PGA280 Datasheet, PDF (1/46 Pages) Texas Instruments – Zero-Drift High-Voltage Programmable Gain INSTRUMENTATION AMPLIFIER

PGA280
PGA280
www.ti.com................................................................................................................................................ SBOS487A – JUNE 2009 – REVISED SEPTEMBER 2009
Zerø-Drift, High-Voltage,
Programmable Gain INSTRUMENTATION AMPLIFIER
Check for Samples: PGA280
FEATURES
1
•23 WIDE INPUT RANGE: ±15.5V at ±18V SUPPLY
• BINARY GAIN STEPS: 128V/V to 1/8V/V
• ADDITIONAL SCALING FACTOR: 1V/V and
1⅜V/V
• LOW OFFSET VOLTAGE: 3μV at G = 128
• NEAR-ZERO LONG-TERM DRIFT OF OFFSET
VOLTAGE
• NEAR-ZERO GAIN DRIFT: 0.5ppm/°C
• EXCELLENT LINEARITY: 1.5ppm
• EXCELLENT CMRR: 140dB
• HIGH INPUT IMPEDANCE
• VERY LOW 1/f NOISE
• DIFFERENTIAL SIGNAL OUTPUT
• OVERLOAD DETECTION
• INPUT CONFIGURATION SWITCH MATRIX
• WIRE BREAK TEST CURRENT
• EXPANDABLE SPI™ WITH CHECKSUM
• GENERAL-PURPOSE I/O PORT
• TSSOP-24 PACKAGE
APPLICATIONS
• HIGH-PRECISION SIGNAL INSTRUMENTATION
• MULTIPLEXED DATA ACQUISITION
• HIGH-VOLTAGE ANALOG INPUT AMPLIFIER
• UNIVERSAL INDUSTRIAL ANALOG INPUT
DESCRIPTION
The PGA280 is a high-precision instrumentation
amplifier with digitally-controllable gain and signal
integrity test capability. This device offers low offset
voltage, near-zero offset and gain drift, excellent
linearity, and nearly no 1/f noise with superior
common-mode and supply rejection to support
high-resolution precision measurement. The 36V
supply capability and wide, high-impedance input
range comply with requirements for universal signal
measurement.
Special circuitry prevents inrush currents from
multiplexer (MUX) switching. In addition, the input
switch matrix enables easy reconfiguration and
system-level diagnostics—overload conditions are
indicated.
The configurable general-purpose input/output
(GPIO) offers several control and communication
features. The SPI can be expanded to communicate
with more devices, supporting isolation with only four
ISO couplers. The PGA280 is available in a
TSSOP-24 package and is specified from –40°C to
+105°C.
RELATED PRODUCTS
FEATURES
23-bit resolution, ΔΣ analog-to-digital converter
Chopper-stabilized instrumentation amplifier,
RR I/O, 5V single-supply
High-precision PGA, G = 1, 10, 100, 1000
High-precision PGA, JFET Input, G = 1, 2, 4, 8
PRODUCT
ADS1259
INA333
PGA204
PGA206
+15V
-15V
INP2
INN2
MUX
INP1
INN1
Switch
Matrix
and
100mA
Source
Sink and
Buffer
PGA280
Gain
Network
+5V
ADC
(ADS1259)
Control Register
Address
7xGPIO
SPI Interface
SPI
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.
SPI is a trademark of Motorola.
2
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 © 2009, Texas Instruments Incorporated