AD1939YSTZ Analog Devices Inc, AD1939YSTZ Datasheet - Page 30
![IC CODEC 24BIT ADC/DAC 64LQFP](/photos/6/60/66065/505-64-lqfp_sml.jpg)
AD1939YSTZ
Manufacturer Part Number
AD1939YSTZ
Description
IC CODEC 24BIT ADC/DAC 64LQFP
Manufacturer
Analog Devices Inc
Type
General Purposer
Datasheet
1.AD1939YSTZ.pdf
(32 pages)
Specifications of AD1939YSTZ
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
Audio Codec Type
Stereo
No. Of Adcs
4
No. Of Dacs
8
No. Of Input Channels
4
No. Of Output Channels
8
Adc / Dac Resolution
24bit
Adcs / Dacs Signal To Noise Ratio
112dB
Single Supply Voltage (typ)
3.3/5V
Single Supply Voltage (min)
3/4.5V
Single Supply Voltage (max)
3.6/5.5V
Package Type
LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
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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