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STD AD4000sch

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Update time: 2022-03-06 01:31:50
Creation time: 2021-12-04 16:47:02
Description

This actually uses the AD7276. It was originally designed for the AD4000, and I suggest you use that ADC if you are able to solder a 0.5 mm pin pitch IC. There are two analog input signal paths, one for a microphone from adafruit and another designed for a generic wideband signal. The low pass filter on the microphone is a 4th order Butterworth filter with a -0.1 dB corner at 30 kHz. The wideband filter is a 2nd order Butterworth filter with a -0.1 dB corner at 1 MHz. The attached filter wizard files can be loaded at https://tools.analog.com/en/filterwizard/ . The software to run this project is located at https://github.com/tulanthoar/workspace_1.8.0 (although it is not ready yet at this time). Note that you will need to connect the analog and digital grounds at TP10 by manually adding a trace between the two sides. It is recommended that you add ground pours of the digital and analog grounds on their respective sides.

Design Drawing
schematic diagram
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PCB
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ID Name Designator Footprint Quantity
1 Adafruit FT232H Breakout B1 ADAFRUIT_FT232H_BREAKOUT 1
2 10uF C1,C2,C3,C11,C13,C14,C15,C18,C20,C21,C23,C30,C31,C32,C33,C36,C38,C39,C40 C1206 19
3 100nF C4,C5,C16,C17,C19,C22,C24,C25,C26,C27,C28,C29,C35,C37,C41 C1206 15
4 680pF C6 C0603 1
5 68pF C7 C0603 1
6 120pF C8 C0805 1
7 1.2nF C9 C0805 1
8 82pF C10 C0603 1
9 20pF C12 C0603 1
10 XH-2A CN1 CONN-TH_XH-2A 1
11 SS34_C408258 D2 SMA_L4.4-W2.6-LS5.0-RD 1
12 0466002.NRHF F1,F2 F1206 2
13 19-213/Y2C-CQ2R2L/3T(CY) LED4,LED5,LED6 LED0603-R-RD 3
14 0805G (Green) LED7,LED8,LED9 LED0805-RD_GREEN 3
15 FC-2012HRK-620D LED10,LED11,LED12 LED0805-RD_RED 3
16 19-217/BHC-ZL1M2RY/3T LED13,LED14,LED15,LED20 LED0603-R-RD_BLUE 4
17 NUCLEO-H743ZI2 NUC-H1 NUCLEO-H7 1
18 SI2301CDS-T1-GE3 Q4,Q5,Q6,Q7,Q8,Q9,Q10,Q11,Q12,Q13,Q14,Q15 SOT-23-3_L3.0-W1.7-P0.95-LS2.9-BR 12
19 100 R1,R3 R0805 2
20 1K R2,R7,R22,R23,R36 R0603 5
21 499 R4 R0603 1
22 825 R5 R1206 1
23 59K R6,R19,R37 R0603 3
24 1.05k R8 R0402 1
25 2.1K R9,R10 R0603 2
26 2.21K R11 R0805 1
27 1.02K R12 R0603 1
28 4.42K R13,R14 R0805 2
29 33.2K R15,R16,R17,R18 R0603 4
30 10K R20 R0805 1
31 330 R24,R25,R26,R27,R28,R29,R30,R31,R32,R33,R34,R35 R0603 12
32 testp TP2,TP3,TP4,TP5,TP6,TP7,TP20,TP21,TP22,TP23,TP24,TP25,TP26,TP30,TP31,TP32,TP33,TP34,TP40 TESTP 19
33 gnd_connect TP10 GNDCONNECT 1
34 ADA4897-1ARZ U1 SOIC-8_L5.0-W4.0-P1.27-LS6.0-TL 1
35 AD8031BRZ-REEL7 U2,U4 SOIC-8_L4.9-W3.9-P1.27-LS6.0-BL 2
36 jumper U3,U5,U6,U14 JUMPER 4
37 ADA4807-1ARJZ-R2 U7,U8,U9 SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BL 3
38 3 pin selection U10 3 PIN SELECTION 1
39 ADR4533BRZ U12 SOIC-8_L4.9-W3.9-P1.27-LS6.0-BL 1
40 MIC29302WU U13 TO-263-5_L10.2-W9.9-P1.70-LS14.4-TL 1
41 AMS1117-3.3 U15,U18 SOT-223-3_L6.5-W3.4-P2.30-LS7.0-BR 2
42 MAX446AMP U16 MAX4466AMP 1
43 AD7276AUJZ-500RL7 U19 TSOT-23-6_L2.9-W1.6-P0.95-LS2.8-TL 1

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Project Attachments
Order File name Download times
1

AD4000FilterAudio.json

0
2

AD4000FilterWideBand.json

0
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