ADS1299 Low-Noise, 8-Channel, 24-Bit Analog-to-Digital Converter for Biopotential Measurements | TI.com

ADS1299 (ACTIVE)

Low-Noise, 8-Channel, 24-Bit Analog-to-Digital Converter for Biopotential Measurements

 

Description

The ADS1299-4, ADS1299-6, and ADS1299 devices are a family of four-, six-, and eight-channel, low-noise, 24-bit, simultaneous-sampling delta-sigma (ΔΣ) analog-to-digital converters (ADCs) with a built-in programmable gain amplifier (PGA), internal reference, and an onboard oscillator. The ADS1299-x incorporates all commonly-required features for extracranial electroencephalogram (EEG) and electrocardiography (ECG) applications. With its high levels of integration and exceptional performance, the ADS1299-x enables the creation of scalable medical instrumentation systems at significantly reduced size, power, and overall cost.

The ADS1299-x has 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 patient bias output signal. Optional SRB pins are available to route a common signal to multiple inputs for a referential montage configuration. The ADS1299-x operates at data rates from 250 SPS to 16 kSPS. Lead-off detection can be implemented internal to the device using an excitation current sink or source.

Multiple ADS1299-4, ADS1299-6, or ADS1299 devices can be cascaded in high channel count systems in a daisy-chain configuration. The ADS1299-x is offered in a TQFP-64 package specified from –40°C to +85°C.

Features

  • Up to Eight Low-Noise PGAs and Eight High-Resolution Simultaneous-Sampling ADCs
  • Input-Referred Noise: 1 µVPP (70-Hz BW)
  • Input Bias Current: 300 pA
  • Data Rate: 250 SPS to 16 kSPS
  • CMRR: –110 dB
  • Programmable Gain: 1, 2, 4, 6, 8, 12, or 24
  • Unipolar or Bipolar Supplies:
    • Analog: 4.75 V to 5.25 V
    • Digital: 1.8 V to 3.6 V
  • Built-In Bias Drive Amplifier,
    Lead-Off Detection, Test Signals
  • Built-In Oscillator
  • Internal or External Reference
  • Flexible Power-Down, Standby Mode
  • Pin-Compatible with the ADS129x
  • 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)
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)
SNR (dB)
THD (Typ) (dB)
Rating
ADS1299 ADS1299-4 ADS1299-6
24     24     24    
16     16     16    
8     4     6    
SPI     SPI     SPI    
-40 to 85     -40 to 85     -40 to 85    
TQFP | 64     TQFP | 64     TQFP | 64    
36.00 | 1ku     18.00 | 1ku     27.00 | 1ku    
41     5     5    
64TQFP: 144 mm2: 12 x 12 (TQFP | 64)     64TQFP: 144 mm2: 12 x 12 (TQFP | 64)     64TQFP: 144 mm2: 12 x 12 (TQFP | 64)    
Delta-Sigma     Delta-Sigma     Delta-Sigma    
Differential     Differential     Differential    
Simultaneous Sampling     Simultaneous Sampling     Simultaneous Sampling    
Ext
Int    
Ext
Int    
Ext
Int    
Daisy-Chainable
GPIO
Oscillator
PGA    
Daisy-Chainable
GPIO
Oscillator
PGA    
Daisy-Chainable
GPIO
Oscillator
PGA    
5.25     5.25     5.25    
0     0     0    
4.75     4.75     4.75    
5.25     5.25     5.25    
1.8     1.8     1.8    
3.6     3.6     3.6    
121     121     121    
-99     -99     -99    
Catalog     Catalog     Catalog