ml7214a-001 Oki Semiconductor, ml7214a-001 Datasheet - Page 14

• Manufacturer Part Number: ml7214a-001
• Description: Voip Codec
• Manufacturer: Oki Semiconductor

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 µF, and if it is given to the AVREF rise time, specify
2.2 µF. The electrical characteristics for the analog characteristics that are described above are guaranteed in
both capacitances.
OKI Semiconductor
Power-down signal pulse
width
AVDD supply delay time
Oscillation activation time
AVREF rise time
VREGOUT
AVREF
DVDD
AVDD
PDNB
Parameter
XO
DVDD AVDD
t
AVDDON
t
90%
PDNB
90%
tAVDDON
tAVREF
Figure 1 Timings of PDNB, XO, and AVREF
Symbol
tPDNB
txtal
txtal
(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)
t
AVREF
C5 = 4.7 µF, C6 = 0.1 µF
C5 = 2.2 µF, C6 = 0.1 µF
AVREF = 1.4 (90%)
AVREF = 1.4 (90%)
(See Figure 9)
(See Figure 9)
PDNB pin
Condition
—
—
Min.
250
—
—
—
0
Typ.
—
—
—
—
—
FEDL7214_001DIGEST-P
Max.
600
300
20
—
—
ML7214-001
Approx.
1.4 V
DVDD
AVDD
0 V
Approx.
2.5V
0 V
DVDD
0 V
AVDD
0 V
0 V
Unit
ms
ms
ms
µs
ns
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