TEA5760UK/N1-T ST-Ericsson Inc, TEA5760UK/N1-T Datasheet - Page 8

• 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
TEA5760UK_1
Product data sheet
6.12.1 Soft mute
6.12.2 Hard mute
6.10 IF counter
6.11 Level voltage generator and analog-to-digital converter
6.12 Mute
The received RF signal is converted down to a 225 kHz IF. The IF is measured by means
of a frequency counter. A correct IF frequency measurement result indicates that the radio
is tuned to a valid channel and not to an image or a channel with high interference. The
7-bit IF counter output can be read via the control interface. The IF counter is active when
the tuning algorithm is active (see
interface. It activates a flag if the IF count result lies outside a predefined window. The IF
count period can be set to 1.953 ms or 15.625 ms with bit IFCTC in register TNCTRL (see
Table
The level voltage reflects the received field strength at the antenna. The analog level
voltage is digitized to 4 bits by the level Analog-to-Digital Converter (ADC). During a
search or preset tuning cycle the level ADC is activated and the recorded level ADC
information is stored in the registers. The level ADC information is used during search as
well as preset tuning to compare the received signal strength with a search stop level (see
Section
search stop level (see
deactivated.
The low-pass filtered level voltage drives the soft mute attenuator. At low RF input levels,
the audio output is faded and hence also the noise. The soft mute function can be
disabled with bit SMUTE in register TNCTRL (see
With bit MU in register TNCTRL (see
hard muted, this means they are put in high ohmic mode. The same can be done by
setting bits LHM (Left Hard Mute) or RHM (Right Hard Mute) in register TESTREG (see
Table
output is muted, the stereo decoder switches to mono. If the TEA5760UK is in Standby
mode the audio outputs are in high impedance mode, see
Table 3.
Type
AFM
MU
LHM
RHM
Standby
SMUTE
13).
19), which mutes only one output at a time (or both when both set). When one
7.1.4.3). A flag will be set to indicate that the level voltage is below the predefined
Specification of mute modes
Description
Audio Frequency
Mute
Hard Mute
Left Hard Mute
Right Hard Mute
Standby
Soft Mute
Rev. 01 — 14 December 2006
Figure
3). When the tuning algorithm is finished the level ADC is
Figure
Table
Left
Impedance
350
500 k
500 k
350
1 M
RF level sensitive audio level. Has no influence on mute
or pin impedance.
3) and the outcome can be read via the control
14) the audio outputs VAFL and VAFR can be
Table
Mode
muted
muted
muted
mono audio
muted
13).
Table
Single chip FM stereo radio
Right
Impedance
350
500 k
350
500 k
1 M
TEA5760UK
3.
© NXP B.V. 2006. All rights reserved.
Mode
muted
muted
mono audio
muted
muted
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