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PDF CXA1690Q Data sheet ( Hoja de datos )
| Número de pieza | CXA1690Q | |
| Descripción | Head Amplifier for Digital CCD Cameras | |
| Fabricantes | Sony Corporation | |
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CXA1690Q
Head Amplifier for Digital CCD Cameras
Description
The CXA1690Q is a bipolar IC developed as a
head amplifier for digital CCD cameras. The
CXA1690Q provides the following functions:
correlated double sampling, AGC for CCD signals,
GCA for chroma signals, GCA for line signals,
sample and hold for A/D converters, blanking, and
reference voltage output/output driver for A/D
converters.
Features
• Permits higher sensitivity with a high-gain AGC
amplifier
• Blanking function for the purpose of calibrating the
deviation in black levels of the CCD output signals
• Permits output offset adjustment
• Provides a regulator output pin for the reference
voltage for A/D converters
• Built-in GCA that amplifies video signals (chroma
and line signals) from an external source
• Built-in sample-and-hold circuits (for both camera
signals and video signals) required by external A/D
converters
32 pin QFP (Plastic)
Structure
Bipolar silicon monolithic IC
Applications
Digital CCD cameras
Absolute Maximum Ratings
• Supply voltage
• Operating temperature
• Storage temperature
• Allowable power dissipation
VCC
Topr
Tstg
PD
14 V
–20 to +75 °C
–65 to +150 °C
460 mW
Operating Conditions
Supply voltage
VCC1, 2, 3 4.5 to 5
V
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
–1–
E93X02A8X-PS
1 page  
CXA1690Q
Pin
No.
Symbol
Pin voltage
Equivalent circuit
12
OFFSET
Vcc
to
20
50
Vcc
127
1k
125k
39µA
39µA
13 PBLK
VTH
=
18
50
Vcc
62k
34k 24k
46µA
127
1k
14 XRS
21 SHP
22 SHD
VTH
=
22
50
Vcc
VTH
=
25
50
Vcc
Sampling
200
127
200
Description
This pin offset adjusts the
CLPDRV black level when
the CXA1690 satisfies the
operating conditions for the
camera signal system
54k (when CAMVI is High and
PBREC is Low).
VCC: approx. 500mV
20/50 VCC: approx.
–50mV
Preset: approx. 70mV
47k
500
70
20
50
VCC
0 VCC
–50
OFFSET voltage (V)
Pulse input for BLK
(active: Low). This pin
functions only when
CAMVI is High and
PBREC is Low, and
calibrates the black
level of the AGC
output waveform.
When the pulse is low,
the DRVOUT potential
is forced to 2V.
High-speed S/H pulse
input for CAMSH
(active: Low).
High-speed S/H pulse
input for SH1
(active: Low).
High-speed S/H pulse
input for SH2 and SH3
(active: Low).
15 CLPOB
VTH
=
18
50
Vcc
1k
127
100µ
Clamp pulse input for
AGCCLP
(active: Low).
–5–
5 Page 
CXA1690Q
– 11 –
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| PDF Descargar | [ Datasheet CXA1690Q.PDF ] | |
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