OPA1S2384 250-MHz, CMOS Transimpedance Amplifier (TIA) with Integrated Switch and Buffer | TI.com

This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
250-MHz, CMOS Transimpedance Amplifier (TIA) with Integrated Switch and Buffer



The OPA1S2384 and OPA1S2385 (OPA1S238x) combine high bandwidth, FET-input operational amplifiers with a fast SPST CMOS switch designed for applications that require the tracking and capturing of fast signals.

By providing a 250-MHz gain bandwidth product and rail-to-rail input/output swings in single-supply operation, the OPA1S238x is capable of wideband transimpedance gain and large output signal swing simultaneously. Low input bias current and voltage noise (6 nV/√Hz) make it possible to amplify extremely low-level input signals for maximum signal-to-noise ratio.

The characteristics of the OPA1S238x make this device ideally suited for use as a wideband photodiode amplifier.

In addition, the CMOS switch and subsequent buffer amplifier allow the OPA1S238x to be easily configured as a fast sample-and-hold circuit. The external hold capacitor and post-gain options make the OPA1S238x easily adoptable to a wide range of speed and accuracy requirements. Note that the OPA1S2384 closes the internal switch with a logic-high signal, and the OPA1S2385 closes the internal switch with a logic-low signal.

The OPA1S238x are optimized for low-voltage operation from as low as +2.7 V up to +5.5 V. These devices are specified for a temperature range of –40°C to +85°C.


  • Wide Bandwidth: 250 MHz
  • High Slew Rate: 150 V/µs
  • Rail-to-Rail Input/Output (I/O)
  • Fast Settling
  • Low Input Bias Current: 3 pA
  • High Input Impedance: 1013 Ω || 2 pF
  • SPST Switch:
    • Low On-Resistance: 4 Ω
    • Low Charge Injection: 1 pC
    • Low Leakage Current: 10 pA
  • Flexible Configuration:
    • Transimpedance Gain
    • External Hold Capacitor
    • Post-Gain
  • Single Supply: +2.7 V to +5.5 V
  • Quiescent Current: 9.2 mA
  • Small Package: 3-mm × 3-mm SON-10
  • OPA1S2384: Internal Switch Active High
  • OPA1S2385: Internal Switch Active Low


Compare all products in Transimpedance amplifiers Email Download to Excel
Part number Order Number of channels (#) GBW (Typ) (MHz) Total supply voltage (Max) (+5V=5, +/-5V=10) Total supply voltage (Min) (+5V=5, +/-5V=10) Vos (offset voltage @ 25 C) (Max) (mV) Rail-to-rail Features BW @ Acl (MHz) Operating temperature range (C) Package Group Package size: mm2:W x L (PKG) Approx. price (US$)
OPA1S2384 Order now 2     100     5.5     2.7     8     In
Small Size     250     -40 to 85     VSON | 10     10VSON: 9 mm2: 3 x 3 (VSON | 10)     1.10 | 1ku