Datasheet

REV. 0–2–
AD1955–SPECIFICATIONS
ANALOG PERFORMANCE
Parameter Min Typ Max Unit
Resolution 24 Bits
SIGNAL-TO-NOISE RATIO (20 Hz to 20 kHz)*
Differential Output (A-Weighted, RMS) (Stereo) 120 114 dB
Differential Output (A-Weighted, RMS) (Mono) 123 dB
Single-Ended (A-Weighted, RMS) (Stereo) 119 dB
DYNAMIC RANGE (20 Hz to 20 kHz, –60 dB Input)*
Differential Output (A-Weighted, RMS) (Stereo) 120 114 dB
Differential Output (A-Weighted, RMS) (Mono) 123 dB
Single-Ended (A-Weighted, RMS) (Stereo) 119 dB
Total Harmonic Distortion + Noise (Stereo) at 0 dBFS –110 –102.5 dB
ANALOG OUTPUTS
Differential Output Range (Full Scale) 8.64 mA p-p
Output Capacitance at Each Output Pin 100 pF
Output Bias Current, Each Output –3.24 mA
Out-of-Band Energy (0.5  f
S
to 100 kHz) –90 dB
Reference Voltage 2.245 2.39 2.505 V
DC ACCURACY
Gain Error ± 6%
Interchannel Gain Mismatch 0.01 0.26 dB
Gain Drift 25 ppm/°C
Interchannel Crosstalk (EIAJ Method) –125 dB
Interchannel Phase Deviation ± 0.1 Degrees
Mute Attenuation –100 dB
De-Emphasis Gain Error ± 0.1 dB
*Measured with Audio Precision System Two Cascade in RMS Mode. Averaging Mode will show approximately 2 dB better performance.
Performance of right and left channels are identical (exclusive of the Interchannel Gain Mismatch and Interchannel Phase Deviation specifications).
Specifications subject to change without notice.
TEST CONDITIONS
(Unless otherwise noted.)
Analog Supply Voltages (AV
DD
) . . . . . . . . . . . . . . . . . . . . 5 V
Digital Supply Voltages (DV
DD
) . . . . . . . . . . . . . . . . . . . . 5 V
Reference Current (I
REF
) . . . . . . . . . . . . . . . . . . . . . 0.960 mA
Ambient Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . 25°C
Input Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.288 MHz
Input Signal . . . . . . . . . . . . . . . . . 984.375 Hz, 0 dB Full Scale
Input Sample Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 kHz
Measurement Bandwidth . . . . . . . . . . . . . . . . 20 Hz to 20 kHz
Word Width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Bits
Load Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 pF
Load Impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 kΩ
Input Voltage HI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.4 V
Input Voltage LO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.8 V
(See figures. I
REF
= 0.960 mA, V
BIAS
= 2.80 V.)