Complete Low Power Integrated Analog Front End for ECG Applications - ADS1191

ADS1191 (ACTIVE)

Complete Low Power Integrated Analog Front End for ECG Applications

Description

The ADS1191/2 are a family of multichannel, simultaneous sampling, 16-bit, delta-sigma (ΔΣ) analog-to-digital converters (ADCs) with a built-in programmable gain amplifier (PGA), internal reference, and an onboard oscillator.

The ADS1191/2 incorporate all of the features that are commonly required in portable, low-power medical electrocardiogram (ECG), sports, and fitness applications.

With its high levels of integration and exceptional performance, the ADS1191/2 family enables the creation of scalable medical instrumentation systems at significantly reduced size, power, and overall cost.

The ADS1191/2 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 ADS1191/2 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 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 (ADS1192)
  • Low Power: 335 µW/channel
  • Input-Referred Noise: 24 µVPP
    (150-Hz BW, G = 6)
  • Input Bias Current: 1 nA
  • Data Rate: 125 SPS to 8 kSPS
  • CMRR: –95 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
  • 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 Medical Analog Front End

 
Resolution (Bits)
# Input Channels
Pin/Package
Sample Rate (max) (SPS)
Interface
Approx. Price (US$)
Reference Mode
Operating Temperature Range (C)
Architecture
# Input Channels
ADS1191 ADS1192 ADS1291 ADS1292 ADS1292R ADS1293 ADS1294 ADS1294R ADS1296 ADS1296R ADS1298 ADS1298R ADS1299
16     16     24     24     24     24     24     24     24     24     24     24     24    
1     2     1     2     2     3     4     4     6     6     8     8     8    
32TQFP
32VQFN    
32TQFP
32VQFN    
32TQFP
32VQFN    
32TQFP
32VQFN    
32TQFP
32VQFN    
28WQFN     64NFBGA
64TQFP    
64NFBGA     64NFBGA
64TQFP    
64NFBGA     64NFBGA
64TQFP    
64NFBGA     64TQFP    
8KSPS     8KSPS     8KSPS     8KSPS     8KSPS     25.6KSPS     32KSPS     32KSPS     32KSPS     32KSPS     32KSPS     32KSPS     16KSPS    
Serial SPI     Serial SPI     Serial SPI     Serial SPI     Serial SPI     Serial SPI     Serial SPI     Serial SPI     Serial SPI     Serial SPI     Serial SPI     Serial SPI     Serial SPI    
2.95 | 1ku     3.85 | 1ku     3.75 | 1ku     4.65 | 1ku     4.85 | 1ku     5.50 | 1ku     11.95 | 1ku     11.95 | 1ku     17.95 | 1ku     17.95 | 1ku     23.95 | 1ku     23.95 | 1ku     36.00 | 1ku    
Int
Ext    
Int
Ext    
Int
Ext    
Int
Ext    
Int
Ext    
Int     Int
Ext    
Int
Ext    
Int
Ext    
Int
Ext    
Int
Ext    
Int
Ext    
Int
Ext    
-40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -20 to 85     -40 to 85
0 to 70    
-40 to 85     -40 to 85
0 to 70    
-40 to 85     -40 to 85
0 to 70    
-40 to 85     -40 to 85    
Delta-Sigma     Delta-Sigma     Delta-Sigma     Delta-Sigma     Delta-Sigma     Delta-Sigma     Delta-Sigma     Delta-Sigma     Delta-Sigma     Delta-Sigma     Delta-Sigma     Delta-Sigma     Delta-Sigma    
1     2     1     2     2     3     4     4     6     6     8     8     8    

Related end equipment

  • Medical Instrumentation (ECG) including:
    • Patient monitoring; Holter, event, stress, and vital signs including ECG, AED, telemedicine
    • Sports and fitness (heart rate, respiration, and ECG)

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