Datasheet

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SLAS357 − DECEMBER 2001
5
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recommended operating conditions (see Note 2)
MIN NOM MAX UNIT
Supply voltage, DVDD, EARVDD 2.7 3.3 V
High-level input voltage, V
IH
0.7x V
DD
V
Low-level input voltage, V
IL
0.3x V
DD
V
Load impedance between EAROUT+ and EAROUT−, R
L
8 to 32 Ω
Input voltage, MICIN 0.9x V
DD
V
Operating free-air temperature, T
A
−40 85 _C
NOTES: 1. To avoid possible damage and resulting reliability problems to these CMOS devices, follow the power-on initialization paragraph,
described in the Principles of Operations.
2. Voltages are with respect to DVSS, and EARVSS.
electrical characteristics over recommended ranges of supply voltage and operating free-air temperature
(unless otherwise noted)
supply current
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
I
DD
Supply current from V
DD
Operating 5 7 mA
I
DD
Supply current from V
DD
Power down, MCLK not present
10 30 µA
t
pu
Power-up time from power down 10 ms
digital interface
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
OH
High-level output voltage, PCMO I
OH
= −3.2 mA, V
DD
= 3 V DVDD−0.25 V
V
OL
Low-level output voltage, PCMO I
OL
= 3.2 mA, V
DD
= 3 V 0.2 V
I
IH
High-level input current, any digital input V
I
= 2.2 V to V
DD
10 µA
I
IL
Low-level input current, any digital input V
I
= 0 to 0.8 V 10 µA
C
I
Input capacitance 10 pF
C
o
Output capacitance 20 pF
microphone interface
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
IO
Input offset voltage See Note 3 −5 5 mV
I
IB
Input bias current −250 250 nA
C
i
Input capacitance 5 pF
V
n
Microphone input referred noise, psophometric weighted
MIC Amp 1 gain = 23.5 dB,
See Note 4
2.9 4 µV
rms
MICMUTE −80 dB
NOTES: 3. Measured while MICIN+ and MICIN− are connected together. Less than a 0.5-mV offset results in 0 value code on PCMOUT.
4. Configured as shown in Figure 3.