PCM1804
SLES022A – DECEMBER 2001
APPLICATION INFORMATION
R3 = 909 Ω
100 pF (See Note)
4.99 kΩ
PCM1804
4.99 kΩ
10 µ
_
+
R1 = 3 kΩ
Analog In
_
R5 = 51.1 Ω
+
V
IN–
+
100 pF
OPA2134 1/2
OPA2134 1/2
V
COM
0.022 µF
R4 = 909 Ω
100 pF (See Note)
0.1 µF
10 µ
R2 = 3 kΩ
_
+
R6 = 51.1 Ω
+
V
IN+
100 pF
OPA2134 1/2
NOTE: 3300 pF is recommended if the input signal level is more than –6 dB of FS at 100 kHz is applied in DSD mode.
Figure 44. Application Circuit for Single-Ended Input Circuit (PCM)
V
V
+
IN
∆Σ Modulator
–
IN
_
+
V
COM
V
REF
BGR
_
+
Figure 45. Equivalent Circuit of Internal Reference (V
, V
)
COM REF
29
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