TSH511CF STMicroelectronics, TSH511CF Datasheet - Page 21

• Manufacturer Part Number: TSH511CF
• Description: IC RECEIVER DUAL FM 44-TQFP
• Manufacturer: STMicroelectronics

Specifications of TSH511CF

• Frequency: 2.3MHz and 2.8MHz
• Sensitivity: -95dBm
• Modulation Or Protocol: FM
• Applications: Infrared Headsets, Infrared Hi-Fi Stereo Transmitters
• Current - Receiving: 15mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 2.3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• For Use With: 497-8516 - BLANK PCB W/ BOM FOR TSH511/12
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Memory Size: -
• Data Rate - Maximum: -
• Other names: 497-2322

TSH511
8.5
Figure 29. Squelch schematics
The squelch section is driven by the receiver RX1 but controls both audio buffers.
Audio buffer sections
The audio signal from an FM demodulator enters into the 6dB/octave low-pass filter for de-
emphasis. 50µs and 75µs are standard de-emphasis values.
After the de-emphasis network, the potentiometer controls the volume.
The rail-to-rail output stage of each audio buffer is able to drive 20mW into 16
supply voltage. Under these conditions, the distortion is typically 0.3% before saturation.
The audio buffers can also drive the other usual impedances used in audio: 32
10k
The high input impedances of the audio buffers reduce the coupling capacitors to less than
0.1µF allowing space and cost saving.
Ω
(see the corresponding distortion curves).
General description
Ω
Ω
at 2.3V
, 600
Ω
and
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