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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 speciļ¬cation
TDA8786; TDA8786A
Table 1 Serial interface programming (see note 1)
ADDRESS BITS
A2
A1
A0
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
DATA BITS D9 to D0
OFDOUT output control (D7 to D0).
Soft clipper control. Only the 4 LSBs (D3 to D0) are used. Bits D9 to D4 should be set to
logic 0.
AGC gain control (D8 to D0).
Partial standby controls for power consumption optimization. Only the 4 LSBs (D3 to D0)
are used. Bits D9 to D4 should be set to logic 0:
D0 = 1: CDS + AGC + soft clipper block in standby; ICCA + ICCD = 48 mA
D1 = 1: optical black clamp + blanking block in standby; ICCA + ICCD = 92 mA
D2 = 1: OFD DAC in standby; ICCA + ICCD = 98 mA
D3 = 1: 6 dB amplifier (output on AMPOUT pin) in standby; ICCA + ICCD = 98.5 mA.
Clamp reference DAC (D9 to D0).
Note
1. At the end of each programming sequence (usually during the video vertical blanking), the soft clipper register must
be reloaded (for example if the soft clipper is not used, code 15 must be entered in the soft clipper register at the end
of each TDA8786(A) programming sequence).
Table 2 Standby selection
STDBY
1
0
D9 to D0
LOW
active
ICCA + ICCD
4 mA (typ.)
99 mA (typ.)
1997 Nov 17
17
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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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