OPA659 650MHz unity gain stable JFET input amplifier | TI.com

OPA659 (ACTIVE)

650MHz unity gain stable JFET input amplifier

650MHz unity gain stable JFET input amplifier  - OPA659
 

Description

The OPA659 combines a very wideband, unity-gain stable, voltage-feedback operational amplifier with a JFET-input stage to offer an ultra-high dynamic range amplifier for high impedance buffering in data acquisition applications such as oscilloscope front-end amplifiers and machine vision applications such as photodiode transimpedance amplifiers used in wafer inspection.

The wide 650-MHz unity-gain bandwidth is complemented by a very high 2550-V/µs slew rate.

The high input impedance and low bias current provided by the JFET input are supported by the low 8.9-nV/&radic:Hz input voltage noise to achieve a very low integrated noise in wideband photodiode transimpedance applications.

Broad transimpedance bandwidths are possible with the high 350-MHz gain bandwidth product of this device.

Where lower speed with lower quiescent current is required, consider the OPA656. Where unity-gain stability is not required, consider the OPA657.

Features

  • High Bandwidth: 650 MHz (G = 1 V/V)
  • High Slew Rate: 2550 V/µs (4-V Step)
  • Excellent THD: –78 dBc at 10 MHz
  • Low Input Voltage Noise: 8.9 nV/√Hz
  • Fast Overdrive Recovery: 8 ns
  • Fast Settling time (1% 4-V Step): 8 ns
  • Low Input Offset Voltage: ±1 mV
  • Low Input Bias Current: ±10 pA
  • High Output Current: 70 mA

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Parametrics Compare all products in High-speed op amps (GBW>=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
OPA659 OPA656
FET
Voltage FB    
FET
Voltage FB    
1     1    
7     8    
13     12    
650     500    
2     1    
2550     290    
8.9     7    
8.9     10    
30.5     14    
5     0.6    
No     No    
N/A     N/A    
Catalog     Catalog    
-40 to 85     -40 to 85    
SON | 8
SOT-23 | 5    
SOIC | 8
SOT-23 | 5    
See datasheet (SON)
5SOT-23: 8 mm2: 2.8 x 2.9 (SOT-23 | 5)    
8SOIC: 29 mm2: 6 x 4.9 (SOIC | 8)
5SOT-23: 8 mm2: 2.8 x 2.9 (SOT-23 | 5)    
70     86    
50     5    
10     2    
650     500    
70     70    
79     71    
100     81    
10     5    

Featured tools and software

WEBENCH® Designer OPA659

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