AMC7834 Datasheet, PDF (26/93 Pages) Texas Instruments – AMC7834 12-Bit Integrated Power-Amplifier Monitor and Control System with Temperature, Current and Voltage Supervision Capabilities

AMC7834
SLAS972B – NOVEMBER 2014 – REVISED MARCH 2016
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7.3 Feature Description
7.3.1 Digital-to-Analog Converters (DACs)
The AMC7834 device features an analog-control system centered on eight, 12-bit DACs that can operate from
an external reference or the device internal reference. Each DAC core consists of a string DAC and an output-
voltage buffer.
The resistor-string structure consists of a series of resistors, each with a value of R. The code loaded to the DAC
determines at which node on the string the voltage is tapped off to be fed into the output amplifier. The voltage is
tapped off by closing one of the switches connecting the string to the amplifier (see Figure 44). The resistor string
architecture has inherent monotonicity, voltage output, and low glitch. The resistor string architecture is also
linear because all the resistors are of equal value.
R
R
R
To Output
Amplifier
R
R
Figure 44. DAC Resistor String
26
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