Wideband, Unity Gain Stable FET-Input Operational Amplifier - OPA656

OPA656 (ACTIVE)

Wideband, Unity Gain Stable FET-Input Operational Amplifier

 

Description

The OPA656 device combines a very wideband, unity-gain stable, voltage-feedback operational amplifier with a FET-input stage to offer an ultra high dynamic-range amplifier for Analog-to-Digital Converter (ADC) buffering and transimpedance applications. Extremely low DC errors give good precision in optical applications.

The high unity-gain stable bandwidth and JFET input allows exceptional performance in high-speed, low-noise integrators.

The high input impedance and low bias current provided by the FET input is supported by the ultra-low 7-nV/√Hz input voltage noise to achieve a very low integrated noise in wideband photodiode transimpedance applications.

Broad transimpedance bandwidths are achievable given the OPA656 device’s high 230-MHz gain bandwidth product. As shown below, a –3-dB bandwidth of 1 MHz is provided even for a high 1-MΩ transimpedance gain from a 47-pF source capacitance.

Features

  • 500 MHz Unity-gain Bandwidth
  • Low Input Bias Current: 2 pA
  • Low Offset And Drift: ±250 µV, ±2 µV/°C
  • Low Distortion: 74-dB SFDR at 5 MHz
  • High-Output Current: 70 mA
  • Low Input Voltage Noise: 7 nV/√Hz

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Parametrics Compare all products in High-Speed Op Amps (>=50MHz)

 
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
OPA656 OPA653 OPA657 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   
7    7    8    7    2.3    2.3   
13    13    12    13    3.6    3.6   
500    500    350    650    130    130   
1    2    7    2       
290    2675    700    2550    220    220   
7    6.1    4.8    8.9    4.5     
10    6.1    7    8.9    7     
14    32    14    30.5    23.4    23.4   
0.6    5    1.8    5    10     
No    No    No    No    No    No   
N/A    Decompensated    Decompensated    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)     
86    66    89    70       
5    50    20    50    20    20   
2    10    2    10       
500    500    1600    650    6800    6800   
70    70    70    70    20    20   
71    75    74    79    94    94   
81    96    106    100    97    97   
5    10    5    10    10    10   

WEBENCH® Designer OPA656

Amplifier Topology
 Non-inverting
 Inverting
Desired Power Supply Voltage
Positive Supply (Vcc):  V
Negative Supply (Vee):  V
Allowed Power Supply(Vcc-Vee) = 7.0 to 13.0 V
Desired Input and Output Requirements
  Min Max
Vin  V  V
Vout  V  V
Minimum Temperature = -40.0 °C
Maximum Temperature = 85.0 °C