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AD1803 データシート(PDF) 4 Page - Analog Devices

部品番号 AD1803
部品情報  Modem/Telephony Codec
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メーカー  AD [Analog Devices]
ホームページ  http://www.analog.com
Logo AD - Analog Devices

AD1803 データシート(HTML) 4 Page - Analog Devices

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AD1803
Rev. A | Page 4 of 32
Parameter
Test Conditions/Comments
Min
Typ
Max
Unit
MONITOR OUTPUT
Digital-to-Analog Converter
Dynamic Range2, 5
−60 dB input, A-weighted
50
dB
THD + N2, 5
0.316
1
%
−50
−40
dB
Programmable Gain/Attenuator
Step Size2
−18 dB to +45 dB
2.4
3.0
3.6
dB
Output Attenuation Span2
63
dB
DIGITAL DECIMATION AND INTERPOLATION
FILTERS2
Pass-Band Edge
−0.22 dB point
0.445 × fS
Hz
Pass-Band
−3.0 dB point
0.490 × fS
Hz
Pass-Band Ripple
0.0
−0.2
dB
Transition Band
0.445 × fS
0.555 × fS
Hz
Stop-Band Edge6
0.555 × fS
Hz
Stop-Band Rejection
Plus 3 dB roll-off
78.0
dB
Group Delay
21/fS
s
Group Delay Variation Over Pass Band
0 kHz to 4 kHz
0.45
μs
0 kHz to 8 kHz
1.30
μs
Sample Rate
6.4
16
kHz
STATIC DIGITAL
VIH, High Level Input Voltage
Digital Inputs
0.65 × DVDD
V
VIL, Low Level Input Voltage
0.35 × DVDD
V
VOH, High Level Output Voltage
IOH = −0.5 mA
0.9 × DVDD
V
VOL, Low Level Output Voltage
IOL = +0.5 mA
0.1 × DVDD
V
Input Leakage Current
−10
+10
μA
Output Leakage Current
−10
+10
μA
POWER SUPPLY
AVDD Range
3.3 V/5 V
3.0/4.75
3.6/5.25
V
DVDD Range
3.3 V/5 V
3.0/4.75
3.6/5.25
V
Analog and Digital Supply Current
5 V, see Table 2
Analog and Digital Supply Current
3.3 V, see Table 2
Power Supply Rejection7
100 mV p-p, signal @ 1 kHz
40
dB
CLOCK
Input Clock Frequency
12.288
24.576
32.768
MHz
Recommended Clock Duty Cycle
45
50
55
%
1 RMS values assume sine wave input.
2 Guaranteed by design, not production tested.
3 All steps tested.
4 The ADC gain is achieved using a 0 dB to 22.5 dB variable gain stage and a 20 dB fixed gain stage. The 22.5 dB to 42.5 dB gain steps are achieved by enabling the 20 dB gain stage.
5 THD + N referenced to full scale.
6 The stop band repeats itself at multiples of 64 × fS, where fS is the sampling frequency. The digital filter attenuates to −78.0 dB or better across the frequency spectrum,
except for a range ±0.555 × fS wide at multiples of 64 × fS.
7 At both analog and digital supply pins (both ADCs and DACs).


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