型号OPA875
品牌
分类高速运算放大器 (GBW ≥ 50MHz)
描述具有 2:1 高速多路复用器的单通道、700MHz 运算放大器
相关操作
产品概述

参数

Architecture Fixed Gain/Buffer
Number of channels 1
Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 6
Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 12
BW at Acl (MHz) 700
Acl, min spec gain (V/V) 2
Slew rate (typ) (V/µs) 3100
Vn at flatband (typ) (nV√Hz) 6.7
Vn at 1 kHz (typ) (nV√Hz) 10
Iq per channel (typ) (mA) 11
Vos (offset voltage at 25°C) (max) (mV) 14
Rail-to-rail No
Features Integrated multiplexer
Rating Catalog
Operating temperature range (°C) -40 to 85
Input bias current (max) (pA) 41000000
Iout (typ) (mA) 70
2nd harmonic (dBc) 66
3rd harmonic (dBc) 87
Frequency of harmonic distortion measurement (MHz) 10

封装 | 引脚 | 尺寸

SOIC (D) 8 29.4 mm² 4.9 x 6
VSSOP (DGK) 8 14.7 mm² 3 x 4.9

特性

  • 700MHz SMALL-SIGNAL BANDWIDTH
    (AV = +2)
  • 425MHz, 4VPP BANDWIDTH
  • 0.1dB GAIN FLATNESS to 200MHz
  • 4ns CHANNEL SWITCHING TIME
  • LOW SWITCHING GLITCH: 40mVPP
  • 3100V/µs SLEW RATE
  • 0.025%/0.025° DIFFERENTIAL GAIN, PHASE
  • HIGH GAIN ACCURACY: 2.0V/V ±0.4%
  • APPLICATIONS
    • RGB SWITCHING
    • LCD PROJECTOR INPUT SELECT
    • WORKSTATION GRAPHICS
    • ADC INPUT MUX
    • DROP-IN UPGRADE TO LT1675-1

All other trademarks are the property of their respective owners.

说明

The OPA875 offers a very wideband, single-channel 2:1 multiplexer in an SO-8 or a small MSOP-8 package. Using only 11mA, the OPA875 provides a gain of +2 video amplifier channel with greater than 425MHz large-signal bandwidth (4VPP). Gain accuracy and switching glitch are improved over earlier solutions using a new input stage switching approach. This technique uses current steering as the input switch while maintaining an overall closed-loop design. With greater than 700MHz small-signal bandwidth at a gain of 2, the OPA875 gives a typical 0.1dB gain flatness to greater than 200MHz.

System power may be reduced using the chip enable feature for the OPA875. Taking the chip enable line high powers down the OPA875 to less than 300µA total supply current. Muxing multiple OPA875 outputs together, then using the chip enable to select which channels are active, increases the number of possible inputs.

Where three channels are required, consider using the OPA3875 for the same level of performance.