ADS1293 Complete Low-Power Integrated Analog Front End for ECG Applications | TI.com

ADS1293 (ACTIVE)

Complete Low-Power Integrated Analog Front End for ECG Applications

Complete Low-Power Integrated Analog Front End for ECG Applications - ADS1293
 

Description

The ADS1293 incorporates all features commonly required in portable, low-power medical, sports, and fitness electrocardiogram (ECG) applications. With high levels of integration and exceptional performance, the ADS1293 enables the creation of scalable medical instrumentation systems at significantly reduced size, power, and overall cost.

The ADS1293 features three high-resolution channels capable of operating up to 25.6 ksps. Each channel can be independently programmed for a specific sample rate and bandwidth allowing users to optimize the configuration for performance and power. All input pins incorporate an EMI filter and can be routed to any channel through a flexible routing switch. Flexible routing also allows independent lead-off detection, right-leg drive, and Wilson/Goldberger reference terminal generation without the need to reconnect leads externally. A fourth channel allows external analog pace detection for applications that do not use digital pace detection.

The ADS1293 incorporates a self-diagnostics alarm system to detect when the system is out of the operating conditions range. Such events are reported to error flags. The overall status of the error flags is available as a signal on a dedicated ALARMB pin.

The device is packaged in a 5-mm × 5-mm × 0.8-mm, 28-pin LLP. Operating temperature ranges from –20°C to 85°C.

Features

  • Three High-Resolution Digital ECG Channels With
    Simultaneous Pace Output
  • EMI-Hardened Inputs
  • Low Power: 0.3 mW/channel
  • Input-Referred Noise: 7 µVpp (40-Hz Bandwidth)
  • Input Bias Current: 175 pA
  • Data Rate: Up to 25.6 ksps
  • Differential Input Voltage Range: ±400 mV
  • Analog Supply Voltage: 2.7 V to 5.5 V
  • Digital I/O Supply Voltage: 1.65 V to 3.6 V
  • Right-Leg Drive Amplifier
  • AC and DC Lead-Off Detection
  • Wilson and Goldberger Terminals
  • ALARMB Pin for Interrupt Driven Diagnostics
  • Battery Voltage Monitoring
  • Built-In Oscillator and Reference
  • Flexible Power-Down and Standby Modes

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

 
Resolution (Bits)
Sample Rate (Max) (kSPS)
Number of 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)
ADS1293 ADS1192 ADS1292 ADS1292R ADS1294
24     16     24     24     24    
25.6     8     8     8     32    
3     2     2     2     4    
SPI     SPI     SPI     SPI     SPI    
-20 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85
0 to 70    
WQFN | 28     TQFP | 32
VQFN | 32    
TQFP | 32
VQFN | 32    
TQFP | 32
VQFN | 32    
NFBGA | 64
TQFP | 64    
6.50 | 1ku     3.85 | 1ku     4.65 | 1ku     4.85 | 1ku     11.35 | 1ku    
0.9     0.67     0.7     0.7     3    
28WQFN: 25 mm2: 5 x 5 (WQFN | 28)     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)    
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    
Differential     Differential
Single-Ended    
Differential
Single-Ended    
Differential
Single-Ended    
Differential
Single-Ended    
Simultaneous Sampling     Simultaneous Sampling     Simultaneous Sampling     Simultaneous Sampling     Simultaneous Sampling    
Int     Int
Ext    
Int
Ext    
Int
Ext    
Int
Ext    
Oscillator     Daisy-Chainable
GPIO
Oscillator
PGA    
Daisy-Chainable
GPIO
Oscillator
PGA    
Daisy-Chainable
GPIO
Oscillator
PGA    
Daisy-Chainable
GPIO
Oscillator
PGA    
0.4     5.25     5.25     5.25     5.25    
0     0     0     0     0    
2.7     2.7     2.7     2.7     2.7    
5.5     5.25     5.25     5.25     5.25    
1.65     1.7     1.7     1.7     1.65    
3.6     3.6     3.6     3.6     3.6    
  1     2     2     8    
  92     107     107     112    
  -100     -104     -104     -98    
Catalog     Catalog     Catalog     Catalog     Catalog    
0.0256     0.008