TDA8708A Datasheet, PDF (2/24 Pages) NXP Semiconductors – Video analog input interface

Philips Semiconductors
Video analog input interface
Product specification
TDA8708A
FEATURES
• 8-bit resolution
• Sampling rate up to 32 MHz
• Binary or two's complement 3-state TTL outputs
• TTL-compatible digital inputs and outputs
• Internal reference voltage regulator
• Power dissipation of 365 mW (typical)
• Input selector circuit (one out of three video inputs)
• Clamp and Automatic Gain Control (AGC) functions for
CVBS and Y signals
• No sample-and-hold circuit required.
• The TDA8708A has white peak control in modes 1 and
2 whereas the TDA8708B has control in mode 1 only.
APPLICATIONS
• Video signal decoding
• Scrambled TV (encoding and decoding)
• Digital picture processing
• Frame grabbing.
GENERAL DESCRIPTION
The TDA8708A is an analog input interface for video signal
processing. It includes a video amplifier with clamp and
gain control, an 8-bit analog-to-digital converter (ADC)
with a sampling rate of 32 MHz and an input selector.
QUICK REFERENCE DATA
SYMBOL
V_CCA
V_CCD
V_CCO
I_CCA
I_CCD
I_CCO
ILE
DLE
f_clk(max)
B
P_tot
PARAMETER
analog supply voltage
digital supply voltage
TTL output supply voltage
analog supply current
digital supply current
TTL output supply current
DC integral linearity error
DC differential linearity error
maximum clock frequency
maximum −3 dB bandwidth (AGC amplifier)
total power dissipation
MIN.
4.5
4.5
4.2
−
−
−
−
−
30
12
−
TYP.
5.0
5.0
5.0
37
24
12
−
−
32
18
365
MAX.
5.5
5.5
5.5
45
30
16
±1
±0.5
−
−
500
UNIT
V
V
V
mA
mA
mA
LSB
LSB
MHz
MHz
mW
ORDERING INFORMATION
TYPE NUMBER
TDA8708A
TDA8708AT
PINS
28
28
PACKAGE
PIN POSITION
MATERIAL
DIP
SO28L
plastic
plastic
CODE
SOT117-1
SOT136-1
June 1994
2