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參數(shù)資料
| 型號： | AD8802 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 12 Channel, 8-Bit TrimDACs with Power Shutdown |
| 中文描述： | 12通道，8位與電源關(guān)斷TrimDACs |
| 文件頁數(shù)： | 1/16頁 |
| 文件大?。?/td> | 432K |
| 代理商： | AD8802 |
FUNCTIONAL BLOCK DIAGRAM
CS
CLK
SDI
SHDN
AD8802/AD8804
D7
D0
ADDR
DEC
EN
D11
D10
D9
D8
D7
SER
REG
D
D0
DAC
REG
#1
R
V
DD
V
REFH
D7
D0
12
DAC
REG
#12
R
D1
8
O1
O2
O3
O4
O5
O6
O7
O8
O9
O10
O11
O12
GND
RS
(AD8802 ONLY)
V
(AD8804 ONLY)
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
12 Channel, 8-Bit TrimDACs
with Power Shutdown
AD8802/AD8804
Analog Devices, Inc., 1995
One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
GENERAL DESCRIPTION
The 12-channel AD8802/AD8804 provides independent digitally-
controllable voltage outputs in a compact 20-lead package. This
potentiometer divider TrimDAC allows replacement of the
mechanical trimmer function in new designs. The AD8802/
AD8804 is ideal for dc voltage adjustment applications.
Easily programmed by serial interfaced microcontroller ports,
the AD8802 with its midscale preset is ideal for potentiometer
replacement where adjustments start at a nominal value. Appli-
cations such as gain control of video amplifiers, voltage con-
trolled frequencies and bandwidths in video equipment,
geometric correction and automatic adjustment in CRT com-
puter graphic displays are a few of the many applications ideally
suited for these parts. The AD8804 provides independent con-
trol of both the top and bottom end of the potentiometer divider
allowing a separate zero-scale voltage setting determined by the
V
REFL
pin. This is helpful for maximizing the resolution of
devices with a limited allowable voltage control range.
Internally the AD8802/AD8804 contains 12 voltage-output
digital-to-analog converters, sharing a common reference-
voltage input.
TrimDAC is a registered trademark of Analog Devices, Inc.
FEATURES
Low Cost
Replaces 12 Potentiometers
Individually Programmable Outputs
3-Wire SPI Compatible Serial Input
Power Shutdown <55
m
Watts Including I
DD
& I
REF
Midscale Preset, AD8802
Separate V
REFL
Range Setting, AD8804
+3 V to +5 V Single Supply Operation
APPLICATIONS
Automatic Adjustment
Trimmer Replacement
Video and Audio Equipment Gain and Offset Adjustment
Portable and Battery Operated Equipment
Each DAC has its own DAC latch that holds its output state.
These DAC latches are updated from an internal serial-to-
parallel shift register that is loaded from a standard 3-wire
serial input digital interface. The serial-data-input word is
decoded where the first 4 bits determine the address of the DAC
latches to be loaded with the last 8 bits of data. The AD8802/
AD8804 consumes only 10
μ
A from 5 V power supplies. In ad-
dition, in shutdown mode reference input current consumption
is also reduced to 10
μ
A while saving the DAC latch settings for
use after return to normal operation.
The AD8802/AD8804 is available in the 20-pin plastic DIP, the
SOIC-20 surface mount package, and the 1 mm thin TSSOP-20
package.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD8802AN | 12 Channel, 8-Bit TrimDACs with Power Shutdown |
| AD8802AR | 12 Channel, 8-Bit TrimDACs with Power Shutdown |
| AD8802ARU | 12 Channel, 8-Bit TrimDACs with Power Shutdown |
| AD8804 | 12 Channel, 8-Bit TrimDACs with Power Shutdown(12通道,帶電源關(guān)斷8位D/A轉(zhuǎn)換器) |
| AD8842 | Precision, Quad, SPST Analog Switches |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD8802AN | 制造商:Analog Devices 功能描述:DAC 12-CH R-2R 8-bit 20-Pin PDIP N Tube 制造商:Analog Devices 功能描述:SEMICONDUCTORSLINEAR |
| AD8802ANZ | 功能描述:IC DAC 8BIT 12CH W/SD 20DIP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:TrimDAC® 標(biāo)準(zhǔn)包裝:2,400 系列:- 設(shè)置時間:- 位數(shù):18 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:3 電壓電源:模擬和數(shù)字 功率耗散（最大）:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:36-TFBGA 供應(yīng)商設(shè)備封裝:36-TFBGA 包裝:帶卷 (TR) 輸出數(shù)目和類型:* 采樣率（每秒）:* |
| AD8802AR | 功能描述:IC DAC 8BIT 12CH W/SD 20-SOIC RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:TrimDAC® 標(biāo)準(zhǔn)包裝:47 系列:- 設(shè)置時間:2µs 位數(shù):14 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:1 電壓電源:單電源 功率耗散（最大）:55µW 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:28-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:28-SSOP 包裝:管件 輸出數(shù)目和類型:1 電流，單極；1 電流，雙極 采樣率（每秒）:* |
| AD8802AR-REEL | 制造商:Analog Devices 功能描述:DAC 12-CH R-2R 8-bit 20-Pin SOIC W T/R |
| AD8802ARU | 功能描述:IC DAC 8BIT 12CH W/SD 20-TSSOP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:TrimDAC® 標(biāo)準(zhǔn)包裝:47 系列:- 設(shè)置時間:2µs 位數(shù):14 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:1 電壓電源:單電源 功率耗散（最大）:55µW 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:28-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:28-SSOP 包裝:管件 輸出數(shù)目和類型:1 電流，單極；1 電流，雙極 采樣率（每秒）:* |
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