Datasheet AD8227 (Analog Devices)

Wide Supply Range, Rail-to-Rail Output Instrumentation Amplifier AD8227 FEATURES PIN CONFIGURATION Gain set with 1 external resistor AD8227 Gain range: 5 to 1000 –IN 1 8 +VS Input voltage goes below ground RG 2 7 VOUT Inputs protected beyond supplies RG 3 6 REF Very wide power supply range +IN 4 5 –VS
1
Single supply: 2.2 V to 36 V TOP VIEW
00 9-
(Not to Scale)
75 07
Dual supply: ±1.5 V to ±18 V Bandwidth (G = 5): 250 kHz
Figure 1.
CMRR (G = 5): 100 dB minimum (B Grade) Input noise: 24 nV/√Hz Typical supply current: 350 μA Table 1. Instrumentation Amplifiers by Category1 Specified temperature: −40°C to +125°C General Zero Military Low High Speed 8-lead SOIC and MSOP packages Purpose Drift Grade Power PGA
AD8220 AD8231 AD620 AD627 AD8250
APPLICATIONS
AD8221 AD8290 AD621 AD623 AD8251
Industrial process controls
AD8222 AD8293 AD524 AD8223 AD8253
Bridge amplifiers
AD8224 AD8553 AD526 AD8226
Medical instrumentation
AD8228 AD8556 AD624 AD8227
Portable data acquisition
AD8295 AD8557
Multichannel systems
1 See www.analog.com for the latest selection of instrumentation amplifiers.
GENERAL DESCRIPTION
The AD8227 is a low cost, wide supply range instrumentation The AD8227 is ideal for multichannel, space-constrained amplifier that requires only one external resistor to set any gain applications. With its MSOP package and 125°C temperature between 5 and 1000. rating, the AD8227 thrives in tightly packed, zero airflow designs. The AD8227 is designed to work with a variety of signal voltages. The AD8227 is available in 8-pin MSOP and SOIC packages. A wide input range and rail-to-rail output allow the signal to It is fully specified for −40°C to +125°C operation. make full use of the supply rails. Because the input range can For a similar instrumentation amplifier with a gain range of 1 to also go below the negative supply, small signals near ground can 1000, see the AD8226. be amplified without requiring dual supplies. The AD8227 operates on supplies ranging from ±1.5 V to ±18 V (2.2 V to 36 V single supply). The robust AD8227 inputs are designed to connect to real- world sensors. In addition to its wide operating range, the AD8227 can handle voltages beyond the rails. For example, with a ±5 V supply, the part is guaranteed to withstand ±35 V at the input with no damage. Minimum as well as maximum input bias currents are specified to facilitate open wire detection.
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Document Outline FEATURES APPLICATIONS PIN CONFIGURATION GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION ARCHITECTURE GAIN SELECTION REFERENCE TERMINAL INPUT VOLTAGE RANGE LAYOUT Common-Mode Rejection Ratio over Frequency Power Supplies References INPUT BIAS CURRENT RETURN PATH INPUT PROTECTION RADIO FREQUENCY INTERFERENCE (RFI) APPLICATIONS INFORMATION DIFFERENTIAL DRIVE Tips for Best Differential Output Performance PRECISION STRAIN GAGE DRIVING AN ADC OUTLINE DIMENSIONS ORDERING GUIDE