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OPA657UG4 Datasheet(PDF) 1 Page - Texas Instruments |
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OPA657UG4 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 37 page Frequency(Hz) 116 106 96 86 76 66 100k 1M 10M 50M 10MHzBandwidth OPA657 (12pF) l -V b 200k V O 0.1pF Product Folder Sample & Buy Technical Documents Tools & Software Support & Community OPA657 SBOS197F – DECEMBER 2001 – REVISED AUGUST 2015 OPA657 1.6-GHz, Low-Noise, FET-Input Operational Amplifier 1 Features 3 Description The OPA657 device combines a high-gain bandwidth, 1 • High Gain Bandwidth Product: 1.6 GHz low-distortion, voltage-feedback operational amplifier • High Bandwidth 275 MHz (G = 10) with a low-voltage noise JFET-input stage to offer a • Slew Rate 700 V/µs (G = 10, 1-V Step) very high dynamic range amplifier for high-precision ADC (analog-to-digital converter) driving or wideband • Available in High Grade With Improved DC transimpedance applications. Photodiode applications Specifications see improved noise and bandwidth using this • Operating Temperature Range: –40°C to 85°C decompensated, high-gain bandwidth amplifier. • Low-Input Offset Voltage: ±250 µV Very low level signals can be significantly amplified in • Low-Input Bias Current: 2 pA a single OPA657 gain stage with exceptional • Low-Input Voltage Noise: 4.8 nV/ √Hz bandwidth and accuracy. Having a high 1.6-GHz gain bandwidth product gives greater than 10-MHz signal • High-Output Current: 70 mA bandwidths up to gains of 160 V/V (44 dB). The very • Fast Overdrive Recovery low input bias current and capacitance supports this performance even for relatively high source 2 Applications impedances. • Wideband Photodiode Amplifier Broadband photodetector applications benefit from • Wafer Scanning Equipment the low-voltage noise JFET inputs for the OPA657. The JFET input contributes virtually no current noise • ADC Input Amplifier while for broadband applications, a low voltage noise • Test and Measurement Front End is also required. The low 4.8 nV/ √Hz input voltage • High Gain Precision Amplifier noise provides exceptional input sensitivity for higher bandwidth applications. The example shown below • Optical Time Domain Reflectometry (OTDR) gives a total equivalent input noise current of 1.8 pA/ √Hz over a 10-MHz bandwidth. Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) SOT-23 (5) 2.90 mm × 1.60 mm OPA657 SOIC (8) 4.90 mm × 3.91 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. Frequency Response of 200-k Ω Transimpedance Wideband Photodiode Transimpedance Amplifier Amplifier 1 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. PRODUCTION DATA. |
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