型号OPA4820
品牌
分类高速运算放大器 (GBW ≥ 50MHz)
描述四路、单位增益、低噪声、电压反馈运算放大器
相关操作
产品概述

参数

Architecture Voltage FB
Number of channels 4
Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 5
Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 12
GBW (typ) (MHz) 250
BW at Acl (MHz) 650
Acl, min spec gain (V/V) 1
Slew rate (typ) (V/µs) 240
Vn at flatband (typ) (nV√Hz) 2.5
Vn at 1 kHz (typ) (nV√Hz) 2.5
Iq per channel (typ) (mA) 5.6
Vos (offset voltage at 25°C) (max) (mV) 0.8
Rail-to-rail No
Rating Catalog
Operating temperature range (°C) -40 to 85
CMRR (typ) (dB) 85
Input bias current (max) (pA) 20000000
Offset drift (typ) (µV/°C) 4
Iout (typ) (mA) 85
2nd harmonic (dBc) 84
3rd harmonic (dBc) 92
Frequency of harmonic distortion measurement (MHz) 1

封装 | 引脚 | 尺寸

SOIC (D) 14 51.9 mm² 8.65 x 6
TSSOP (PW) 14 32 mm² 5 x 6.4

特性

  • HIGH BANDWIDTH: 220MHz (G = +2)
  • HIGH OUTPUT CURRENT: ±85mA
  • LOW INPUT NOISE: 2.5nV/Hz
  • LOW SUPPLY CURRENT: 5.7mA/ch
  • FLEXIBLE SUPPLY VOLTAGE:
    ±2V to ±6.3V Dual Supply
    +4V to +12.6V Single Supply
  • EXCELLENT DC ACCURACY:
    • Maximum 25°C Input Offset Voltage = 0.8mV
    • Maximum 25°C Input Offset Current = 500nA
  • APPLICATIONS
    • LOW–COST VIDEO LINE DRIVERS
    • ADC PREAMPS
    • ACTIVE FILTERS
    • LOW–NOISE INTEGRATORS
    • PORTABLE TEST EQUIPMENT
    • OPTICAL CHANNEL AMPLIFIERS
    • LOW–POWER, BASEBAND AMPLIFIERS
    • CCD IMAGING CHANNEL AMPLIFIERS
    • OPA4650 UPGRADE

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说明

The OPA4820 provides a wideband, unity-gain stable, voltage-feedback amplifier with a very low input noise voltage and high output current using a low 5.7mA/ch supply current. At unity-gain, the OPA4820 gives > 600MHz bandwidth with < 1 dB peaking. The OPA4820 complements this high-speed operation with excellent DC precision in a low-power device. A worst-case input offset voltage of ±0.8mV and an offset current of ±500nA give excellent absolute DC precision for pulse amplifier applications.

Minimal input and output voltage swing headroom allow the OPA4820 to operate on a single +5V supply with > 2VPP output swing. While not a rail-to-rail (RR) output, this swing will support 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%/0.03°) supports low-cost composite video line driver applications. Existing designs can use the industry-standard quad pinout SO-14 package while emerging high-density portable applications can use the TSSOP-14.