Datasheet AMP03 (Analog Devices) - 6

AMP03 +V APPLICATIONS INFORMATION 0.1
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F
The AMP03 represents a versatile analog building block. In
(GROUND REFERENCE 2)
order to capitalize on the fast settling time, high slew rate, and high CMR, proper decoupling and grounding techniques must
AMP03 V
be employed. Figure 1 illustrates the use of 0.1 µF decoupling
V OUT = –VSIGNAL SIGNAL
capacitors and proper ground connections.
–V ECM MAINTAINING COMMON-MODE REJECTION 0.1
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F
In order to achieve the full common-mode rejection capability of the AMP03, the source impedance must be carefully con-
GROUND REFERENCE 1 GROUND REFERENCE 2
trolled. Slight imbalances of the source resistance will result in Figure 1. AMP03 Serves to Reject Common-Mode Volt- a degradation of dc CMR—even a 5 Ω imbalance will degrade ages in Instrumentation Systems. Common-Mode Volt- CMR by 20 dB. Also, the matching of the reactive source ages Occur Due to Ground Current Returns. VSIGNAL and impedance must be matched in order to preserve the CMRR ECM Must Be within the Common-Mode Range of AMP03. over frequency.
APPLICATION CIRCUITS +15V 0.1
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F AMP03 R1 R2 REF10 25k
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25k
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–IN E +5V OUT 1 E0 = E2 – E1 AMP03 –5V OUT +IN E2 R3 R4 25k
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25k
⍀ Figure 2. Precision Difference Amplifier. Rejects Common-Mode Signal = (E1 + E2)/2 by 100 dB Figure 5. ⴞ5 V Precision Voltage Reference
AMP03 E1 E0 = –E1 AMP03 E0 = E1 + E2 E1 E2
Figure 3. Precision Unity-Gain Inverting Amplifier Figure 6. Precision Summing Amplifier
+15V 0.1
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F R1 R2 +10V OUT REF10 AMP03 –10V OUT AMP03 E E 1 = E2 0 = (R2/R1+1) E 2 1 E2
Figure 4. ⴞ10 V Precision Voltage Reference Figure 7. Precision Summing Amplifier with Gain –6– REV. F Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM PIN CONNECTIONS SPECIFICATIONS WAFER TEST LIMITS ABSOLUTE MAXIMUM RATINGS ORDERING GUIDE DICE CHARACTERISTICS BURN-IN CIRCUIT SLEW RATE TEST CIRCUIT Typical Performance Characteristics APPLICATION CIRCUITS APPLICATIONS INFORMATION MAINTAINING COMMON-MODE REJECTION OUTLINE DIMENSIONS Revision History