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參數(shù)資料
| 型號： | 935250320551 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PQFP48 |
| 封裝： | PLASTIC, LQFP-48 |
| 文件頁數(shù)： | 12/31頁 |
| 文件大?。?/td> | 186K |
| 代理商： | 935250320551 |
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1997 Nov 17
2
Philips Semiconductors
Product specication
10-bit analog-to-digital interface for
CCD cameras
TDA8786; TDA8786A
FEATURES
Correlated Double Sampling (CDS), AGC, soft clipper,
pre-blanking, 10-bit ADC and reference regulator
included
Fully programmable via a 3-wire serial interface
Sampling frequency up to 18 MHz
AGC gain from 3.5 to 33.5 dB (in 0.1 dB steps)
Programmable soft clipper for white compression
(starting at 40% of the input signal)
Standby mode available for each block for power saving
applications (19 mW)
6 dB fixed gain analog output for analog iris control
8-bit and 10-bit DAC included for analog settings
Low power consumption of only 475 mW (typ.)
5 V operation and 2.5 to 5 V operation for the digital
outputs
CDS control pulse: TDA8786 = HIGH;
TDA8786A = LOW
TTL compatible inputs, TTL and CMOS compatible
outputs.
GENERAL DESCRIPTION
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.
APPLICATIONS
CCD camera systems.
QUICK REFERENCE DATA
ORDERING INFORMATION
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
VCCA
analog supply voltage
4.5
4.75
5.5
V
VCCD
digital supply voltage
4.5
4.75
5.5
V
VCCO
digital outputs supply voltage
2.5
2.6
5.5
V
ICCA
analog supply current
83
mA
ICCD
digital supply current
16
mA
ICCO
digital outputs supply current
fCLK = 18 MHz;
CL = 20 pF; ramp input
1
mA
ADCres
ADC resolution
10
bits
Vi(CDS)(p-p)
CDS input voltage (peak-to-peak value)
400
1200
mV
GCDS
CDS output amplier gain
6
dB
fCLK(max)
maximum clock frequency
18
MHz
AGCdyn
AGC dynamic range
30
dB
Ntot(rms)
total noise from CDS input to ADC
output (RMS value)
gain = 3.5 dB
0.5
LSB
Ptot
total power consumption
475
mW
TYPE
NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
TDA8786G
LQFP48
plastic low prole quad at package; 48 leads; body 7
× 7 × 1.4 mm
SOT313-2
TDA8786AG
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