TDA18271HD/C2-T NXP Semiconductors, TDA18271HD/C2-T Datasheet - Page 6

• Manufacturer Part Number: TDA18271HD/C2-T
• Description: Tuners HYBRIDE
• Manufacturer: NXP Semiconductors

Specifications of TDA18271HD/C2-T

• Bus Type: I2C
• Maximum Agc: 71 dB
• Maximum Frequency: 864 MHz
• Minimum Frequency: 45 MHz
• Mounting Style: SMD/SMT
• Package / Case: HLQFN-64
• Function: TV
• Noise Figure: 5.5 dB
• Operating Supply Voltage: 3.3 V
• Supply Voltage (min): 3.13 V
• Supply Voltage (max): 3.47 V
• Minimum Operating Temperature: 0 C
• Maximum Operating Temperature: + 70 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: TDA18271HD/C2,518

NXP Semiconductors
8. Functional description
TDA18271HD_4
Product data sheet
8.1 TV and FM reception
8.2 Master and slave operation
The RF input signal is driven to a low-noise amplifier. It is then band-pass filtered,
amplified and fed to the image rejection mixer. The mixer downconverts the RF signal to a
low IF depending on the channel bandwidth.
Standard IF filters are implemented for 1.5 MHz, 6 MHz, 7 MHz and 8 MHz channel
bandwidths; see
The Silicon Tuner can be used either as TV receiver or FM radio receiver.
The TDA18271HD requires a single 16 MHz crystal for clock generation. When bit
XTOUT_ON = 1, a clock signal is available on pins XTOUTP and XTOUTN to drive a
second tuner, a channel decoder or an IF demodulator (TDA8295) for analog TV reception
and FM radio.
Remark: Most recent video decoders from NXP Semiconductors include a low IF
demodulation function.
The Silicon Tuner can be used in two modes, selectable via the I
The RF_IN input pin can also be used for FM reception at the cost of software
modification. The FM_IN input pin can only receive signals in the FM frequency range.
The TDA18271HD allows easy dual-tuner configuration.
Each individual tuner has to be set either to Master mode or Slave mode by applying a
specific DC voltage to the XTOUT_MS pin; see
crystal oscillator part is used as negative impedance connected to the crystal part or as a
current buffer.
Table 4.
In dual tuner applications:
In single tuner applications:
Voltage on pin XTOUT_MS
0 V to 0.1V
0.4V
•
•
•
•
•
TV reception: the RF signal must be connected to pin RF_IN
FM reception: the RF signal must be connected to pin FM_IN or RF_IN
The first tuner is set to Master mode
The second tuner has to be set to Slave mode
The tuner must be set to Master mode
CC
to 0.6V
CC
Master/slave selection
CC
Table
43.
Rev. 04 — 19 May 2009
Tuner type
master
slave
Crystal oscillator function
negative impedance presented to the crystal
current input buffer
Table
4. This will decide whether the
TDA18271HD
2
C-bus:
© NXP B.V. 2009. All rights reserved.
Silicon Tuner IC
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