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Details, datasheet, quote on part number:FI1256HM
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Datasheet text preview:
BU TUNERS
DATA SHEET
FI1256 MK2 Desktop video tuner system CCIR D/K
Preliminary specification File under BU Tuners, DC03 1996 Jul 26
Philips Components
Preliminary specification
Desktop video tuner system CCIR D/K
FEATURES · System CCIR D/K · True 5 V device (low power dissipation) · Full frequency range from channel 1 (49.75 MHz) to channel 57 (863.25 MHz) · PLL controlled tuning · True-synchronous vision IF demodulator (PLL) · Demodulated video output, AF sound output, second sound IF output · I2C-bus control of tuning, address selection, AFC status information
FI1256 MK2
converter in the PLL tuning IC, so that the AFC status can be read via the I2C-bus. ORDERING INFORMATION TYPE DESCRIPTION CATALOGUE NUMBERS
· Complies with European regulations on radiation, signal handling and immunity ("CENELEC 55020, 55013'' and ``CISPR 13") · Small horizontally mounted metal housing. DESCRIPTION The FI1200 MK2 family of front ends are designed to meet a wide range of RF applications in the PC Multi-Media environment. The FI1256 MK2 types are available with a single 75 input for TV reception. The input connector is available in either standard phono (female socket) or IEC (female socket). The tuning and bandswitching are performed through the built-in digitally controlled I2C-bus. All front ends meet the input immunity and radiation of CISPR 13. The FI1256 MK2 consists of a tuner section and an IF section, which are all designed on a single PCB. The front end is assembled in a metal housing made of a rectangular tin plated steel frame with front and rear covers which have soldered contacts to the frame. A single phono or IEC aerial socket is mounted on one side of the frame. All other connections are made via pins at the bottom. The tuner section is equipped with 3 tuned RF MOSFET input stages, with a 3-band mixer-oscillator IC, containing the oscillators, mixers and IF amplifier. Tuning and band switching in the tuner section are done with a digital programmable PLL tuning system. This enables tuning with step-size programmable between 31.25, 50.0 or 62.5 kHz. A DC-DC converter is built around the PLL synthesizer IC to provide the tuning voltage, thus making the FI1256 MK2 front end a true 5 V device. The IF section uses a true-synchronous vision IF demodulator (PLL) with an intercarrier SAW filter in front of it. The analog AFC voltage is fed to the 5-level A/D
FI1256MK2/HM/PH standard phono 3139 147 13741 FI1256MK2/HM/IEC IEC 3139 147 13751 MARKING The following items of information are printed on a sticker that is on the top cover of the tuner: · Type number · Code number · Origin letter of factory · Change code · Year and week code. INTERMEDIATE FREQUENCIES SYSTEM D/K Picture carrier Colour Sound 1 Sound 2 (if applicable) Note 1. The oscillator frequency is above the input signal frequency. CHANNEL COVERAGE BAND Low band Mid band High band CHANNELS 49.75 to 170.00 MHz 170.00 to 450.00 MHz 450.00 to 863.25 MHz FREQUENCY(1) (MHz) 38.90 34.47 32.40 32.16
1996 Jul 26
2
handbook, full pagewidth
1996 Jul 26
MIXER - OSCILLATOR IC
BLOCK DIAGRAM
Philips Components
HIGH BAND
Desktop video tuner system CCIR D/K
VCO
HIGH OSC. BAND IF VIF PLL DEMODULATOR
MID BAND MID OSC. BAND
LOW OSC. BAND
LOW BAND
3
PLL +ADC
FILTER
TRAP
AGC
DC - DC
12
11
13
14
15
24
VIF
22
23
25
MLC279 - 1
VS VT SCL SDA AS
(+5 V)
(+5 V)
2nd IF sound output
CVBS
AF sound output
Preliminary specification
FI1256 MK2
Fig.1 Electrical block diagram.
Philips Components
Preliminary specification
Desktop video tuner system CCIR D/K
PINNING SYMBOL VT VS SCL SDA AS n.c. 2nd IF CVBS VIF AF sound output - sound output PIN 11 12 13 14 15 21 22 23 24 25 TH1, TH2, TH3 and TH4 DESCRIPTION tuning voltage (monitor) supply voltage tuner section +5 V I2C-bus serial clock I2C-bus serial data I2C-bus address select not connected second IF sound output
FI1256 MK2
Composite Video Baseband Signal output supply voltage IF section +5 V AF sound output mounting tags (ground)
1996 Jul 26
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Philips Components
Preliminary specification
Desktop video tuner system CCIR D/K
LIMITING VALUES Limiting values under operational conditions The tuner can be guaranteed to function properly under the following conditions. SYMBOL VS VS(ripple) supply voltage peak-to-peak ripple voltage susceptibility (at 5 V ±5%); note 1 20 Hz to 100 kHz >100 kHz to 500 kHz IS VSCL VSDA ISDA VAS ZIF supply current SCL bus input voltage SDA bus input voltage SDA bus current (open collector) address select voltage; note 2 2nd IF sound output load impedance: DC AC ZCVBS Composite Video Baseband Signal load impedance: DC AC tL VIF VIF(ripple) load time constant IF supply voltage peak-to-peak ripple voltage susceptibility (at 5 V ±5%); note 1 20 Hz to 100 kHz >100 kHz to 500 kHz IIF ZAF IF supply current AF sound output load impedance: DC AC Notes 25 1.0 0.6 - - 23 - - - 4.75 75 75 - 5.0 22 0.5 0.5 - - 13 14 15 PARAMETER PIN MIN. 4.75 TYP. 5.00
FI1256 MK2
MAX. 5.25
UNIT V
12
- - - -0.3 -0.3 -1 -
- - - - - - -
20 10 120 +5.25 +5.25 +5 +5.25 - -
mV mV mA V V mA V k k
- - 100 5.25
ns V
24
- - -
- - -
20 10 100 - -
mV mV mA k k
1. Sinusoidal ripple voltage superimposed on the 5 V supply voltage in the frequency range of 20 Hz to 500 kHz. Criteria for TV interference >57 dB. 2. For detailed information about the address decoding, refer to Chapter "Application information".
1996 Jul 26
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