Analog Devices AD1849K, Руководство пользователя

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AD1849K–SPECIFICATIONS
REV. 0
–2–
ELECTRICAL SPECIFICATIONS
STANDARD TEST CONDITIONS UNLESS OTHERWISE NOTED
Temperature 25
°
C DAC Input Conditions
Digital Supply (V
DD
) 5.0 V 0 dB Attenuation
Analog Supply (V
CC
) 5.0 V Full-Scale Digital Inputs
Clock (SCLK) 256 F
S
16-Bit Linear Mode
Master Mode 256 Bits per Frame OLB = 1
Word Rate (F
S
) 48 kHz ADC Input Conditions
Input Signal 1 kHz 0 dB PGA Gain
Analog Output Passband 20 Hz to 20 kHz –3.0 dB Relative to Full Scale
V
IH
2.4 V Line Input
V
IL
0.8 V 16-Bit Linear Mode
External Load Impedance 10 k
Ω
(Line 0)
All tests are performed on all ADC and DAC channels.
External Load Impedance 48
Ω
(Line 1)
External Load Capacitance 100 pF
(Line 0, 1)
ANALOG INPUT
Min Typ Max Units
Input Voltage*
(RMS Values Assume Sine Wave Input)
Line and Mic with 0 dB Gain 0 94 0.99 1.04 V rms
2.66 2.80 2.94 V p-p
Mic with +20 dB Gain 0.094 0.099 0.104 V rms
0.266 0.280 0.294 V p-p
Input Capacitance 15 pF
*Accounts for Sum of Worst Case Reference Errors and Worst Case Gain Errors.
PROGRAMMABLE GAIN AMPLIFIER—ADC
Min Typ Max Units
Step Size (0 dB to 22.5 dB) 1.3 1.5 1.7 dB
(All Steps Tested, –30 dB Input)
PGA Gain Range*
Line and Mic with 0 dB Gain –0.2 22.7 dB
Mic with +20 dB Gain 19.8 42.7 dB
DIGITAL DECIMATION AND INTERPOLATION FILTERS*
Min Max Units
Passband 0 0.45
×
F
S
Hz
Passband Ripple
±
0.1 dB
Transition Band 0.45
×
F
S
0.55
×
F
S
Hz
Stopband
≥
0.55
×
F
S
Hz
Stopband Rejection 74 dB
Group Delay 30/F
S
Group Delay Variation Over Passband 0.0
µ
s