参数资料
型号: CDS-1402MC
厂商: MURATA POWER SOLUTIONS INC
元件分类: 取样保持放大器
中文描述: SAMPLE AND HOLD AMPLIFIER, 0.06 us ACQUISITION TIME, CDIP24
封装: CERAMIC, DDIP-24
文件页数: 1/8页
文件大小: 203K
代理商: CDS-1402MC
FEATURES
Use with 10 to 14-bit A/D converters
5 Megapixels/second minimum throughput (14 bits)
±2.5V input/output ranges, Gain = –1
Low noise, 200Vrms
Two independent S/H amplifiers
Gain matching between S/H's
Offset adjustments for each S/H
Four external A/D control lines
Small package, 24-pin ceramic DDIP
Low power, 350mW
Low cost
GENERAL DESCRIPTION
The CDS-1402 is an application-specific, correlated double
sampling (CDS) circuit designed for electronic-imaging
applications that employ CCD's (charge coupled devices) as
their photodetector. The CDS-1402 has been optimized for
use in digital video applications that employ 10 to 14-bit A/D
converters. The low-noise CDS-1402 can accurately
determine each pixel's true video signal level by sequentially
sampling the pixel's offset signal and its video signal and
subtracting the two. The result is that the consequences of
residual charge, charge injection and low-frequency "kTC"
noise on the CCD's output floating capacitor are effectively
eliminated. The CDS-1402 can also be used as a dual
sample-hold amplifier in a data acquisition system.
The CDS-1402 contains two sample-hold amplifiers and
appropriate support/control circuitry. Features include
independent offset-adjust capability for each S/H,
adjustment for matching gain between the two S/H's,
CDS-1402
14-Bit, Very Fast Settling
Correlated Double Sampling Circuit
Figure 1. CDS-1402 Functional Block Diagram
(continued on page 3)
DATEL, Inc., 11 Cabot Boulevard, Mansfield, MA 02048-1151 (U.S.A.)
Tel: (508) 339-3000 Fax: (508) 339-6356 For immediate assistance: (800) 233-2765
S/H 2
OFFSET ADJUST V1
1
DO NOT CONNECT
2
ANALOG INPUT 1
3
OFFSET ADJUST V2 9
DO NOT CONNECT 10
ANALOG INPUT 2
4
S/H1 COMMAND 11
S/H2 COMMAND 12
5, 14, 21, 23
ANALOG GROUND
24
+5V ANALOG
SUPPLY
16
+5V DIGITAL
SUPPLY
15
DIGITAL
GROUND
7
S/H1 ROUT
8
S/H2
SUMMING NODE
22 V OUT
18 A/D CLOCK 1
6
S/H1 OUT
OPTIONAL
17 A/D CLOCK 1
19 A/D CLOCK 2
20 A/D CLOCK 2
100k
100k
450
500
13
–5V ANALOG
SUPPLY
+
S/H 1
+
500
500
500
50
CH
1
OFFSET ADJUST V1
2
DO NOT CONNECT
3
ANALOG INPUT 1
4
ANALOG INPUT 2
5
ANALOG GROUND
6
S/H1 OUT
7
S/H1 ROUT
8
S/H2 SUMMING NODE
9
OFFSET ADJUST V2
10
DO NOT CONNECT
11
S/H1 COMMAND
12
S/H2 COMMAND
24
+5V ANALOG SUPPLY
23
ANALOG GROUND
22
V OUT
21
ANALOG GROUND
20
A/D CLOCK2
19
A/D CLOCK2
18
A/D CLOCK1
17
A/D CLOCK1
16
+5V DIGITAL SUPPLY
15
DIGITAL GROUND
14
ANALOG GROUND
13
–5V ANALOG SUPPLY
PIN
FUNCTION
PIN
FUNCTION
and four control lines for triggering the A/D converter used in
conjunction with the CDS-1402. The CDS circuit's "ping-
pong" timing approach (the offset signal of the "n+1" pixel can
be acquired while the video output of the "nth" pixel is being
converted) guarantees a minimum throughput, in a 14-bit
application, of 5MHz. In other words, the true video signal
(minus offset) will be available
INPUT/OUTPUT CONNECTIONS
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