MAA725 Operational Amplifier TO-5

Description

MAA725 Operational Amplifier TO-5 The MAA725, also sold as μA725 and LM725 equivalents, is a precision instrumentation operational amplifier in a rugged TO‑5 metal can (TO‑99‑8) package. It supports a wide supply range up to ±22 V with extremely low input bias current (~2 nA typical) and high open-loop gain (≈3×10⁶), offering outstanding performance for low-noise sensor applications and precision analog systems. The TO‑5 can provides excellent thermal stability and compatibility with vintage or replacement boards using the classic metal-flanged package. Features Wide ±3 V to ±22 V supply voltage range. Ultra-low input bias current (~2 nA typical). High open-loop voltage gain (~3,000,000 V/V). Excellent common-mode rejection ratio (~120 dB). Low drift: ~0.6 µV/°C input offset drift. Hermetic TO‑5 (TO‑99‑8) metal can package for robust mechanical and thermal performance. Offset null capability and short-circuit protected outputs. Specification Absolute Maximum Ratings Parameter Symbol Limit Unit Supply Voltage U B ±3 to ±22 V Input Differential Voltage U ID ±22 Input Voltage (MAA725, B, C) U I ±20 Voltage between Pins 1 & 7 or 8 & 7 U 1/7 , U 8/7 ±0.5 Power Dissipation (T a < 75 °C) P tot 500 mW Operating Temperature T a −55 to +125 °C Storage Temperature T stg −65 to +150 Notes: Differential pulses up to 5 ms at 10% duty; for DC operation, the allowable differential input falls to ±5 V. For supply magnitude below ±22 V, reduce absolute input limits accordingly (e.g., at ±16 V supply, input limit is ±15 V; at ±5 V supply, input limit is ±4 V). Electrical Characteristics (T a = 25 °C, U B = ±15 V) Parameter Symbol Min. Typ. Max. Unit Input Offset Voltage (R S ≤ 10 kΩ) U I0 0.5 — 1 mV Input Offset Current I I0 2 — 20 nA Input Bias Current I B 53 — 100 Input Noise Voltage (effective) Δf = 10 Hz–15 kHz, R S = 10 kΩ U in ef — 1 — µV Input Resistance f = 1 kHz R I — 1.5 — MΩ Input Voltage Range U I ±13.5 — ±4 V Open-Loop Voltage Gain R L ≥ 2 kΩ, U O = ±10 V A u 1·10 6 — 3·10 6 Common-Mode Rejection Ratio R S ≤ 10 kΩ CMR 110 — 120 dB Supply Voltage Rejection R S ≤ 10 kΩ SVR 4 — 10 µV/V Maximum Output Voltage Swing R S ≥ 10 kΩ U OPP max ±12 — ±13.5 V Output Resistance f = 1 kHz R O — 150 — Ω Supply Current P 85 — 105 mW Dimensions Applications Precision sensor instrumentation (strain gauges, thermocouples). Analog signal conditioning in industrial and aerospace systems. Vintage and legacy precision amplifier replacement. Low-drift, low-noise analog front ends. Documents Datasheet

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