型号LMH6517
品牌
分类可编程和可变增益放大器（PGA 和 VGA）
描述具有数字控制增益的低功耗、低噪声 IF 和基带双路 16 位 ADC 驱动器
相关操作
产品概述

参数

2nd harmonic (dBc) 70
3rd harmonic (dBc) 92
Frequency of harmonic distortion measurement (MHz) 10
Acl, min spec gain (V/V) 0.33
Architecture Fully Differential ADC Driver, VGA
BW at Acl (MHz) 1200
Gain (max) (dB) 22
Gain (min) (dB) -9.5
Step size (dB) 0.5
Type RF VGA
Iq per channel (typ) (mA) 80
Number of channels 2
Rating Catalog
Operating temperature range (°C) -40 to 85
Slew rate (typ) (V/µs) 5000
Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 5.25
Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 4.5
Vs (min) (V) 4.5
Vs (max) (V) 5.25

封装 | 引脚 | 尺寸

WQFN (RTV) 32 25 mm² 5 x 5

特性

  • Accurate, 0.5dB Gain Steps
  • 200Ω Resistive, Differential Input
  • Low Impedance, Differential Output
  • Disable Function for Each Channel
  • Parallel Gain Control
  • SPI Compatible Serial Bus
  • Two Wire, Pulse Mode Control
  • On Chip Register Stores Gain Setting
  • Low Sensitivity of Linearity and Phase to Gain Setting
  • Single 5V Supply Voltage
  • Small Footprint WQFN Package

Key Specifications

  • OIP3: 43dBm @ 200MHz
  • Noise figure 5.5dB
  • Gain step size of 0.5dB
  • Gain step accuracy: 0.05dB
  • Frequency Range of 1200 MHz
  • Supply current 80mA per channel

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说明

The LMH6517 contains two high performance, digitally controlled variable gain amplifiers (DVGA). It has been designed for use in narrowband and broadband IF sampling applications. Typically the LMH6517 drives a high performance ADC in a broad range of mixed signal and digital communication applications such as mobile radio and cellular base stations where automatic gain control (AGC) is required to increase system dynamic range.

Each channel of LMH6517 has an independent, digitally controlled attenuator and a high linearity, differential output amplifier. Each block has been optimized for low distortion and maximum system design flexibility. Each channel can be individually disabled for power savings.

The LMH6517 digitally controlled attenuator provides precise 0.5dB gain steps over a 31.5dB range. On chip digital latches are provided for local storage of the gain setting. Both serial and parallel programming options are provided. A Pulse mode is also offered where simple up or down commands can change the gain one step at a time.

The output amplifier has a differential output allowing large signal swings on a single 5V supply. The low impedance output provides maximum flexibility when driving filters or analog to digital converters.

The LMH6517 operates over the industrial temperature range of −40°C to +85°C. The LMH6517 is available in a 32-Pin, thermally enhanced, WQFN package.