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SP1140
This is an intermediate frequency system IC designed for FM car stereo receivers. It is characterized by its versatile muting characteristics and allows designers to implement muting functions according to their design concepts.
- Product Description
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- Commodity name: SP1140
- 封装: SOP16/ZIP16
- 品牌: Wuxi Silicon Power Microelectronics
This is an intermediate frequency system IC designed for FM car stereo receivers. It is characterized by its versatile muting characteristics and allows designers to implement muting functions according to their design concepts.
The SP1140 is an IF system IC designed for FM car stereo receivers. It features variable muting characteristics, allowing designers to implement muting functions according to their design concepts.
Functions
● IF Amplifier Limiter
● Frequency Discrimination Detection
● Audio Preamplifier
● AFC Output
● Signal Level Strength Output
● AGC Output
● Mute Bandwidth
● Muting in Weak Signal Conditions
Applications
Versatile Muting:
(1) When the muting function is active under weak signal conditions, the ratio of the audio output to the change in input signal strength can be set to any given value.
(2) Maximum muting distribution range, approximately 6-40dB.
(3) The input signal level that triggers the muting circuit can be freely set.
Highest limiting sensitivity (typically 25dB, mute off)
High Signal-to-Noise Ratio (78dB)
Good AM Rejection (AMR), with six-stage differential amplifiers
Signal standard drive relative to input signal strength
Bandwidth adjustment for controlling AFC output
Delayed AGC output to front-end circuit.
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