AFE1115E Datasheet PDF - Burr-Brown Corporation
| Part Number | AFE1115E | |
| Description | HDSL/MDSL ANALOG FRONT END WITH VCXO | |
| Manufacturers | Burr-Brown Corporation | |
| Logo |  |
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®
AFE1115 ®
AFE1115
HDSL/MDSL ANALOG FRONT END WITH VCXO
FEATURES
q COMPLETE HDSL ANALOG INTERFACE
q E1, T1 AND MDSL OPERATION
q VCXO AND VCXO CONTROL CIRCUITRY
DESCRIPTION
Burr-Brown’s Analog Front End greatly reduces the
size and cost of an HDSL (High bit rate Digital
Subscriber Line) system by providing all of the active
analog circuitry needed to connect an HDSL digital
signal processor to an external compromise hybrid and
a HDSL line transformer. The transmit and receive
filter responses automatically change with clock fre-
quency—allowing the AFE1115 to operate over a
range of data rates from 196kbps to 1.168Mbps.
Functionally, this unit consists of a transmit and a
receive section with a VCXO (Voltage Controlled
q +5V ONLY (5V or 3.3V Digital)
q SCALEABLE DATA RATE
q 300mW POWER DISSIPATION
q 56-PIN SSOP
Crystal Oscillator) control DAC and VCXO circuitry.
The transmit section generates, filters, and buffers
outgoing 2B1Q data. The receive section filters and
digitizes the symbol data received on the telephone
line. Data to the VCXO and symbol data are sent to the
AFE1115 via two serial interfaces; the receive data is
available as a 14-bit parallel word. This IC operates on
a single 5V supply. The digital circuitry in the unit can
be connected to a supply from 3.3V to 5V. It is housed
in a small 56-pin SSOP package.
vcDATA
vcSCLK
vcLE
VCXO
DAC
Pulse
Former
Filter
Oscillator
Output
Buffer
vcDAC
VCXO Output
VCXO Input
VCXO Output Clock
txLINE+
txLINE–
PLLOUT
PLLIN
txDATA+
txSCLK
txCLK
rxSYNC
rxLOOP
rxGAIN
rxDATA
2
14
Transmit
Control
Receive
Control
Decimation
Filter
Voltage
Reference
REFP
VCM
REFN
Delta-Sigma
Modulator
rxLINE+
rxLINE–
rxHYB+
rxHYB–
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 • Twx: 910-952-1111
Internet: http://www.burr-brown.com/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
©1997 Burr-Brown Corporation
PDS-11384
AFPrEint1ed1in1U5.S.A. July, 1997
®
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TYPICAL PERFORMANCE CURVES
At Output of Pulse Transformer
The curves shown below are measured at the line output of the HDSL transformer. Typical at 25°C, AVDD = +5V, DVDD = +3.3V, unless otherwise specified.
–20
–40
–60
–80
–100
–120
1K
POWER SPECTRAL DENSITY LIMIT
–38dBm/Hz for T1
–40dBm/Hz for E1
–80dB/decade
T1
E1
196kHz
–118dBm/Hz
292kHz
for T1
–120dBm/Hz
for E1
10K 100K
Frequency (Hz)
1M
10M
CURVE 1. Upper Bound of Power Spectral Density Measured at Output of HDSL Transformer.
B = 1.07
C = 1.00
D = 0.93
0.4T 0.4T
NORMALIZED
LEVEL
QUATERNARY SYMBOLS
+3 +1 –1 –3
A 0.01
0.0264 0.0088 –0.0088 –0.0264
B 1.07
2.8248 0.9416 –0.9416 –2.8248
C 1.0D0 ON2'.T640D0 EL0E.88T00E T–A0.8B80L0 E–2.6400
UNTILDEKNO00..90W33 N 20IF..405759T22EE00P..8012L86E44 IS––00..L8012E8644AV––20I..N4057G5922 IT IN?
F –0.01 –0.0264 –0.0088 0.0088 0.0264
G –0.16 –0.4224 –0.1408 0.1408 0.4224
H –0.05 –0.1320 –0.0440 0.0440 0.1320
1.25T
A = 0.01
F = –0.01
–1.2T
–0.6T 0.5T
E = 0.03
G = –0.16
H = –0.05
14T
CURVE 2. Transmitted Pulse Template and Actual Performance as Measured at Transformer Output.
INPUT IMPEDANCE vs BIT RATE
200
A = 0.01
F = –0.01
50T
150
100
T1 = 784kbps,
45kΩ
E1 = 1168kbps,
30kΩ
50
0
100
300
CURVE 3. Input Impedance of rxLINE and rxHYB.
500 700 900
Bit Rate (kbps)
1100 1300
5
AFE1115
®
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for AFE1115E electronic component. |
| Information | Total 12 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ AFE1115E.PDF Datasheet ] | |
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Featured Datasheets
| Part Number | Description | MFRS |
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| AFE1115E | The function is HDSL/MDSL ANALOG FRONT END WITH VCXO. Burr-Brown Corporation | |
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