PCF50732H datasheet(46/64 Pages) PHILIPS

46 / 64 page

1999 May 03

Philips Semiconductors

Objective speciﬁcation

Baseband and audio interface for GSM

PCF50732

18 FUNCTIONAL CHARACTERISTICS

18.1

Baseband transmit (BSI to TXI/Q)

VDDA = 2.5 to 2.75 V; Tamb = −40 to +85 °C.

Notes

1. Measured at full-scale; load: 10 pF // 10 k

Ω; f = 67 kHz.

2. Not tested. Defined between the rising edge of BIOCLK which latches a data bit at BDIO to its corresponding

maximum phase change on the analog outputs ITX and QTX.

3. Not tested.

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

RESTXIQ

resolution of TX DACs

−

bit

S/NTXIQ

signal-to-noise TX DACs

−

FSINTXIQ

input sampling frequency

−

270.833

−

kHz

VO(TXIQ)(p-p)

output signal amplitude (peak-to-peak

value)

note 1

0.9

1.0

1.1

VDC(TXIQ)

output DC level

1.15

1.25

1.35

AMATTXIQ

output amplitude matching between

I and Q TX paths

note 1

−1.75 −

+1.75

−0.15 −

+0.15

VOFSTXIQ

differential DC offset voltage between

IP/IN or QP/QN

note 1

−4.5

−

+4.5

FRESPTXIQ

frequency response of random output

signal

f = 0 to 100 kHz

−3

−−

f = 200 kHz

−−

−30

f = 250 kHz

−−

−33

f = 400 kHz

−−

−60

f = 600 kHz

−−

−70

f = 1200 kHz

−−

−70

f > 1800 kHz

−−

−70

MPEITXIQ

maximum phase effect instance

note 2

−

−µs

AGDTXIQ

absolute group delay

note 1

−

−µs

GDLTXIQ

group delay linearity

measured at full-scale;

10 kHz < f < 100 kHz;

load: 10 pF // 10 k

Ω

−

100

−

GDMATTXIQ

group delay matching of I and Q TX paths

−−

PMATTXIQ

phase matching of I and Q TX paths

note 1

−

0.5

−

deg

PTERMSTXIQ

RMS phase trajectory error

random input pattern;

notes 1 and 3

−

0.5

0.8

deg

PTEPEAKTXIQ peak phase trajectory error

−

1.5

3.0

deg

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