TEA5760UK/N1-T ST-Ericsson Inc, TEA5760UK/N1-T Datasheet - Page 6

• Manufacturer Part Number: TEA5760UK/N1-T
• Description: IC FM STEREO RADIO 25-WLCSP
• Manufacturer: ST-Ericsson Inc

Specifications of TEA5760UK/N1-T

• Frequency: 76MHz ~ 90MHz, 87.5MHz ~ 108MHz
• Modulation Or Protocol: FM
• Current - Receiving: 10mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 2.6 V ~ 3.6 V
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 25-WLCSP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Applications: -
• Sensitivity: -
• Memory Size: -
• Data Rate - Maximum: -
• Other names: 935278949118

NXP Semiconductors
6. Functional description
TEA5760UK_1
Product data sheet
6.1 Low noise RF amplifier
6.2 FM mixer
6.3 VCO
6.4 Reference frequency
6.5 PLL tuning system
Table 2.
The Low Noise Amplifier (LNA) input impedance together with the LC RF input circuit
defines an FM band filter. The gain of the LNA is controlled by the RF AGC circuit to
prevent overdrive of the subsequent circuits.
The FM quadrature mixer converts the received RF (76 MHz to 108 MHz) to an IF of
225 kHz. Downconversion is achieved by multiplying the RF with the Local Oscillator (LO)
frequency. Image frequency suppression is achieved by using quadrature signal
processing.
The LC tuned VCO provides the LO signal for the FM quadrature mixer. The VCO
frequency range is 150 MHz to 217 MHz. No external varactor is required.
An external 32.768 kHz reference frequency is used as the system clock. The reference
frequency specifications are given in
The reference frequency is used for:
The PLL synthesizer tuning system is designed to operate with a 32.768 kHz reference
frequency. A 14-bit word is used to tune the radio (see
of this 14-bit word is as follows.
Formula for high-side injection:
Formula for low-side injection:
Symbol
MPXOUT
VAFL
VAFR
•
•
•
•
Synthesizer PLL reference frequency
Timing for the IF counter
Adjustment of the frequency of the stereo decoder VCO
Auto alignment of the selectivity as well as the demodulator filters
Pin description
Pin
E4
E5
E6
Rev. 01 — 14 December 2006
…continued
Description
multiplex signal (MPX) output pin
left audio output
right audio output
N
N
DEC
DEC
Section
=
=
------------------------------------------ -
------------------------------------------ -
4
4
10.
f
f
f
RF
f
RF
ref
ref
–
+
f
f
IF
IF
Table 11
Single chip FM stereo radio
and
TEA5760UK
Table
© NXP B.V. 2006. All rights reserved.
12). Calculation
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