ATR4255-ILSH

ATR4255-ILSH Datasheet


ATR4255

Part Datasheet
ATR4255-ILSH ATR4255-ILSH ATR4255-ILSH (pdf)
Related Parts Information
ATR4255-ILQH ATR4255-ILQH ATR4255-ILQH
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• FM Double-conversion System
• Integrated Second IF Filter with Software-controlled Bandwidth
• Completely Integrated FM Demodulator
• Soft Mute and Multipath Noise Cancellation
• Receiving Condition Analyzer
• AM Up/Down-conversion System
• AM Preamplifier with AGC and Stereo Capability
• 3-wire Bus Controlled
• Search Stop Signal Generation for AM and FM
• Automatic Alignment Possible
• Lead-free Package

Electrostatic sensitive device. Observe precautions for handling.

AM/FM Receiver IC

ATR4255

The ATR4255 is a highly integrated AM/FM front-end circuit manufactured using Atmel’s advanced BICMOS technology. It represents a complete, automatically adjustable AM/FM front end, containing a double-conversion system for FM and an up/down-conversion receiver for AM with IF1 = MHz and IF2 = 450 kHz. The front end is suitable for digital or analog AF-signal processing. Together with the PLL U4256BM, an automatically aligned high-performance AM/FM tuner can be built. These ICs are dedicated for highly sophisticated car radio applications.

Figure Block Diagram

MX1OA

IF1FMI

IF1AMI

V3 MX2OB

IF2IN

AMPLPF

MX1OB IF1REF

IF1OUT MX2IN

MX2OA
43 44 38 39 33
30 29 26 23 24
28 27

AMAGC 7

AMVREG 6

MX1AMA 41

MX1AMB 3

GNDMX 4

MX1FMB 2

MX1FMA 1

IF2OUT 20

AM dem.

OPLPF 32

IFAGCL 36

IFAGCCH 35

Automatic adjustment 37 FILADJ
16 OSCOUT

Divider

GNDOSC 15

OSCE 14 OSC OSCB 13

Bandgap
17 18 19 5
12 25 42 9

EN DATA FMAGC GND METER

V57 VS

Adj. chan
Ordering Information

Extended Type Number ATR4255-ILSH ATR4255-ILQH

Package Information

Package SSO44

Dimensions in mm

Package SSO44

Remarks Tube, lead-free Taped and reeled, lead-free
technical drawings according to DIN specifications

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Datasheet ID: ATR4255-ILSH 519304