UTC K1109
N-CHANNEL JUNCTION FET
UTC
UNISONIC TECHNOLOGIES CO., LTD.
1
QW-R206-009,A
N-CHANNEL JFET FOR
ELECTRET CONDENSER
MICROPHONE
DESCRIPTION
The UTC K1109 is N-channel JFET for electret
condenser microphone.
FEATURES
*High gm implies low transfer loss
*Built-in gate-source diode and resistor implies fast
power on settling time
SOT-23
1
2
3
TOP VIEW
1: SOURCE 2: DRAIN 3: GATE
ABSOLUTE MAXIMUM RATINGS
(Operating temperature range applies unless otherwise specified)
PARAMETER SYMBOL
VALUE
UNIT
Drain-Source Voltage
V
DSX
20 V
Gate-Drain Voltage
V
GDO
-20 V
Drain Current
I
D
10
mA
Gate Current
I
G
10
mA
Total Power Dissipation
P
T
80
mW
Junction Temperature
T
j
125
C
Storage Temperature
T
STG
-55 ~ +125
C
ELECTRICAL CHARACTERISTICS
(Tj=25
C, unless otherwise specified)
PARAMETER SYMBOL
TEST
CONDITIONS
MIN
TYP
MAX
UNIT
Drain Current
I
DSS
V
DS
=5.0V,V
GS
=0 40
600
A
Gate Off Voltage
V
GS(OFF)
V
DS
=5.0V,I
D
=1.0
A -0.1
-1.0
V
Forward Transfer Admittance
lY
FS1
l V
DS
=5.0V,I
D
=30
A,f=1kHz 350
480
S
Forward Transfer Admittance
lY
FS2
l V
DS
=5.0V, V
GS
=0,f=1kHz 350
1600
S
Input Capacitance
Ciss
V
DS
=5.0V,V
GS
=0,f=1.0MHz 7.0
8.0
pF
Noise Voltage
NV
1.8
3.0
V
CLASSIFICATION OF I
DSS
RANK
J34 J35 J36
RANGE 90-180 150-300 200-450
UTC K1109
N-CHANNEL JUNCTION FET
UTC
UNISONIC TECHNOLOGIES CO., LTD.
2
QW-R206-009,A
NOISE VOLTAGE TEST CIRCUIT
1K
10pF
+4.5V
FILTER
NV r.m.s.
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