 7 x 7 (TQFP | 32)
32VQFN: 16 mm2: 4 x 4 (VQFN | 32)    
32TQFP: 49 mm2: 7 x 7 (TQFP | 32)
32VQFN: 16 mm2: 4 x 4 (VQFN | 32)    
32TQFP: 49 mm2: 7 x 7 (TQFP | 32)
32VQFN: 16 mm2: 4 x 4 (VQFN | 32)    
32TQFP: 49 mm2: 7 x 7 (TQFP | 32)
32VQFN: 16 mm2: 4 x 4 (VQFN | 32)    
32TQFP: 49 mm2: 7 x 7 (TQFP | 32)
32VQFN: 16 mm2: 4 x 4 (VQFN | 32)    
28WQFN: 25 mm2: 5 x 5 (WQFN | 28)     64NFBGA: 64 mm2: 8 x 8 (NFBGA | 64)
64TQFP: 144 mm2: 12 x 12 (TQFP | 64)    
Delta-Sigma     Delta-Sigma     Delta-Sigma     Delta-Sigma     Delta-Sigma     Delta-Sigma     Delta-Sigma    
Differential
Single-Ended    
Differential
Single-Ended    
Differential
Single-Ended    
Differential
Single-Ended    
Differential
Single-Ended    
Differential     Differential
Single-Ended    
Simultaneous Sampling     N/A     Simultaneous Sampling     N/A     Simultaneous Sampling     Simultaneous Sampling     Simultaneous Sampling    
Int
Ext    
Int
Ext    
Int
Ext    
Int
Ext    
Int
Ext    
Int     Int
Ext    
Daisy-Chainable
GPIO
Oscillator
PGA    
Daisy-Chainable
GPIO
Oscillator
PGA    
Daisy-Chainable
GPIO
Oscillator
PGA    
Daisy-Chainable
GPIO
Oscillator
PGA    
Daisy-Chainable
GPIO
Oscillator
PGA    
Oscillator     Daisy-Chainable
GPIO
Oscillator
PGA    
5.25     5.25     5.25     5.25     5.25     0.4     5.25    
0     0     0     0     0     0     0    
2.7     2.7     2.7     2.7     2.7     2.7     2.7