U4311B-FS

Features: · Usable for amplitude- and frequency-modulated transmission systems· Extremely low quiescent current (approximately 1 mA in standby mode due to wake-up concept)· Wide power supply voltage range 3 to 13 V· Sensitive IF amplifier for 10.7-MHz operating· Logarithmic AM demodulator· FM demo...

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U4311B-FS Picture
SeekIC No. : 004534894 Detail

U4311B-FS: Features: · Usable for amplitude- and frequency-modulated transmission systems· Extremely low quiescent current (approximately 1 mA in standby mode due to wake-up concept)· Wide power supply voltage...

floor Price/Ceiling Price

Part Number:
U4311B-FS
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/24

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Product Details

Description



Features:

· Usable for amplitude- and frequency-modulated transmission systems
· Extremely low quiescent current (approximately 1 mA in standby mode due to wake-up concept)
· Wide power supply voltage range 3 to 13 V
· Sensitive IF amplifier for 10.7-MHz operating
· Logarithmic AM demodulator
· FM demodulator
· Monoflop output to wake up a microcontroller
· High-performance operational amplifier to realize a data recovering filter
· Non-inverting clamping comparator with amplitudedepending hysteresis for data regeneration




Application

The U4311B-FS is well-suited to implement UHF remote control or data transmission systems, based on a lowcurrent
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 SAW-resonator, tolerance an IF bandwidth - and in a FM system additionally the discriminator amplitude characteristic (see figure 28) - of 300 kHz or higher is proposed.

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 approximately 1 mA. Figure 29 shows a principle receiver concept diagram.




Pinout

  Connection Diagram


Specifications

Parameters
Symbol
Value
Unit
Supply voltage
VS
13
V
Power dissipation at Tamb = 85°C
Ptot
400
mW
Junction temperature
Tj
125
Ambient temperature range for SSO20
Tamb
40 to +105
Storage temperature range
Tstg
55 to +125



Description

The U4311B-FS is a monolithic integrated circuit in bipolar technology for low-current UHF remote control super-heterodyne receivers in amplitude- or frequencymodulated mode. Typical applications are keyless car lock-, alarm- or tele-control remote indication systems.Especially for automotive applications, U4311B-FS supports a superhet design with about 1 mA total current consumption as required by the car manufacturers.




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