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參數資料
| 型號： | ADC12662CIV |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | ADC |
| 英文描述： | 12-Bit, 1.5 MHz, 200 mW A/D Converter with Input Multiplexer and Sample/Hold |
| 中文描述： | 2-CH 12-BIT FLASH METHOD ADC, PARALLEL ACCESS, PQCC44 |
| 封裝： | PLASTIC, LCC-44 |
| 文件頁數： | 1/23頁 |
| 文件大?。?/td> | 495K |
| 代理商： | ADC12662CIV |
ADC12662
12-Bit, 1.5 MHz, 200 mW A/D Converter
with Input Multiplexer and Sample/Hold
General Description
Using an innovative multistep conversion technique, the
12-bit ADC12662 CMOS analog-to-digital converter digitizes
signals at a 1.5 MHz sampling rate while consuming a maxi-
mum of only 200 mW on a single +5V supply. The
ADC12662
performs
a
12-bit
conversion
lower-resolution “flash” conversions, yielding a fast A/D with-
out the cost and power dissipation associated with true flash
approaches.
The analog input voltage to the ADC12662 is tracked and
held by an internal sampling circuit, allowing high frequency
input signals to be accurately digitized without the need for
an external sample-and-hold circuit. TheADC12662 features
two sample-and-hold/flash comparator sections which allow
the converter to acquire one sample while converting the
previous. This pipelining technique increases conversion
speed without sacrificing performance. The multiplexer out-
put is available to the user in order to perform additional
external signal processing before the signal is digitized.
When the converter is not digitizing signals, it can be placed
in the Standby mode; typical power consumption in this
mode is 250 μW.
in
three
Features
n
Built-in sample-and-hold
n
Single +5V supply
n
Single channel or 2 channel multiplexer operation
n
Low Power Standby mode
Key Specifications
n
Sampling rate
n
Conversion time
n
Signal-to-Noise Ratio, f
IN
= 100 kHz
n
Power consumption (f
s
= 1.5 MHz)
n
No missing codes over temperature
1.5 MHz (min)
580 ns (typ)
67.5 dB (min)
200 mW (max)
Guaranteed
Applications
n
Digital signal processor front ends
n
Instrumentation
n
Disk drives
n
Mobile telecommunications
n
Waveform digitizers
ADC12662 Block Diagram
01187601
Ordering Information
Industrial (40C
≤
T
A
≤
+85)
ADC12662CIV
ADC12662CIVF
Package
V44 Plastic Leaded Chip Carrier
VGZ44A Plastic Quad Flat Package
June 2001
A
2001 National Semiconductor Corporation
DS011876
www.national.com
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