TEA1098 Philips Semiconductors, TEA1098 Datasheet - Page 27

• Manufacturer Part Number: TEA1098
• Description: Speech and handsfree IC
• Manufacturer: Philips Semiconductors

Philips Semiconductors
1999 Oct 14
Signal envelope detectors
I
I
Noise envelope detectors
I
I
D
V
TX
V
D
Signal recognition
Switch-over
I
I
I
source(ENV)
sink(ENV)
source(NOI)
sink(NOI)
source(SWT)
sink(SWT)
idle(SWT)
V
V
V
V
V
HFRX(th)(rms)
TXIN(th)(rms)
IAL TONE DETECTOR
ECISION LOGIC
Speech and handsfree IC
SYMBOL
det(RSEN)
ENV
NOI
Srx(th)
Stx(th)
LEVEL LIMITER
(
sensitivity detection on pin
RSEN; voltage change on pin
RENV when doubling the
current from RSEN
maximum current sourced from
pin TENV or RENV
maximum current sunk by pin
TENV or RENV
voltage difference between pins
RENV and TENV
maximum current sourced from
pin TNOI or RNOI
maximum current sunk by pin
TNOI or RNOI
voltage difference between pins
RNOI and TNOI
threshold level at pin HFRX
(RMS value)
threshold level at pin TXIN
(RMS value)
PINS
threshold voltage between pins
RENV and RNOI to switch-over
from receive to Idle mode
threshold voltage between pins
TENV and TNOI to switch-over
from transmit to Idle mode
current sourced from pin SWT
when switching to receive mode
current sunk by pin SWT when
switching to transmit mode
current sourced from pin SWT in
Idle mode
IDT
PARAMETER
AND
SWT)
I
when 10 A is sourced
from both RSEN and
TSEN; signal detectors
tracking; note 1
when 5 A is sourced from
both RSEN and TSEN;
noise detectors tracking;
note 1
R
R
V
V
RSEN
HFRX
TXIN
RSEN
TSEN
= 0.8 to 160 A
< V
27
CONDITIONS
< V
= 10 k
= 10 k
TXIN(th)
HFRX(th)
; note 2
; note 2
0.75
7.5
MIN.
1.25
12.5
18
120
1
25
0.75
13
13
10
0
1
3
120
3
10
TYP.
Product specification
1.25
12.5
0.75
7.5
TEA1098
MAX.
mV
mV
mV
mV
mV
mV
mV
UNIT
A
A
A
A
A
A
A