Datasheet ADA4638-1 (Analog Devices)

30 V Zero-Drift, Rail-to-Rail Output Precision Amplifier Data Sheet ADA4638-1 FEATURES PIN CONFIGURATIONS Single supply operation: 4.5 V to 30 V ADA4638-1 Dual supply operation: ±2.25 V to ±15 V NC 1 8 NC Low offset voltage: 4 μV maximum –IN 2 7 V+ TOP VIEW +IN 3 (Not to Scale) 6 OUT Input offset voltage drift: 0.05 μV/°C maximum V– 4 5 NC High gain: 130 dB minimum High PSRR: 120 dB minimum NOTES
1
1. NC = NO CONNECT. DO NOT
-00
High CMRR: 130 dB minimum
72
CONNECT TO THIS PIN.
100
Input common-mode range includes lower supply rail
Figure 1. 8-Lead SOIC
Rail-to-rail output ADA4638-1 Low supply current: 0.95 mA maximum NC 1 8 NC APPLICATIONS –IN 2 TOP VIEW 7 V+ (Not to Scale) Electronic weigh scale +IN 3 6 OUT Pressure and position sensors V– 4 5 NC Strain gage amplifiers NOTES Medical instrumentation 1. NC = NO CONNECT. DO NOT CONNECT TO THIS PIN.
0202-
2. IT IS RECOMMENDED THAT THE EXPOSED PAD BE Thermocouple amplifiers
07
CONNECTED TO V–.
10 Figure 2. 8-Lead LFCSP
GENERAL DESCRIPTION
The ADA4638-1 is a high voltage, high precision, zero-drift
Table 1. Analog Devices, Inc., Zero-Drift Op Amp Portfolio
amplifier featuring rail-to-rail output swing. It is guaranteed to
Offset Offset
operate from 4.5 V to 30 V single supply or ±2.25 V to ±15 V
Operating Voltage Voltage Drift
dual supplies while consuming less than 0.95 mA of supply
Voltage Type Product (μV) Max (μV/°C) Max
current at ±5 V. 30 V Single ADA4638-1 4.5 0.08 With an offset voltage of 4 μV, offset drift less than 0.05 μV/°C, 16 V Single AD8638 9 0.06 no 1/f noise, and input voltage noise of only 1.2 μV p-p (0.1 Hz Dual AD8639 9 0.06 to 10 Hz), the ADA4638-1 is suited for high precision applications 5 V Single ADA4528-1 2.5 0.015 where large error sources cannot be tolerated. Pressure sensors, AD8628 5 0.02 medical equipment, and strain gage amplifiers benefit greatly AD8538 13 0.1 from nearly zero drift over the wide operating temperature ADA4051-1 15 0.1 range. Many applications can take advantage of the rail-to-rail Dual AD8629 5 0.02 output swing provided by the ADA4638-1 to maximize the signal- AD8539 13 0.1 to-noise ratio (SNR). ADA4051-2 15 0.1 The ADA4638-1 is specified for the extended industrial (−40°C Quad AD8630 5 0.02 to +125°C) temperature range and is available in 8-lead LFCSP (3 mm × 3 mm) and SOIC packages.
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Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ELECTRICAL CHARACTERISTICS—30 V OPERATION ELECTRICAL CHARACTERISTICS—10 V OPERATION ELECTRICAL CHARACTERISTICS—5 V OPERATION ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION TYPICAL PERFORMANCE CHARACTERISTICS APPLICATIONS INFORMATION DIFFERENTIATION THEORY OF OPERATION INPUT PROTECTION NO OUTPUT PHASE REVERSAL NOISE CONSIDERATIONS 1/f Noise COMPARATOR OPERATION PRECISION LOW-SIDE CURRENT SHUNT SENSOR PRINTED CIRCUIT BOARD LAYOUT OUTLINE DIMENSIONS ORDERING GUIDE