Texas Instruments SLAU081 manual 2.2.3Channel 0 Analog Output, 2.2.4Signal Generator

Jumpers

2.2.3Channel 0 Analog Output

With a one-channel DAC installed, this signal is the primary analog output (output A).

With a two-channel DAC installed, the pinout of these devices effectively resolves this channel to be the secondary analog output (output B).

	Analog Input Configuration Channel 0
Reference	Functional Description
Designator
W19	This jumper selects the source for the analog output on channel 0.
	When a jumper is installed between pins 1 and 2, the output from the expansion connector’s
	B-channel is routed out.
	When the jumper is installed between pins 2 and 3, the output from the onboard signal
	conditioning is directed through channel 0.

2.2.4Signal Generator

	Signal Generator
Reference	Functional Description
Designator
W9	W9 controls the generation of both onboard test signals. A jumper installed between pins 1 and 2
	disables the waveform generator.

2.2.5Voltage Reference

	Voltage Reference
Reference	Functional Description
Designator
W16	W16 selects either the onboard reference or an external reference supplied by the user.
W17	W17 allows the user to vary the reference voltage.
W14	There are a number of possible DACs that a user can install on this EVM. Some have an internal
	reference that the user can select via software, and some do not have an internal reference. For
	the DACs that support an internal reference, it is important to have the facility to remove the
	external reference supplied by the EVM (or user) to avoid conflicts between the DAC’s internal
	reference and the external reference.

2.2.6ADC Supply Voltage

	ADC Supply Voltage
Reference	Functional Description
Designator
W13	This jumper controls the analog supply voltage.
	When the jumper is installed, the supply voltage to the ADC is 3.3 V.
	When the jumper is not installed, the supply voltage to the ADC is 5 V.

Getting Started 2-5