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參數(shù)資料
| 型號(hào)： | AD7769JN |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | LC2MOS Analog I/O Port |
| 中文描述： | 2-CH 8-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PDIP28 |
| 封裝： | PLASTIC, DIP-28 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大小： | 265K |
| 代理商： | AD7769JN |
REV. A
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
LC
2
MOS
Analog I/OPort
AD7769
FUNCT IONAL BLOCK DIAGRAM
PRODUCT HIGHLIGHT S
1. T wo-Channel, 8-Bit Analog I/O port on a Single Chip.
T he AD7769 contains a two-channel, high speed ADC with
input signal conditioning and two, fast settling 8-bit DACs
with output amplifiers, on a single chip.
2. Independent Control of Span and Offset.
T he input voltage span of the ADC and the midpoint of the
transfer function, the output voltage swing of the two DACs
and the half-scale output voltage, can be set independently
by applying ground referenced control voltages.
3. Dynamic Specifications for DSP Users.
In addition to the traditional ADC and DAC specifications,
the AD7769 is specified with ac parameters including signal-
to-noise ratio, distortion and signal bandwidth.
4. Fast Microprocessor Interface.
T he AD7769 has bus interface timing compatible with all
modern microprocessors, with bus access and relinquish
times less than 65 ns and a Write pulse width less than 90 ns.
FEATURES
Two-Channel, 8-Bit 2.5
m
s ADC
Two 8-Bit, 2.5
m
s DACs with Output Amplifiers
Span and Offset of ADC and DAC
Independently Adjustable
Low Power
APPLICATIONS
Winchester Disk Servo Controllers
Floppy Disk Microstepping
Closed Loop Servo Systems
GE NE RAL DE SCRIPT ION
T he AD7769 is a complete, two-channel, 8-bit, analog I/O port.
It has versatile input and output signal conditioning features
that make it ideal for use in head-positioning servos in Winches-
ter disk systems. It is equally suitable for floppy disk microstep-
ping head positioning, other closed loop digital servo systems
and general purpose 8-bit data acquisition.
T he AD7769 contains a high speed successive approximation
ADC, preceded by a two-channel multiplexer and signal condi-
tioning circuits. T he input span of the ADC and the offset of
the zero point from ground can be independently set by apply-
ing ground referenced voltages. T he AD7769 also contains two
independent, fast settling, 8-bit DACs with output amplifiers.
T he output span and offset voltage of the DACs can be set inde-
pendently of those of the ADC. T his makes the AD7769 espe-
cially useful in disk drives, where only a positive supply rail is
available and the ranges of the ADC and DACs must be refer-
enced to some positive voltage less than the supply.
T he AD7769 is easily interfaced to a standard 8-bit mpu bus via
an 8-bit data port and standard microprocessor control lines.
T he AD7769 is fabricated in Linear Compatible CMOS
(LC
2
MOS), an advanced, mixed technology process that com-
bines precision bipolar circuits with low power CMOS logic.
T he part is available in a 28-lead plastic DIP and 28-terminal
PLCC package.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106,U.S.A.
Tel: 617/329-4700
World Wide Web Site: http://www.analog.comFax:
617/326-8703
Analog Devices, Inc., 1997
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD7769JP | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| AD7769JP-REEL | 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel |
| AD7769KN | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CODEC， Single |
| AD7769KP | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CODEC， Single |
| AD776AQ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog-to-Digital Converter， 16-Bit |
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