OPA657U
Op Amp Single High Speed Amplifier ±6V/12V 8-Pin SOIC Tube
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Part Number : OPA657U
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Package/Case : SOIC-8
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Brands : TI
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Components Categories : High-speed op amps (GBW ≥ 50 MHz)
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Datesheet : OPA657U DataSheet (PDF)
Overview of OPA657U
The OPA657 device combines a high-gain bandwidth, low-distortion, voltage-feedback operational amplifier with a low-voltage noise JFET-input stage to offer a very high dynamic range amplifier for high-precision ADC (analog-to-digital converter) driving or wideband transimpedance applications. Photodiode applications see improved noise and bandwidth using this decompensated, high-gain bandwidth amplifier.
Very low level signals can be significantly amplified in a single OPA657 gain stage with exceptional bandwidth and accuracy. Having a high 1.6-GHz gain bandwidth product gives greater than 10-MHz signal bandwidths up to gains of 160 V/V (44 dB). The very low input bias current and capacitance supports this performance even for relatively high source impedances.
Broadband photodetector applications benefit from the low-voltage noise JFET inputs for the OPA657. The JFET input contributes virtually no current noise while for broadband applications, a low voltage noise is also required. The low 4.8 nV/√Hz input voltage noise provides exceptional input sensitivity for higher bandwidth applications. The example shown below gives a total equivalent input noise current of 1.8 pA/√Hz over a 10-MHz bandwidth.
Key Features
- High Gain Bandwidth Product: 1.6 GHz
- High Bandwidth 275 MHz (G = 10)
- Slew Rate 700 V/µs (G = 10, 1-V Step)
- Available in High Grade With Improved DC
Specifications - Operating Temperature Range: –40°C to 85°C
- Low-Input Offset Voltage: ±250 µV
- Low-Input Bias Current: 2 pA
- Low-Input Voltage Noise: 4.8 nV/√Hz
- High-Output Current: 70 mA
- Fast Overdrive Recovery
Specifications
The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.
Architecture | FET / CMOS Input, Voltage FB | Number of channels | 1 |
Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) | 8 | Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) | 12 |
GBW (typ) (MHz) | 1600 | BW at Acl (MHz) | 350 |
Acl, min spec gain (V/V) | 7 | Slew rate (typ) (V/µs) | 700 |
Vn at flatband (typ) (nV√Hz) | 4.8 | Vn at 1 kHz (typ) (nV√Hz) | 7 |
Iq per channel (typ) (mA) | 14 | Vos (offset voltage at 25°C) (max) (mV) | 1.8 |
Rail-to-rail | No | Features | Decompensated |
Rating | Catalog | Operating temperature range (°C) | -40 to 85 |
CMRR (typ) (dB) | 89 | Input bias current (max) (pA) | 20 |
Offset drift (typ) (µV/°C) | 2 | Iout (typ) (mA) | 70 |
2nd harmonic (dBc) | 74 | 3rd harmonic (dBc) | 106 |
Frequency of harmonic distortion measurement (MHz) | 5 |
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Warranty, Returns, and Additional Information
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