TDA8822T Ver la hoja de datos (PDF) - Philips Electronics
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TDA8822T Datasheet PDF : 28 Pages
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Philips Semiconductors
Universal I2C-bus programmable RF
modulator
Preliminary specification
TDA8822
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
XTAL characteristics
|ZXTAL|
XTAL input impedance
absolute value;
600
1200 −
Ω
with a 4 MHz crystal
Output Port characteristics
VPORT
IPORT(lk)
IPORT(sink)
low voltage
off-state leakage current
sinking current in the port
port on; IPORT = 10 mA −
port off; VCCD = 5.5 V
−
port on
10
150 400
mV
−
10
µA
−
−
mA
TPSG pin characteristics
VTPSG(on) voltage on pin TPSG to switch the
TPSG on
0
−
1.5
V
VTPSG(off) voltage on pin TPSG to switch the
TPSG off
3.0
−
VCCD
V
ITPSGL
ITPSGH
ITPSG(sink)
LOW input current in pin TPSG
HIGH input current in pin TPSG
output sinking current in pin TPSG
TPSG to DGND
TPSG to VCCD
TPSG set on using
I2C-bus
−100 −
−
−
10
−
−
µA
100
µA
−
mA
VTPSG(sink) voltage on pin TPSG used as output TPSG set on using
−
150 400
mV
I2C-bus
I2C-bus receiver characteristics, pins SCL and SDA
fSCL
frequency on SCL line
−
−
VIH
HIGH level input voltage
3
−
VIL
LOW level input voltage
0
−
IIH
HIGH level input current
VIH = 5 V; VCCD = 0 or 5 V −
−
IIL
LOW level input current
VIL = 0 V; VCCD = 0 or 5 V −10
−
VSDA(ack) acknowledge output voltage on SDA during acknowledge
−
−
pulse; IIL = 3 mA
100
kHz
5.5
V
1.5
V
10
µA
−
µA
0.4
V
Notes
1. Ratio between the CCIR 17-line bar amplitude (corresponding to the level difference between black and white;
see Fig.4) and the RMS value of the noise on a black line (line 22 or 335) measured on the video signal after
demodulation. Measurement is done for frequencies between 200 kHz and 5 MHz. Measurement is unweighted.
2. Measured on CCIR 330 line, corresponding to a 5-step staircase with a chroma carrier of amplitude equal to 0.3
times the voltage between sync pulse and white (see Fig.5). The video signal is 500 mV (p-p). The modulation depth
is adjusted using the I2C-bus to MD setting = 4 (82.5% typical modulation depth).
3. Measured with a spectrum analyser with ‘peak hold’ function, applying a 500 mV (p-p) sine wave at the video input
of the IC, with a sweeping frequency between 0.5 and 6.0 MHz. The reference is the value measured at 1.0 MHz.
4. To have a deviation between 50 and 250 kHz, the audio frequency must be higher than 100 Hz.
5. Measured with an audio frequency of 1 kHz with a level adjusted to get a deviation of 50 kHz with DEV setting = 2,
using CCIR 468-3 weighting filter, with a quasi-peak detection. The input signal has pre-emphasis and the receiver
has de-emphasis. Video signal is 500 mV (p-p) EBU colour bars on pin VIDEO.
1997 Jan 08
16
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