AD1848 datasheet(2/28 Pages) AD

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AD1848K–SPECIFICATIONS

REV. 0

–2–

STANDARD TEST CONDITIONS UNLESS

OTHERWISE NOTED

Temperature

°C

Digital Supply (VDD)

5.0

Analog Supply (VCC)

5.0

Word Rate (FS)

kHz

Input Signal

1008

Analog Output Passband

20 Hz to 20 kHz

ADC FFT Size

2048

DAC FFT Size

8192

VIH

2.4

VIL

0.8

VOH

2.4

VOL

0.4

ANALOG INPUT

Min

Typ

Max

Units

Input Voltage (RMS Values Assume Sine Wave Input)

Line

V rms

2.6

2.8

3.0

V p-p

Mic with +20 dB Gain (MGE = 1)

0.1

V rms

0.26

0.28

0.3

V p-p

Mic with 0 dB Gain (MGE = 0)

V rms

2.6

2.8

3.0

V p-p

Input Impedance

Ω

Input Capacitance

PROGRAMMABLE GAIN AMPLIFIER—ADC

Min

Typ

Max

Units

Step Size (0 dB to 22.5 dB)

1.3

1.5

1.7

(All Steps Tested, –30 dB Input)

PGA Gain Range Span*

21.5

22.5

23.5

AUXILIARY INPUT ANALOG AMPLIFIERS/ATTENUATORS

Min

Typ

Max

Units

Step Size (+12.0 dB to –33.0 dB)

1.3

1.5

1.7

(All Steps Tested, –14.5 dB Input)

Auxiliary Gain/Attenuation Range Span*

45.5

46.5

47.5

DAC Input Conditions

Post-Autocalibrated

0 dB Attenuation

–2.0 dB Relative to Full Scale

16-Bit Linear Mode

No Output Load

Mute Off

ADC Input Conditions

Post-Autocalibrated

0 dB Gain

–3.0 dB Relative to Full Scale

Line Input

16-Bit Linear Mode

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