Datasheet AD8226 (Analog Devices)

Wide Supply Range, Rail-to-Rail Output Instrumentation Amplifier Data Sheet AD8226 FEATURES PIN CONFIGURATION Gain set with 1 external resistor AD8226 Gain range: 1 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
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TOP VIEW
6-
(Not to Scale)
03
Dual supplies: ±1.35 V to ±18 V
07
Bandwidth (G = 1): 1.5 MHz
Figure 1.
CMRR (G = 1): 90 dB minimum for BR models Input noise: 22 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 AD8235/
Multichannel systems
AD8236 1 Visit www.analog.com for the latest instrumentation amplifiers.
GENERAL DESCRIPTION
The AD8226 is a low cost, wide supply range instrumentation AD8226 can handle voltages beyond the rails. For example, amplifier that requires only one external resistor to set any gain with a ±5 V supply, the part is guaranteed to withstand ±35 V between 1 and 1000. at the input with no damage. Minimum as well as maximum The AD8226 is designed to work with a variety of signal input bias currents are specified to facilitate open wire detection. voltages. A wide input range and rail-to-rail output allow the The AD8226 is perfect for multichannel, space-constrained signal to make full use of the supply rails. Because the input industrial applications. Unlike other low cost, low power range also includes the ability to go below the negative supply, instrumentation amplifiers, the AD8226 is designed with small signals near ground can be amplified without requiring dual a minimum gain of 1 and can easily handle ±10 V signals. supplies. The AD8226 operates on supplies ranging from ±1.35 V With its MSOP package and 125°C temperature rating, the to ±18 V for dual supplies and 2.2 V to 36 V for single supply. AD8226 thrives in tightly packed, zero airflow designs. The robust AD8226 inputs are designed to connect to real- The AD8226 is available in 8-lead MSOP and SOIC packages, world sensors. In addition to its wide operating range, the and is fully specified for −40°C to +125°C operation. For a device with a similar package and performance as the AD8226 but with gain settable from 5 to 1000, consider using the AD8227.
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Document Outline FEATURES APPLICATIONS PIN CONFIGURATION GENERAL DESCRIPTION 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 Performance Across Temperature Recommendation for Best Performance 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