PCD6003 datasheet(79/96 Pages) PHILIPS

79 / 96 page

2001 Apr 17

Philips Semiconductors

Product speciﬁcation

Digital telephone answering machine chip

PCD6003

17.4

Analog supplies and general purpose ADC and DAC

Notes

1. VBGP output current is zero. Decoupling capacitance between VBGP and VSSA is 100 nF.

2. The VREF output current is zero however the VREF output buffer is loaded via VMIC (see note 3). Decoupling

capacitance between VREF and VSSA is between 1 and 100 µF, with a 100 nF capacitance in parallel. The output can

only source current (i.e. not sink).

3. Pin VMIC is connected to VREF via an internal switch. The VMIC switch is closed by setting SYMOD.4 = 1. The VMIC

DC output current is max. 400

µA, and VREF must be programmed to its typical value. For the connections of VMIC to

a microphone (see Fig.36). VMIC adjustment can only be done by adjusting VREF.

4. Output resistances represent the theoretical maximum which can be guaranteed by design. Actual output resistance

values can vary depending on several conditions as processing, temperature and drive signal shape.

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

VBGP

AVR bandgap voltage

note 1

1.15

1.23

1.30

VREF(RESET)

reference voltage, after reset

note 2

1.9

2.0

2.1

VREF(TUNED)

reference voltage when tuned via

VREFR

−

dVMIC

VREF − VMIC

note 3

−

VADIN,OFS

ADIN1 and ADIN2 input offset

voltage

−

VADIN1,2

ADIN1 and ADIN2 input voltage

range

−

VREF

RADIN1,2

ADIN1 and ADIN2 input

resistance

210

−

Ω

RDAOUT

DAOUT output resistance

note 4

−

Ω

VDAOUT

DAOUT output voltage range

−

VREF

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