OPA820 单位增益稳定低噪声电压反馈运算放大器 | 德州仪器 TI.com.cn

OPA820 (正在供货)

单位增益稳定低噪声电压反馈运算放大器

 

描述

The OPA820 device provides a wideband, unity-gain stable, voltage-feedback amplifier with a very-low input-noise voltage and high-output current using a low 5.6-mA supply current. At unity-gain, the OPA820 device gives more than 800-MHz bandwidth with less than 1-dB peaking. The OPA820 device complements this high-speed operation with excellent DC precision in a low-power device. A worst-case input-offset voltage of ±750 µV and an offset current of ±400 nA provide excellent absolute DC precision for pulse amplifier applications.

Minimal input and output voltage-swing headroom allow the OPA820 device to operate on a single 5-V supply with more than 2-VPP output swing. While not a rail-to-rail (RR) output, this swing supports most emerging analog-to-digital converter (ADC) input ranges with lower power and noise than typical RR output op amps.

Exceptionally low dG/dP (0.01% or 0.03°) supports low-cost composite-video line-driver applications. Existing designs can use the industry-standard pinout, 8-pin SOIC package while emerging high-density portable applications can use the 5-pin SOT-23. Offering the lowest thermal impedance of the industry in a SOT package, along with full specification over both the commercial and industrial temperature ranges, provides solid performance over a wide temperature range.

特性

  • High Bandwidth (240 MHz, G = 2)
  • High-Output Current (±110 mA)
  • Low-Input Noise (2.5 nV/√Hz)
  • Low-Supply Current (5.6 mA)
  • Flexible Supply Voltage:
    • Dual ±2.5 V to ±6 V
    • Single 5 V to 12 V
  • Excellent DC Accuracy:
    • Maximum 25°C Input Offset Voltage = ±750 µV
    • Maximum 25°C Input Offset Current = ±400 nA

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参数 与其它产品相比 高速 运算放大器 (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
OPA820 OPA2822 OPA4820
Bipolar
Voltage FB    
Bipolar
Voltage FB    
Bipolar
Voltage FB    
1     2     4    
5     5     5    
12     12     12    
800     400     650    
1     1     1    
240     170     240    
2.5     2     2.5    
2.5     2     2.5    
5.6     9.6     5.6    
1.1     1.2     0.8    
No     No     No    
N/A     N/A     N/A    
Catalog     Catalog     Catalog    
-40 to 85     -40 to 85     -40 to 85    
SOIC | 8
SOT-23 | 5    
SOIC | 8
VSSOP | 8    
SOIC | 14
TSSOP | 14    
8SOIC: 29 mm2: 6 x 4.9 (SOIC | 8)
5SOT-23: 8 mm2: 2.8 x 2.9 (SOT-23 | 5)    
8SOIC: 29 mm2: 6 x 4.9 (SOIC | 8)
8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)    
14SOIC: 52 mm2: 6 x 8.65 (SOIC | 14)
14TSSOP: 32 mm2: 6.4 x 5 (TSSOP | 14)    
85     110     85    
16000000     18000000     20000000    
4     5     4    
800     400     650    
110     150     85    
85     91     84    
95     100     92    
1     1     1    

设计工具

WEBENCH® Designer OPA820

Amplifier Topology
 Non-inverting
 Inverting
Desired Power Supply Voltage
Positive Supply (Vcc):  V
Negative Supply (Vee):  V
Allowed Power Supply(Vcc-Vee) = 5.0 to 12.0 V
Desired Input and Output Requirements
  Min Max
Vin  V  V
Vout  V  V
Minimum Temperature = -40.0 °C
Maximum Temperature = 85.0 °C