Document
INTEGRATED CIRCUITS
DATA SHEET
TEA1094; TEA1094A Hands free IC
Product specification Supersedes data of 1996 Mar 11 File under Integrated Circuits, IC03 1996 Jul 15
Philips Semiconductors
Product specification
Hands free IC
FEATURES • Low power consumption • Power-down function (TEA1094A only) • Microphone channel with: – externally adjustable gain – microphone mute function. • Loudspeaker channel with: – externally adjustable gain – dynamic limiter to prevent distortion – rail-to-rail output stage for single-ended load drive – logarithmic volume control via linear potentiometer – loudspeaker mute function. • Duplex controller consisting of: – signal envelope and noise envelope monitors for both channels with: externally adjustable sensitivity externally adjustable signal envelope time constant externally adjustable noise envelope time constant – decision logic with: externally adjustable switch-over timing externally adjustable idle mode timing externally adjustable dial tone detector in receive channel – voice switch control with: adjustable switching range constant sum of gain during switching constant sum of gain at different volume settings. ORDERING INFORMATION PACKAGE TYPE NUMBER NAME TEA1094 TEA1094A TEA1094T TEA1094AT TEA1094AM DIP28 DIP24 SO28 SO24 SSOP24 DESCRIPTION plastic dual in-line package; 28 leads (600 mil) plastic dual in-line package; 24 leads (600 mil) APPLICATIONS
TEA1094; TEA1094A
• Mains, battery or line-powered telephone sets with hands-free/listening-in functions • Cordless telephones • Answering machines • Fax machines. GENERAL DESCRIPTION The TEA1094 and TEA1094A are bipolar circuits intended for use in mains, battery or line-powered telephone sets, cordless telephones, answering machines and Fax machines. In conjunction with a member of the TEA106X, TEA111X families of transmission circuits, the devices offer a hands-free function. They incorporate a microphone amplifier, a loudspeaker amplifier and a duplex controller with signal and noise monitors on both channels.
VERSION SOT117-1 SOT101-1 SOT136-1 SOT137-1 SOT340-1
plastic small outline package; 28 leads; body width 7.5 mm plastic small outline package; 24 leads; body width 7.5 mm plastic shrink small outline package; 24 leads; body width 5.3 mm
1996 Jul 15
2
Philips Semiconductors
Product specification
Hands free IC
TEA1094; TEA1094A
QUICK REFERENCE DATA VBB = 5 V; VGND = 0 V; f = 1 kHz; Tamb = 25 °C; MUTET = LOW; PD = LOW (TEA1094A only); RL = 50 Ω; RVOL = 0 Ω; measured in test circuit of Fig.12; unless otherwise specified. SYMBOL VBB IBB Gvtx ∆Gvtxr Gvrx PARAMETER supply voltage current consumption from pin VBB voltage gain from pin MIC to pin MOUT in transmit mode voltage gain adjustment with RGAT voltage gain in receive mode; the difference between RIN1 and RIN2 to LSP voltage gain adjustment with RGAR output voltage (peak-to-peak value) VRIN = 150 mV (RMS); RGAR = 374 kΩ; RL = 33 Ω; VBB = 9.0 V; note 1 VRIN = 20 mV (RMS); RGAR = 66.5 kΩ; RL = 50 Ω VMIC = 1 mV (RMS); RGAT = 30.1 kΩ CONDITIONS − 13 −15.5 16 MIN. 3.3 − 3.1 15.5 − 18.5 TYP. MAX. 12.0 4.4 18 +15.5 21 UNIT V mA dB dB dB
∆Gvrxr VO(p-p)
−18.5 −
− 7.5
+14.5 −
dB V
SWRA ∆SWRA Tamb Note
switching range switching range adjustment with RSWR referenced to RSWR = 365 kΩ operating ambient temperature
− −40 −25
40 − −
− +12 +75
dB dB °C
1. Corresponds to 200 mW output power.
1996 Jul 15
3
Philips Semiconductors
Product specification
Hands free IC
BLOCK DIAGRAM
handbook, full pagewidth
TEA1094; TEA1094A
10 (7) (13)
VBB PD(1)
TEA1094 TEA1094A
MICROPHONE CHANNEL
GND
8 (6)
VBB
19 (15) MUTET CMIC 22 (18) MIC
GAT
21 (17) 20 (16) 18 (14)
RGAT
V
I
I
V
MOUT MICGND
to TEA106x
RMIC
IDT RTSEN CTSEN BUFF 28 (24) TSEN LOG
16 (12)
RIDT
DUPLEX CONTROLLER
Vref 14 (11) CSWT
SWT
27 (23) TENV CTENV 26 (22) CTNOI CRNOI BUFF
13 mV
ATTENUATOR TNOI STAB 13 (10) RSTAB
23 (19) RNOI VOICE SWITCH
LOGIC BUFF 24 (20) RENV CRENV 13 mV BUFF RRSEN CRSEN 25 (21) RSEN LOG Vdt
SWR
12 (9)
RSWR
RGAR
5 (4) 6 (5)
GAR VBB LSP V I I V
2 RIN1 RIN2
2 (2) 3 (3) 11 (8) RVOL from TEA106x
CLSP 1 (1) CDLC DLC/MUTER DYNAMIC LIMITER
VOLUME VOL CONTROL
LOUDSPEAKER CHANNEL
MGE436
The pin numbers given in parenthesis are for the TEA1094A. (1) TEA1094A only.
Fig.1 Block diagram.
1996 Jul 15
4
Philips Semiconductors
Product specification
Hands free IC
PINNING PINS SYMBOL TEA1094 DLC/MUTER RIN1 RIN2 n.c. GAR LSP n.c. GND n.c. VBB VOL SWR STAB SWT n.c. IDT PD n.c. MICGND MUTET MOUT GAT MIC RNOI RENV RSEN TNOI TENV TSEN 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 TEA1094A 1 2 3 − 4 5 − 6 − 7 8 9 10 11 − 12 13 − 14 15 16 17 18 19 20 21 22 23 24
TEA1094; TEA1094A
DESCRIPTION dynamic limiter timing adjustment; receiver channel mute input receiver amplifier input 1 receiver amplifier input 2 not connected receiver gain adjustment loudspeaker amplifier output not connected ground reference not connected supply voltage receiver.