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PCM3000 Datasheet(PDF) 21 Page - Burr-Brown (TI)

[Old version datasheet] Texas Instruments acquired Burr-Brown Corporation. Click here to check the latest version.
Part # PCM3000
Description  Stereo Audio CODEC 18-BITS, SERIAL INTERFACE TM
PDF  21 Pages
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Manufacturer  BURR-BROWN [Burr-Brown (TI)]
Direct Link  http://www.burr-brown.com
Logo BURR-BROWN - Burr-Brown (TI)

PCM3000 Datasheet(HTML) 21 Page - Burr-Brown (TI)

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21
PCM3000/3001
FIGURE 16. Quantization Noise Spectrum.
Out
64f
S (256fS)
In
8f
S
18-Bit
+
+
+
4
3
2
1
0
5-level Quantizer
+
–
+
Z–1
+
–
+
Z–1
+
+
Z–1
FIGURE 15. 5-Level
∆Σ Modulator Block Diagram.
3rd ORDER
∆Σ MODULATOR
Frequency (kHz)
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
–140
–150
0
5
10
15
20
25
30
+
+
–
+
+
+
5th SW-CAP
Integrator
4th SW-CAP
Integrator
3rd SW-CAP
Integrator
2nd SW-CAP
Integrator
1st SW-CAP
Integrator
+
+
+
+
–
+
+
–
1-Bit
DAC
H(z)
Qn(z)
Analog In
X(z)
Digital Out
Y(z)
Y(z) = STF(z) • X(z) + NTF(z) • Qn(z)
Signal Transfer Function
Noise Transfer Function
STF(z) = H(z) / [1 + H(z)]
NTF(z) = 1/ [1 + H(z)]
Comparator
FIGURE 14. Simplified 5th-Order Delta-Sigma Modulator.



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