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OPA830 Datasheet(PDF) 1 Page - Texas Instruments |
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OPA830 Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 56 page  OPA838 1mA, 300MHz Gain Bandwidth, Voltage-Feedback Op Amp 1 Features • Gain bandwidth product: 300MHz • Very-low (trimmed) supply current: 950µA • Bandwidth: 90MHz (AV = 6V/V) • High full-power bandwidth: 45MHz, 4VPP • Negative rail input, rail-to-rail output • Single-supply operating range: 2.7V to 5.4V • 25°C input offset: ±125µV (maximum) • Input offset voltage drift: < ±1.6µV/°C (maximum) • Input voltage noise: 1.8nV/√Hz (> 200Hz) • Input current noise: 1pA/√Hz (> 2000Hz) • < 1µA shutdown current for power savings 2 Applications • Low-power transimpedance amplifier • Low-noise high-gain stage • 12-bit to 16-bit low-power SAR ADC driver • High-gain active filter design • Ultrasonic flow meter 3 Description The OPA838 decompensated voltage-feedback operational amplifier provides a high, 300MHz gain bandwidth product with 1.8nV/√Hz input noise voltage, requiring only a trimmed 0.95mA supply current. These features combine to provide an extremely power-efficient device for photodiode transimpedance designs and high-voltage gain stages, which require the lowest input voltage noise in signal receiver applications. Operating at the minimum recommended noninverting gain of 6V/V results in a 90MHz, –3dB bandwidth. Extremely low input noise and offset voltage make the OPA838 an excellent choice for high gains. Even at a dc-coupled gain of 1000V/V, a 300kHz signal bandwidth is available with a maximum output offset voltage of ±125mV. The single-channel OPA838 is available in 6-pin SOT-23, 6-pin SC70, and 8-pin X2QFN packages, all with a power shutdown feature. The OPA838 is also available in a 5-pin SC70 package. Package Information PART NUMBER PACKAGE(1) PACKAGE SIZE(2) OPA838 DBV (SOT-23, 6) 2.9mm × 2.8mm DCK (SC70, 5) 2mm × 1.25mm DCK (SC70, 6) 2mm × 1.5mm DXB (X2QFN, 8)(3) 1.4mm × 1.2mm (1) For more information, see Section 11. (2) The package size (length × width) is a nominal value and includes pins, where applicable. (3) Preview information (not Production Data). Large Area Photodetector With 100pF Capacitance + – VCC = 3V 100k 100nF 100pF Diode Current Direction –VBIAS 1pF 73.2 2.2nF 1MHz Post Filter VOUT 100k Single 3V Supply, < 3mW Photodiode Amplifier With < 1.1pA/√Hz Total Input-Referred Current Noise and 100kΩ Gain With Overall 1MHz SSBW OPA838 SBOS867D – AUGUST 2017 – REVISED SEPTEMBER 2024 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA. |
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