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参数资料
| 型号： | DAC702LH |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | DAC |
| 英文描述： | PARALLEL, WORD INPUT LOADING, 4 us SETTLING TIME, 16-BIT DAC, CDIP24 |
| 封装： | HERMETIC SEALED, CERAMIC, DIP-24 |
| 文件页数： | 2/12页 |
| 文件大小： | 302K |
| 代理商： | DAC702LH |
10
DAC701, 702, 703
APPLICATIONS
DRIVING AN EXTERNAL OP AMP
WITH CURRENT OUTPUT D/AS
DAC702 is current output devices and will drive the sum-
ming junction of an op amp to produce an output voltage as
shown in Figure 9. Use of the internal feedback resistor is
required to obtain specified gain accuracy and low gain drift.
DAC702 can be scaled for any desired voltage range with an
external feedback resistor, but at the expense of increased
drifts of up to
±50ppm/°C. The resistors in the DAC702 ratio
track to
±1ppm/°C but their absolute TCR may be as high as
±50ppm/°C.
An alternative method of scaling the output voltage of the
D/A converter and preserving the low gain drift is shown in
Figure 10.
OUTPUTS LARGER THAN 20V RANGE
For output voltage ranges larger than
±10V, a high voltage
op amp may be employed with an external feedback resistor.
Use I
OUT values of ±1mA for bipolar voltage ranges and
–2mA for unipolar voltage ranges (see Figure 11). Use
protection diodes as shown when a high voltage op amp is
used.
Common
I
OUT
V
OUT
R
F
5k
4k
0 to
2mA
FIGURE 9. External Op Amp Using Internal Feedback
Resistors.
I
OUT
V
OUT
R
F
5k
4k
0 to
2mA
R
1
I
*
R
2 *
Common
R
1
*, R
2 TCR < ±10ppm/°C
FIGURE 10. External Op Amp Using Internal and External
Feedback Resistors to Maintain Low Gain Drift.
FIGURE 11. External Op Amp Using External Feedback
Resistors.
V
OUT
R
F
4k
0 to
2mA
BB3584
R
F
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相关代理商/技术参数 |
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|---|---|
| DAC702SH | 制造商:BB 制造商全称:BB 功能描述:Monolithic 16-Bit DIGITAL-TO-ANALOG CONVERTERS |
| DAC703 | 制造商:BB 制造商全称:BB 功能描述:Monolithic 16-Bit DIGITAL-TO-ANALOG CONVERTERS |
| DAC703B | 制造商:BB 制造商全称:BB 功能描述:Monolithic 16-Bit DIGITAL-TO-ANALOG CONVERTERS |
| DAC703BH | 制造商:BB 制造商全称:BB 功能描述:Monolithic 16-Bit DIGITAL-TO-ANALOG CONVERTERS |
| DAC703BH-BI | 制造商:BB 制造商全称:BB 功能描述:Monolithic 16-Bit DIGITAL-TO-ANALOG CONVERTERS |
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