ak4522 AKM Semiconductor, Inc., ak4522 Datasheet - Page 16
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ak4522
Manufacturer Part Number
ak4522
Description
20bit Stereo ?? Adc & Dac
Manufacturer
AKM Semiconductor, Inc.
Datasheet
1.AK4522.pdf
(18 pages)
Available stocks
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Part Number
Manufacturer
Quantity
Price
Part Number:
ak4522VF-E2
Manufacturer:
AKM
Quantity:
20 000
ASAHI KASEI
4. Analog Outputs
The analog outputs are also single-ended and centered around the VCOM voltage. The input signal range scales with the
supply voltage and nominally 0.58 x VREFH Vpp. The DAC input data format is 2’s complement. The output voltage is
a positive full scale for 7FFFFH(@20bit) and a negative full scale for 80000H(@20bit). The ideal output is VCOM
voltage for 00000H(@20bit). The internal switched-capacitor filter and continuous-time filter remove most of the noise
generated by the delta-sigma modulator of DAC beyond the audio passband.
DC offsets on analog outputs are eliminated by AC coupling since DAC outputs have DC offsets of a few mV. Figure 11
shows the example of external op-amp circuit with 6dB gain. The output signal is inverted by using the circuit in this
case.
M0020-E-01
AOUTL
2.9Vpp
10u
BIAS
+
0.1u
Figure 11. External analog circuit example (gain=6dB)
27u
+
Vop
4.7k
4.7k
10k
Rch Op-amp
- 16 -
Vop
+
-
18k
Optional amp with 6dB gain
NJM5532
10u
+
Vop=12V
27k
Lch Out
5.2Vpp
[AK4522]
1998/10