U4084B Datasheet, PDF (6/26 Pages) TEMIC Semiconductors – Low-Voltage, Voice-Switched Circuit for Hands-Free Operation

U4084B
Electrical Characteristics
v T_amb = +25°C, V_S = 5.0 V, CD 0.8 V, unless otherwise specified
Parameters
Test Conditions / Pins
Symbol Min.
Typ.
Max.
Unit
Power supply
Supply current
CD input resistance
V_S = 6.5 V, CD = 0.8 V
V_S = 6.5 V, CD = 2.0 V
V_S = V_CD = 6.5 V
I_S
4.0
6.0
mA
600.0 800.0
mA
R_CD
50.0
90.0
kW
CD input voltage
– High
– Low
V_CDH
2.0
V_CDL
0.0
V_S
V
0.8
Output voltage
V_S = 3.5 V
V_B
1.3
V
V_S = 5.0 V
1.8
2.1
2.4
Output resistance
I_VB = 1.0 mA
R_OVB
400.0
W
Power supply rejection
C_VB = 220 mF, f = 1.0 kHz
PSRR
54.0
dB
ratio
Attenuators
Receive attenuator gain
Gain change
AGC gain change
Idle mode
Range R to T mode
Volume control range
RECO DC voltage
RECO DC voltage
f = 1.0 kHz, V_CI = V_B
dB
R mode, RI = 150 mV_rms
G_R
4.0
6.0
8.0
(V_S = 5.0 V)
R mode, RI = 150 mV_rms
(V_S = 3.5 V)
V_S = 3.5 V vs. V_S = 5.0 V
DG_R1
–0.5
0.0
+0.5
–V_S = 2.8 V vs. V_S = 5.0 V DG_R2
–25.0 –15.0
RI = 150 mV_rms
G_RI
–22.0 –20.0 –17.0
dB
DG_R3
49.0
52.0
54.0
R mode, 0.3 V_B < V_CI < V_B V_CR
27.0
35.0
dB
R mode
R to T mode
V_RECO
DV_RECO
" " ^VB
10
150.0
V
mV
RECO high voltage
I_O = 1.0 mA
V_RECOH
3.7
V
RI = V_B + 1.5 V
RECO low voltage
RI input resistance
I_O = 1.0 mA
V_RECOL
–1.5
–1.0
V
RI = V_B –1.0 V,
output measured w.r.t. V_B
RI < 350 mV_rms
R_RI
7.0
10.0
14.0
kW
Transmit attenuator gain f = 1.0 kHz
T mode, TI = 150 mV_rms
G_T
4.0
6.0
8.0
Idle mode, TI = 150 mV_rms
G_TI
–22.0 –20.0 –17.0
dB
Range T to R mode
G_TI
49.0
52.0
54.0
TO DC voltage
TO DC voltage
T mode
T to R mode
V_TO
V_TO
" " ^VB
100
150.0
V
mV
TO high voltage
TO low voltage
TI input resistance
Gain tracking
I_O = –1.0 mA
TI = V_B + 1.5 V
V_TOH
3.7
V
I_O = +1.0 mA
V_TOL
–1.5
–1.0
V
TI = V_B – 1.0 V,
output measured w.r.t. V_B
TI < 350 mV_rms
G_{R + G}T, @ T, Idle, R
R_TI
G_TR
7.0
10.0
14.0
"0.5
kW
dB
6 (26)
TELEFUNKEN Semiconductors
Preliminary Information
Rev. A1, 31-Jan-97