DSD1791

SLES072B − MARCH 2003 − REVISED NOVEMBER 2006

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3

ELECTRICAL CHARACTERISTICS (Continued)

all specifications at TA = 25°C, VCC = 5 V, VDD = 3.3 V, fS = 44.1 kHz, system clock = 256 fS, and 24-bit data, unless otherwise noted

PARAMETER

TEST CONDITIONS

DSD1791DB

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

DIGITAL INPUT/OUTPUT

Logic family

TTL compatible

VIH

Input logic level

2

VDC

VIL

Input logic level

0.8

VDC

IIH

Input logic current

VIN = VDD

10

A

IIL

Input logic current

VIN = 0 V

–10

µA

VOH

Output logic level

IOH = –2 mA

2.4

VDC

VOL

Output logic level

IOL = 2 mA

0.4

VDC

DYNAMIC PERFORMANCE (PCM MODE) (1)

fS = 44.1 kHz

0.001%

0.002%

THD+N at VOUT = 0 dB

fS = 96 kHz

0.0015%

THD+N at VOUT = 0 dB

fS = 192 kHz

0.003%

EIAJ, A-weighted, fS = 44.1 kHz

110

113

Dynamic range

EIAJ, A-weighted, fS = 96 kHz

113

dB

Dynamic range

EIAJ, A-weighted, fS = 192 kHz

113

dB

EIAJ, A-weighted, fS = 44.1 kHz

110

113

Signal-to-noise ratio

EIAJ, A-weighted, fS = 96 kHz

113

dB

Signal-to-noise ratio

EIAJ, A-weighted, fS = 192 kHz

113

dB

fS = 44.1 kHz

106

110

Channel separation

fS = 96 kHz

110

dB

Channel separation

fS = 192 kHz

109

dB

Level linearity error

VOUT = –120 dB

±1

dB

DYNAMIC PERFORMANCE (DSD MODE) (1) (2)

THD+N at VOUT = 0 dB

2.1 V rms

0.001%

Dynamic range

–60 dB, EIAJ, A-weighted

113

dB

Signal-to-noise ratio

EIAJ, A-weighted

113

dB

ANALOG OUTPUT

Gain error

–8

±3

8

% of FSR

Gain mismatch, channel-to-channel

–3

±0.5

3

% of FSR

Bipolar zero error

At BPZ

–2

±0.5

2

% of FSR

Differential output voltage (3)

Full scale (0 dB)

3.2

V p-p

Bipolar zero voltage (3)

At BPZ

1.4

V

Load impedance (3)

R1 = R2

1.7

k

Ω

(1) Dynamic performance and dc accuracy are specified at the output of the postamplifier as shown in Figure 33. Analog performance specifications

are measured using the System Two

t Cascade audio measurement system by Audio Precisiont in the averaging mode. For all

sampling-frequency operations, measurement bandwidth is limited with a 20-kHz AES17 filter.

(2) Analog performance in the DSD mode is specified as the DSD modulation index of 100%. This is equivalent to PCM mode performance at

44.1 kHz and 64 fS.

(3) These parameters are defined at the DSD1791 output pins. Load impedances, R1 and R2, are input resistors of the postamplifier. They are defined

as dc loads.

Audio Precision and System Two are trademarks of Audio Precision, Inc.

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