Datasheet

Control
CLK
GPIOANDCONTROL
Oscillator
SPI
TestSignalsand
Monitors
SPI
PATIENTBIASANDREFERENCE
Reference
REF
ADC7
ADC8
ADC1
ADC2
ADC3
ADC4
ADC5
ADC6
A7
A8
A1
A2
A3
A4
A5
A6
MUX
INPUTS
¼
¼
ToChannel
ADS1299
www.ti.com
SBAS499A JULY 2012REVISED AUGUST 2012
Low-Noise, 8-Channel, 24-Bit Analog Front-End for Biopotential Measurements
Check for Samples: ADS1299
With its high levels of integration and exceptional
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FEATURES
performance, the ADS1299 enables the creation of
23
Eight Low-Noise PGAs and Eight High-
scalable medical instrumentation systems at
Resolution Simultaneous-Sampling ADCs
significantly reduced size, power, and overall cost.
Very Low Input-Referred Noise:
The ADS1299 has a flexible input multiplexer per
1.0 μV
PP
(70-Hz BW)
channel that can be independently connected to the
Low Power: 5 mW/channel
internally-generated signals for test, temperature, and
lead-off detection. Additionally, any configuration of
Input Bias Current: 300 pA
input channels can be selected for derivation of the
Data Rate: 250 SPS to 16 kSPS
patient bias output signal. The ADS1299 operates at
CMRR: –110 dB
data rates from 250 SPS to 16 kSPS. Lead-off
detection can be implemented internal to the device,
Programmable Gain: 1, 2, 4, 6, 8, 12, or 24
either with an external pull-up or pull-down resistor or
Unipolar or Bipolar Supplies:
an excitation current sink or source.
Analog: 4.75 V to 5.25 V
Multiple ADS1299 devices can be cascaded in high
Digital: 1.8 V to 3.6 V
channel count systems in a daisy-chain configuration.
Built-In Bias Drive Amplifier,
The ADS1299 is offered in a TQFP-64 package
Lead-Off Detection, Test Signals
specified from –40°C to +85°C.
Built-In Oscillator
Internal or External Reference
Flexible Power-Down, Standby Mode
Pin-Compatible with the ADS1298IPAG
SPI™-Compatible Serial Interface
Operating Temperature Range: –40°C to +85°C
APPLICATIONS
Medical Instrumentation (EEG and ECG)
Including:
EEG, Bispectral index (BIS), Evoked audio
potential (EAP), Sleep study monitor
High-Precision, Simultaneous, Multichannel
Signal Acquisition
DESCRIPTION
The ADS1299 is a low-noise, multichannel,
simultaneous-sampling, 24-bit, delta-sigma (ΔΣ)
analog-to-digital converter (ADC) with a built-in
programmable gain amplifier (PGA), internal
reference, and an onboard oscillator. The ADS1299
incorporates all commonly-required features for
electroencephalogram (EEG) applications.
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2SPI is a trademark of Motorola.
3All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2012, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.

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