EVAL-AD1928EB AD [Analog Devices], EVAL-AD1928EB Datasheet - Page 30

• Manufacturer Part Number: EVAL-AD1928EB
• Description: 2 ADC/8 DAC with PLL, 192 kHz, 24-Bit Codec
• Manufacturer: AD [Analog Devices]

AD1928
APPLICATION CIRCUITS
Typical applications circuits are shown in Figure 29 through
Figure 32. Figure 29 shows a typical ADC input filter circuit.
Recommended loop filters for LR clock and master clock as the
AUDIO
INPUT
Figure 30. Recommended Loop Filters for LRCLK and MCLK PLL Reference
AVDD2
600Z
100pF
LF
Figure 29. Typical ADC Input Filter Circuit
+
5.76kΩ
LRCLK
3.32kΩ
39nF
2
3
6
5
–
OP275
+
–
OP275
+
2.2nF
5.76kΩ
5.76kΩ
5.76kΩ
120pF
120pF
AVDD2
1
7
LF
4.7µF
4.7µF
+
+
MCLK
562Ω
5.6nF
237Ω
237Ω
NPO
NPO
1nF
1nF
390pF
100pF
ADCxN
ADCxP
Rev. 0 | Page 30 of 32
PLL reference are shown in Figure 30. Output filters for the
DAC outputs are shown in Figure 31 and Figure 32 for the
noninverting and inverting cases.
DAC OUT
DAC
OUT
Figure 31. Typical DAC Output Filter Circuit (Single-Ended, Noninverting)
Figure 32. Typical DAC Output Filter Circuit (Single-Ended, Inverting)
270pF
NPO
11kΩ
11kΩ
4.75kΩ
3.01kΩ
270pF
4.75kΩ
CM
NPO
0.1µF
68pF
NPO
2
3
3
2
4.99kΩ
–
OP275
+
+
OP275
–
240pF
NPO
4.99kΩ
1
1
604Ω
604Ω
2.2nF
4.7µF
+
NPO
3.3nF
4.7µF
NPO
+
49.9kΩ
49.9kΩ
AUDIO
OUTPUT
AUDIO
OUTPUT