Datasheet AD8290 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | G = 50, CMOS Sensor Amplifier with Current Excitation |
| Pages / Page | 21 / 1 — G = 50, CMOS Sensor Amplifier. with Current Excitation. AD8290. FEATURES. … |
| Revision | B |
| File Format / Size | PDF / 478 Kb |
| Document Language | English |
G = 50, CMOS Sensor Amplifier. with Current Excitation. AD8290. FEATURES. GENERAL DESCRIPTION
Text Version of Document
G = 50, CMOS Sensor Amplifier with Current Excitation AD8290 FEATURES GENERAL DESCRIPTION Supply voltage range: 2.6 V to 5.5 V
The AD8290 contains both an adjustable current source to
Low power
drive a sensor and a difference amplifier to amplify the signal
1.2 mA + 2× excitation current
voltage. The amplifier is set for a fixed gain of 50. The AD8290
0.5 μA shutdown current
is an excellent solution for both the drive and the sensing aspects
Low input bias current: ±100 pA
required for pressure, temperature, and strain gage bridges.
High CMRR: 120 dB
In addition, because the AD8290 operates with low power,
Space savings: 16-lead, 3.0 mm × 3.0 mm × 0.55 mm LFCSP
works with a range of low supply voltages, and is available in a
Excitation current
low profile package, it is suitable for drive/sense circuits in
300 μA to 1300 μA range
portable electronics as well.
Set with external resistor
The AD8290 is available in a lead free 3.0 mm × 3.0 mm × 0.55 mm package and is operational over the industrial
APPLICATIONS
temperature range of −40°C to +85°C.
Bridge and sensor drives Portable electronics FUNCTIONAL BLOCK DIAGRAM CFILTER ENBL RSET 11 6 5 3 VCC 2 13 10 GND 15 CBRIDGE 4 ADC ANTI- ALIASING 14 AD8290 V FILTER REF NC NC NC NC NC NC 1 7 8 9 12 16
1 00 5- 74 06 Figure 1.
Rev. B Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Tel: 781.329.4700 www.analog.com Trademarks and registered trademarks are the property of their respective owners. Fax: 781.461.3113 ©2007–2008 Analog Devices, Inc. All rights reserved.
Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION AMPLIFIER HIGH POWER SUPPLY REJECTION (PSR) AND COMMON-MODE REJECTION (CMR) 1/f NOISE CORRECTION CURRENT SOURCE APPLICATIONS INFORMATION TYPICAL CONNECTIONS CURRENT EXCITATION ENABLE/DISABLE FUNCTION OUTPUT FILTERING CLOCK FEEDTHROUGH MAXIMIZING PERFORMANCE THROUGH PROPER LAYOUT POWER SUPPLY BYPASSING DUAL-SUPPLY OPERATION PRESSURE SENSOR BRIDGE APPLICATION TEMPERATURE SENSOR APPLICATION ADC/MICROCONTROLLER OUTLINE DIMENSIONS ORDERING GUIDE
The AD8290 contains both an adjustable current source to
Low power
drive a sensor and a difference amplifier to amplify the signal
1.2 mA + 2× excitation current
voltage. The amplifier is set for a fixed gain of 50. The AD8290
0.5 μA shutdown current
is an excellent solution for both the drive and the sensing aspects
Low input bias current: ±100 pA
required for pressure, temperature, and strain gage bridges.
High CMRR: 120 dB
In addition, because the AD8290 operates with low power,
Space savings: 16-lead, 3.0 mm × 3.0 mm × 0.55 mm LFCSP
works with a range of low supply voltages, and is available in a
Excitation current
low profile package, it is suitable for drive/sense circuits in
300 μA to 1300 μA range
portable electronics as well.
Set with external resistor
The AD8290 is available in a lead free 3.0 mm × 3.0 mm × 0.55 mm package and is operational over the industrial
APPLICATIONS
temperature range of −40°C to +85°C.
Bridge and sensor drives Portable electronics FUNCTIONAL BLOCK DIAGRAM CFILTER ENBL RSET 11 6 5 3 VCC 2 13 10 GND 15 CBRIDGE 4 ADC ANTI- ALIASING 14 AD8290 V FILTER REF NC NC NC NC NC NC 1 7 8 9 12 16
1 00 5- 74 06 Figure 1.
Rev. B Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Tel: 781.329.4700 www.analog.com Trademarks and registered trademarks are the property of their respective owners. Fax: 781.461.3113 ©2007–2008 Analog Devices, Inc. All rights reserved.
Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION AMPLIFIER HIGH POWER SUPPLY REJECTION (PSR) AND COMMON-MODE REJECTION (CMR) 1/f NOISE CORRECTION CURRENT SOURCE APPLICATIONS INFORMATION TYPICAL CONNECTIONS CURRENT EXCITATION ENABLE/DISABLE FUNCTION OUTPUT FILTERING CLOCK FEEDTHROUGH MAXIMIZING PERFORMANCE THROUGH PROPER LAYOUT POWER SUPPLY BYPASSING DUAL-SUPPLY OPERATION PRESSURE SENSOR BRIDGE APPLICATION TEMPERATURE SENSOR APPLICATION ADC/MICROCONTROLLER OUTLINE DIMENSIONS ORDERING GUIDE
