下载
Gain
15 V
VSN
G0 G1 G2 G3 G4 3 V
DVDD
EF
IN-P
IN-N
+15 V
VSP
VSOP
VO-P
VOCM
VO-N
PGA281
ADS1259
ADC
+5 V
VSON
A
1
A
2
A
3
PGA281
www.ti.com
SBOS664A –MARCH 2013–REVISED JUNE 2013
Precision, Zero-Drift, High-Voltage,
Programmable Gain Instrumentation Amplifier
Check for Samples: PGA281
1
FEATURES
DESCRIPTION
The PGA281 is a high-precision instrumentation
234
• Wide Input Range: ±15.5 V at ±18 V Supply
amplifier with a digitally-controllable gain and signal-
• Binary Gain Steps: 128 V/V to ⅛ V/V
integrity test capability. This device uses proprietary
• Additional Scaling Factor: 1 V/V and 1⅜ V/V
autozeroing techniques to offer low offset voltage,
near-zero offset and gain drift, excellent linearity, and
• Low Offset Voltage: 5 μV at G = 128
nearly no 1/f noise.
• Near-Zero Long-Term Drift of Offset Voltage
The PGA281 is optimized to provide an excellent
• Near-Zero Gain Drift: 0.5 ppm/°C
common-mode rejection of greater than 110 dB (G =
• Excellent Linearity: 1.5 ppm
1) over a wide frequency range. Superior common-
• Excellent CMRR: 140 dB
mode and supply rejection supports high-resolution,
precise measurement. The 36-V supply capability and
• High Input Impedance
wide, high-impedance input range comply with
• Very Low 1/f Noise
requirements for universal signal measurement.
• Differential Signal Output
The PGA281 offers multiple internal gain options from
• Overload Detection
⅛ V/V (attenuation) to 176 V/V, making this a
• TSSOP-16 Package
universal, high-performance, analog front-end
suitable for a wide variety of applications. The fully
differential, rail-to-rail output is designed to easily
APPLICATIONS
interface a wide range of input signals to the low-
• High-Precision Signal Instrumentation
voltage domain of high-resolution analog-to-digital
• Multiplexed Data Acquisition
converters (ADCs).
• Medical Instrumentation
The PGA281 is available in a TSSOP-16 package
• Test and Measurement Equipment
and is specified over a temperature range of –40°C to
+105°C.
• Differential or Single-Ended ADC Drivers
• Strain Gauge Amplifiers
RELATED PRODUCTS
• Industrial Process Control
PRODUCT FEATURES
ADS1259 23-bit resolution, ΔΣ analog-to-digital converter
Chopper-stabilized instrumentation amplifier,
INA333
RR I/O, 5-V single supply
PGA204 High-precision PGA; G = 1, 10, 100, and 1000
Zero-Drift, 36-V, PGA, SPI, GPIOs, input switch
PGA280
matrix
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.
2TINA-TI is a trademark of Texas Instruments.
3Bluetooth is a registered trademark of Bluetooth SIG, Inc.
4All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2013, 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.
页面指南
