AM79C30AVC datasheet(70/101 Pages) AMD

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Am79C30A/32A Data Sheet

MAP Transmission Characteristics

(Am79C30A only)

The codec is designed to meet CCIIT Recommenda-

tion G.714 requirements for signal to distortion, gain

tracking, frequency response, and idle channel noise

specification as defined in Table 53. Verification of con-

formance to G.714 is by device characterization. Pro-

duction testing of individual par ts includes those

parameters shown in Table 54.

Half-channel parameters are specified from AINA or

AINB input pins to a B channel for the transmit path,

and from a B channel to EAR1/EAR2 or LS1/LS2 pins

measured differentially for the receive path. These pa-

rameters are applicable for both A- or µ-law conversion.

(A-law assumes psophometric filtering, and µ-law as-

sumes c-message weighting). All parameters are spec-

ified with the GR, X, R, GX and GER filters disabled;

STG filter is enabled but programmed for infinite atten-

uation.

All values are for Vcc=5V +5%, TA = 0–70°C, and pro-

grammable filters/gains disabled (0 dB, flat) unless oth-

erwise indicated.

Table 53.

MAP Transmission Characteristics (Am79C30A only)

Parameter

Symbol

Parameter Descriptions

Test Conditions

Preliminary

Unit

Min

Typ

Max

TXF

Transmit Frequency Response (Attenuation vs.

Frequency Relative to –10 dBm0 at 1020 Hz)—see

Figure 17

*50 Hz–60 Hz

< 300 Hz

0.3 kHz–3.0 kHz

3.0 kHz–3.4 kHz

3.4 kHz–3.6 kHz

3.6 kHz–3.9 kHz

3.9 kHz–4.0 kHz

24.0

–0.25

0.0

9.0

+0.25

+0.9

RXF

Receive Frequency Response (Attentuation vs.

Frequency Relative to –10 dBm0 at 1020 Hz)—see

Figure 21

<300 Hz

0.3 kHz–3.0 kHz

3.0 kHz–3.4 kHz

3.4 kHz–3.6 kHz

3.6 kHz–3.9 kHz

3.9 kHz–4.0 kHz

–0.25

0.0

9.0

+0.25

+0.9

TXD

Transmit Group Delay Variation vs. Frequency at

–10 dBm0 Relative to Minimum Delay Frequency—

see Figure 18

500 Hz–600 Hz

600 Hz–1000 Hz

1.0 kHz–2.6 kHz

2.6 kHz–2.8 kHz

750

380

130

750

µs

RXD

Receive Group Delay Variation vs. Frequency at

–10 dBm0 Relative to Minimum Delay Frequency—

see Figure 22

500 Hz–600 Hz

600 Hz–1000 Hz

1.0 kHz–2.6 kHz

2.6 kHz–2.8 kHz

750

380

130

750

µs

TXSTD

Transmit Signal/Total Distortion vs. Level; CCITT

Method 2, 1020 Hz (Transmit Gain = 0dB)—See

Figure 20

0 to –30 dBm0

–40 dBm0

–45 dBm0

35.0

29.0

24.0

RXSTD

Receive Signal/Total Distortion vs. Level; CCITT

Method 2, 1020 Hz (Transmit Gain = 0dB)—See

Figure 24

0 to –30 dBm0

–40 dBm0

–45 dBm0

35.0

29.0

24.0

TXGT

Transmit Gain Tracking vs. Level; CCITT Method 2,

1020 Hz (Transmit Gain = 0 dB)—See Figure 19

+3 to –40 dBm0

–40 to –50 dBm0

–50 to –55 dBm0

–0.3

–0.6

–1.6

+0.3

+0.6

+1.6

RXGT

Receive Gain Tracking vs. Level; CCITT Method 2,

1020 Hz (Receive Gain = 0 dB)—See Figure 23

+3 to –40 dBm0

–40 to –50 dBm0

–50 to –55 dBm0

–0.3

–0.6

–1.6

+0.3

+0.6

+1.6

TXICN

Transmit Idle channel Noize AINA or AINB

Connected to AREF

GX = 0 dB, GA = 0 dB

GX = 6 dB, GA = 0 dB

GX = 6 dB, GA = 6 dB

GX = 6 dB, GA = 12 dB

GX = 6 dB, GA = 18 dB

–82

–79

–76

–73

–70

–78

–75

–72

–69

–66

dBm0

RXICN

Receive Idle channel Noise

GR = 0 dB, GER = 0 dB

GR = –12 dB, GER = 0 dB

–90

–80

–85

–75

dBm0

Note:

*Measured with the high pass filter and auto-zero enabled in MMR2.

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