參數(shù)資料
型號(hào): FEDL7204-001DIGEST-01
廠商: OKI SEMICONDUCTOR CO., LTD.
元件分類(lèi): Codec
英文描述: The ML7204-001 is a speech CODEC for VoIP.
中文描述: 在ML7204 - 001是一種VoIP語(yǔ)音編解碼器。
文件頁(yè)數(shù): 15/42頁(yè)
文件大小: 792K
代理商: FEDL7204-001DIGEST-01
FEDL7204-001DIGEST-01
OKI Semiconductor
ML7204-001
15/42
Timings of PDNB, XO, and AVREF
(AVDD = 3.0 to 3.6 V, DVDD0, 1, 2 = 3.0 to 3.6 V, AGND = DGND0, 1, 2
= 0.0 V, Ta = –20 to 60
°
C unless otherwise specified)
Condition
Min.
Parameter
Symbol
Typ.
Max.
Unit
Power-down signal pulse
width
AVDD supply delay time
Oscillation activation time
tPDNB
PDNB pin
250
μ
s
tAVDDON
txtal
0
20
ns
ms
AVREF = 1.4 (90%)
C5 = 4.7
μ
F, C6 = 0.1
μ
F
(See Figure 9)
AVREF = 1.4 (90%)
C5 = 2.2
μ
F, C6 = 0.1
μ
F
(See Figure 9)
600
ms
AVREF rise time
tAVREF
300
ms
Figure 1 Timings of PDNB, XO, and AVREF
(Note)
The capacitance of the AVREF capacitor (C5) affects the AVREF rise time and analog characteristics. If
weight is given to the analog characteristics, specify 4.7
μ
F, and if it is given to the AVREF rise time, specify
2.2
μ
F. The electrical characteristics for the analog characteristics that are described above are guaranteed in
both capacitances.
PDNB
0 V
DVDD
t
PDNB
DVDD
AVDD
0 V
DVDD
AVDD
VREGOUT
0 V
Approx.
2.5V
t
AVDDON
AVREF
Approx.
1.4 V
0 V
XO
0 V
AVDD
txtal
t
AVREF
90%
DVDDAVDD
90%
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