AD1985 Datasheet, PDF (6/48 Pages) Analog Devices – AC ’97 SoundMAX Codec

AD1985
ANALOG OUTPUT
Table 9.
Parameter
Min
Typ
Max
Unit
FULL-SCALE OUTPUT VOLTAGE: LINE OUT, MONO OUT, CENTER, LFE
1
V rms
2.83
V p-p
Output Impedance¹
300
500
Ω
External Load Impedance¹
2
10
kΩ
Output Capacitance¹
15
pF
External Load Capacitance
1000
pF
FULL-SCALE OUTPUT VOLTAGE: HP_OUT
1
V rms
2.83
V p-p
External Load Capacitance¹
1000
pF
External Load Impedance¹
32
Ω
VREF
VREFOUT (VREFH, VREFD = 00 in REGISTER 0x76)
VREFOUT (VREFH, VREFD = 10)
VREFOUT (VREFH, VREFD = 11)
2.1
2.25
2.4
V
2.25
V
3.70
V
0.0
V
VREFOUT CURRENT DRIVE
5
mA
MUTE CLICK (MUTED OUTPUT UNMUTED MIDSCALE DAC OUTPUT)
±5
mV
Note that setting VREFOUT to 0 V reduces crosstalk when Center/LFE is sharing the MIC jack. The Center/LFE crosstalk should be better than −60 dB at 100 Hz when sharing
with a stereo microphone application circuit.
STATIC DIGITAL SPECIFICATIONS
Table 10.
Parameter
DIGITAL INPUTS/OUTPUTS
High Level Input Voltage (VIH)
Low Level Input Voltage (VIL)
High Level Output Voltage (VOH), IOH = 2 mA
Low Level Output Voltage (VOL), IOL = 2 mA
INPUT LEAKAGE CURRENT
OUTPUT LEAKAGE CURRENT
INPUT/OUTPUT PIN CAPACITANCE
Min
Typ
0.65 × DVDD
0.9 × DVDD
–10
–10
Max
Unit
V
0.35 × DVDD V
V
0.1 × DVDD
V
+10
µA
+10
µA
7.5
pF
POWER SUPPLY
Table 11.
Parameter
POWER SUPPLY RANGE—ANALOG (AVDD)
POWER SUPPLY RANGE—DIGITAL (DVDD)
POWER DISSIPATION—5 V/3.3 V
POWER SUPPLY REJECTION (100 mV p-p SIGNAL @ 1 kHz)¹
1 _{Guaranteed, not tested.}
Min
Typ
Max
Unit
4.5
5.5
V
2.97
3.63
V
465
mW
40
dB
Rev. A | Page 6 of 48