Document
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
Philips Semiconductors
Objective specification
Cordless telephone 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 (CTR21) • Line current limitation for protection • Electronic hook switch control input • Transmit amplifier with: – Symmetrical inputs – Fixed gain – Large signal handling capability. • Receive amplifier with fixed gain • Transmit and receive amplifiers Automatic Gain Control (AGC) for line loss compensation. General purpose switches Two switches with open-collector. 3-wire serial bus interface Allows control of: • DC mask (voltage or current regulation) • Receive amplifier mute function • AGC: – On/off – Slope – Istart line current. • The state of the general purpose switches • Global power-down mode. Supply Operates with external supply voltage from 3.0 to 5.5 V. ORDERING INFORMATION TYPE NUMBER UBA1706TS PACKAGE NAME SSOP24 DESCRIPTION plastic shrink small outline package; 24 leads; body width 5.3 mm APPLICATIONS • Cordless base stations
UBA1706
• Mains or battery-powered telephone sets. GENERAL DESCRIPTION The UBA1706 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 also includes general purpose switches. Most of the characteristics are programmable via a 3-wire serial bus interface.
VERSION SOT340-1
1999 Jun 04
2
Philips Semiconductors
Objective specification
Cordless telephone line interface
UBA1706
QUICK REFERENCE DATA Iline = 15 mA; VCC = 3.3 V; RSLPE = 10 Ω; AGC pin connected to GND; Zline = 600 Ω; ZSET = 619 Ω; EHI = HIGH; f = 1 kHz; Tamb = 25 °C; bit AGC at logic 1, all other configuration bits at logic 0; measured in the test circuit of Fig.14; unless otherwise specified. SYMBOL VCC ICC Iline VLN RREGC PARAMETER supply voltage current consumption from pin VCC line current operating range DC line voltage DC mask slope in current regulation mode voltage gain transmit amplifier from TXI to LN ∆Gv(trx) gain control range for transmit and receive amplifiers with respect to Iline = 15 mA VTXI = 50 mV (RMS) Iline = 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 VRXI = 2 mV (RMS) Iline > 35 mA (typical); RLVI = 1 MΩ; RRGL = 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
Gv(trx)
1999 Jun 04
3
Philips Semiconductors
Objective specification
Cordless telephone line interface
BLOCK DIAGRAM
UBA1706
handbook, full pagewidth
VCC 21
UBA1706
19
GND
RX PREAMP RXI 9 V 2Vd EHI TXI+ TXI− 15 14 V I I
RXM
LINE INTERFACE
7 2Vd 1 LN ZSET RXO
LINE INTERFACE
300 mV 24 SLPE REG CREG RSLPE
TX PREAMP
RAGC2
RAGC1
2
AGC
8
AGC 2 EHI
LOW VOLTAGE PART
EHI
SAGC, AGC
CURRENT LIMITATION
VCC SLPE 10 5 EHI LCC CST CCST VCC TPDARL D
REG SWITCH DRIVER PROTECTION 600 mV
6
CRC
RRGL 200 nA RGL 4 3 LVI RLVI TNSW TNON-HOOK 16, 20, 22, 23
n.c.
GENERAL SWITCHES
2 9 SERIAL INTERFACE SUPPLY 18 17 SWI1 SWI2
SWC1, SWC2
PD
12 EN 13 CLK 11 DATA
MBL039
Bit names are given in italics.
Fig.1 Block diagram.
1999 Jun 04
4
Philips Semiconductors
Objective specification
Cordless telephone line interface
PINNING SYMBOL LN REG LVI RGL LCC CST RXO AGC RXI EHI DATA EN CLK TXI− TXI+ n.c. SWI2 SWI1 GND n.c. VCC n.c. n.c. SLPE 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 DESCRIPTION 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 inverted transmit amplifier input non-inverted transmit amplifier input not connected NPN open-collector output 2 NPN open-collector output 1 ground reference not connected supply voltage not connected not connected connection for slope resistor
AGC RXI 8 9 LVI RGL LCC CST RXO 3 4 5 6
handbook, halfpage
UBA1706
LN REG
1 2
24 SLPE 23 n.c. 22 n.c. 21 VCC 20 n.c. 19 GND
UBA1706
7 18 SW1 17 SW2 16 n.c. 15 TXI+ 14 TXI13 CLK
FCA031
EHI 10 DATA 11 EN 12
Fig.2 Pin configuration.
1999 Jun 04
5
Philips Semiconductors
Objective specification
Cordless telephone line interface
FUNCTIONAL DESCRIPTION All data given in this chapter consists of typical values, except when otherwise spe.