參數(shù)資料
型號(hào)： PCD5096
廠商： NXP Semiconductors N.V.
元件分類： Codec
英文描述： Universal codec
中文描述： 通用編解碼器
文件頁數(shù)： 44/52頁
文件大?。?/td> 222K
代理商： PCD5096
1997 Jan 22
44
Philips Semiconductors
Preliminary specification
Universal codec
PCD5096
Table 45
Digital I/Os
Notes
1.
2.
3.
4.
5.
I
OH
=
8 mA for pins EARM_HF and EARP_HF. I
OH
=
2 mA for pins IO0 and IO1.
I
OL
= 8 mA for pins EARM_HF, EARP_HF and DO. I
OL
= 2 mA for pins IO0 and IO1.
Pull-down resistor present at pin TEST. Pull-up resistor present at pins IO0 and IO1.
For SDA pin, I
OL
= 3 mA at 5 V, 1 mA at 3.3 V and 0.7 mA at 2.7 V.
Output fall time of SDA measured from V
IH(min)
to V
IL(max)
.
Table 46
Analog supplies
Notes
1.
VBGP output current is zero. Decoupling capacitance between pins VBGP and V
SSA_1
is 100 nF at 25
°
C.
The bandgap has a temperature coefficient between
0.2 and +0.2 mV/
°
C.
V
ref
stands for VREF1 or VREF2. V
ref
output current is zero. Decoupling capacitance between VREF1 and V
SSA_1
,
or between VREF2 and V
SSA_2
is between 1
μ
F and 100
μ
F, with a 100 nF capacitance in parallel. The voltage is
programmed by setting the appropriate value (80H to BFH) for each codec, in Control Register 3. VMIC_HS and
VMIC_HF output current is zero (e.g. by setting bits 6 and 7 in Control Register 3 to a logic 0. The output can only
source current (i.e. not sink).
Pins VMIC_HS and VMIC_HF (called VMIC below) are internally connected to VREF2 via two switches.
The VMIC_HS switch is closed by setting the HSMICON bit in Control Register 0 to a logic 1. The VMIC_HF switch
is closed by setting the HFMICON bit in Control Register 0 to a logic 1. The VMIC DC output current is 400
μ
A
maximum, and VREF2 must be programmed to its typical value. Use a low pass filter (resistor + capacitor) between
VMIC and V
SSA_2
of 100
+ 10
μ
F, with a 100 nF capacitance in parallel. VMIC adjustment can only be done by
adjusting VREF2.
Valid for both VMIC_HS and VMIC_HF pins.
2.
3.
4.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
μ
A
V
V
V
V
k
k
ns
I
LI
V
IH
V
IL
V
OH
V
OL
R
pd
R
pu
t
o(f)
leakage current input pins
HIGH-level input voltage
LOW-level input voltage
HIGH-level output voltage
LOW-level output voltage
equivalent pull-down resistor
equivalent pull-up resistor
SDA output fall time
0.7V
DD_1
0.8V
DD_1
50
100
1
0.3V
DD_1
0.4
250
note 1
notes 2 and 4
note 3
note 3
notes 4 and 5
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
V
bgp
V
ref
R
vmic
bandgap voltage
reference voltage
microphone supply output resistance
note 1
notes 2 and 3
note 4
1
1.975
1.2
2.000
75
1.5
2.025
150
V
V
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