UCB1510DB Просмотр технического описания (PDF) - Philips Electronics

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UCB1510DB

AC97 digital modem codec

Philips Electronics 

Philips Semiconductors

UCB1510

AC97 digital modem codec

Table 33: Dynamic characteristics…continued

VSSD = VSSA = 0 V; VDDD = VDDA = 3.3 V ±10%; Tamb = 25 °C; VI(ref) = 1.2 V; fBIT_CLK = 12.288 MHz; unless otherwise

specified.

Symbol Parameter

Conditions

Min

Typ

Max

Unit

On-chip reference circuit

Vi(ref)

reference voltage applied to

VREFBYP

1.0

1.2

1.4

V

tSTRTU

start-up time of internal

reference voltage circuit

−

−

1000

ns

Xtal oscillator

fxtal

Operating frequency

Zxtal

start-up time of internal

reference voltage circuit

12.288

10

MHz

kΩ

AClink control register data transfer

facclk

CLK input frequency

Dacclk

CLK duty factor

Reset circuit

0

12.288

MHz

−

50

−

%

tW(NRESET) RESET pulse width

tW(rst)

internal reset pulse width

5

−

−

ns

32 tCLK −

ns

[1] Additional test conditions: Fsample = 8 kHz; input signal 1 kHz, 300 mV (RMS); Line1_ADC_ON = 1; TEL_VOICE_ENA = 0,

input gain +6 dB

[2] Additional test conditions: Fsampling 8 kHz; 0 dB output attenuation; 90% of digital full scale input voltage; 1200 Ω load.

[3] See Figure 10.

[4] See Figure 11.

[5] Deviation of the analog output from 0, with 0 code input to telecom output path.

[6] All curves repeat around the sample frequency fsa or fst for telecom codec.

0dB

SBRvti

PBRR

Voice filter enabled

f plt = 0.0016 × f st

f pht = 0.42 × f st

f sht = 0.6 × f st

f vlt = 0.018 × f st

f vht = 0.05 × f st

SBRsht

Fplt Fvlt Fvht

Fig 10. Telecom input frequency response

Fpht

Fsht

9397 750 06856

Preliminary specification

Rev. 01 — 4 February 2000

© Philips Electronics N.V. 2000. All rights reserved.

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