|
|
PDF TEF6721HL Data sheet ( Hoja de datos )
| Número de pieza | TEF6721HL | |
| Descripción | Car radio tuner front-end | |
| Fabricantes | NXP Semiconductors | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de TEF6721HL (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
|
No Preview Available !
TEF6721HL
Car radio tuner front-end for digital IF
Rev. 04 — 20 December 2005
Product data sheet
1. General description
The TEF6721HL is a single chip car radio tuner for AM, FM standard, FM In-Band
On-Channel Digital Audio Broadcast (IBOC DAB) and weather band providing combined
AM and FM gain controlled differential Intermediate Frequency (IF) output for the
SAF7730H including the following functions:
• AM up-conversion tuner to an IF frequency of 10.7 MHz for Long Wave (LW)/Medium
Wave (MW)/Short Wave (SW) (31 m, 41 m and 49 m bands)
• FM single conversion tuner to an IF frequency of 10.7 MHz with integrated image
rejection for US FM, Europe FM, Japan FM, East Europe FM and weather band
reception; all bands can be selected using high side or low side Local Oscillator (LO)
injection
• Tuning system includes Voltage-Controlled Oscillator (VCO), crystal oscillator and
Phase-Locked Loop (PLL) synthesizer on one chip.
2. Features
s FM mixer for conversion of FM Radio Frequency (RF) (64 MHz to 108 MHz and US
weather band) to an IF of 10.7 MHz; the mixer provides inherent image rejection and
can be switched from low injection to high injection Local Oscillator (LO) via the
I2C-bus; two different mixer conversion gains can be selected via the I2C-bus
s Automatic Gain Control (AGC) PIN diode drive circuit for FM RF AGC; AGC detection
at FM mixer input and IF AGC amplifier input; AGC threshold for detection at FM mixer
input is a programmable and keyed function switchable via the I2C-bus; the AGC PIN
diode drive can be activated via the I2C-bus as a local function for search tuning; in
AM mode the AGC PIN diode drive can be activated via the I2C-bus if required
s Digital alignment circuit for bus controlled matching of oscillator tuning voltage to FM
antenna tank circuit tuning voltage
s Buffer output for weather band flag
s Combined AM and FM IF AGC amplifier with high dynamic input range; one of the four
gain settings is selected automatically via two control signals from IF Digital Signal
Processor (DSP); combined differential AM and FM IF output signal to
analog-to-digital converter of IF DSP
s AM mixer for conversion of AM RF to AM IF 10.7 MHz
s AM RF PIN diode drive circuit and RF Junction Field Effect Transistor (JFET)
conductance control by AGC cascode drive circuit; AGC threshold detection at AM
mixer and IF AGC input; threshold for detection at AM mixer is programmable via the
I2C-bus
s AM and FM RF AGC monitor output intended for gain control of active antennas
1 page  
Philips Semiconductors
6. Pinning information
6.1 Pinning
TEF6721HL
Car radio tuner front-end for digital IF
i.c. 1
VDDA1 2
AMIFIN 3
FMIFIN 4
IFDEC 5
IFGND 6
IFAGCBIAS 7
i.c. 8
FMMIXOUT1 9
AMMIXOUT1 10
FMMIXOUT2 11
AMMIXOUT2 12
VDDA2 13
SWPORT1 14
AMMIXDEC 15
AMMIXIN 16
TEF6721HL
48 AFHOLD
47 AFSAMPLE
46 BUSENABLE
45 ADDRSEL
44 VDDA4
43 OSCTNK
42 OSCFDB
41 VCOGND
40 VDDD
39 DGND
38 VDDA3
37 CPOUT
36 VTUNE
35 DAAIN
34 DAATD
33 KAGC
001aac646
Fig 2. Pin configuration for LQFP64
6.2 Pin description
Table 3: Pin description
Symbol
Pin
i.c. 1
VDDA1
AMIFIN
2
3
FMIFIN
4
IFDEC
5
IFGND
6
IFAGCBIAS
7
i.c. 8
FMMIXOUT1 9
AMMIXOUT1 10
Description
internally connected for test purposes; leave open-circuit
analog supply voltage 1 (8.5 V) for IF AGC amplifier
IF AGC amplifier AM input (10.7 MHz)
IF AGC amplifier FM input (10.7 MHz)
IF AGC amplifier AM and FM decoupling
IF AGC amplifier ground
bias voltage for IF AGC amplifier decoupling
internally connected for test purposes; connect to ground
FM mixer IF output 1 (10.7 MHz)
AM mixer IF output 1 (10.7 MHz)
TEF6721HL_4
Product data sheet
Rev. 04 — 20 December 2005
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
5 of 48
5 Page 
Philips Semiconductors
TEF6721HL
Car radio tuner front-end for digital IF
No default settings at power-on reset. I2C-bus transmission is required to program the
IC.
8.1.1 Data transfer
Data sequence: address, byte 0, byte 1, byte 2, byte 3, byte 4 and byte 5.
The data transfer has to be in this order. The LSB of the address being logic 0 indicates a
write operation.
Bit 7 of each byte is considered the MSB and has to be transferred as the first bit of the
byte.
The data becomes valid at the output of the internal latches with the acknowledge of each
byte. A STOP condition after any byte can shorten transmission times.
When writing to the transceiver by using the STOP condition before completion of the
whole transfer:
• The remaining bytes will contain the old information
• If the transfer of a byte is not completed, this byte is lost and the previous information
is available.
8.1.2 Frequency setting
For new frequency setting, in both AM and FM mode, the programmable divider is
enabled by setting bit PRESET to logic 1. To select a frequency, two I2C-bus
transmissions are necessary:
• First: bit PRESET = 1
• Second: bit PRESET = 0.
8.1.3 Restriction of the I2C-bus characteristic
At −40 °C the start of the acknowledge bit after transmitting the slave address exceeds the
general requirement of tHD;DAT < 3.45 µs. The start of acknowledge is tST;ACK < 4.1 µs over
the full temperature range from −40 °C to +85 °C. This will not influence the overall
system performance, because the required set-up time tSU;DAT > 250 ns is fulfilled at any
condition.
8.2 I2C-bus protocol
8.2.1 Data transfer mode and IC address
S SLAVE ADDRESS W ACK-s
Fig 5. Write mode
DATA
ACK-s P
data transferred
(n bytes + acknowledge)
001aad 050
TEF6721HL_4
Product data sheet
Rev. 04 — 20 December 2005
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
11 of 48
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet TEF6721HL.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| TEF6721HL | Car radio tuner front-end | NXP Semiconductors |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |