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 TEST CONDITIONS MIN TYP MAX UNIT
Record and playback (all active) 20 24 26
Record and playback (osc, clk, and MIC output powered down) 16 18 20
Total supply current,
Line playback only 6 7.5 9
I
TOT
Total supply current,
No input signal
Record only 11 13.5 15
mA
I
TOT
No input signal
Analog bypass (line in to line out) 4 4.5 6
mA
Power down, DV
DD
= 1.5 V,
Oscillator enabled 0.8 1.5 3
Power down, DV
DD
= 1.5 V,
AV
DD
= BV
DD
= HPV
DD
= 3.3 V
Oscillator disabled 0.01