REV. M

Page 23

September 1998

AS3502

Note 1: This corresponds to a +3.14 dBm0 signal at the PCM output which is equal to a PCM overload level of ±4096;

≤VDD≤4.5 V; RL=150Ω from EP+ to EP-)

Symbol

Parameter

Conditions

Min.

Typ.*

Max.

Units

AOUTP

Peak Overload Level

Note 1

RL=150

Ω THD= 2% GR=0 dB

CL=60nF THD = 5% GR=+5 dB

1.12

2.8

Vrms

Vp

AOUT

Nominal Output Level

0 dBm0 PCM Code GR=-15 dB

137.7

mVrms

RL

Load Resistance

EP + to EP-

150

Ω

GREP

Earpiece GainRange

GR = AGR + DGR

-18

-15

+6

dB

AGREP

Analogue Gain Range

-12

+6

dB

Analogue Gain Step Size

5.8

6.0

6.2

dB

VOFF

Output Offset Voltage

±

100

mV

* Typical figures are at 25°C and are for design aid only; not guaranteed and not subject to production testing

Note 1: This corresponds to a +3.14dBm0 code at the PCM input which is equal to a PCM overload level of ±4096;

≤VDD≤4.5 V; RL=50Ω from SPK+ to SPK-)

Symbol

Parameter

Conditions

Min.

Typ.*

Max.

Units

AOUTP

Peak Overload Level

Note 1

RL=50

Ω THD= 5%, GRSPK= + 3dB

1570

mVrms

RL

Load Resistance

SPK+ to SPK

50

Ω

GRSPK

Speaker Receive Gain Range

GRSPK = AGRSPK + DGR

-3

0

+3

dB

AGRSPK

Speaker Analogue Gain

+3

dB

VOS

Output Offset Voltage

SPK+ to SPK-

±

100

mV

* Typical figures are at 25°C and are for design aid only; not guaranteed and not subject to production testing

Note 1: This corresponds to a +3.14dBm0 code at the PCM input which is equal to a PCM overload level of ±4096;

≤VDD≤4.5 V)

Symbol

Parameter

Conditions

Min.

Typ.*

Max.

Units

Vout

Max. Output Voltage Swing

TRO+ to TRO-

2 x VDD

Vpp

CL

Load Capacitance

TRO+ to TRO-

50

nF

TDR

Output Rise Time

CL = 50nF

100

µs

TDF

Output Fall Time

CL = 50nF

100

µs

* Typical figures are at 25°C and are for design aid only; not guaranteed and not subject to production testing

Note 1: See text for volume control

≤VDD≤4.5V)

Symbol

Parameter

Conditions

Min.

Typ.*

Max.

Units

VREF

Reference Voltage

IL = 1 mA; Note 1

2.0

2.2

2.4

V

PSRR

Power Supply RejectionRatio

300 Hz to 3 kHz, 100 mVrms Note 2

55

dB

Output Noise

300 Hz to 3.4kHz, Note 2

100

µ

V

* Typical figures are at 25°C and are for design aid only; not guaranteed and not subject to production testing

Note 1: VREF is turned off in power down mode

Note 2: VREF must be filtered by a suitable RC lowpass filter. A typical setup is using a 500

Ω microphone feeding

resistor and a 22 µF capacitor to ground.