DDS 25MHz GENERATOR MODULE FCALLBOX

Description

This small module is a Function Generator DDS based on a AD5932 with the features following :

- Sine and Triangle output up to 25MHz, triangle, amplitude 20Vpkpk, DC offset -10V to +10V on HE10 connector 2 points.

- Square output 0-5V on HE10 connector 2 points.

- Sync output 0-5V on HE10 connector 2 points.

- Connection with the host by connector right angle HE10 2x19 compatible with FCALLBOX backplane

- Programmation by SPI for the AD5392 and by I2Cfor the DAC which set the DC offset of the output Sinus/Triangle.

- Power supply 5V only (+12V, -12V, -5V generated on board).

Summary

• Block diagram

• Schematic

• BOM

• PCB

• Assembly

BLOCK DIAGRAM

Schematic

Le schéma de la carte :

Download here the schematic

BOM

Vue de dessus Ref Description Manufacturer / Reference R7 Resistor 0R 5% 0603 All brands R1,R2,R3,R14,R18,R19,R29,R30,R31 .. R36 Resistor 1KR 5% 0603 All brands R4 Resistor 10KR 5% 0603 All brands R6,R16,R17 Resistor 100KR 5% 0603 All brands R13 Resistor 24R 5% 0603 All brands R15 Resistor 120K 1% 0603 All brands R22 Resistor 24.6K 1% 0603 All brands R21 Resistor 59K 1% 0603 All brands R20 Resistor 510K 1 0603 All brands R26,R27 Resistor 1K2 1% 0603 All brands R25,R28 Resistor 390R 1% 0603 All brands R27 Resistor 24R 5% 0603 All brands R23,R24 Resistor 30KR 5% 0603 All brands R23,R24 Resistor 30KR 5% 0603 All brands R37,R47 Resistor 0R 5% 0603 All brands C1,C2,C3,C4,C5,C6,C7,C8,C10,C17,C20,C21,C22,C31,C32,C33,C34,C35,C36,C37 Capacitor 100nF 50V X7R 0603 All brands C13,C14,C15,C16,C18,C19,C30,C38,C40 Capacitor 10uF 16V X7R 0603 All brands C9,C11 Capacitor 10nF 50V X7R 0603 All brands C45,C46 Capacitor 1uF 16V X7R 0603 All brands C12 Capacitor 22pF 0603 All brands C32 Capacitor 100pF 0603 All brands C43,C44 Capacitor 2.2uF 16V X7R 0603 All brands C41,C42 Capacitor 220uF 25V radial Panasonic EEUFM1E221 or equivalent L1,L4,L5,L6 inductance 22uH 140mA 1210 EPCOS B82422A1223K10 or équivalent L3 inductance 47uH 0.8A 7x7 SUMIDA CDRH6D28NP-220NC ou equivalent L2 inductance 22uH 1.2 7x7 SUMIDA CDRH6D28NP-470NC or equivalent D1 Diode Schottky 1A 20V SOD323 or SOD123 All brands, eg 1N5819HW D2 Diode Schottky 1A 20V SOD123 All brands, eg 1N5819HW U14 74F04 SO14 All brands U13 IC LM2776 SOT23-6 Texas Instruments /LM2776 U5 IC LDO 3.3V 500mA SOT23-5 SPX3819M5-L-3-3 or MIC5504-3.3YM5-TR U1 DDS generator AD5932s Analog Device AD5932YRUZ U4 CNA AD5627 12 bits Analog Device AD5627RBRMZ-1 U3 PGA VCA810 VCA810ID / Texas Instruments U8,U12 AOP TL072 TL072 All brands U3 PGA VCA810 VCA810ID / Texas Instruments U11 MP3209 boost converter SOT23-5 MPS MP3209DJ U6 AOP 60MHz 250mA LT1206 Linear technology LT1206CN8#PBF U7 DC/DC inverter MAX765 SO8 MAX764CSA Maxim Integrated U2 Oscillator 50MHz 3.3V ACHL-50.000MHZ-EK ABRACON or equivalent J2 Connector male right angle 2x19 pitch 2.54mm All brands

PCB

The board is 50x100mm and is a part of the PCB F00111 which contents one board (on bot of the picture).

So you have to cut the PCB on the red line.

Download here the manufacturing files

Assembly

Do not populate R8 (in pink color on the picture).

Top view

Download here the top view in PDF format     

Picture

Modif 2 detail

Modif 2 picture