AD1803 datasheet(4/32 Pages) AD

4 / 32 page

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

THD + N2, 5

0.316

−50

−40

Programmable Gain/Attenuator

Step Size2

−18 dB to +45 dB

2.4

3.0

3.6

Output Attenuation Span2

DIGITAL DECIMATION AND INTERPOLATION

FILTERS2

Pass-Band Edge

−0.22 dB point

0.445 × fS

Pass-Band

−3.0 dB point

0.490 × fS

Pass-Band Ripple

0.0

−0.2

Transition Band

0.445 × fS

0.555 × fS

Stop-Band Edge6

0.555 × fS

Stop-Band Rejection

Plus 3 dB roll-off

78.0

Group Delay

21/fS

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

kHz

STATIC DIGITAL

VIH, High Level Input Voltage

Digital Inputs

0.65 × DVDD

VIL, Low Level Input Voltage

0.35 × DVDD

VOH, High Level Output Voltage

IOH = −0.5 mA

0.9 × DVDD

VOL, Low Level Output Voltage

IOL = +0.5 mA

0.1 × DVDD

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

DVDD Range

3.3 V/5 V

3.0/4.75

3.6/5.25

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

CLOCK

Input Clock Frequency

12.288

24.576

32.768

MHz

Recommended Clock Duty Cycle

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).

AD1803 Datasheet(PDF) 4 Page - Analog Devices

AD1803 Datasheet(HTML) 4 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

Datasheet Download

Link URL