AD1939WBSTZ Analog Devices Inc, AD1939WBSTZ Datasheet - Page 30

• Manufacturer Part Number: AD1939WBSTZ
• Description: 4-ADC 8-DAC Audio Codec W/on Chip PLL
• Manufacturer: Analog Devices Inc
• Type: General Purposer

Specifications of AD1939WBSTZ

• Data Interface: Serial
• Resolution (bits): 24 b
• Number Of Adcs / Dacs: 4 / 8
• Sigma Delta: Yes
• S/n Ratio, Adcs / Dacs (db) Typ: 94 / 94
• Dynamic Range, Adcs / Dacs (db) Typ: 105 / 110
• Voltage - Supply, Analog: 3 V ~ 3.6 V
• Voltage - Supply, Digital: 3 V ~ 3.6 V
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: 64-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AD1939
APPLICATION CIRCUITS
Typical application 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 PLL reference are shown in Figure 30. Output filters for the DAC outputs are shown in
Figure 31 and a regulator circuit is shown in Figure 32.
AUDIO
INPUT
Figure 30. Recommended Loop Filters for LRCLK or 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
7
1
LF
4.7µF
4.7µF
+
+
MCLK
562Ω
5.6nF
237Ω
237Ω
NPO
NPO
1nF
1nF
390pF
100pF
ADCxN
ADCxP
Rev. C | Page 30 of 32
OUTN
OUTP
DAC
DAC
Figure 31. Typical DAC Output Filter Circuit (Differential)
Figure 32. Recommended 3.3 V Regulator Circuit
5.62kΩ
VSUPPLY
5.62kΩ
11kΩ
VSENSE
11kΩ
VDRIVE
3.01kΩ
1.50kΩ
270pF
NPO
560pF
NPO
100nF
100nF
1kΩ
68pF
NPO
2
3
B
+
+
–
OP275
+
10µF
10µF
E
C
FZT953
1
604Ω
2.2nF
NPO
5V
3.3V
AUDIO
OUTPUT