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參數(shù)資料
| 型號： | AD775 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 8-Bit 20 MSPS, 60 mW Sampling A/D Converter(8位,20MSPS 60mW采樣A/D轉(zhuǎn)換器) |
| 中文描述： | 8位20 MSPS的60毫瓦采樣A / D轉(zhuǎn)換器（8位，20MSPS 60mW的采樣的A / D轉(zhuǎn)換器） |
| 文件頁數(shù)： | 1/12頁 |
| 文件大小： | 343K |
| 代理商： | AD775 |
FUNCT IONAL BLOCK DIAGRAM
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
a
8-Bit 20 MSPS, 60 mW
Sampling A/DConverter
AD775
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
FEATURES
CMOS 8-Bit 20 MSPS Sampling A/D Converter
Low Power Dissipation: 60 mW
+5 V Single Supply Operation
Differential Nonlinearity: 0.3 LSB
Differential Gain: 1%
Differential Phase: 0.5 Degrees
Three-State Outputs
On-Chip Reference Bias Resistors
Adjustable Reference Input
Video Industry Standard Pinout
Small Packages:
24-Pin 300 Mil SOIC Surface Mount
24-Pin 400 Mil Plastic DIP
PRODUCT DE SCRIPT ION
T he AD775 is a CMOS, low power, 8-bit, 20 MSPS sampling
analog-to-digital converter (ADC). T he AD775 features a built-
in sampling function and on-chip reference bias resistors to pro-
vide a complete 8-bit ADC solution. T he AD775 utilizes a
pipelined/ping pong two-step flash architecture to provide high
sampling rates (up to 35 MHz) while maintaining very low
power consumption (60 mW).
Its combination of excellent DNL, fast sampling rate, low dif-
ferential gain and phase errors, extremely low power dissipation,
and single +5 V supply operation make it ideally suited for a
variety of video and image acquisition applications, including
portable equipment. T he AD775’s reference ladder may be con-
nected in a variety of configurations to accommodate different
input ranges. T he low input capacitance (11 pF typical) provides
an easy-to-drive input load compared to conventional flash
converters.
T he AD775 is offered in both 300 mil SOIC and 400 mil DIP
plastic packages, and is designed to operate over an extended
commercial temperature range (–20
°
C to +75
°
C).
PRODUCT HIGHLIGHT S
Low Power: T he AD775 has a typical supply current of 12 mA,
for a power consumption of 60 mW. Reference ladder current
is also low: 6.6 mA typical, minimizing the reference power
consumption.
Complete Solution: T he AD775’s switched capacitor design
features an inherent sample/hold function: no external SHA is
required. On-chip reference bias resistors are included to allow
a supply-based reference to be generated without any external
resistors.
Excellent Differential Nonlinearity: T he AD775 features a
typical DNL of 0.3 LSBs, with a maximum limit of 0.5 LSBs.
No missing codes is guaranteed.
Single +5 V Supply Operation: T he AD775 is designed to oper-
ate on a single +5 V supply, and the reference ladder may be
configured to accommodate analog inputs inclusive of ground.
Low Input Capacitance: T he 11 pF input capacitance of the
AD775 can significantly decrease the cost and complexity of
input driving circuitry, compared with conventional 8-bit flash
ADCs.
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CLOCK LOGIC
FINE COMPARATORS
BANK B
FINE COMPARATORS
BANK A
COARSE
COMPARATORS
C
AV
DD
AV
SS
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D7 (MSB)
D0 (LSB)
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RTS
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RBS
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AD775
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