Datasheet

Data Sheet ADAU1772
Rev. B | Page 7 of 116
Parameter Test Conditions/Comments Min Typ Max Unit
Dynamic Range
1
Headphone mode, 20 Hz to 20 kHz, −60 dB input
With A-Weighted Filter (RMS) AVDD = 1.8 V 104 dB
AVDD = 3.3 V
107
dB
With Flat 20 Hz to 20 kHz Filter
AVDD = 1.8 V
102
dB
AVDD = 3.3 V 104 dB
Signal-to-Noise Ratio
2
Headphone mode, 20 Hz to 20 kHz
With A-Weighted Filter (RMS) AVDD = 1.8 V 105 dB
AVDD = 3.3 V 108 dB
With Flat 20 Hz to 20 kHz Filter
AVDD = 1.8 V
103
dB
AVDD = 3.3 V 106 dB
Interchannel Gain Mismatch Headphone mode 75 mdB
Total Harmonic Distortion + Noise Headphone mode
32 Ω Load −1 dBFS, AVDD = 1.8 V, P
O
= 27 mW −75 dB
−1 dBFS, AVDD = 3.3 V, P
O
= 90 mW −83 dB
24 Ω Load −2 dBFS, AVDD = 1.8 V, P
O
= 28 mW −75 dB
−1 dBFS, AVDD = 3.3 V, P
O
= 118 mW −77 dB
16 Ω Load −3 dBFS, AVDD = 1.8 V, P
O
= 33 mW −75 dB
−1 dBFS, AVDD = 3.3 V, P
O
= 175 mW −83 dB
Headphone Output Power
32 Ω Load AVDD = 1.8 V, <0.1% THD + N 32.5 mW
AVDD = 3.3 V, <0.1% THD + N 111.8 mW
24 Ω Load
AVDD = 1.8 V, <0.1% THD + N
37.6
mW
AVDD = 3.3 V, <0.1% THD + N 148.3 mW
16 Ω Load AVDD = 1.8 V, <0.1% THD + N 41.5 mW
AVDD = 3.3 V, <0.1% THD + N 189.2 mW
Gain Error Headphone mode ±0.25 %
Offset Error ±0.1 mV
Interchannel Isolation 1 kHz, 0 dBFS input signal 100 dB
Power Supply Rejection Ratio CM capacitor = 22 μF
100 mV p-p at 1 kHz
73
dB
CM REFERENCE CM pin
Common-Mode Reference Output AVDD/2 V
Common-Mode Source Impedance 5 kΩ
REGULATOR
Line Regulation
1
mV/V
Load Regulation 6 mV/mA
1
Dynamic range is the ratio of the sum of noise and harmonic power in the band of interest with a −60 dBFS signal present to the full-scale power level in decibels.
2
SNR is the ratio of the sum of all noise power in the band of interest with no signal present to the full-scale power level in decibels.
3
These specifications are with 4.7 µF decoupling and 5.0 kΩ load on pin.
CRYSTAL AMPLIFIER SPECIFICATIONS
Supply voltages AVDD = IOVDD = 1.8 V, DVDD = 1.1 V, unless otherwise noted.
Table 2.
Parameter
Test Conditions/Comments Min Typ Max Unit
Jitter
270
500
ps
Frequency Range 8 27 MHz
Load Capacitance 20 pF