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UCB1510DB

AC97 digital modem codec

Philips Electronics 

Philips Semiconductors

UCB1510

AC97 digital modem codec

19. Dynamic characteristics

Table 33: Dynamic characteristics

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

Telecom input [1]

fst

Vi(rms)

sample frequency

input voltage (RMS value)

differentially applied to TINN

and TINP; ADC[3:2] = 1 (6 dB)

in register 0x46

−

8

−

kHz

330

370

410

mV

Vi(bias)

αi

DC bias voltage

input gain

input gain step size

TINN/TINP

2 LSBs ignored, Bit 3 step

1.2

−

0

6

4

6

1.6

V

18

dB

8

dB

Zi

input impedance

S/N

signal-to-noise ratio

25

−

−

kΩ

60

75

−

dB

THD

total harmonic distortion

−

−75

−60

dB

LE(d)(ADC) ADC differential linearity

error

−

−

2

LSB

RES

codec resolution

−

14

−

bit

PBRR

pass-band ripple rejection fplt < fsig < fpht; no voice filter [3], [6] −

−

1.2

dB

fvht < fsig < fpht; voice filter

[3], [6] −

−

1.2

dB

activated

SBRvti

SBRsht

Doffset

Ssup

stop-band rejection

digital offset

sidetone suppression

effectiveness

fsig < fvti; voice filter activated [3], [6] 30

−

fsht < fsig

[3], [6] 50

−

no signal applied to input

−

−

600 Ω line impedance;

1:1 transformer with 156 Ω

winding resistance

20

−

−

dB

−

dB

50

LSB

−

dB

Telecom output [2]

fst

Vo(rms)

sample frequency

output voltage (RMS value)

differentially measured

between TOUTP and TOUTN

−

8

1.35

−

−

kHz

1.85

V

Vo(bias)

DC bias voltage

TOUTP/TOUTN; telecom O/P

path enabled

1.2

−

1.6

V

RES

codec resolution

−

14

−

bit

S/N

signal-to-noise ratio

60

75

−

dB

THD

total harmonic distortion

−

−75

−

dB

PBRR

pass-band ripple rejection

[4], [6] −

−

1.2

dB

SBR

OBR(rms)

stop-band rejection

out-of-band rejection (RMS

value)

fsht < f < fst

f > fst

[4], [6] 50

−

−

−

−

dB

25

mV

Zo(load)

Eoffset

load impedance

offset error

600

−

[5]

−

−

−

Ω

100

mV

9397 750 06856

Preliminary specification

Rev. 01 — 4 February 2000

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

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