Datasheet AD8228 (Analog Devices)

Low Gain Drift Precision Instrumentation Amplifier AD8228 FEATURES CONNECTION DIAGRAM Easy to use –IN 1 8 +VS Pin strappable gains of 10 and 100 G1 2 7 VOUT Wide power supply range: ±2.3 V to ±18 V G2 3 6 REF DC specifications (B Grade, G = 10) +IN 4 5 –VS 2 ppm/°C gain drift AD8228
01 0
0.02% gain error TOP VIEW
5-
(Not to Scale)
03 07
50 μV maximum input offset voltage
Figure 1.
0.8 μV/°C maximum input offset drift 0.6 nA maximum input bias current 100 dB CMRR AC specifications 650 kHz, –3 dB bandwidth (G = 10) 2 V/μs slew rate Low noise 8 nV/√Hz, @ 1 kHz (G = 100) 0.3 μV p-p from 0.1 Hz to 10 Hz (G = 100) APPLICATIONS Table 1. Instrumentation Amplifiers by Category General Zero Military Low High Speed Weigh scales Purpose Drift Grade Power PGA Industrial process controls
AD82201 AD82311 AD620 AD6271 AD8250
Bridge amplifiers
AD8221 AD85531 AD621 AD6231 AD8251
Precision data acquisition systems
AD8222 AD85551 AD524 AD8253
Medical instrumentation
AD82241 AD85561 AD526
Strain gages
AD8228 AD85571 AD624
Transducer interfaces
1 Rail-to-rail output.
GENERAL DESCRIPTION
The AD8228 is a high performance instrumentation amplifier The AD8228 operates on both single and dual supplies. Because with very high gain accuracy. Because all gain setting resistors the part can operate on supplies up to ±18 V, it is well suited for are internal and laser trimmed, gain accuracy and gain drift applications where high common-mode input voltages are are better than can be achieved with typical instrumentation encountered. The AD8228 is available in 8-lead MSOP and amplifiers. SOIC packages. Low voltage offset, low offset drift, low gain drift, high gain Performance is specified over the entire industrial temperature accuracy, and high CMRR make this part an excellent choice range of −40°C to +85°C for all grades. Furthermore, the AD8228 in applications that demand the best dc performance possible, is operational from −40°C to +125°C. For a pin-compatible ampli- such as bridge signal conditioning. fier with similar specifications, but with a gain range of 1 to 1000, see the AD8221.
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Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION CONNECTION DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS GAIN = 10 GAIN = 100 ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION ARCHITECTURE SETTING THE GAIN COMMON-MODE INPUT VOLTAGE RANGE REFERENCE TERMINAL LAYOUT Common-Mode Rejection Ratio over Frequency Power Supplies References Input Bias Current Return Path INPUT PROTECTION Input Voltages Beyond the Rails Large Differential Voltages When G = 100 RADIO FREQUENCY INTERFERENCE (RFI) APPLICATIONS INFORMATION DIFFERENTIAL DRIVE PRECISION STRAIN GAGE DRIVING A DIFFERENTIAL ADC OUTLINE DIMENSIONS ORDERING GUIDE