Burr Brown Corporation AFE1103E-1K, AFE1103 Datasheet

1

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AFE1103

AFE1103

®

AFE1103

International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: [phone] • Twx: 910-952-1111

Internet: http://www.burr-brown.com/ • FAXLine: [phone] (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: [phone] • Immediate Product Info: [phone]

©

1996 Burr-Brown Corporation PDS-1330A Printed in U.S.A. August, 1996

HDSL/MDSL ANALOG FRONT END

FEATURES

● COMPLETE ANALOG INTERFACE

● T1, E1, AND MDSL OPERATION

● CLOCK SCALEABLE SPEED

● SINGLE CHIP SOLUTION

● +5V ONLY (5V OR 3.3V DIGITAL)

● 250mW POWER DISSIPATION

● 48-PIN SSOP

● –40

°C TO +85°C OPERATION

● SECOND SOURCED BY BROOKTREE

Bt8921

DESCRIPTION

Burr-Brown’s Analog Front End greatly reduces the
size and cost of an HDSL or MDSL system by provid­ing all of the active analog circuitry needed to connect
the Brooktree Bt8952 HDSL digital signal processor
to an external compromise hybrid and a 1:2 HDSL line
transformer. All internal filter responses as well as the
pulse former output scale with clock frequency—
allowing the AFE1103 to operate over a range of bit
rates from 196kbps to 1.168Mbps.

Functionally, this unit is separated into a transmit and
a receive section. The transmit section generates, fil­ters, and buffers outgoing 2B1Q data. The receive
section filters and digitizes the symbol data received
on the telephone line and passes it to the Bt8952. The
HDSL Analog Interface is a monolithic device fabri­cated on 0.6µCMOS. It operates on a single +5V
supply. It is housed in a 48-pin SSOP package. This
unit is second sourced by Brooktree’s Bt8921.

Pulse

Former

PLL

OUT

PLL

IN

txDAT

P

txDAT

N

txCLK

rxSYNC

rxLOOP

rxGAIN

rxD13 - rxD0

Line

Driver

Voltage

Reference

Delta-Sigma

Modulator

Transmit

Control

Receive

Control

Decimation

Filter

14

2

txLINE

N

txLINE

P

REF

P

V

CM

REF

N

rxLINE

P

rxLINE

N

rxHYB

P

rxHYB

N

Patents Pending

2

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AFE1103

SPECIFICATIONS

Typical at 25°C, AVDD = +5V, DVDD = +3.3V, ftx = 584kHz (E1 rate), unless otherwise specified.

AFE1103E
PARAMETER COMMENTS MIN TYP MAX UNITS
RECEIVE CHANNEL

Number of Inputs Differential 2
Input Voltage Range Balanced Differential

(1)

±3.0 V
Common-Mode Voltage 1.5V CMV Recommended +1.5 V
Input Impedance All Inputs See Typical Performance Curves
Input Capacitance 10 pF
Input Gain Matching Line Input vs Hybrid Input ±2%
Resolution 14 Bits
Programmable Gain Four Gains: 0dB, 3.25dB, 6dB, and 9dB 0 9 dB
Settling Time for Gain Change 6 Symbol

Periods

Gain + Offset Error Tested at Each Gain Range 5 %FSR

(2)

Output Data Coding Offset Binary
Output Data Rate, rxSYNC

(3)

98 584 kHz

TRANSMIT CHANNEL

Transmit Symbol Rate, f

tx

98 584 kHz
T1 Transmit –3dB Point Bellcore TA-NWT-3017 Compliant 196 kHz
T1 Rate Power Spectral Density

(4)

See Typical Performance Curves
E1 Transmit –3dB Point ETSI RTR/TM-03036 Compliant 292 kHz
E1 Rate Power Spectral Density

(4)

See Typical Performance Curves
Transmit Power

(4, 5)

13 14 dBm
Pulse Output See Typical Performance Curves
Common-Mode Voltage, V

CM

AVDD/2 V

Output Resistance

(6)

DC to 1MHz 1 Ω

TRANSCEIVER PERFORMANCE

Uncancelled Echo

(7)

rxGAIN = 0dB, Loopback Enabled –67 dB

rxGAIN = 0dB, Loopback Disabled –67 dB

rxGAIN = 3.25dB, Loopback Disabled –69 dB

rxGAIN = 6dB, Loopback Disabled –71 dB
rxGAIN = 9dB, Loopback Disabled –73 dB

DIGITAL INTERFACE

(6)

Logic Levels

V

IH

|IIH| < 10µADV

DD

–1 DVDD +0.3 V

V

IL

|IIL| < 10µA –0.3 +0.8 V

V

OH

IOH = –20µADV

DD

–0.5 V

V

OL

IOL = 20µA +0.4 V

Transmit/Receive Channel Interface

t

tx1

txCLK Period 1.7 10.2 µs

t

tx2

txCLK Pulse Width t

tx1

/16 15t

tx1

/16 ns

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
Power Dissipation

(4, 5, 8)

DVDD = 3.3V 250 mW

Power Dissipation

(4, 5, 8)

DVDD = 5V 300 mW

PSRR 60 dB

TEMPERATURE RANGE

Operating

(6)

–40 +85 °C

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 ±1.5V to achieve a differential input range of ±3.0V or 6Vp-p. (2) FSR is Full-Scale Range. (3) The output data is available at twice the
symbol rate with interpolated values. (4) With a pseudo-random equiprobable sequence of HDSL pulses; 13.5dBm applied to the transformer (27dBm output from
txLINE

P

and txLINEN). (5) See the Discussion of Specifications section of this data sheet for more information. (6) Guaranteed by design and characterization. (7)
Uncancelled Echo is a measure of the total analog errors in the transmitter and receiver sections including the effect of non-linearity and noise. See the Discussion
of Specifications section of this data sheet for more information. (8) Power dissipation includes only the power dissipated within the component and does not include
power dissipated in the external loads. See the Discussion of Specifications section for more information.

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AFE1103

The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN
assumes no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject
to change without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not
authorize or warrant any BURR-BROWN product for use in life support devices and/or systems.

PIN DESCRIPTIONS

PIN # TYPE NAME DESCRIPTION

1 Ground PGND Analog Ground for PLL
2 Power PV

DD

Analog Supply (+5V) for PLL
3 Input txCLK Symbol Clock (QCLK from Bt8952) (392kHz for T1, 584kHz for E1)
4 Input txDAT

N

XMITB Line from Bt8952
5 Input txDAT

P

XMIT Line from Bt8952
6 Output rxD0 ADC Output Bit-0 (RCV 2 from Bt8952)
7 Output rxD1 ADC Output Bit-1 (RCV 3 from Bt8952)
8 Output rxD2 ADC Output Bit-2 (RCV 4 from Bt8952)
9 Output rxD3 ADC Output Bit-3 (RCV 5 from Bt8952)

10 Output rxD4 ADC Output Bit-4 (RCV 6 from Bt8952)
11 Output rxD5 ADC Output Bit-5 (RCV 7 from Bt8952)
12 Ground DGND Digital Ground
13 Power DV

DD

Digital Supply (+3.3V to +5V)

14 Output rxD6 ADC Output Bit-6 (RCV 8 from Bt8952)
15 Output rxD7 ADC Output Bit-7 (RCV 9 from Bt8952)
16 Output rxD8 ADC Output Bit-8 (RCV 10 from Bt8952)
17 Output rxD9 ADC Output Bit-9 (RCV 11 from Bt8952)
18 Output rxD10 ADC Output Bit-10 (RCV 12 from Bt8952)
19 Output rxD11 ADC Output Bit-11 (RCV 13 from Bt8952)
20 Output rxD12 ADC Output Bit-12 (RCV 14 from Bt8952)
21 Output rxD13 ADC Output Bit-13 (RCV 15 from Bt8952)
22 Ground DGND Digital Ground
23 Input rxSYNC ADC Sync Signal (RCVCLK from Bt8952) (392kHz for T1, 584kHz for E1)
24 Input rxGAIN0 Receive Gain Control Bit-0
25 Input rxGAIN1 Receive Gain Control Bit-1
26 Input rxLOOP Loopback Control Signal (loopback is enabled by positive signal)
27 Power AV

DD

Analog Supply (+5V)

28 Input rxHYB

N

Negative Input from Hybrid Network

29 Input rxHYB

P

Positive Input from Hybrid Network

30 Input rxLINE

N

Negative Line Input

31 Input rxLINE

P

Positive Line Input

32 Ground AGND Analog Ground
33 Ground AGND Analog Ground
34 Output REF

P

Positive Reference Output, Nominally 3.5V

35 Output V

CM

Common-Mode Voltage (buffered), Nominally 2.5V

36 Output REF

N

Negative Reference Output, Nominally 1.5V

37 Power AV

DD

Analog Supply (+5V)

38 Ground AGND Analog Ground
39 Output txLINE

N

Transmit Line Output Negative

40 Power AV

DD

Analog Supply (+5V)

41 Output txLINE

P

Transmit Line Output Positive

42 Ground AGND Analog Ground
43 NC NC Connection to Ground Recommended
44 NC NC Connection to Ground Recommended
45 NC NC Connection to Ground Recommended
46 NC NC Connection to Ground Recommended
47 Output PLL

OUT

PLL Filter Output

48 Input PLL

IN

PLL Filter Input