STW5094AD datasheet(43/51 Pages) STMICROELECTRONICS

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STw5094A

STEREO AUDIO DAC and FM CHARACTERISTICS

Unless otherwise specified, VCC = 2.7V to 3.3V, Tamb = -30°C to 85°C; typical characteristics are speci-

fied at VCC = 3V, VCMHP=1.5V, Tamb =25°C; fAMCK = 13.0MHz; Full-Scale Input Sine Waves at

1015.625Hz; Input Sample Rate (Fs) = 48kHz; Input Data = 18Bits; Measurement Bandwidth is 20Hz to

20kHz, unweighted. Resistive load on HPL, HPR = 16

Ω).

* Valid for Audio interface input (Audio Mode).

**Calculation of TSF and SUT: we define:

k=(fAMCK

⁄ fDIV) where fAMCK is the frequency of AMCK expressed in Hz and

fDIV = 6144000·(AMCK_DIV+2), where AMCK_DIV is the content of CR18, bits1-0. The approximate startup time is obtained dividing 10.6

ms by

k, and the transient suppression filter cutoff frequency is obtained multiplying 20Hz for k

Note: Fs range: 8kHz - 48kHz.

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

Resolution*

Bits

DYNR

Dynamic Range

A-weighted

SNR

Signal to noise ratio

2Vpp output

HPL, HPR gain set to -6dB

Ωload

A-weighted

unweighted (20 Hz to 20 kHz)

THDL

Total Harmonic Distortion

Worst case load

2Vpp output

HPL, HPR gain set to -6dB

Ωload

0.01

0.03

THD

Total Harmonic Distortion

2Vpp output

HPL, HPR gain set to -6dB

Ωload

0.004

Deviation from Linear Phase*

Measurement Bandwidth 20Hz to

20kHz, Fs= 48kHz.

Combined digital and analog filter

characteristics.

1Deg

fPB

Passband*

Combined Digital and Analog filter

characteristics.

00.45Fs

kHz

Passband Ripple*

Combined Digital and Analog filter

characteristics.

0.2

fSB

StopBand*

Combined Digital and Analog filter

characteristics.

0.55Fs

kHz

StopBand Attenuationv

Measurement Bandwidth up to

3.45Fs

Combined Digital and Analog filter

characteristics.

TSF

Transient suppression filter cutoff

frequency**

Out Of Band Noise

Measurement Bandwidth 20kHz

to 100kHz. Zero input signal

-90

dBr

tgd

Group Delay*

0.4

Interchannel Isolation*

2Vpp output

HPR, HPL unloaded

HPR, HPL with 16

Ω to VCMHP

100

Interchannel Gain Mismatch

0.2

Gain Error

0.5

SUT

Startup Time from Power Up**

9.3

13.8

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