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PDF UBA1706 Data sheet ( Hoja de datos )
| Número de pieza | UBA1706 | |
| Descripción | Cordless telephone line interface | |
| Fabricantes | NXP Semiconductors | |
| Logotipo |  |
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1. UBA1706 datasheet pinout  Hay una vista previa y un enlace de descarga de UBA1706 (archivo pdf) en la parte inferior de esta página. Total 28 Páginas | ||
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INTEGRATED CIRCUITS
DATA SHEET
UBA1706
Cordless telephone line interface
Objective specification
Supersedes data of 1999 Mar 08
File under Integrated Circuits, IC17
1999 Jun 04
1 page  
Philips Semiconductors
Cordless telephone line interface
Objective specification
UBA1706
PINNING
SYMBOL PIN
DESCRIPTION
LN 1 positive line terminal
REG
2 line voltage regulator decoupling
LVI 3 negative line voltage sense input
RGL
4 reference for current regulation mode
LCC
5 line current control output
CST
6 input for stability capacitor
RXO
7 receive amplifier output
AGC
8 automatic gain control/line loss
compensation adjustment
RXI 9 receiver amplifier input
EHI 10 electronic hook switch control input
DATA
11 serial bus data input
EN 12 programming serial bus enable input
CLK 13 serial bus clock input
TXI−
TXI+
14 inverted transmit amplifier input
15 non-inverted transmit amplifier input
n.c. 16 not connected
SWI2
17 NPN open-collector output 2
SWI1
18 NPN open-collector output 1
GND
19 ground reference
n.c. 20 not connected
VCC 21 supply voltage
n.c. 22 not connected
n.c. 23 not connected
SLPE
24 connection for slope resistor
handbook, halfpage
LN 1
24 SLPE
REG 2
23 n.c.
LVI 3
22 n.c.
RGL 4
LCC 5
21 VCC
20 n.c.
CST 6
RXO 7
19 GND
UBA1706
18 SW1
AGC 8
17 SW2
RXI 9
16 n.c.
EHI 10
15 TXI+
DATA 11
14 TXI-
EN 12
13 CLK
FCA031
Fig.2 Pin configuration.
1999 Jun 04
5
5 Page 
Philips Semiconductors
Cordless telephone line interface
Objective specification
UBA1706
Input EHI can also be used for pulse dialling or register
recall (timed loop break). During line breaks (the voltage at
pin EHI is LOW or open-circuit), the voltage regulator is
switched off and the capacitor at pin REG is internally
disconnected to prevent its discharge. As a result, the
voltage stabilizer will have negligible switch-on delay after
line interruptions. This minimizes the contribution of the IC
to the current waveform during pulse dialling or register
recall.
When the UBA1706 is in power-down mode (bit PD at
logic 1), transistor TPDARL is forced off whatever the
voltage applied at pin EHI.
The rail-to-rail output stage is designed to drive a 500 µA
peak current. The output impedance at pin RXO is
approximately 100 Ω.
The voltage gain from pin RXI to pin RXO is set at 37.9 dB.
This gain value compensates typically the attenuation of
the anti-sidetone network (see Fig.10). The output and the
input are biased at 2 × Vd ≅ 1.4 V.
AGC is provided on this amplifier for line loss
compensation. This amplifier can be muted by activating
the receive mute function (bit RXM at logic 1).
SET IMPEDANCE
In the audio frequency range, the dynamic impedance
between pins LN and GND (illustrated in Fig.8) is mainly
determined by the ZSET impedance. The impedance
introduced by the external TNSW transistor connected
between pins GND and LN− is negligible.
TRANSMIT AMPLIFIER (PINS TXI+ AND TXI−)
The UBA1706 has symmetrical transmit inputs TXI+ and
TXI−. The input impedance between pins TXI+ or TXI− and
GND is 21 kΩ. The voltage gain from pins TXI+ or TXI− to
pin LN is set at 11.6 dB with 600 Ω line load (Zline) and
619 Ω set impedance. The inputs are biased at
2 × Vd ≅ 1.4 V, with Vd representing the diode voltage.
AGC is provided on this amplifier for line loss
compensation.
RECEIVE AMPLIFIER (PINS RXI AND RXO; BIT RXM)
The receive amplifier (see Fig.9) has one input (RXI) and
one output (RXO). The input impedance between
pins RXI and GND is 21 kΩ.
handbook, halfpage LN
LEQ
RP
ZSET
619 Ω
Vref
SLPE
GND
RSLPE
10 Ω
REG
CREG
4.7 µF
MGL215
Leq = CREG × RSLPE × RP
RP = internal resistance = 35 kΩ.
Fig.8 Equivalent impedance between
pins LN and GND.
handbook, full pagewidth
RXI
2Vd
RXM
VI
from AGC
2Vd
IV
RXO
UBA1706
FCA035
Bit names are given in italics.
Fig.9 Receive amplifier.
1999 Jun 04
11
11 Page | ||
| Páginas | Total 28 Páginas | |
| PDF Descargar | [ Datasheet UBA1706.PDF ] | |
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