Datasheet > TR5100

TR5100

更新时间： 2024-02-25 00:18:29

品牌	Logo	应用领域
其他 - ETC		对讲机
页数	文件大小	规格书
9页	115K
描述
Walkie-Talkie. hand Free

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

TR5100 数据手册

TR5100

the wireless IC company

Functional Description

Mixer

The mixer features a double-balanced configuration and incorporates an AC-coupled

input. It is designed to work up to 150MHz. It can be used in differential or single ended

mode by connecting the input pin “RFIN-” to ground through an 1uF capacitor.

TX & RX Oscillators

Both are Colpitts oscillators. The on-chip transistor operates with a crystal and LC reso-

nant elements up to 150MHz. Series resonant and overtone crystal are used to achieve

excellent local oscillator stability. Using an overtone crystal to enhance operation, the

internal transistor bias is increased by adding an external resistor from “RXOSCE” to

ground. Typically, -10dBm of local oscillator drive is needed to adequately drive the

mixer. (please refer to the application circuit)

IF amplifier

The IF amplifier is a differential-input, single-ended output emitter-coupled pair. It is used

to provide additional gain for reducing the influence of noise from the succeeding limiter

amplifier on the total receive noise figure. The output of the IF amplifier is buffered and

has an impedance is 1.5KΩ. When using 455KHz ceramic filter with source and load

impedance of 1.5KΩ, no external matching is needed.

RSSI

The received signal strength indicator (RSSI) output is a current proportional to the log of

the received signal amplitude. The RSSI current output is derived by summing currents

from limiting amplifier stages. The RSSI output current creates a voltage across an exter-

nal resistor at pin 31.

Limiter

The limiting amplifier consists of several dc-coupled amplifier stages. The fixed internal

input impedance is 1.5KΩ. The total gain of the limiting amplifier section is approximately

75dB.

Demodulator

Following the limiting amplifier, is the demodulator. The demodulator is a double-bal-

anced four-quadrant multiplier with an external 10pF quadrature capacitor between “LIM-

OUT” & “QUAD”. The external capacitor value may be increased to increase the IF

signal at the external parallel RLC resonant circuit which provides the 90 degree phase

shift and drives the quadrature detector. A single pin “QUAD” is for the external LC par-

allel resonant network connecting to the quadrature detector.

Mute

The mute circuit is controlled by the RSSI voltage which detects received signal strength.

If the incoming signal is weak, then the mute circuit would disable the demodulator and

speaker amp output.

Page 7

June 2001

1...4 5 678 9

中文翻译

下载PDF

与TR5100相关器件

型号	品牌	获取价格	描述	数据表
TR5270	MARKTECH	获取价格	TR5270 LEDs
TR5270_15	MARKTECH	获取价格	LEDs
TR5270M	MARKTECH	获取价格	LEDs
TR5270M_15	MARKTECH	获取价格	LEDs
TR-5510%	VISHAY	获取价格	General Purpose Inductor
TR-565610%	VISHAY	获取价格	General Purpose Inductor, 56uH, 10%, 1 Element
TR5853	APITECH	获取价格	RF AMPLIFIER MODEL
TR5853	SPECTRUM	获取价格	RF AMPLIFIER
TR6/MCR-1	ETC	获取价格	Fuse
TR6/MCR-1/16	ETC	获取价格	Fuse