TDA8787 Datasheet, PDF (7/20 Pages) NXP Semiconductors – 10-bit, 3.0 V analog-to-digital interface for CCD cameras

Philips Semiconductors
10-bit, 3.0 V analog-to-digital interface for
CCD cameras
Preliminary specification
TDA8787
CHARACTERISTICS
V_CCA = V_CCD = 3.0 V; V_CCO = 2.6 V; f_pix = 18 MHz; T_amb = 25 °C; unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
Supplies
V_CCA
V_CCD
V_CCO
analog supply voltage
digital supply voltage
digital outputs supply
voltage
2.7
3.0
2.7
3.0
2.5
2.6
I_CCA
analog supply current
all clamps active
−
55
I_CCD
digital supply current
−
8
I_CCO
digital outputs supply
C_L = 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
V_IL
LOW-level input voltage
V_IH
HIGH-level input voltage
I_i
input current
0 ≤ V_i ≤ V_CCD
0
−
2.2
−
−2
−
Clamps
GLOBAL CHARACTERISTICS OF THE CLAMP LOOPS
t_W(clamp)
clamp active pulse width AGC code = 383 for
18
−
in number of pixels
maximum 4 LSB error
INPUT CLAMP (DRIVEN BY CLPDM)
g_m(CDS)
CDS input clamp
transconductance
OPTICAL BLACK CLAMP (DRIVEN BY CLPOB)
G_shift
gain from CPCDS1 and 2
to AGC inputs
I_LSB(cp)
charge pump current for
±1 LSB error at ADC
output
AGC code = 0
AGC code = 383
I_push(cp)
available push current of
the charge pump
I_pull(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
V_CCD V
+2
µA
−
pixels
3.5 mS
−
−
−
µA
−
µA
−
µA
−
µA
1998 Oct 15
7