AD1845

–38–

REV. C

APPENDIX

EXTENDED TEMPERATURE SPECIFICATIONS

Test Conditions

The AD1845 has been tested over the industrial temperature range. The typical values represent the limits that change with tempera-

ture. All other limits remain unchanged.

Temperature

–40

°C to +85°C

DAC Test Conditions

5.0 V

Calibrated

5.0 V

0 dB Attenuation

48 kHz

16-Bit Linear Mode

Input Signal

1008 Hz

Mute Off, OL = 0

Analog Output Passband

20 Hz to 20 kHz

2.0 V

ADC Input Conditions

0.8 V

Calibrated

2.4 V

0 dB Gain

0.4 V

–1.0 dB Relative to Full Scale

Line Input

16-Bit Linear Mode

PROGRAMMABLE GAIN AMPLIFIER—ADC

Parameter

Min

Typ

Max

Units

Step Size (All Steps Tested) (0 dB to 22.5 dB)

1.75

dB

PGA Gain Range Span

22.83

dB

AUXILIARY, LINE, MONO, AND MICROPHONE INPUT

ANALOG GAIN/AMPLIFIERS/ATTENUATORS

Parameter

Min

Typ

Max

Units

Step Size AUX1, AUX2, LINE, MIC (All Steps Tested):

(+12 dB to –34.5 dB, Referenced to DAC Full Scale)

1.5

dB

Step Size: M_IN (All Steps Tested) (0 dB to –45 dB)

3.0

dB

Input Gain/Attenuation Range: AUX1, AUX2, LINE, MIC

46.2

dB

Input Gain/Attenuation Range: M_IN

43.5

dB

ANALOG-TO-DIGITAL CONVERTERS

Parameter

Min

Typ

Max

Units

Dynamic Range (–60 dB Input THD+N Referenced to

Full Scale, A-Weighted)

–81

dB

THD+N (Referenced to Full Scale)

–76

dB

DIGITAL-TO -ANALOG CONVERTERS

Parameter

Min

Typ

Max

Units

Dynamic Range (–60 dB Input THD+N Referenced to

Full Scale, A-Weighted)

–82

dB

THD+N (Referenced to Full Scale)

–78

dB

DAC ATTENUATOR

Parameter

Min

Typ

Max

Units

Step Size (0 dB to –22.5 dB)

–1.5

dB

ANALOG OUTPUT

Parameter

Min

Typ

Max

Units

2.36

V