INTEGRATED CIRCUITS
DATA SHEET
UBA1707
Cordless telephone, answering
machine line interface
Product specification
Supersedes data of 1998 Jun 11
File under Integrated Circuits, IC03
1999 Feb 17
Philips Semiconductors
Product specification
Cordless telephone, answering machine
line interface
FEATURES
Line interface
•
Low DC line voltage; operates down to 1.2 V (excluding
polarity guard)
•
Voltage regulator with adjustable DC voltage
•
DC mask for voltage or current regulation (CTR 21)
•
Line current limitation for protection
•
Electronic hook switch control input
•
Transmit amplifier with:
– Symmetrical inputs
– Fixed gain
– Large signals handling capability.
•
Receive amplifier with fixed gain
•
Transmit and receive amplifiers AGC for line loss
compensation.
Auxiliary amplifier
•
Fixed gain.
Loudspeaker channel
•
Dual inputs
•
Rail-to-rail output stage for single-ended load drive
•
High output current capability
•
Dynamic limiter to prevent distortion
•
Digital volume control
•
Fixed maximum gain.
General purpose switches
•
Three switches with open-collector.
3-wires serial bus interface
Allows to control:
•
DC mask (voltage or current regulation)
•
Receive amplifier mute function
ORDERING INFORMATION
TYPE
NUMBER
UBA1707T
UBA1707TS
PACKAGE
NAME
SO28
SSOP28
DESCRIPTION
plastic small outline package; 28 leads; body width 7.5 mm
plastic shrink small outline package; 28 leads; body width 5.3 mm
•
AGC:
– On/off
– Slope
– I
start
line current.
•
Auxiliary amplifier mute function
•
Loudspeaker channel:
– Input selection
– Volume setting
– Dynamic limiter inhibition
– Power-down mode.
•
General purpose switches state
•
Global power-down mode.
Supply
UBA1707
Operates with external supply voltage from 3.0 to 5.5 V.
APPLICATIONS
•
Cordless base stations
•
Answering machines
•
Mains or battery-powered telephone sets.
GENERAL DESCRIPTION
The UBA1707 is a BiCMOS integrated circuit intended for
use in mains-powered telecom terminals. It performs all
speech and line interface functions, DC mask for voltage
or current regulation and electronic hook switch control.
The device includes an auxiliary amplifier, a loudspeaker
channel and general purpose switches.
Most of the characteristics are programmable via a 3-wire
serial bus interface.
VERSION
SOT136-1
SOT341-1
1999 Feb 17
2
Philips Semiconductors
Product specification
Cordless telephone, answering machine
line interface
UBA1707
QUICK REFERENCE DATA
I
line
= 15 mA; V
CC
= 3.3 V; R
SLPE
= 10
Ω;
AGC pin connected to GND; Z
line
= 600
Ω;
Z
SET
= 619
Ω;
EHI = HIGH;
f = 1 kHz; T
amb
= 25
°C;
bit AGC at logic 1, all other configuration bits at logic 0; measured in test circuit of Fig.17;
unless otherwise specified.
SYMBOL
V
CC
I
CC
I
line
V
LN
R
REGC
PARAMETER
operating voltage range
current consumption from pin V
CC
line current operating range
DC line voltage
DC mask slope in current regulation
mode
voltage gain
transmit amplifier from TXI to LN
∆G
v(trx)
gain control range for transmit and
receive amplifiers with respect to
I
line
= 15 mA
voltage gain from AXI to AXO
voltage gain from LSAI1 or LSAI2 to
LSAO for maximum volume
voltage gain adjustment range for
loudspeaker channel
voltage gain adjustment step for
loudspeaker channel
V
TXI
= 50 mV (RMS)
I
line
= 90 mA
10.6
36.9
−
11.6
37.9
6.5
12.6
38.9
−
dB
dB
dB
receive amplifier from RXI to RXO V
RXI
= 2 mV (RMS)
I
line
> 35 mA (typical);
R
LVI
= 1 MΩ; R
RGL
= 7.15 kΩ;
bit CRC = 1
normal operation; bit PD = 0
power-down mode; bit PD = 1
normal operation
with reduced performance
CONDITIONS
MIN.
3.0
−
−
11
3
2.7
−
TYP.
−
2.2
110
−
−
3.0
1.4
MAX.
5.5
3.2
150
140
11
3.3
−
UNIT
V
mA
µA
mA
mA
V
kΩ
G
v(trx)
G
v(AX)
G
v(LSA)
∆G
v(LSA)
∆G
v(LSA)s
V
AXI
= 2 mV (RMS)
V
LSAI
= 8 mV (RMS);
bits LSA1 = 1 and LSA2 = 1
bits (VOL0, VOL1, VOL2)
from (0, 0, 0) to (1, 1, 1)
VOL0 from 0 to 1
30.8
26.5
−
−
31.8
28
21
3
32.8
29.5
−
−
dB
dB
dB
dB
1999 Feb 17
3
Philips Semiconductors
Product specification
Cordless telephone, answering machine
line interface
BLOCK DIAGRAM
handbook, full pagewidth
UBA1707
VCC
25
UBA1707
LINE INTERFACE
22
GND
RXM
RXI
10
V
2Vd
EHI
TXI+
TXI−
18
17
V
I
I
2Vd
8
RXO
2
LN
ZSET
LN
+
300 mV
1 SLPE
RSLPE
RAGC2
RAGC1
3
REG
CREG
AGC
9
AGC
2
EHI
LOW VOLTAGE
PART
EHI
SAGC,
AGC
CURRENT
LIMITATION
SLPE
VCC
11
6
7
EHI
LCC
CST
CCST
VCC
TPDARL
D
REG
LN
−
600 mV
CRC
RRGL
200 nA
RGL 5
4
LVI
RLVI
TNSW
TNON-HOOK
AXM
AXI 15
AUXILIARY AMPLIFIER
16
2Vd
AXO
LSA1
LSAI1 26
V
2Vd
I
0.5VCC
LOUDSPEAKER CHANNEL
24
VCC
28
LSAO
DLC
CDLC
LSPD
LSAI2
27
2Vd
V
I
LSA2
LSPD
DYNAMIC LIMITER
DLCI
LSPD
VOLUME CONTROL
LSPGND
23
VOL0
TO
3
VOL2
GENERAL SWITCHES
3
19
SERIAL
INTERFACE
SUPPLY
21
20
SWI1
SWI2
SWI3
SWC1, SWC2,
SWC3
19
PD
13
EN
14
CLK
12
DATA
MGK705
Bit names are given in italics.
Fig.1 Block diagram.
1999 Feb 17
4
Philips Semiconductors
Product specification
Cordless telephone, answering machine
line interface
PINNING
SYMBOL
SLPE
LN
REG
LVI
RGL
LCC
CST
RXO
AGC
RXI
EHI
DATA
EN
CLK
AXI
AXO
TXI−
TXI+
SWI3
SWI2
SWI1
GND
LSPGND
LSAO
V
CC
LSAI1
LSAI2
DLC
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
DESCRIPTION
connection for slope resistor
positive line terminal
line voltage regulator decoupling
negative line voltage sense input
reference for current regulation mode
line current control output
input for stability capacitor
receive amplifier output
automatic gain control/line loss
compensation adjustment
receiver amplifier input
electronic hook switch control input
serial bus data input
programming serial bus enable input
serial bus clock input
auxiliary amplifier input
auxiliary amplifier output
inverted transmit amplifier input
non-inverted transmit amplifier input
NPN open-collector output 3
NPN open-collector output 2
NPN open-collector output 1
ground reference
ground reference for the loudspeaker
amplifier
loudspeaker amplifier output
supply voltage
loudspeaker amplifier input 1
loudspeaker amplifier input 2
dynamic limiter timing adjustment
CST 7
handbook, halfpage
UBA1707
SLPE 1
LN 2
REG 3
LVI 4
RGL 5
LCC 6
28 DLC
27 LSAI2
26 LSAI1
25 VCC
24 LSAO
23 LSPGND
22 GND
UBA1707
RXO 8
AGC 9
RXI 10
EHI 11
DATA 12
EN 13
CLK 14
MGK704
21 SWI1
20 SWI2
19 SWI3
18 TXI+
17 TXI−
16 AXO
15 AXI
Fig.2 Pin configuration.
1999 Feb 17
5
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