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DAC11001A Datasheet(PDF) 26 Page - Texas Instruments

No. de Pieza. DAC11001A
Descripción  DACx1001 20-Bit, 18-Bit, and 16-Bit, Low-Noise, Ultra-Low Harmonic Distortion, Fast-Settling, High-Voltage Output, Digital-to-Analog Converters (DACs)
Descarga  42 Pages
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Fabricante  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
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DAC11001A Datasheet(HTML) 26 Page - Texas Instruments

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DAC110 01
DUT
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OPA828
INA188
INA188
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DAC11001A, DAC91001, DAC81001
SLASEL0 – OCTOBER 2019
www.ti.com
Product Folder Links: DAC11001A DAC91001 DAC81001
Submit Documentation Feedback
Copyright © 2019, Texas Instruments Incorporated
9 Application and Implementation
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
9.1 Application Information
The DACx1001 family of DACs are targeted for high-precision applications where ultra-high dc accuracy, ultra-
low noise, fast settling, or high total harmonic distortion (THD) is required. The DACx1001 provides 20-bit
monotonic resolution. This device finds application in high-performance source measure unit (SMU), battery test
equipment (BTE), arbitrary waveform generation (AWG), and closed-loop control applications such as
microelectromechanical system (MEMS) actuators, linear actuators, precision motor control, lens autofocus
control in precision microscopy, lens control in mass spectrometer, beam control in electron beam lithography,
and so on.
9.2 Typical Application
9.2.1 Source Measure Unit (SMU)
A source measure unit (SMU) is a common building block in memory and semiconductor test equipment and
bench-top source measure units. A DAC is used in an SMU to force a desired voltage or a current to a device-
under-test (DUT). Figure 15 provides a simplified circuit diagram of the force-DAC in an SMU.
Figure 15. Source Measure Unit
9.2.1.1 Design Requirements
Force voltage range: ±10 V
Force current range: ±20 mA
9.2.1.2 Detailed Design Procedure
The DAC11001A is an excellent choice for this application to meet the 20-bit resolution requirement. Switch SW
is used to toggle between force-voltage and force-current modes, as shown in Figure 15. The OPA828 is a high-
precision amplifier that provides a good balance between dc and ac performance, and can supply ±30-mA output
current. The INA188 is a zero-drift instrumentation amplifier with gain selected with an external resistor. The
external resistor is not shown in the drawing for simplicity. The gain resistor is not required for a gain of 1.
Equation 2 shows the calculation of the voltage gain when switch SW is in position 1.
(2)


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