Datasheet > TPA8304

TPA8304

更新时间： 2024-11-11 17:01:23

品牌	Logo	应用领域
思瑞浦 - 3PEAK		/
页数	文件大小	规格书
14页	622K
描述
140dB Range (1nA–10mA) Logarithmic Converter

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TPA8304 数据手册

TPA8304

140dB Range (1nA – 10mA) Logarithmic Converter

Features

Description

⚫

7 full decades of range: 1nA to 10mA

The TPA8304 is a logarithmic detector optimized for the

measurement of low frequency signal power in fiber optic

systems and offers a large dynamic range.

Law conformance error: 0.2 dB from 10nA to 10mA

Fast step response: raising 0.2μs, falling 5μs for 10nA to

10μA input on INPT

Wide measurement range, accuracy and fast step response are

achieved, which is very suitable for the requirement of optic

system.

⚫

Basic logarithmic intercept at 100 pA

Logarithmic slope of 200 mV/20dB (at the VLOG pin)

Optimized for fiber optic photodiode interfacing

Single-supply operation: 4.5 V to 5.5 V

Power down mode

The TPA8304 requires only a single positive supply of 5 V. Low

quiescent current and chip disable facilitate use in battery-

operated applications.

Applications

⚫

High accuracy optical power measurement

Wide range baseband log compression

Versatile detector for APC loops

EDFA

Block Diagram

VPS2

PDB

PWDN

VPS1

VREF

VLOG

VPDB

VSUM

INPT

Temperature

Compensation

BFIN

VSUM

5KOHM

BFNG

GND

ACOM

GND

VOUT

Figure 1

www.3peak.com

Rev.A.1

1 / 14

12 3 4 5 6 7...14

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