TSH511CF STMicroelectronics, TSH511CF Datasheet - Page 17

• 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
General description
The TSH511 is a 0.4MHz to 11MHz dual FM analog receiver. The incoming signal is
amplified with a 22dB low noise amplifier (LNA) section. The good noise performance of the
LNA allows the photo diode for infrared applications to be connected directly to the TSH511
without any external preamplifier. The access pins for each section and the two standby
configurations offer high versatility for many applications: hi-fi stereo infrared receiver,
mono/stereo subcarrier receiver, power line carrier audio.
Figure 25. TSH511 block diagram
The LNA is common to both receivers but the output is split in two: one for each receiver.
Each LNA output can be connected to a first optional filter for bandpass or reject filtering.
The filtered signal is amplified with an intermediate amplifier (AMP) section followed by a
second filter. The AMP sections have 20dB typical gain.
Finally, the signal is amplified and limited in the limiter (LIM) section. The 60dB amplifier-
limiter LIM provides a constant amplitude signal to the demodulator. It reduces AM parasitic
demodulation in the FM demodulator.
The FM demodulator is a classic quadrature detector that uses an external tank.
GND
GND
AMP-IN2
AMP-IN2
VCC
VCC
LNA-OUT2
LNA-OUT2
VCC
VCC
LNA-IN
LNA-IN
GND
GND
LNA-OUT1
LNA-OUT1
VCC
VCC
AMP-IN1
AMP-IN1
DEC-LNA
DEC-LNA
10
10
11
11
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
amp.
amp.
amp.
amp.
44
44
12
12
LNA
LNA
43
43
13
13
42
42
14
14
limiter
limiter
limiter
limiter
41
41
15
15
RX2
RX2
RX1
RX1
TSH511
TSH511
40
40
16
16
FM demodulator
FM demodulator
FM demodulator
FM demodulator
39
39
17
17
38
38
18
18
37
37
19
19
Audio
Audio
buffers
buffers
36
36
Vref
Vref
20
20
Standby
Standby
35
35
21
21
SQUELCH
SQUELCH
34
34
22
22
General description
33
33
32
32
31
31
30
30
29
29
28
28
27
27
26
26
25
25
24
24
23
23
GND
GND
SBY1
SBY1
SBY2
SBY2
BUF-OUT2
BUF-OUT2
VCC
VCC
DEC-OUT
DEC-OUT
GND
GND
BUF-OUT1
BUF-OUT1
MUTE-OUT
MUTE-OUT
MUTE-INT
MUTE-INT
MUTE-IN
MUTE-IN
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