AFE1230

3

SBWS015A

AFE1230E

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

RECEIVE CHANNEL

Number of Inputs

Differential

2

Input Voltage Range

±3.1

V

Common-Mode Voltage

V

A/D Converter Code

∆Σ A/D Converter

16

Bits

Programmable Gain Range

3dB Steps

0

+21

dB

Gain Absolute Accuracy

%

Gain Step Accuracy

3dB Steps, Accuracy Relative to Gain = 1

±0.5

dB

Settling Time for Gain Change

6

Symbol Periods

Output Data Coding

Binary Two's Complement

16

Bits

MCLK

Master Clock

1.28

40.8

MHz

System Bit Rate

80k

2.55M

bps

Symbol Rate

Three Bits/Symbol

26.7

850

kHz

Output Word Rate (OWR)

53.4

1700

kHz

Programmable 5th-Order LPF,

0.25

0.5

OWR

0.25x and 0.5x OWR

TRANSMIT CHANNEL

D/A Converter Code

∆Σ D/A Converter

16

Bits

Internal Line Driver, PAR = 3,

14.5

dBm

Provides 14.5dBm at 135

Ω Line

with 1:3.7 Transformer

Internal Line Buffer, PAR = 4,

10

dBm

Load is External Driver OPA2677

Output Voltage

Balanced Differential

±3.1

V

V

Output Resistance

DC to 1MHz

0.2

Ω

Input Data Coding

Binary Two's Complement

16

Bits

MCLK

Master Clock

1.28

40.8

MHz

System Bit Rate

Three Bits/Symbol

80k

2.55M

bps

Input Symbol Rate

Three Bits/Symbol

26.7

850

kHz

Input Word Rate (IWR)

Two Words/Symbol Period

53.4

1700

kHz

5th or 7th LPF, 0.25x, 0.38x, 0.5x IWR

0.25

0.5

IWR

TRASNSCEIVER PERFORMANCE

rxGAIN = 12dB

–80

dB

DIGITAL INTERFACE

Logic Levels:

V

–0.3

+0.8

V

V

+0.4

V

POWER

Analog Power-Supply Voltage

Specification

5

V

Analog Power-Supply Voltage

Operating Range

4.75

5.25

V

Digital Power-Supply Voltage

Specification

3.3

V

Digital Power-Supply Voltage

Operating Range

3.15

5.25

V

750

mW

14.5dBm at 135

Ω Line, E1

560

mW

PSRR

60

dB

TEMPERATURE RANGE

–40

+85

°C

ELECTRICAL CHARACTERISTICS

All specifications are typical at 25

°C, AV

NOTES: (1) With a balanced differential signal, the positive input is 180

° out-of-phase with the negative input, therefore, the actual voltage swing about the common-

mode voltage on each pin is

±1.55V to achieve a total input range of ±3.1V or 6.2Vp-p. (2) The A/D converter oversamples the receive signal and outputs data words

at twice the symbol rate; the A/D converter conversion rate is called the Output Word Rate (OWR). (3) The digital low-pass filter that is part of the A/D converter can

be programmed by the user for a 3dB frequency of 1/2 of the OWR or 1/4 of the OWR. (4) The internal line driver is designed for G.SHDSL. (5) An external driver

(OPA2677) should be used for HDSL2 application. (6) The cutoff frequencies are user programmable. (7) Uncancelled echo is the sum of all noise and distortion

errors for both the transmit and receive channels. (8) For a random sequence of the symbol, using an internal driver providing 14.5dBm power to the line for G.SHDSL.

(9) For a random sequence while driving an external line driver (OPA2677) for HDSL2. (10) Functionality only guaranteed over temperature range.