REV. M

Page 24

September 1998

AS3502

otherwise specified.

Symbol

Parameter

Conditions

Min.

Typ.*

Max.

Units

GXA

Absolute Transmit Gain

Trimming and Step Deviations

25 °C, Note 1, MIC1 Input

Steps: 16dB, 22dB, 28dB, 34dB, 40dB

±0.3

dB

GXAT

Gain Variation with Temp.

±0.1

dB

GXAV

Gain Variation with Supply

±0.05

dB

GXAG

Gain Variation with Digital Gain

0 dB

≤ DGX ≤ +6 dB

±0.05

dB

DGX

Digital Gain Setting Range

See text for coefficient calculation

0

+6

dB

GTX

Gain Variation with Input Level

1020 Hz tone ; AGX=40 dB; DGX=0 dB

-40 to +3 dBm0

-50 to -40 dBm0

-50 to -55 dBm0

±0.2

±0.4

±0.8

dB

dB

dB

GXAF

Transmit Frequency Response

Relative. to gain at 1020 Hz @ -10dBm0

50 Hz

60 Hz

100 Hz

200 Hz

300 to 3000 Hz

3400 Hz

3400 Hz to 4000 Hz

4000 Hz to 4600 Hz

-1.8

-0.2

-1.1

-30

-30

-22

-0.1

0.2

0

Note 2

Note 3

dB

dB

dB

dB

dB

dB

dB

dB

DIS

Discrimination against Out -of

Band Input Signals

4.6 kHz at--10 dBm0

8 kHz at -10 dBm0

35

45

dB

dB

PDX

Absolute Group Delay

0 dBm0 at 1500 Hz

600

µs

DDX

Group Delay Distortion

Relative to minimum

500 Hz

630 Hz

800 Hz

1000 Hz

1250 Hz

1600 Hz

2100 Hz

2500 Hz

190

100

50

20

0

0

10

50

µs

µs

µs

µs

µs

µs

µs

µs

STDX

Signal to Distortion Ratio

f = 1020 Hz , AGX=40 dB; DGX=0 dB;

Note 4

0dBm0

-10dBm0

-30dBm0

-40dBm0

-45 dBm0

50

50

40

31

26

dBp

dBp

dBp

dBp

dBp

ICNX

Idle Channel Noise

Inputs shorted; AGX=40 dB; DGX=0 dB

-70

dBm0p

SFNX

Single Frequency. Noise

0.3 -3.4 kHz 10 Hz bandwidth; AGX=40

dB; DGX=0 dB

-75

dBm0

PSRRX

Transmit

Power Supply Rejection Ratio

VDD + 100 mVrms 0 to 50 kHz

inputs shorted; measured on TXD

50

dBp

CT RX->TX

Receive to Transmit Crosstalk

75

dB

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

Note 1:

The tolerance of the absolute input level is defined by the trimming accuracy of the converter reference.

Note 2:

GXAF = 15 sin

π 4000 − f

(

)

1200

− 1









Note 3: GXAF = 20 sin

π 4000 − f

(

)

1200

−

15

20









Note 4:

Total distortion includes quantization and harmonic distortion;