U4311B-FS View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

U4311B-FS

Low-Current Superhet Remote Control Receiver

Atmel Corporation 

U4311B-FS

Application

The U4311B-FS is well-suited to implement UHF remote

control or data transmission systems, based on a low-

current superheterodyne receiver concept. SAW-devices

may be used in the transmitter’s as well as in the receiver

local oscillator. The front end should be a discrete circuit

application with low-current UHF transistors such as

S822T or S852T (Vishay Telefunken). The frequency of

the local oscillator can be determined either by coaxial

resonators or SAW devices. Due to the large

VS

SAW-resonator, tolerance an IF bandwidth * and in a FM

system additionally the discriminator amplitude charac-

teristic (see figure 28) * of 300 kHz or higher is pro-

posed. As the circuit needs only 3.0 V supply voltage for

operation, the front end may be a stacked design in order

to achieve a total receiver current consumption of approx-

imately 1 mA. Figure 29 shows a principle receiver

concept diagram.

350 mA

350 mA

RF in

Data out

1 mA

Signal path

Power supply

Figure 29. Principle diagram of a UHF remote control receiver

Package Information

5.7

Package SSO20

5.3

Dimensions in mm

6.75

4.5

6.50

4.3

1.30

0.25

0.15

0.05

6.6

0.65

5.85

6.3

20

11

95 10137

0.15

1

12 (13)

technical drawings

according to DIN

specifications

10

13007

Rev. A3, 28-Sep-00

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