TDA8787 datasheet(8/20 Pages) PHILIPS

8 / 20 page

1998 Oct 15

Philips Semiconductors

Preliminary speciﬁcation

10-bit, 3.0 V analog-to-digital interface for

CCD cameras

TDA8787

Correlated Double Sampling (CDS)

Vi(CDS)(p-p)

maximum peak-to-peak

CDS input amplitude

(video signal)

VCC = 2.85 V

650

−−

VCC ≥ 3.0 V

800

−−

Vreset(max)

maximum CDS input reset

pulse amplitude

500

−−

Ii(IN)

input current into pin IN

(pin 4)

at ﬂoating gate level

−1

−

µA

tCDS(min)

CDS control pulses

minimum active time

video input = Vi(CDS)(p-p);

2 LSB error at ADC output

−

th(IN-SHP)

CDS input hold time

(pin IN) compared to

control pulse SHP

VCCA =VCCD =30V;

Tamb =25 °C; see Fig.9

th(IN-SHD)

CDS input hold time

(pin IN) compared to

control pulse SHD

VCCA =VCCD =30V;

Tamb =25 °C; see Fig.9

Ampliﬁer

DRAGC

AGC dynamic range

−

∆G

AGC

maximum AGC gain step

−0.3

−

+0.3

Analog-to-Digital Converter (ADC)

LEi

integral linearity error

fpix = 18 MHz; ramp input

−±1.3

±2.5

LSB

LEd

differential linearity error

fpix = 18 MHz; ramp input

−±0.5

±0.9

LSB

Total chain characteristics (CDS + AGC + ADC)

fpix(max)

maximum pixel frequency

−−

MHz

tCLKH

CLK pulse width HIGH

−−

tCLKL

CLK pulse width LOW

−−

td(SHD-CLK)

time delay between

SHD and CLK

see Fig.9

−−

tsu(PBK-CLK)

set-up time of PBK

compared to CLK

−−

Vi(IN)

video input dynamic signal

for ADC full-scale output

AGC code = 00

800

−−

AGC code = 383

12.7

−−

Ntot(rms)

total output noise (RMS

value)

see Fig.8

AGC gain=0dB

−

0.25

−

LSB

AGC gain=9dB

−

0.8

−

LSB

OCCD(max)

maximum offset between

CCD ﬂoating level and

CCD dark pixel level

−70

−

+70

Vn(i)(eq)(rms)

equivalent input noise

voltage (RMS value)

−

110

−µV

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

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