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Texas Instruments DAC7741EVM Factory Default Setting, 1. Factory Default Jumper Setting, Function

Models: DAC7741EVM

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Factory Default Setting

3.1 Factory Default Setting

The EVM board is set to its default configuration from factory as described on the table below to operate in bipolar ±10V mode of operation using the internal reference.

Table 3-1. Factory Default Jumper Setting

Reference	Jumper		Function
Reference	Position		Function

W1	OPEN		VREF output pin is floated and not used for offset adjustment.
W2	2-3				pin is tied to AGND to enable 10 V internal reference.
W2	2-3		REFEN		pin is tied to AGND to enable 10 V internal reference.
W3	1-2		REFOUT pin is strapped to REFIN to provide 10 V internal voltage reference.
W4	OPEN		Onboard external reference through U3 is disconnected.

W5	1-2		Negative supply rail of U2 op-amp is supplied with -15 V.

W6	OPEN		REFADJ pin is floated.

W7	CLOSE		RFB2 pin is strapped to VOUT pin for DAC output feedback.
W8	CLOSE		TEST pin is tied to DGND.

W9	OPEN		SJ pin is floated.

W10	OPEN		RFB1 is floated.

W11	CLOSE		AGND and DGND are tied together to a common point.

W12	1-2		Positive supply rail of U2 op-amp is supplied with 15 V.

W13	3-4		Buffered output of DAC is channeled through to J5 and J4-2.

W14	OPEN		External reference is disconnected from the negative input of U2 to configure U2 for
			unity gain.
W15	OPEN		Configure U2 op-amp for unity gain.

W16	OPEN		RSTSEL pin is tied high to set DAC reset value to midscale.

W17	OPEN			pin is tied high by default.
W17	OPEN		RST	pin is tied high by default.

3-2

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Texas Instruments DAC7741EVM Factory Default Setting, 1. Factory Default Jumper Setting, Reference, Function, Position

Contents

October User’s GuideDAC7741EVM DAP EVMsIMPORTANT NOTICE EVM IMPORTANT NOTICE EVM WARNINGS AND RESTRICTIONS About This Manual How to Use This ManualRead This First Information About Cautions and WarningsFCC Warning Related Documentation From Texas InstrumentsQuestions about this or other Data Converter EVM’s? Trademarks1 EVM Overview ContentsFigures 2 Physical Description3-2 Unity Gain Output Jumper Settings Tables2-1 Parts List 3-1 Factory Default Jumper Setting 3-3 Gain of Two Output Jumper SettingsPage EVM OverviewChapter Topic1.2.1 Supply Voltage 1.1 Features1.2 Power Requirements 1.2.2 Reference VoltageEVM Basic Functions 1.3 EVM Basic FunctionsEVM Overview A block diagram of the EVM is shown below in the Figure Figure 1-1. EVM Block DiagramEVM Basic Functions Page Physical DescriptionChapter TopicFigure 2-1. Layer One Top Silkscreen 2.1 PCB LayoutPCB Layout PCB Layout Figure 2-2. Layer Two Ground PlanePhysical Description Figure 2-3. Layer 3 Power Plane PCB LayoutPCB Layout Figure 2-4. Layer 4 Bottom PlanePhysical Description Figure 2-5. Drill Drawing PCB LayoutBill of Materials 2-1. Parts List2.2 Bill of Materials Physical DescriptionThis page has been left blank intentionally Bill of MaterialsPage EVM OperationChapter TopicFactory Default Setting 3.1 Factory Default SettingTable 3-1. Factory Default Jumper Setting Reference3.2 Host Processor Operation Table 3-2. Unity Gain Output Jumper Settings3.2.1 Unity Gain Output 3.2.2 Output Gain of Two Table 3-3. Gain of Two Output Jumper SettingsTable 3-4. Capacitive Load Drive Output Jumper Settings 3.2.3 Capacitive Load DriveJumper Setting 3.3 Jumper SettingTable 3-5. Jumper Setting Function ReferenceSetting Table 3-5. Jumper Setting Function ContinuedJumper Setting JumperSchematic 3.4 SchematicA schematic of the DAC7741 is found on the following page EVM OperationDAC7741 6443168