Low-Noise, 8 Channel, 16 Bit Analog Front End for ECG/EEG Measurements - ADS1198

ADS1198 (ACTIVE)

Low-Noise, 8 Channel, 16 Bit Analog Front End for ECG/EEG Measurements

Description

The ADS1194/6/8 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.

With its high levels of integration and exceptional performance, the ADS1194/6/8 family enables the creation of scalable medical instrumentation systems at significantly reduced size, power, and overall cost.

The ADS1194/6/8 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 ADS1194/6/8 operate at data rates as high as 8kSPS, thereby allowing the implementation of software pace detection. Lead-off detection can be implemented internal to the device, either with a pull-up/pull-down resistor or an excitation current sink/source. Three integrated amplifiers generate the Wilson Center Terminal (WCT) and the Goldberger terminals (GCT) required for a standard 12-lead medical electrocardiogram (ECG).

Multiple ADS1194/6/8 devices can be cascaded in high channel count systems in a daisy-chain configuration.

Package options include a tiny 8mm × 8mm, 64-ball BGA and a TQFP-64. Both packages are specified over the temperature range of 0°C to +70°C.

Features

  • Eight Low-Noise PGAs and
    Eight High-Resolution ADCs (ADS1198)
  • Low Power: 0.55mW/channel
  • Input-Referred Noise:
    12µVPP (150Hz BW, G = 6)
  • Input Bias Current: 200pA
  • Data Rate: 125SPS to 8kSPS
  • CMRR: –105dB
  • Programmable Gain: 1, 2, 3, 4, 6, 8, or 12
  • Supports AAMI EC11, EC13, IEC60601-1, IEC60601-2-27, and IEC60601-2-51 Standards
  • Supplies: Unipolar or Bipolar
    • Analog: 2.7V to 5.25V
    • Digital: 1.65V to 3.6V
  • Built-In Right Leg Drive Amplifier, Lead-Off Detection, WCT, Test Signals
  • Pace Detection Channel Select
  • Built-In Oscillator and Reference
  • Flexible Power-Down, Standby Mode
  • SPI™-Compatible Serial Interface
  • Operating Temperature Range:
    0°C to +70°C

View more

Parametrics Compare all products in Medical Analog Front End

 
Resolution (Bits)
Sample Rate (max) (SPS)
# Input Channels
Reference Mode
Architecture
Interface
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
ADS1198 ADS1194 ADS1196 ADS1294 ADS1294R ADS1296 ADS1296R ADS1298 ADS1298R
16     16     16     24     24     24     24     24     24    
8KSPS     8KSPS     8KSPS     32KSPS     32KSPS     32KSPS     32KSPS     32KSPS     32KSPS    
8     4     6     4     4     6     6     8     8    
Int
Ext    
Int
Ext    
Int
Ext    
Int
Ext    
Int
Ext    
Int
Ext    
Int
Ext    
Int
Ext    
Int
Ext    
Delta-Sigma     Delta-Sigma     Delta-Sigma     Delta-Sigma     Delta-Sigma     Delta-Sigma     Delta-Sigma     Delta-Sigma     Delta-Sigma    
Serial SPI     Serial SPI     Serial SPI     Serial SPI     Serial SPI     Serial SPI     Serial SPI     Serial SPI     Serial SPI    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
0 to 70     0 to 70     0 to 70     -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    
64NFBGA
64TQFP    
64NFBGA
64TQFP    
64NFBGA
64TQFP    
64NFBGA
64TQFP    
64NFBGA     64NFBGA
64TQFP    
64NFBGA     64NFBGA
64TQFP    
64NFBGA    
14.35 | 1ku     7.80 | 1ku     11.35 | 1ku     11.95 | 1ku     11.95 | 1ku     17.95 | 1ku     17.95 | 1ku     23.95 | 1ku     23.95 | 1ku    

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