A3848EEQ

更新时间： 2024-01-30 22:54:36

品牌	Logo	应用领域
急速微 - ALLEGRO		消费电路商用集成电路接收器集成电路接收机
页数	文件大小	规格书
3页	78K
描述
DUAL-CONVERSION AM RECEIVER

阅读下载

获取价格

技术参数
数据手册

如果您发现信息不准确，欢迎纠错

A3848EEQ 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
零件包装代码：	QFJ	包装说明：	QCCJ,
针数：	32	Reach Compliance Code：	unknown
风险等级：	5.92	Is Samacsys：	N
商用集成电路类型：	AUDIO SINGLE CHIP RECEIVER	解调类型：	AM
谐波失真：	0.4%	JESD-30 代码：	R-PQCC-J32
JESD-609代码：	e0	长度：	13.97 mm
功能数量：	1	端子数量：	32
最高工作温度：	105 °C	最低工作温度：	-40 °C
封装主体材料：	PLASTIC/EPOXY	封装代码：	QCCJ
封装形状：	RECTANGULAR	封装形式：	CHIP CARRIER
峰值回流温度（摄氏度）：	NOT SPECIFIED	认证状态：	Not Qualified
座面最大高度：	3.55 mm	最大压摆率：	65 mA
最大供电电压 (Vsup)：	10 V	最小供电电压 (Vsup)：	10 V
表面贴装：	YES	温度等级：	INDUSTRIAL
端子面层：	Tin/Lead (Sn/Pb)	端子形式：	J BEND
端子节距：	1.27 mm	端子位置：	QUAD
处于峰值回流温度下的最长时间：	NOT SPECIFIED	宽度：	11.43 mm
Base Number Matches：	1

A3848EEQ 数据手册

3848

DUAL-CONVERSION AM RECEIVER

3848

DUAL-CONVERSION AM RECEIVER

Providing the AM signal processing functions for an electronically

tuned AM receiver (ETR), the A3848EEQ includes two balanced

mixers, a crystal local oscillator, an L/C-tuned local oscillator, oscillator

buffer, IF amplifier, AM detector, scan control detectors, and a switch-

able voltage regulator. This dual-conversion device typically mixes the

incoming RF up to a first IF of 10.7 MHz, then down to 450 kHz, and

then detects the audio. The addition of a JFET matched to a whip

antenna, RF low-pass filter, IF selectivity, and audio stages gives a

complete AM radio which can be used in automotive receivers. The

frequency-detecting stop circuit is also capable of recovering narrow-

band FM, making it useful for scanners or weather band radio applica-

tions. Two AGC and field-strength indicator modes provide special

features for scanning.

SUB

MIX 2 OUT

FSI

REGULATOR

AFC OUT

REG

DET

AGC (MUTE)

CRYSTAL

STOP

AGC RATE 2

MIX 1 IN

MIX 2 OUT

MIX 1 OUT

MIX 2 E

MIX 1 OUT

AGC

MIX 2 E

WB AGC 1 IN

RESET

The A3848EEQ uses the dual criteria of frequency and amplitude

for establishing a valid stop. Tuning accuracy (frequency criterion) is

established by evaluating phase shift across the detector coil. The

circuitry is similar to that used in FM discriminators. Because this

detection system is phase operated, it remains effective even in the

presence of strong signals, which can cause false stops in systems

using narrow-band filters. The amplitude criterion for stop is deter-

mined by evaluating the IF level. It includes a unique circuit that

removes the effect of the AGC action. This allows the AGC tuning

components to be selected for low-frequency audio performance

without compromising scanning speed.

MIX 2

BYPASS

REF

Dwg. PS-012-1

Dwg. No. PS-012-1

In the normal AGC mode (AGC RESET low), a slow, narrow-band

field-strength indicator (FSI) is provided for controlling signal-depen-

dent functions such as stereo blending. A fast AGC mode (AGC

RESET high) resets the AGC holding capacitors to maximum gain.

This mode allows cataloging station strengths quickly during a band

sweep.

This AM signal processor is packaged in a rectangular, 32-lead,

plastic, leaded chip carrier (PLCC) for surface-mount applications and

is rated for operation over the temperature range of -40°C to +105°C

are available on special order.

ABSOLUTE MAXIMUM RATINGS

Supply Voltage, V_CC. . . . . . . . . . . . . . 12 V

Package Power Dissipation, P_D. . . . 1.2 W

Operating Temperature Range,

FEATURES

■ Low Noise Figure

■ Field-Strength Indicator

■ Buffered Oscillator

T_A. . . . . . . . . . . . . . . -40°C to +105°C

Storage Temperature Range,

■ Balanced Mixers

■ High Dynamic Range First Mixer ■ Fast Scan Mode

Always order by complete part number: A3848EEQ .

T_S. . . . . . . . . . . . . . . -65°C to +150°C

12 3

下载PDF

与A3848EEQ相关器件

型号	品牌	描述	获取价格	数据表
A38702L1	COOPER	30 A, BARRIER STRIP TERMINAL BLOCK, 1 ROW, 1 DECK	获取价格
A38702L2	COOPER	30 A, BARRIER STRIP TERMINAL BLOCK, 1 ROW, 1 DECK	获取价格
A38702L3	COOPER	30 A, BARRIER STRIP TERMINAL BLOCK, 1 ROW, 1 DECK	获取价格
A38702L4	COOPER	30 A, BARRIER STRIP TERMINAL BLOCK, 1 ROW, 1 DECK	获取价格
A38702L5	COOPER	30 A, BARRIER STRIP TERMINAL BLOCK, 1 ROW, 1 DECK	获取价格
A38702L6	COOPER	Barrier Strip Terminal Block, 30A, 1 Row(s), 1 Deck(s)	获取价格

产品中心

服务支持

精选活动

关于我们

帮助中心

A3848EEQ

A3848EEQ 技术参数

A3848EEQ 数据手册

与A3848EEQ相关器件

与A3848EEQ相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

A3848EEQ

A3848EEQ 技术参数

A3848EEQ 数据手册

与A3848EEQ相关器件

与A3848EEQ相关文章

您还可以找

您在本页遇到什么问题？