PCM1795DB datasheet(3/58 Pages) TI

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ELECTRICAL CHARACTERISTICS

PCM1795

www.ti.com ........................................................................................................................................................................................................ SLES248 – MAY 2009

All specifications at TA = +25°C, VCC1 = VCC2L = VCC2R = 5 V, VDD = 3.3 V, fS = 48 kHz, system clock = 256 fS, and 32-bit

data, unless otherwise noted.

PCM1795 DB

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

RESOLUTION

Resolution

Bits

DATA FORMAT (PCM Mode)

Audio data interface format

Standard, I2S, left-justified

Audio data bit length

16-, 24-, 32-bit selectable

Audio data format

MSB first, twos complement

Sampling frequency

200

kHz

System clock frequency

128, 192, 256, 384, 512, 768

DATA FORMAT (DSD Mode)

Audio data interface format

DSD (direct stream digital)

Audio data bit length

Bit

Sampling frequency

2.8224

MHz

System clock frequency

2.8224

11.2986

MHz

DIGITAL INPUT/OUTPUT

TTL

Logic family

compatible

VIH

VDC

Input logic level

VIL

0.8

VDC

IIH

VIN = VDD

µA

Input logic current

IIL

VIN = 0 V

–10

µA

VOH

IOH = –2 mA

2.4

VDC

Output logic level

VOL

IOL = 2 mA

0.4

VDC

DYNAMIC PERFORMANCE (PCM MODE)(1)(2)

fS = 48 kHz

0.0005

0.001

THD+N at VOUT = 0 dB

fS = 96 kHz

0.001

fS = 192 kHz

0.0015

EIAJ, A-weighted, fS = 48 kHz

120

123

Dynamic range

EIAJ, A-weighted, fS = 96 kHz

123

EIAJ, A-weighted, fS = 192 kHz

123

EIAJ, A-weighted, fS = 48 kHz

120

123

Signal-to-noise ratio

EIAJ, A-weighted, fS = 96 kHz

123

EIAJ, A-weighted, fS = 192 kHz

123

fS = 48 kHz

116

119

Channel separation

fS = 96 kHz

118

fS = 192 kHz

117

Level linearity error

VOUT = –120 dB

±1

(1)

Filter condition:

THD+N: 20-Hz high-pass filter (HPF), 20-kHz AES17 low-pass filter (LPF)

Dynamic range: 20-Hz HPF, 20-kHz AES17 LPF, A-weighted

Signal-to-noise ratio: 20-Hz HPF, 20-kHz AES17 LPF, A-weighted

Channel separation: 20-Hz HPF, 20-kHz AES17 LPF

Analog performance specifications are measured using the System Two™ Cascade audio measurement system by Audio Precision™ in

the averaging mode.

(2)

Dynamic performance and dc accuracy are specified at the output of the post-amplifier as shown in Figure 52.

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