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參數(shù)資料
| 型號(hào)： | AD7521LN |
| 廠商： | Intersil |
| 文件頁數(shù)： | 4/10頁 |
| 文件大小： | 0K |
| 描述： | CONV D/A 12BIT 1MHZ 2LSB 18-DIP |
| 標(biāo)準(zhǔn)包裝： | 20 |
| 位數(shù)： | 12 |
| 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）： | 20mW |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 通孔 |
| 封裝/外殼： | 18-DIP（0.300"，7.62mm） |
| 供應(yīng)商設(shè)備封裝： | 18-PDIP |
| 包裝： | 管件 |
| 輸出數(shù)目和類型： | 2 電流，單極；2 電流，雙極 |
| 采樣率（每秒）： | 1M |
3
Functional Diagram
POWER SUPPLY CHARACTERISTICS
Power Supply Rejection
V+ = 14.5V to 15.5V
-
±0.005
-
±0.005
-
%
FSR/%
V+
Power Supply Voltage Range
+5 to +15
V
I+
All Digital Inputs at 0V or V+
Excluding Ladder Network
-
±1-
-
±1-
A
All Digital Inputs High or Low
Excluding Ladder Network
--
2
-
2
mA
Total Power Dissipation
Including the Ladder Network
-
20
-
20
-
mW
NOTES:
2. Full Scale Range (FSR) is 10V for Unipolar and
±10V for Bipolar modes.
3. Using internal feedback resistor RFEEDBACK.
4. Guaranteed by design, or characterization and not production tested.
5. Accuracy not guaranteed unless outputs at GND potential.
6. Accuracy is tested and guaranteed at V+ = 15V only.
Electrical Specifications
V+ = +15V, VREF = +10V, TA = 25oC Unless Otherwise Specified (Continued)
PARAMETER
TEST CONDITIONS
AD7520
AD7521
UNITS
MIN
TYP
MAX
MIN
TYP
MAX
Pin Descriptions
AD7520
AD7521
PIN NAME
DESCRIPTION
11
IOUT1
Current Out summing junction of the R2R ladder network.
22
IOUT2
Current Out virtual ground, return path for the R2R ladder network.
3
GND
Digital Ground. Ground potential for digital side of D/A.
4
Bits 1(MSB)
Most Significant Digital Data Bit.
5
Bit 2
Digital Bit 2.
6
Bit 3
Digital Bit 3.
7
Bit 4
Digital Bit 4.
8
Bit 5
Digital Bit 5.
9
Bit 6
Digital Bit 6.
10
Bit 7
Digital Bit 7.
11
Bit 8
Digital Bit 8.
12
Bit 9
Digital Bit 9.
13
Bit 10
Digital Bit 10 (AD7521). Least Significant Digital Data Bit (AD7520).
-
14
Bit 11
Digital Bit 11 (AD7521).
-
15
Bit 12
Least Significant Digital Data Bit (AD7521).
14
16
V+
Power Supply +5V to +15V.
15
17
VREF
Voltage Reference Input to set the output range. Supplies the R2R resistor ladder.
16
18
RFEEDBACK Feedback resistor used for the current to voltage conversion when using an external Op Amp.
20k
GND
IOUT2
IOUT1
RFEEDBACK
BIT 3
BIT 2
MSB
VREF
20k
20k
20k
20k
20k
10k
10k
10k
10k
SPDT NMOS
SWITCHES
10k
NOTES:
Switches shown for Digital Inputs “High”.
Resistor values are typical.
AD7520, AD7521
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