PIN DESCRIPTIONS
PIN #
TYPE
NAME
DESCRIPTION
1
2
3
No Connection
No Connection
Power
NC
NC
DVDD
Digital Supply (+3.3 to +5V)
Digital Ground
Transmit Baud Clock (584kHz for E1)
Transmit Clock at 48x baud clock (28.032MHz for E1)
Input Data Word
Receive baud clock (584kHz for E1)
Receive clock at 48x baud clock (28.032MHz for E1)
Output Data Word
Digital Supply (+3.3 to +5V)
Digital Ground
4
5
6
7
8
9
Ground
Input
Input
Input
Input
Input
Output
Power
Ground
Power
Input
DGND
txbaudCLK
tx48xCLK
Data In
rxbaudCLK
rx48xCLK
Data Out
DVDD
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
DGND
AVDD
Analog Supply (+5V)
rxHYB–
rxHYB+
rxLINE–
rxLINE+
AGND
vrREFP
VCM
vrREFN
AVDD
AGND
txLINE–
AVDD
txLINE+
AGND
NC
Negative input from hybrid network
Positive input from hybrid network
Negative line input
Positive line input
Analog Ground
Positive reference output
Common-mode voltage (buffered)
Negative reference output
Analog Supply (+5V)
Analog Ground
Negative line output
Input
Input
Input
Ground
Output
Output
Output
Power
Ground
Output
Power
Output buffer supply (+5V)
Positive line output
Output buffer ground
Output
Ground
No Connection
BLOCK DIAGRAM
txLINE+
txLINE–
Pulse
Former
Filter
Output
Buffer
REFP
VCM
txbaudCLK
tx48xCLK
Data In
Voltage
Reference
Transmit
Control
REFN
rxbaudCLK
rx48xCLK
Data Out
Receive
Control
rxLINE+
rxLINE–
rxHYB+
rxHYB–
∆Σ
Modulator
Decimation
Filter
®
AFE1124
4
BB [ BURR-BROWN CORPORATION ]
