PCM1804-Q1_15 Datasheet, PDF (29/36 Pages) Texas Instruments – FULL DIFFERENTIAL ANALOG INPUT 24-BIT, 192-kHz STEREO A/D CONVERTER

PCM1804-Q1
www.ti.com
SLES271A – JUNE 2012 – REVISED AUGUST 2012
Analog In
4.7 kΩ
4.7 kΩ
R₃ = 1 kΩ
C⁽¹⁾
_
10 µF _{R1 = 3.3 kΩ}
+
+
OPA2134 1/2
_
R₅ = 47 Ω
+
OPA2134 1/2
0.1 µF
R₄ = 1 kΩ
C⁽¹⁾
PCM1804
V_IN−
0.01 µF
V_COM
10 µF _{R2 = 3.3 kΩ}
_
+
+
R₆ = 47 Ω
V_IN+
OPA2134 1/2
S0059-01
(1) A capacitor value of 1800 pF is recommended, unless an input signal greater than –6 dBFS at 100 kHz or higher is
applied in the DSD mode. In that case, 3300 pF is recommended.
Figure 44. Application Circuit for Single-Ended Input Circuit (PCM)
BGR
V_IN+
V_IN−
_
+
∆Σ Modulator
V_COM
V_REF
_
+
S0060-01
Figure 45. Equivalent Circuit of Internal Reference (V_COM, V_REF)
Copyright © 2012, Texas Instruments Incorporated
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