參數(shù)資料
型號: AK7716VT
英文描述: Consumer IC
中文描述: 消費性IC
文件頁數(shù): 58/60頁
文件大?。?/td> 1171K
代理商: AK7716VT
[ASAHI KASEI]
[AK7716]
<M0057-E-01>
1999/09
- 58 -
12-2-6) Analog output
Fig. 3 Example of output LPF circuit
The analog output s are full differential outputs and nominally 2.8Vpp (typ @ VREF=5V) centered in the internal common voltage about
(AVDD/2). The differential outputs are summed externally, VAOUT=(AOUT+)-(AOUT-) between AOUT+ and AOUT-.
If the summing gain is 1, the output range is VAOUT = 5.6Vpp(typ@ VREF=5V). The bias voltage of external summing circuit is supplied
externally.
The input data format is 2’s complement. The output voltage is a positive full scale for 7FFFFFH(@24bit) and a negative full scale for
800000H(@24bit). The ideal AOUT is 0V for 000000H(@24bit).
The internal switched-capacitor filter and external LPF attenuate the noise generated by the delta-sigma modulator beyond the audio
passband.
Differential outputs can eliminate few mV+AVDD/2 DC offset on analog outputs with capacitors.
Fig.3 shows the example of external op-amp circuit summing the differential outputs.
12-2-7) Connection to digital circuit
To minimize the noise resulting from the digital circuit, connect CMOS logic to the digital output. The applicable logic family includes the
4000B, 74HC, 74AC, 74ACT and 74HCT series.
NJM5532D
AOUT+
220
750p
10k
390
5.1k
5.1k
AOUT-
AOUT
+
-
+
33u
2.8Vpp
2.8Vpp
Vop
5.1k
+
+
750p
5.1k
33u
6.8n
390
22u
5.6Vpp
6.8n
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