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參數(shù)資料
| 型號(hào)： | DAC80Z-CBI-V |
| 英文描述： | Monolithic 12-Bit DIGITAL-TO-ANALOG CONVERTERS |
| 中文描述： | 單片12位數(shù)字到模擬轉(zhuǎn)換器 |
| 文件頁數(shù)： | 7/9頁 |
| 文件大?。?/td> | 211K |
| 代理商： | DAC80Z-CBI-V |
7
DAC80/80P
Existing applications that are converting to the monolithic
DAC80 must change the gain trim resistor on pin 23 from
33M
to 10M
to insure sufficient adjustment range. Pin
23 is a high impedance point and a 0.001
μ
1F to 0.01
μ
F
ceramic capacitor should be connected from this pin to
Common (pin 21) to prevent noise pickup. Refer to Figure
5 for relationship of Offset and Gain adjustments to unipolar
and bipolar D/A operation.
Unipolar
Offset Adjustment
For unipolar (CSB) configurations, apply the digital input
code that should produce zero potential output and adjust the
Offset potentiometer for zero output.
For bipolar (COB, CTC) configurations, apply the digital
input code that should produce the maximum negative
output. Example: If the Full Scale Range is connected for
20V, the maximum negative output voltage is –10V. See
Table II for corresponding codes.
Gain Adjustment
For either unipolar or bipolar configurations, apply the
digital input that should give the maximum positive output.
Adjust the Gain potentiometer for this positive full scale
output. See Table II for positive full scale voltages and
currents.
Bipolar
+ Full Scale
All Bits
Logic 1
1LSB
Range
of Offset
Adjust
Offset Adjust Translates the Line
Digital Input
All Bits
Logic 0
Range of
Gain Adjust
A
Gain Adjust
Rotates the Line
F
+ Full Scale
All Bits
Logic 1
1LSB
Range of
Offset Adjust
Offset Adjust Translates the Line
Digital Input
–Full Scale
Range of
Gain Adjust
A
Gain Adjust
Rotates the Line
Full Scale
Range
Bipolar
Offset
MSB On,
All Others
Off
All Bits
Logic 0
FIGURE 5. Relationship of Offset and Gain Adjustments for
a Unipolar and Bipolar D/A Converter.
ANALOG OUTPUT
DIGITAL INPUT
VOLTAGE
(1)
CURRENT
MSB
↓
000000000000
011111111111
100000000000
111111111111
One LSB
LSB
0 to +10V
±
10V
0 to –2mA
±
1mA
↓
+9.9976V
+5.0000V
+4.9976V
0.0000V
2.44mV
+9.9951V
0.0000V
–0.0049V
–10.0000V
4.88mV
–1.9995mA
–1.0000mA
–0.9995mA
0.0000mA
0.488
μ
A
–0.9995mA
0.0000mA
+0.0005mA
+1.000mA
0.488
μ
A
NOTE: (1) To obtain values for other binary ranges:
0 to +5V range divide 0 to +10V range values by 2.
±
5V range: divide
±
10V range values by 2.
±
2.5V range: divide
±
10V range values by 4.
TABLE II. Digital Input/Analog Output.
VOLTAGE OUTPUT MODELS
Output Range Connections
Internal scaling resistors provided in the DAC80 may be
connected to produce bipolar output voltage ranges of
±
10V,
±
5V, or
±
2.5V; or unipolar output voltage ranges of 0 to
+5V or 0 to +10V. See Figure 6.
Gain and offset drift are minimized because of the thermal
tracking of the scaling resistors with other internal device
components. Connections for various output voltage ranges
are shown in Table III. Settling time for a full-scale range
change is specified as 4
μ
s for the 20V range and 3
μ
s for the
10V range.
FIGURE 6. Output Amplifier Voltage Range Scaling Circuit.
6.3k
(1)
5k
(1)
5k
(1)
18
Summing
Junction
20
Reference Input
To Reference Control Circuit
NOTE: (1) Resistor Tolerances: ±2% max.
Common
19
15
21
17
Bipolar
Offset
Output
From Weighted
Resistor
Network
16
10M
270k
270k
7.8k
to 10k
3.9M
180k
180k
10k
FIGURE 4. Equivalent Resistances.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DAC80ZCBI-V | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| DAC811 | 制造商:BB 制造商全稱:BB 功能描述:Microprocessor-Compatible 12-BIT DIGITAL-TO-ANALOG CONVERTER |
| DAC811AH | 功能描述:數(shù)模轉(zhuǎn)換器- DAC Mcrprcsr-Compatible 12-Bit RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| DAC811AH | 制造商:Texas Instruments 功能描述:D/A Converter (D-A) IC |
| DAC811BH | 功能描述:數(shù)模轉(zhuǎn)換器- DAC Mcrprcsr-Compatible 12-Bit RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
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