Datasheet AMP01 (Analog Devices)

Low Noise, Precision Instrumentation Amplifier Data Sheet AMP01 FEATURES
Input offset voltage is very low (20 μV), which generally eliminates the external null potentiometer. Temperature changes
Low offset voltage: 50 μV maximum
have minimal effect on offset; TCV
Very low offset voltage drift: 0.3 μV/°C maximum
IOS is typically 0.15 μV/°C.
Low noise: 0.12 μV p-p (0.1 Hz to 10 Hz)
Excellent low frequency noise performance is achieved with a
Excellent output drive: ±10 V at ±50 mA
minimal compromise on input protection. The bias current is
Capacitive load stability: up to 1 μF
very low, less than 10 nA over the military temperature range.
Gain range: 0.1 to 10,000
High common-mode rejection of 130 dB, 16-bit linearity at a
Excellent linearity: 16-bit at G = 1000
gain of 1000, and 50 mA peak output current are achievable
High CMR: 125 dB minimum (G = 1000)
simultaneously. This combination takes the instrumentation
Low bias current: 4 nA maximum
amplifier one step further towards the ideal amplifier.
Can be configured as a precision op amp
AC performance complements the superb dc specifications. The
Output-stage thermal shutdown
AMP01 slews at 4.5 V/μs into capacitive loads of up to 15 nF, settles
Available in die form
in 50 μs to 0.01% at a gain of 1000, and boasts a healthy 26 MHz
GENERAL DESCRIPTION
gain bandwidth product. These features make the AMP01 ideal for high speed data acquisition systems. The AMP011 is a monolithic instrumentation amplifier designed for high-precision data acquisition and instrumen- The gain is set by the ratio of two external resistors over a range of tation applications. The design combines the conventional 0.1 to 10,000. A very low gain temperature coefficient of 10 ppm/°C features of an instrumentation amplifier with a high current is achievable over the whole gain range. Output voltage swing is output stage. The output remains stable with high capacitance guaranteed with three load resistances: 50 Ω, 500 Ω, and 2 kΩ. loads (1 μF), a unique ability for an instrumentation amplifier. Loaded with 500 Ω, the output delivers ±13.0 V minimum. A Consequently, the AMP01 can amplify low level signals for thermal shutdown circuit prevents destruction of the output transmission through long cables without requiring an output transistors during overload conditions. buffer. The output stage can be configured as a voltage or The AMP01 can also be configured as a high performance current generator. operational amplifier. In many applications, the AMP01 can be used in place of op amp/power buffer combinations.
FUNCTIONAL BLOCK DIAGRAM V+ VIOS NULL +VOP A1 OUTPUT 250Ω –IN –VOP 250Ω +IN Q1 Q2 REFERENCE R1 47.5kΩ R R3 G 47.5kΩ SENSE A2 A3 RS R2 V R4 OOS 2.5kΩ
4
NULL 2.5kΩ
-00 35
V–
143 Figure 1. 1 Protected under U.S. Patents 4,471,321 and 4,503,381.
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Document Outline FEATURES GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ELECTRICAL CHARACTERISTICS DICE CHARACTERISTICS WAFER TEST LIMITS (AMP01NBC) ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION INPUT AND OUTPUT OFFSET VOLTAGES INPUT BIAS AND OFFSET CURRENTS GAIN COMMON-MODE REJECTION ACTIVE GUARD DRIVE GROUNDING SENSE AND REFERENCE TERMINALS DRIVING 50 Ω LOADS HEATSINKING OVERVOLTAGE PROTECTION POWER SUPPLY CONSIDERATIONS APPLICATIONS CIRCUITS OUTLINE DIMENSIONS ORDERING GUIDE