AD5791-Linearity-Calibrator

NNNILabs·AD5791-Linearity-Calibrator·HW/AD5791 Linearity Calibrator.kicad_pcb

About the AD5791-Linearity-Calibrator PCB

AD5791-Linearity-Calibrator is an open source RP2040/RP2350 PCB design by NNNILabs, published on GitHub under the MIT license. It is a 4-layer board measuring 80 × 100 mm, with 53 components from 31 distinct parts.

Its main chip is the Pico, from the RP2040/RP2350 family. Other key parts include the L78L15, AD5791BRUZ, REFSCALE, REFBUF and OUTBUF. By type, the board carries 16 capacitors, 13 connectors, 10 ICs, 10 resistors, 2 jumpers and 1 switch.

From the project

Power is supplied through the 3.5mm terminal block with the labels 'IN+' and 'IN-'. +/-18V is an ideal nominal supply. The DAC board is connected to a computer through the Raspberry Pi Pico controller's micro USB port. Communicating with the DAC is possible through any serial terminal. The binary code representing the desired output voltage is typed in, and the enter key is pressed to update the DAC output. The buffered DAC output is available on the 3.5mm terminal block with the labels 'OUT+' and 'OUT-'. Raw DAC output is available on the 'DAC' test point.

Main components on the AD5791-Linearity-Calibrator

L78L15 AD5791BRUZ REFSCALE REFBUF Pico OUTBUF ADR1399 L79L15 7533 ADuM1400xRW

AD5791-Linearity-Calibrator bill of materials (BOM)

53 components, 31 distinct parts.

Qty	Part	Footprint	Refs
1	L78L15	SOT-89-3	U4
1	AD5791BRUZ	SOP65P640X120-20N	U5
1	REFSCALE	SOIC-8_3.9x4.9mm_P1.27mm	U6
1	REFBUF	SOIC-8_3.9x4.9mm_P1.27mm	U7
1	Pico	RPi_Pico_SMD_TH	U8
1	OUTBUF	SOIC-8_3.9x4.9mm_P1.27mm	U9
1	ADR1399	Analog_TO-46-4_ThermalShield	U10
1	L79L15	SOT-89-3	U11
1	7533	SOT-89-3	U12
1	ADuM1400xRW	SOIC-16W_7.5x10.3mm_P1.27mm	U13
2	~	CTB93HD3	J1, J4
2	VREFP	PinHeader_1x02_P1.27mm_Vertical	J2, J5
1	VREFN	PinHeader_1x02_P1.27mm_Vertical	J3
1	SIG	PinHeader_1x04_P1.27mm_Vertical	J6
1	PWR	PinHeader_1x04_P2.54mm_Vertical	J7
1	REFCAP	PinHeader_1x02_P1.27mm_Vertical	J8
5	PWR	PinHeader_1x02_P2.54mm_Vertical	J9, J10, J11, J12, J13
1	DACOUT	PinHeader_1x02_P1.27mm_Vertical	JP1
1	GND	PinHeader_1x02_P1.27mm_Vertical	JP2
1	RST	SW_SPST_B3U-1000P	SW1

Show 11 more

Qty	Part	Footprint	Refs
1	5819	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	D3
3	100uF	CP_Elec_6.3x5.4	C1, C2, C3
2	1uF	C_0603_1608Metric	C4, C8
3	10uF	C_0603_1608Metric	C5, C6, C7
6	100nF	C_0603_1608Metric	C9, C10, C11, C12, C13, C14
2	10uF	R_0603_1608Metric	C15, C16
1	100K	R_0603_1608Metric	R1
6	10R	R_0603_1608Metric	R2, R3, R4, R5, R6, R7
1	1K	R_0603_1608Metric	R8
1	5R1	R_0603_1608Metric	R9
1	10K	SOIC-16_3.9x9.9mm_P1.27mm	RN1

AD5791-Linearity-Calibrator design files

The KiCad project lives in the NNNILabs/AD5791-Linearity-Calibrator repository on GitHub; these links point at the commit this page was built from.

LayoutHW/AD5791 Linearity Calibrator.kicad_pcb
SchematicHW/AD5791 Linearity Calibrator.kicad_sch

AD5791-Linearity-Calibrator: common questions

What microcontroller does the AD5791-Linearity-Calibrator use?

The AD5791-Linearity-Calibrator is built around the Pico, from the RP2040/RP2350 family.

How big is the AD5791-Linearity-Calibrator PCB?

The AD5791-Linearity-Calibrator measures 80 × 100 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the AD5791-Linearity-Calibrator?

53 components, from 31 distinct parts. The full bill of materials is listed on this page.

Where can I download the AD5791-Linearity-Calibrator design files?

From the NNNILabs/AD5791-Linearity-Calibrator repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the AD5791-Linearity-Calibrator design in my own project?

Yes, under the terms of its MIT license, which NNNILabs chose for the repository.

Can I test firmware for the AD5791-Linearity-Calibrator without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.