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參數資料
| 型號： | AD7846 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | LC2MOS 16-Bit Voltage Output DAC |
| 中文描述： | LC2MOS 16位電壓輸出DAC |
| 文件頁數： | 10/16頁 |
| 文件大小： | 615K |
| 代理商： | AD7846 |
REV. E
–10–
AD7846
AD7846
DAC1
R
IN
V
OUT
DGND
DB0
V
REF+
V
REF
–
DB15
–
15V
AD588
V
H
D
D
INH
INH
V
L
AD7846
DAC2
R
IN
V
OUT
DGND
DB0
V
REF+
V
REF
–
DB15
AD7846
DAC3
R
IN
V
OUT
DGND
DB0
V
REF+
V
REF
–
DB15
AD7846
DAC4
R
IN
V
OUT
DGND
DB0
V
REF+
V
REF
–
DB15
COMPARE DATA
AND DON'T
CARE DATA
PERIOD
GENERATION
AND DELAY
DUT
FORMATTER
AD345
COMPARE
REGISTER
AD9687
DC PARAMETRICS
+15V
R1
STORED DATA
AND INHIBIT
PATTERN
Figure 21. Digital Test System with 16-Bit Performance
TEST APPLICATION
Figure 21 shows the AD7846 in an Automatic Test Equipment
application. The readback feature of the AD7846 is very useful
in these systems. It allows the designer to eliminate phantom
memory used for storing DAC contents and increases system
reliability since the phantom memory is now effectively on chip
with the DAC. The readback feature is used in the following
manner to control a data transfer. First, write the desired 16-bit
word to the DAC input latch using the
CS
and R/
W
inputs.
Verify that correct data has been received by reading back the
latch contents. Now, the data transfer can be completed by
bringing the asynchronous
LDAC
control line low. The analog
equivalent of the digital word now appears at the DAC output.
In Figure 21, each pin on the Device Under Test can be an
input or output. The AD345 is the pin driver for the digital
inputs, and the AD9687 is the receiver for the digital outputs.
The digital control circuitry determines the signal timing and
format.
DACs 1 and 2 set the pin driver voltage levels (V
H
and V
L
), and
DACs 3 and 4 set the receiver voltage levels. The pin drivers
used in ATE systems normally have a nonlinearity between
input and output. The 16-bit resolution of the AD7846 allows
compensation for these input/output nonlinearities. The dc
parametrics shown in Figure 21 measure the voltage at the
device pin and feed this back to the system processor. The pin
voltage can thus be fine-tuned by incrementing or decrementing
DACs 1 and 2 under system processor control.
相關PDF資料 |
PDF描述 |
|---|---|
| AD7846AP | LC2MOS 16-Bit Voltage Output DAC |
| AD7846AQ | LC2MOS 16-Bit Voltage Output DAC |
| AD7846BP | LC2MOS 16-Bit Voltage Output DAC |
| AD7846JN | LC2MOS 16-Bit Voltage Output DAC |
| AD7846JP | LC2MOS 16-Bit Voltage Output DAC |
相關代理商/技術參數 |
參數描述 |
|---|---|
| AD7846_10 | 制造商:AD 制造商全稱:Analog Devices 功能描述:LC2MOS 16-Bit Voltage Output DAC |
| AD7846ACHIPS | 制造商:AD 制造商全稱:Analog Devices 功能描述:LC2MOS 16-Bit Voltage Output DAC |
| AD7846AP | 功能描述:IC DAC 16BIT LC2MOS VOUT 28PLCC RoHS:否 類別:集成電路 (IC) >> 數據采集 - 數模轉換器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1,000 系列:- 設置時間:1µs 位數:8 數據接口:串行 轉換器數目:8 電壓電源:雙 ± 功率耗散（最大）:941mW 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:24-SOIC W 包裝:帶卷 (TR) 輸出數目和類型:8 電壓，單極 采樣率（每秒）:* |
| AD7846APZ | 功能描述:IC DAC 16BIT LC2MOS VOUT 28-PLCC RoHS:是 類別:集成電路 (IC) >> 數據采集 - 數模轉換器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1,000 系列:- 設置時間:1µs 位數:8 數據接口:串行 轉換器數目:8 電壓電源:雙 ± 功率耗散（最大）:941mW 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:24-SOIC W 包裝:帶卷 (TR) 輸出數目和類型:8 電壓，單極 采樣率（每秒）:* |
| AD7846AQ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述:IC,D/A CONVERTER,SINGLE,16-BIT,BICMOS,DIP,28PIN |
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