TDA8787 Datasheet, PDF (8/20 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
SYMBOL
PARAMETER
CONDITIONS
Correlated Double Sampling (CDS)
V_i(CDS)(p-p)
maximum peak-to-peak
CDS input amplitude
(video signal)
V_CC = 2.85 V
V_CC ≥ 3.0 V
V_reset(max)
maximum CDS input reset
pulse amplitude
I_i(IN)
input current into pin IN at floating gate level
(pin 4)
t_CDS(min)
CDS control pulses
minimum active time
video input = V_i(CDS)(p-p);
2 LSB error at ADC output
t_h(IN-SHP)
CDS input hold time
(pin IN) compared to
control pulse SHP
V_CCA = V_CCD = 30 V;
T_amb = 25 °C; see Fig.9
t_h(IN-SHD)
CDS input hold time
(pin IN) compared to
control pulse SHD
V_CCA = V_CCD = 30 V;
T_amb = 25 °C; see Fig.9
Amplifier
DR_AGC
∆G_AGC
AGC dynamic range
maximum AGC gain step
Analog-to-Digital Converter (ADC)
LE_i
integral linearity error
f_pix = 18 MHz; ramp input
LE_d
differential linearity error f_pix = 18 MHz; ramp input
Total chain characteristics (CDS + AGC + ADC)
f_pix(max)
t_CLKH
t_CLKL
t_d(SHD-CLK)
maximum pixel frequency
CLK pulse width HIGH
CLK pulse width LOW
time delay between
SHD and CLK
see Fig.9
t_su(PBK-CLK) set-up time of PBK
compared to CLK
V_i(IN)
video input dynamic signal AGC code = 00
for ADC full-scale output _{AGC code = 383}
N_tot(rms)
total output noise (RMS
value)
see Fig.8
AGC gain = 0 dB
AGC gain = 9 dB
O_CCD(max)
maximum offset between
CCD floating level and
CCD dark pixel level
V_{n(i)(eq)(rms)} equivalent input noise
voltage (RMS value)
MIN.
650
800
500
−1
11
3
3
−
−0.3
−
−
18
15
15
10
10
800
12.7
−
−
−70
−
TYP.
−
−
−
−
15
5
5
36
−
±1.3
±0.5
−
−
−
−
−
−
−
0.25
0.8
−
110
MAX. UNIT
−
mV
−
mV
−
mV
+1
µA
−
ns
7
ns
7
ns
−
dB
+0.3 dB
±2.5 LSB
±0.9 LSB
−
MHz
−
ns
−
ns
−
ns
−
ns
−
mV
−
mV
−
LSB
−
LSB
+70 mV
−
µV
1998 Oct 15
8