ADS1194, ADS1196
ADS1198
www.ti.com
SBAS471C –APRIL 2010–REVISED NOVEMBER 2011
Low-Power, 8-Channel, 16-Bit Analog Front-End
for Biopotential Measurements
Check for Samples: ADS1194, ADS1196, ADS1198
With its high levels of integration and exceptional
1
FEATURES
performance, the ADS1194/6/8 family enables the
creation of scalable medical instrumentation systems
at significantly reduced size, power, and overall cost.
23
•
Eight Low-Noise PGAs and
Eight High-Resolution ADCs (ADS1198)
•
Low Power: 0.55mW/channel
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)
•
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
required
for
a
standard
12-lead
medical
electrocardiogram (ECG).
•
Built-In Right Leg Drive Amplifier, Lead-Off
Detection, WCT, Test Signals
Multiple ADS1194/6/8 devices can be cascaded in
high channel count systems in
configuration.
a
daisy-chain
•
•
•
•
•
Pace Detection Channel Select
Built-In Oscillator and Reference
Flexible Power-Down, Standby Mode
SPI™-Compatible Serial Interface
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.
Operating Temperature Range:
REF
0°C to +70°C
Test Signals and
Monitors
Reference
ADC1
ADC2
ADC3
ADC4
ADC5
ADC6
ADC7
ADC8
APPLICATIONS
SPI
A1
A2
A3
A4
A5
A6
A7
A8
•
Medical Instrumentation (ECG) including:
–
Patient monitoring; Holter, event, stress,
and vital signs Including ECG, AED,
Telemedicine
Oscillator
MUX
Control
–
Evoked audio potential (EAP), Sleep study
monitor
•
High-Precision, Simultaneous, Multichannel
Signal Acquisition
To Channel
DESCRIPTION
Wilson
Terminal
WCT
¼
¼
¼
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.
RLD
PACE
1
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.
2
SPI is a trademark of Motorola.
All other trademarks are the property of their respective owners.
3
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2010–2011, Texas Instruments Incorporated
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