參數(shù)資料
型號: STLC1511
廠商: 意法半導體
英文描述: NorthenLite⑩ G.lite BiCMOS Analog Front-End Circuit
中文描述: NorthenLite⑩G.lite的BiCMOS模擬前端電路
文件頁數(shù): 1/31頁
文件大?。?/td> 358K
代理商: STLC1511
1/31
STLC1511
November 2000
This is preliminary information on a new product now in development. Details are subject to change without notice.
I
Wide transmit (~80dB) and receive (~69dB)
dynamic range to limit the external filtering
requirements for extended loop reach operation
I
Programmable tx gain: 0 ÷ -32dB in 2dB steps
I
14-bit D/A converter in transmit path
I
Programmable rx gain: 0 ÷40dB in 0.5dB steps
I
12-bit A/D converter in receive path
I
Integrated phase-locked loop with an externall
LC or crystal oscillator
I
Low power: 300mW @ 5.0V
I
64-pin TQFP package
1.0 GENERAL DESCRIPTION
The STLC1511 G.lite Analog Front End (AFE) chip
implements the analog transceiver functions required
in both a central office modem and a customer
premise modem. It connects the digital modem chip
with the loop driver and hybrid balance circuits. The
STLC1511 has been designed with excellent dynam-
ic range in order to greatly reduce the external filter-
ing requirements at the front end. The AFE chip and
its companion digital chip along with a loop driver, im-
plement the complete G.992.2 DMT modem solution.
The STLC1511 transmit path consists of a 14-bit
Nyquist rate D/A converter, followed by a program-
mable gain amplifier (TxPGA). The transmit gain is
programmable from 0 to -32dB in 2dB steps.
The STLC1511 receive path contains a buffer ampli-
fier followed by a programmable gain amplifier (RxP-
GA), a low pass anti-aliasing filter, and a 12-bit
Nyquist rate A/D converter. The RxPGA is digitally
programmable from 0 to 40dB in 0.5dB steps.
2.0 PACKAGING AND PIN INFORMATION
2.1 STLC1511 Pin Allocation
The pinout for the STLC1511 is depicted in Figure 1.
TQFP64
ORDERING NUMBER: STLC1511
PRODUCT PREVIEW
NorthenLite G.lite BiCMOS
Analog Front-End Circuit
Figure 1. STLC1511 pinout
1
2
3
5
6
4
7
8
9
10
27
11
12
28 29 30 31 32
59 58 57 56
54
55
53 52 51 50 49
43
42
41
39
38
40
48
47
46
44
45
VSSDIGE1
RXSOUT[1]
RXSOUT[0]
CK35M
VDDDIG1
DIGREF
DIGCLK
DTX
VDDDIG2
VSSDIG2
VDDDIGE1
R
R
R
R
R
R
R
R
V
V
Q
Q
T
V
V
V
V
V
V
T
T
Q
VCCPLL
VEEPLL
FREQ
OSCNB
OSCPB
OSCNE
QVEEBIAS
VEEBIAS
VCCBIAS
V3P75V
IREF50m
TQFP64
22 23 24 25 26
60
R
61
T
62
T
63
F
64
V
A
A
A
V
V
17 18 19 20 21
37
36
34
33
35
OSCPE
VCAP
VSSPLL
QVEEPLL
VDDPLL
13
14
15
16
QVEEADC
VCCADC
VEEADC
ENB
DRX
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