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| 型號(hào)： | AD7111ACRZ-REEL |
| 廠(chǎng)商： | Analog Devices Inc |
| 文件頁(yè)數(shù)： | 1/8頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC DAC MONO MULTIPLYING 16SOIC |
| 產(chǎn)品變化通告： | AD7111A Discontinuation 27/Feb/2012 |
| 標(biāo)準(zhǔn)包裝： | 1,000 |
| 系列： | LOGDAC® |
| 位數(shù)： | 17 |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 電壓電源： | 單電源 |
| 功率耗散（最大）： | 1W |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類(lèi)型： | 表面貼裝 |
| 封裝/外殼： | 16-SOIC（0.295"，7.50mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 16-SOIC W |
| 包裝： | 帶卷 (TR) |
| 輸出數(shù)目和類(lèi)型： | 1 電流，單極 |
| 采樣率（每秒）： | * |
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
LC2MOS LOGDAC
Logarithmic D/A Converter
AD7111/AD7111A
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
FUNCTIONAL BLOCK DIAGRAMS
17-BIT DAC
17-BIT LATCH
DECODE LOGIC
8-BIT BUFFER
CONTROL LOGIC
AD7111
I OUT
AGND
R
FB
V
DD
V
IN
DGND
CS
WR
D0 – D7
17-BIT DAC
17-BIT LATCH
DECODE LOGIC
8-BIT BUFFER
CONTROL LOGIC
AD7111A
I OUT
AGND
R
FB
V
DD
V
IN
DGND
CS
WR
D0 – D7
FEATURES
Dynamic Range: 88.5 dB
Resolution: 0.375 dB
On-Chip Data Latches
+5 V Operation
AD7111A Pin Compatible with AD7524
Low Power
APPLICATIONS
Audio Attenuators
Sonar Systems
Function Generators
Digitally Controlled AGC System
GENERAL DESCRIPTION
The LOGDAC AD7111/AD7111A are monolithic multiplying
D/A converters featuring wide dynamic range in a small pack-
age. Both DACs can attenuate an analog input signal over the
range 0 dB to 88.5 dB in 0.375 dB steps. They are available in
16-pin DIPs and SOIC packages. The AD7111 is also available
in a 20-terminal LCCC package.
The degree of attenuation across the DAC is determined by an
8-bit word applied to the onboard decode logic. This 8-bit word
is decoded into a 17-bit word which is then applied to a 17-bit
R-2R ladder. The very fine step resolution, which is available
over the entire dynamic range, is due to the use of this 17-bit
DAC.
The AD7111/AD7111A are easily interfaced to a standard 8-bit
MPU bus via an 8-bit data port and standard microprocessor
control lines. The AD7111 WR input is edge triggered and re-
quires a rising edge to load new data to the DAC. The AD7111A
WR
is level triggered to allow transparent operation of the
latches, if required. It should also be noted that the AD7111A is
exactly pin and function-compatible with the AD7524, an in-
dustry standard 8-bit multiplying DAC. This allows an easy up-
grading of existing AD7524 designs which would benefit both
from the wider dynamic range and the finer step resolution of-
fered by the AD7111A.
The AD7111/AD7111A are fabricated in Linear Compatible
CMOS (LC
2MOS), an advanced, mixed technology process that
combines precision bipolar circuits with low power CMOS logic.
LOGDAC is a registered trademark of Analog Devices, Inc.
PRODUCT HIGHLIGHTS
1. Wide Dynamic Range: 0 dB to 88.5 dB attenuation range in
0.375 dB steps.
2. Small Package: The AD7111/AD7111A are available in
16-pin DIPs and SOIC packages.
3. Transparent Latch Operation: By tying the CS and WR in-
puts low, the DAC latches in the AD7111A can be made
transparent.
4. Fast Microprocessor Interface: Data setup times of 25 ns and
write pulse width of 57 ns make the AD7111A compatible
with modern microprocessors.
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