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TDA8786A View Datasheet(PDF) - Philips Electronics

Part NameTDA8786A Philips
Philips Electronics Philips
Description10-bit analog-to-digital interface for CCD cameras.
TDA8786A Datasheet PDF : 28 Pages
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Philips Semiconductors
10-bit analog-to-digital interface for
CCD cameras
Product specification
TDA8786; TDA8786A
PINNING
SYMBOL
CLPOPB
PBK
OFDOUT
AMPOUT
AGND1
VCCA1
AGCOUT
PBIN
PBOUT
ADCIN
CLPADC
Vref
DACOUT
AGND2
VCCA2
VRB
VRT
DEC1
STGE
SDATA
SCLK
SEN
STDBY
VCCD1
DGND1
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
OGND
PIN
DESCRIPTION
1 optical black clamp control pulse input (active HIGH for TDA8786, active LOW for TDA8786A)
2 pre-blanking control pulse input; if PBK is HIGH (LOW) the signal is replaced by the optical
black level for TDA8786 (TDA8786A)
3 analog output of the additional 8-bit control DAC (controlled via the serial interface)
4 CDS amplifier output (fixed gain = +6 dB)
5 analog ground 1
6 analog supply voltage 1
7 AGC and soft clipper amplifier signal output
8 optical black clamp and pre-blanking block signal input (from AGCOUT via a capacitor)
9 optical black clamp and pre-blanking block signal output
10 ADC analog signal input (from PBOUT or AGCOUT via a capacitor)
11 clamp control input for ADC analog input signal clamp (active HIGH for TDA8786 and active
LOW for TDA8786A)
12 ADC input clamp reference voltage (normally connected to pin VRB or DACOUT)
13 DAC output for ADC clamp level
14 analog ground 2
15 analog supply voltage 2
16 ADC reference voltage (BOTTOM) code 0
17 ADC reference voltage (TOP) code 1023
18 decoupling 1 (decoupled to ground via a capacitor)
19 CDS offset storage
20 serial data input for the 4 control DACs (9-bit DAC for AGC gain, 4-bit DAC for soft clipper;
additional 8-bit DAC for OFD output voltage; 10-bit DAC for ADC clamp level and the stand-by
mode per block; see Table 1)
21 serial clock input for the control DACs and their serial interface; see Table 1
22 enable input for the serial interface shift register (active when SEN = logic 0); see Table 1
23 stand-by control pin (active HIGH); all the output bits are logic 0 when stand-by is enabled
24 digital supply voltage 1
25 digital ground 1
26 ADC digital output 0 (LSB)
27 ADC digital output 1
28 ADC digital output 2
29 ADC digital output 3
30 ADC digital output 4
31 ADC digital output 5
32 ADC digital output 6
33 ADC digital output 7
34 ADC digital output 8
35 ADC digital output 9 (MSB)
36 digital output ground
1997 Nov 17
4
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The TDA8786; TDA8786A is a 10-bit analog-to-digital interface for CCD cameras. The device includes a correlated double sampling circuit, AGC, a soft clipper circuit and a low power 10-bit Analog-to-Digital Converter (ADC) together with its reference voltage regulator.

The AGC and soft clipper circuits are controlled by on-chip DACs via a serial interface.
A 10-bit DAC controls the ADC input clamp level. A pre-blanking function is also included.
An additional DAC is provided for additional system controls; its output voltage range is 1.4 V (p-p) which is available at pin OFDOUT.

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