TEA6843HL/V1,557 NXP Semiconductors, TEA6843HL/V1,557 Datasheet - Page 9

• Manufacturer Part Number: TEA6843HL/V1,557
• Description: IC CAR RADIO TUNER 80-LQFP
• Manufacturer: NXP Semiconductors

Specifications of TEA6843HL/V1,557

• Frequency: AM, FM, WB
• Modulation Or Protocol: AM, FM
• Applications: AM/FM Radio Receiver
• Current - Receiving: 90mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 2.5 V ~ 12 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Sensitivity: -
• Memory Size: -
• Data Rate - Maximum: -
• Other names: 935268098557; TEA6843HL/V1; TEA6843HL/V1

Philips Semiconductors
7
7.1
7.1.1
The L and C tuned VCO provides the local oscillator signal
for both FM and AM mixer 1. It has a frequency range of
151.2 to 248.2 MHz.
7.1.2
The crystal oscillator provides a 20.5 MHz signal that is
used for:
7.1.3
Fast synthesizer PLL tuning system with local control for
inaudible RDS updating.
7.2
7.2.1
FM RF Digital Auto Alignment (DAA) circuitry for the
conversion of the VCO tuning voltage to a controlled
alignment voltage for the FM antenna tank circuit.
7.2.2
FM quadrature mixer converts FM RF (65 to 162.55 MHz)
to IF of 10.7 MHz. The FM mixer provides inherent image
rejection and high RF sensitivity.
It is capable of tuning the US FM, US weather,
Europe FM, Japan FM and East Europe FM bands:
7.2.3
The AGC threshold is programmable and the keyed AGC
function is switchable via the I
2003 Dec 19
Reference frequency for frequency synthesizer PLL
Local oscillator for AM mixer 2
Reference frequency for the IF counter
Timing signal for the RDS update algorithm
Reference frequency (75.368 kHz) for the TEA688x (car
audio signal processor - CASP) or TEF689x (car radio
integrated signal processor - CRISP).
US FM = 87.9 to 107.9 MHz
US weather FM = 162.4 to 162.55 MHz
Europe FM = 87.5 to 108 MHz
Japan FM = 76 to 91 MHz
East Europe FM = 65.8 to 74 MHz.
New In Car Entertainment (NICE)
extended car radio
FUNCTIONAL DESCRIPTION
Oscillators
FM signal channel
VCO
C
PLL
DAA
FM I/Q
FM
RYSTAL OSCILLATOR
KEYED
MIXER
AGC
2
C-bus.
9
If the keyed AGC function is activated, the AGC function is
keyed by the narrow band level (IF).
The AGC PIN diode drive can be set via the I
local function for search tuning.
7.2.4
The two FM IF amplifiers provide 10 dB and 8.5 dB
amplification with high linearity and dynamic range.
7.2.5
The FM quadrature demodulator includes automatic
centre frequency adjustment and THD compensation.
7.2.6
Muting depth and start of muting are adjustable via the
I
7.3
7.3.1
The AM tuner is realized in a double conversion technique
and is capable of selecting LW, MW and SW bands.
AM mixer 1 converts AM RF to IF1 of 10.7 MHz, while
AM mixer 2 converts IF1 of 10.7 MHz to IF2 of 450 kHz:
7.3.2
The AM RF includes a PIN diode drive circuit. The
threshold detection points for AM AGC are performed at
AM mixer 1 and AM IF2. AGC thresholds are
programmable at AM mixer 1 input via the I
7.3.3
The AM output provides either a demodulated AM Audio
Frequency (AF) or the corresponding AM IF2 signal. The
IF2 signal can be used for AM stereo decoder processing.
7.3.4
The AM detector output is either not muted or signal
strength dependent soft muted audio. The soft mute
function can be switched off via the I
2
C-bus.
LW = 144 to 288 kHz
MW = 522 to 1710 kHz (European and US AM band)
SW = 5.85 to 9.99 MHz (including the 31 m, 41 m and
49 m bands).
AM signal channel
FM IF
FM
FM MPX
AM
AM RF AGC
AM AF
AM
DEMODULATOR
TUNER
SOFT MUTE
AMPLIFIERS
OR
SOFT MUTE
IF2
AND
SWITCH
IF2 AGC
2
TEA6843HL
Product specification
C-bus.
2
C-bus.
2
C-bus to