PCM1795DBRG4.B datasheet(6/68 Pages) TI2

6 / 68 page

PCM1795

SLES248A – MAY 2009 – REVISED MARCH 2015

www.ti.com

6.4 Thermal Information

PCM1795

THERMAL METRIC(1)

DB (SSOP)

UNIT

28 PINS

RθJA

Junction-to-ambient thermal resistance

70.3

RθJC(top)

Junction-to-case (top) thermal resistance

28.3

RθJB

Junction-to-board thermal resistance

31.5

°C/W

ψJT

Junction-to-top characterization parameter

2.9

ψJB

Junction-to-board characterization parameter

31.1

RθJC(bot)

Junction-to-case (bottom) thermal resistance

—

(1)

For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report (SPRA953).

6.5 Electrical Characteristics

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.

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

Logic family

TTL 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

(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 53.

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