Datasheet

2−4
2.3.4 Stereo Headphone Output
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
0-dB full-scale output voltage 1.0 V
RMS
Maximum output power, P
O
R
L
= 32 Ω 30
mW
R
L
= 16 Ω 40
mW
Signal-to-noise ratio, A-weighted (see Note 4) AV
DD
= 3.3 V 90 97 dB
Total harmonic distortion
AV
DD
= 3.3 V,
P
O
= 10 mW 0.1
%
Total harmonic distortion
AV
DD
= 3.3 V,
1 kHz output
P
O
= 20 mW 1.0
%
Power supply rejection ratio 1 kHz, 100 mV
pp
50 dB
Programmable gain 1 kHz output −73 6 dB
Programmable-gain step size 1 dB
Mute attenuation 1 kHz output 80 dB
NOTE 4: All performance measurements done with 20-kHz low-pass filter and, where noted, A-weighted filter. Failure to use such a filter results
in higher THD + N and lower SNR and dynamic range readings than shown in the Electrical Characteristics. The low-pass filter removes
out-of-band noise, which, although not audible, may affect dynamic specification values.
2.3.5 Analog Reference Levels
PARAMETER MIN TYP MAX UNIT
Reference voltage AVDD/2 − 50 mV AVDD/2 + 50 mV V
Divider resistance 40 50 60 kΩ
2.3.6 Digital I/O
PARAMETER MIN TYP MAX UNIT
V
IL
Input low level 0.3 × BV
DD
V
V
IH
Input high level 0.7 × BV
DD
V
V
OL
Output low level 0.1 × BV
DD
V
V
OH
Output high level 0.9 × BV
DD
V
2.3.7 Supply Current
PARAMETER MIN TYP MAX UNIT
Record and playback (all active) 23
Record and playback (osc, clk, and MIC output powered down) 18
Total supply current,
Line playback only 7
I
TOT
Total supply current,
No input signal
Record only 13
mA
I
TOT
No input signal
Analog bypass (line in to line out) 4
mA
Power down
Oscillator enabled 1.5
Power down
Oscillator disabled 0.01