TDA8787 查看數據表（PDF） - Philips Electronics
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TDA8787 Datasheet PDF : 20 Pages
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Philips Semiconductors
10-bit, 3.0 V analog-to-digital interface for
CCD cameras
Preliminary specification
TDA8787
CHARACTERISTICS
VCCA = VCCD = 3.0 V; VCCO = 2.6 V; fpix = 18 MHz; Tamb = 25 °C; unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
Supplies
VCCA
VCCD
VCCO
analog supply voltage
digital supply voltage
digital outputs supply
voltage
2.7
3.0
2.7
3.0
2.5
2.6
ICCA
analog supply current
all clamps active
−
55
ICCD
digital supply current
−
8
ICCO
digital outputs supply
CL = 20 pF on all data
−
1
current
outputs; input ramp
frequency
Digital inputs
INPUTS: SHP, SHD, STDBY, CLPDM, CLPOB, SCLK, SDATA, SEN, VSYNC, OE AND PBK
VIL
LOW-level input voltage
VIH
HIGH-level input voltage
Ii
input current
0 ≤ Vi ≤ VCCD
0
−
2.2
−
−2
−
Clamps
GLOBAL CHARACTERISTICS OF THE CLAMP LOOPS
tW(clamp)
clamp active pulse width AGC code = 383 for
18
−
in number of pixels
maximum 4 LSB error
INPUT CLAMP (DRIVEN BY CLPDM)
gm(CDS)
CDS input clamp
transconductance
OPTICAL BLACK CLAMP (DRIVEN BY CLPOB)
Gshift
gain from CPCDS1 and 2
to AGC inputs
ILSB(cp)
charge pump current for
±1 LSB error at ADC
output
AGC code = 0
AGC code = 383
Ipush(cp)
available push current of
the charge pump
Ipull(cp)
available pull current of
the charge pump
1.5
2.7
−
0.27
−
±350
−
±10
−
650
−
−650
MAX. UNIT
3.6 V
3.6 V
3.6 V
70
mA
11
mA
2
mA
0.6 V
VCCD V
+2
µA
−
pixels
3.5 mS
−
−
−
µA
−
µA
−
µA
−
µA
1998 Oct 15
7
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