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OPA657器件将高增益带宽,低失真,电压反馈运算放大器与低压噪声JFET输入级相结合,非常高的动态范围放大器,用于高精度ADC(模数转换器)驱动或宽带互阻抗应用。使用这种失衡的高增益带宽放大器,光电二极管应用可以提高噪声和带宽。
在单个OPA657增益级中可以显着放大极低电平信号,具有出色的带宽和精度。具有1.6 GHz高增益带宽的产品可提供高于10 MHz的信号带宽,最高可达160 V /V(44 dB)。即使对于相对较高的源阻抗,极低的输入偏置电流和电容也支持这种性能。
宽带光电探测器应用受益于OPA657的低压噪声JFET输入。 JFET输入几乎不会产生电流噪声,而对于宽带应用,也需要低电压噪声。低4.8 nV /√ Hz 输入电压噪声为更高带宽的应用提供了出色的输入灵敏度。下面的示例给出了在10 MHz带宽内的总等效输入噪声电流为1.8 pA /√ Hz 。
Architecture |
Number of Channels (#) |
Total Supply Voltage (Min) (+5V=5, +/-5V=10) |
Total Supply Voltage (Max) (+5V=5, +/-5V=10) |
BW @ Acl (MHz) |
Acl, min spec gain (V/V) |
Slew Rate (Typ) (V/us) |
Vn at Flatband (Typ) (nV/rtHz) |
Vn at 1kHz (Typ) (nV/rtHz) |
Iq per channel (Typ) (mA) |
Vos (Offset Voltage @ 25C) (Max) (mV) |
Rail-to-Rail |
Features |
Rating |
Operating Temperature Range (C) |
Package Group |
Package Size: mm2:W x L (PKG) |
CMRR (Typ) (dB) |
Input Bias Current (Max) (pA) |
Offset Drift (Typ) (uV/C) |
GBW (Typ) (MHz) |
Output Current (Typ) (mA) |
2nd Harmonic (dBc) |
3rd Harmonic (dBc) |
@ MHz |
OPA657 | OPA653 | OPA656 | OPA659 | OPA857 | OPA857-DIE |
---|---|---|---|---|---|
FET Voltage FB | FET | FET Voltage FB | FET Voltage FB | FET Voltage FB | FET Voltage FB |
1 | 1 | 1 | 1 | 1 | 1 |
8 | 7 | 7 | 7 | 2.3 | 2.3 |
12 | 13 | 13 | 13 | 3.6 | 3.6 |
350 | 500 | 500 | 650 | 130 | 130 |
7 | 2 | 1 | 2 | ||
700 | 2675 | 290 | 2550 | 220 | 220 |
4.8 | 6.1 | 7 | 8.9 | 4.5 | |
7 | 6.1 | 10 | 8.9 | 7 | |
14 | 32 | 14 | 30.5 | 23.4 | 23.4 |
1.8 | 5 | 0.6 | 5 | 10 | |
No | No | No | No | No | No |
Decompensated | Decompensated | N/A | N/A | N/A | N/A |
Catalog | Catalog | Catalog | Catalog | Catalog | Catalog |
-40 to 85 | -40 to 85 | -40 to 85 | -40 to 85 | -40 to 95 | -40 to 85 |
SOIC SOT-23 | SON SOT-23 | SOIC SOT-23 | SON SOT-23 | VQFN | |
8SOIC: 29 mm2: 6 x 4.9(SOIC) 5SOT-23: 8 mm2: 2.8 x 2.9(SOT-23) | See datasheet (SON) 5SOT-23: 8 mm2: 2.8 x 2.9(SOT-23) | 8SOIC: 29 mm2: 6 x 4.9(SOIC) 5SOT-23: 8 mm2: 2.8 x 2.9(SOT-23) | See datasheet (SON) 5SOT-23: 8 mm2: 2.8 x 2.9(SOT-23) | 16VQFN: 9 mm2: 3 x 3(VQFN) | |
89 | 66 | 86 | 70 | ||
20 | 50 | 5 | 50 | 20 | 20 |
2 | 10 | 2 | 10 | ||
1600 | 500 | 500 | 650 | 6800 | 6800 |
70 | 70 | 70 | 70 | 20 | 20 |
74 | 75 | 71 | 79 | 94 | 94 |
106 | 96 | 81 | 100 | 97 | 97 |
5 | 10 | 5 | 10 | 10 | 10 |
无样片 |