AMP-01 GENERAL DESCRIPTION The AMP-01 is a monolithic instrumentation amplifier designed for high-precision data acquisition and instrumentation applications. The design combines the conventional features of an instrumentation amplifier with a high-current output stage. The output remains stable with high capacitance loads (14F), a unique ability for an instrumentation amplifier. Consequently, the AMP-01 can amplify low-level signals for transmission through long cables without requiring an output buffer.
AMP-01 ELECTRICAL CHARACTERISTICS at Vg = +15V, Rg = 10k, Ry = 2kQ), Ty = 25°C, unless otherwise noted.
AMP-01 TYPICAL PERFORMANCE CHARACTERISTICS INPUT OFFSET VOLTAGE vs TEMPERATURE OUTPUT OFFSET VOLTAGE CHANGE vs SUPPLY VOLTAGE INPUT OFFSET CURRENT vs TEMPERATURE 128 10 TEMPERATURE ) INPUT OFFSET VOLTAGE ) NUT VIES CURRENT (WA} COMMON-MODE RESECTION (98} INPUT OFFSET VOLTAGE vg SUPPLY VOLTAGE Tae POWER SUPPLY VOLTAGE (VOLTS) INPUT BIAS CURRENT vs TEMPERATURE 159 TEMPERATURE (D) COMMON-MODE REJECTION vs VOLTAGE GAIN g 1my T4 " 2PC VOLTAGE G, @ -5 NUT BIAS CURRENT fn} OUTPUT OFFSET VOLTAGE o) COMMANDER ERECTI
AMP-01 TYPICAL PERFORMANCE CHARACTERISTICS COMMODORE NPT VOLTAGE (volt S) OUTPUT VOLTAGE (VOLTS) VOLTAGE GAIN (68} COMMON-MODE VOLTAGE HANG vs TEMPERATURE Vo= g 18y 125 15 TEMPERATURE 00} MAXIMUM OUTPUT VOLTAGE vs LOAD RESISTANCE 0 00 " LOA RESISTANCE (13} CLOSED-LOOP VOLTAGE GAIN vs FREQUENCY oK Oik T FREQUENCY i) e 1] POWER SUPPLY REJECTION a PEAK-TO PEAK AMPLITUDE (VOLTS] TO% AL HARMONIC DISTORTION () POSITIVE PSR vs FREQUENCY Vs By Tar 258G RETIREE Y G1605 1 W ta 1ok FREQUENCY IHe) MAXIMUM OUTPUT SWING
AMP-01 TYPICAL PERFORMANCE CHARACTERISTICS LW RATE Wit NEGATIVE SUPPLY CURRENT fin) 5 SLEW RATE vs VOLTAGE GAIN g 115y VOLTAGE GAIN, G VOLTAGE NOISE DENSITY vs FREQUENCY FREQUENCY M) NEGATIVE SUPPLY CURRENT v8 SLIPPY VOLTAGE DOWER SUPPLY VOLTAGE WILTS) SLEW RATE v/l COLLAPSE HOUSE invite /T POSITIVE SUPPLY CURRENT i) SLEW RATE vs LOAD CAPACITANCE 1000 w LOAD CAPACITANCE (F) RTI VOLTAGE NOISE DENSITY vs GAIN Vg 18V VOLTAGE GAIN, 6 POSITIVE SUPPLY CURRENT vs TEMPERATURE TEMPERATURE 00t 5 56 75 100 125 150 POS
AMP-01 INPUT AND OUTPUT OFFSET VOLTAGES instrumentation amplifier have independent offset voltages associated with the input and output stages. While the initial offsets may be adjusted to ere, temperature variations will cause shifts in offsets. Systems with auto-zero can correct for offset errors, so initial adjustment wound be unnecessary. However, many high-gain applications don’t have auto zero. For these applications, both offsets can be bulled, which has minimal effect on TCVjog and TCVaos.
AMP-01 g 216V RESISTANCE VOLTAGE GAI R AND Rs SELECTION Gain accuracy is determined by the ratio accuracy of Rand Rg combined with the gain equation error of the AMP-1 {0.8% max for A/E grades). All instrumentation amplifiers require attention to layout so thermometric effects are minimized. Thermoplastic formed between copper and dissimilar metals car: easily destroy the TCVgs performance of the AMP-01 which is typically 0.15uV/° C.
AMP-01 i heavy output currents are expected and the load is situated some distance from the amplifier, voltage drops due to track or wig resistance will cause errors. Voltage drops are particularly troublesome when driving 504 loads. Under these conditions, the sense and reference terminals can be used to "remote sense” the load as shown in Figure 4. This method of connection puts the IXR drops inside the feedback loop and virtually eliminates the error.
AMP-01 to several hundred milliliters (for example, the 4-20mA current transmitter application, Figure 8). Excessive dissipation will cause thermal shutdown of the output stage thus protecting the device from damage. A heat sink is recommended in power applications to reduce the die temperature. Several appropriate headshrinker are available; the Thermally 60108 is especially easy to use and Is inexpensive. Intended for dual-in-line packages, the heat sink may be attached with & polyacrylamide adhesive.
NAP-01 KO NG Ry 220 By RG] Darryl iy 13000~ 10 T OG1008 00 = b Vst 200 pp INTO 5005 1 100055, TOTAL MARCONI DISTORTION: 2OV P @170 1000 0eF T 000 i By A Hmv o 1 lm&vF I T snare WORE BANDWIDTH §Sikhs FOAL HARMONIC DISTORTION 0007, B kHz. 200-p NTO 5001 77 100057 15v Imm Tm N _LcL A Figure 13. The inverting operational amplifier configuration has excellent linearity over the gain range 1 to 1000, typically 0.005%.
AMP-01 NOISE TEST CIRCUIT {0.