OP37GSZ vs OP37GSZ-REEL7 vs OPA37GU Comparison

The OP37GSZ is a Low Noise Precision High Speed Operational Amplifier optimized for circuits with gains greater than five. This design change increases slew rate to 17V/ms and gain-bandwidth product to 63MHz. It provides the low offset and drift of the OP07 plus higher speed and lower noise. Offsets down to 25µV and a maximum drift of 0.6µV/°C make it ideal for precision instrumentation applications. The low input bias current of 10nA and offset current of 7nA are achieved by using a bias-current cancellation circuit. The output stage has good load driving capability. A guaranteed swing of 10V into 600W and low output distortion make the OP37 an excellent choice for professional audio applications. These characteristics, coupled with long-term drift of 0.2mV/month, allow the circuit designer to achieve performance levels previously attained only by discrete designs. High-volume production of the OP37 is achieved by using on-chip zener-zap trimming.

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Low noise (80nVp-p (0.1 to 10Hz), 3nV/√Hz at 1kHz)

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Low drift (0.2µV/°C)

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High speed

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Low input offset voltage (10µV)

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Excellent CMRR (126dB)

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High open-loop gain (1.8 million)

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Available in die form

Product Details The OP37 provides the same high performance as the OP27, but the design is optimized for circuits with gains greater than five. This design change increases slew rate to 17V/µsec and gain-bandwidth product to 63MHz. The OP37 provides the low offset and drift of the OP07 plus higher speed and lower noise. Offsets down to 25µV and drift of 0.6µV/°C maximum make the OP-37 ideal for precision instrumentation applications. Exceptionally low noise (en=3.5nV/Hz at 10Hz), a low 1/f noise corner frequency of 2.7Hz, and the high gain of 1.8 million, allow accurate high-gain amplification of low-level signals. The low input bias current of ±10nA and offset current of 7nA are achieved by using a bias-current-cancellation circuit. Over the military temperature range this typically holds IB and IOS to ±20nA and 15nA respectively. The output stage has good load driving capability. A guaranteed swing of ±10V into 600 Ohm and low output distortion make the OP37 an excellent choice for professional audio applications. ### Features and Benefits

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Low Noise, 80 nV p-p (0.1 Hz to 10 Hz)

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Low Drift, 0.2 µV/°C

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High Speed, 17 V/µs Slew Rate

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Low Input Offset Voltage, 10 µV

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Excellent CMRR, 126 dB

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High Open-Loop Gain, 1.8 Million

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Replaces 725, OP-07,

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Available in Die Form

The OPA37GU is a single ultra-low noise high-precision monolithic Operational Amplifier for use with radiation hard equipment. Laser-trimmed thin-film resistors provide excellent long-term voltage offset stability and allow superior voltage offset compared to common zener-zap techniques. An unique bias current cancellation circuit allows bias and offset current specifications to be met over the full -40 to +85°C temperature range. The decompensated OPA37 requires a closed-loop gain 5.

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4.5nV/√Hz at 1kHz Maximum low noise

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100µV Maximum low offset

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0.4µV/°C Low drift

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117dB Minimum high open-loop gain

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100dB Minimum high common-mode rejection

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94dB Minimum high power-supply rejection

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Green product and no Sb/Br