U4084B Datasheet, PDF (7/26 Pages) TEMIC Semiconductors – Low-Voltage, Voice-Switched Circuit for Hands-Free Operation

U4084B
Parameters
Test Conditions / Pins
Attenuator control
C_T voltage
Pin 14 – V_B
R mode, V_CI = V_B
Idle mode
T mode
C_T source current
C_T sink current
C_T slow idle current
C_T fast idle internal
resistance
R mode
T mode
VCI input current
Dial tone detector
threshold
Microphone amplifier V_MUTE < 0.8 V, G_VCL = 31 dB
Output offset
V_{MICO –} V_B,
Feedback R =
180
kW
Open loop gain
f < 100 Hz
Gain bandwidth
Output high voltage
Output low voltage
Input bias current (MIC)
Muting (D gain)
I_O = –1.0 mA, V_S = 5.0 V
I_O = +1.0 mA
f = 1.0 kHz, V_MUTE = 2.0 V
300 Hz < f < 10 kHz
MUTE input resistance
MUTE input high
V_{S =} V_MUTE = 6.5 V
MUTE input low
Distortion
300 Hz < f < 10 kHz
Level detectors and background-noise monitors
Transmit receive switching
threshold
Ratio of current
at RLI1 + RLI2 to 20 mA
at TLI1 + TLI2 to switch
from T to R
Source current
at RLO1, RLO2, TLO1,
TLO2
Sink current
at RLO1, RLO2, TLO1,
TLO2
CPR, CPT output
resistance
I_O = 1.2 mA
CPR, CPT leakage current
System distortion
R mode
From RI to RECO
T mode
From MIC to TO includes
T attenuator
Symbol
V_CT
I_CTR
I_CTT
I_CTS
R_FI
I_VCI
V_DT
MICO_vos
G_VOLM
GBW_M
V_MICOH
V_MICOL
I_BM
G
G
R_MUTE
V_MUTEH
V_MUTEL
THD_M
I_TH
I_LSO
I_LSK
R_CP
I_CPLK
d_R
d_T
Min.
–85.0
40.0
1.5
10.0
–50.0
70.0
3.7
–55.0
50.0
2.0
0.0
0.8
Typ.
240.0
0.0
–240.0
–60.0
60.0
0.0
2.0
–60.0
15.0
0.0
80.0
1.0
–40.0
–68.0
90.0
0.15
1.0
–2.0
4.0
150
–0.2
0.5
0.8
Max.
–40.0
85.0
3.6
20.0
+50.0
200.0
V_S
0.8
1.2
3.0
3.0
Unit
mV
mA
mA
mA
kW
nA
mV
mV
dB
MHz
V
mV
nA
dB
dB
kW
V
V
%
mA
mA
W
mA
%
%
TELEFUNKEN Semiconductors
7 (26)
Rev. A1, 31-Jan-97
Preliminary Information