SLAC Products

11

Transmission Characteristics

The gain of the receive path is defined to be 0 dB when a 0 dBm0, 1014 Hz PCM sine wave input results in a nominal

1.55 Vrms for µ-law or 1.56 Vrms for A-law analog output. The gain of the transmit path is 0 dB when a 1.55 Vrms

for µ-law or 1.56 Vrms for A-law, 1014 Hz sine wave analog input results in a level of 0 dBm0 at the digital output.

When relative levels (dBm0) are used in any of the following transmission specifications, the specification holds for any

setting of the AX + GX gain from 0 to 12 dB and the AR + GR loss from 0 to 12 dB. Performance specification for

settings of the AX + GX gain from 12 to 18 dB and the AR + GR loss from 12 to 18 dB is determined as the device

is characterized.

Notes:

1. AMD guarantees less than 0.1% of units fall into the last 0.05 dB of these specification numbers.

2. See Figure 1.

3. With f swept between 0 to 300 Hz and 3400 to 12 kHz, any generated output signals other than f are less than –28 dBm0.

This specification is valid for either transmission path.

4. AMD guarantees < 0.2% of units are above –46 dB. This relaxed specification applies to only the third harmonic.

5. Intermodulation distortion specification for two signals of same level in the range of –4 dBm0 to –21 dBm0 does not produce

2

to 3400 Hz at –9 dBm0.

6. No single frequency component in the range above 3800 Hz may exceed a level of –55 dBm0.

7. The Group Delay specification is defined as the sum of the minimum values of the group delays for the transmit and the

receive paths when the transmit and receive time slots are identical and the B, X, R, and Z filters are disabled. For PCLK

frequencies between 1.03 MHz and 1.53 MHz, the group delay may vary from one cycle to the next. See Figure 2.

Description

Test Conditions

Min

Typ

Max

Unit

Note

Gain accuracy

D to A or A to D

0 dBm0, 1014 Hz

25°C to 85°C

0 dB < |path gain| < 6 dB

0°C

–40°C

–0.20

–0.25

–0.35

+0.20

+0.25

+0.35

dB

Gain accuracy

D to A or A to D

0 dBm0, 1014 Hz

70°C to 85°C

6 dB < |path gain| < 12 dB

25°C

0°C

–40°C

–0.20

–0.25

–0.30

–0.35

+0.20

+0.25

+0.30

+0.35

—

1

1

—

Gain accuracy

analog to analog

or digital to digital

25°C to 85°C

0°C

–40°C

–0.20

–0.25

–0.35

+0.20

+0.25

+0.35

Attenuation distortion

300 Hz to 3400 Hz

–0.125

+0.125

2

Single frequency distortion, A to D

–46

3

Single frequency distortion, D to A –6 dB < (GR + AR) < 0 dB

–40°C to 85°C

–12 dB < (GR + AR) < –6 dB

70°C to 85°C

–12 dB < (GR + AR) < –6 dB

25°C

–12 dB < (GR + AR) < –6 dB

0°C

–12 dB < (GR + AR) < –6 dB

–40°C

–46

–46

–45

–43

–40

3

3

3, 4

3, 4

3, 4

Intermodulation distortion

–42

–56

dBr

5

Analog out

Idle channel noise

Digital out

digital looped back

weighted

unweighted

digital input = 0

A-law

µ-law

A-law

µ-law

–68

–55

–78

12

–68

19

dBm0p

dBm0p

dBm0p

dBrnc0

dBm0p

dBrnc0

6

Crosstalk

TX to RX

same channel

RX to TX

0 dBm0

300 Hz to 3400 Hz

–75

–75

TX to TX

Crosstalk

TX to RX

between channels

RX to TX

RX to RX

0 dBm0

300 Hz to 3400 Hz

–76

–78

–76

–78

Group delay

PCLK

≥ 1.53 MHz

PCLK

≤ 1.03 MHz

B, X, R, and Z filters disabled

630

695

µs

7