Datasheet

UNISONIC TECHNOLOGIES CO., LTD
TF212
JFET
CAPACITOR MICROPHONE
APPLICATIONS

DESCRIPTION
The UTC TF212 uses advanced trench technology to provide
excellent RDS (ON), low gate charge and operation with low gate
voltages. This device is suitable for use in capacitor microphone
applications.

FEATURES
* Suited for use in audio, telephone capacitor microphones.
* Good voltage characteristic.
* Good transient characteristic.

ORDERING INFORMATION
Ordering Number
TF212G-xx-A3C-R
TF212G-xx-AN3-R
TF212G-xx-AQ3-R
Note: Pin Assignment: S: Source
D: Drain

Package
SOT-113S
SOT-523
SOT-723
Pin Assignment
1
2
3
S
D
G
S
D
G
S
D
G
Packing
Tape Reel
Tape Reel
Tape Reel
G: Gate
MARKING
TF212-F4
TF212-F5
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QW-R206-097.D
TF212

JFET
ABSOLUTE MAXIMUM RATINGS ( TA=25°С, unless otherwise specified )
PARAMETER
Gate Drain Voltage
Gate Current
Drain Current
Power Dissipation
Junction Temperature
Storage Temperature
SYMBOL
VGDO
IG
ID
PD
TJ
TSTG
RATING
-20
10
1
100
150
-55 ~ +150
UNIT
V
mA
mA
mW
°С
°С
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.

ELECTRICAL CHARACTERISTICS (TA=25°С, unless otherwise specified)
PARAMETER
Gate Drain Breakdown Voltage
Gate Source Cut off Voltage
Drain Current
Forward Transfer Admittance
Input Capacitance
Output Capacitance
Voltage Gain
Reduced Voltage Characteristic
Frequency Characteristic
Input Resistance
Output Resistance
Total Harmonic distortion
Output Noise Voltage

SYMBOL
BVGDO
VGS(OFF)
IDSS
lYFSl
CISS
CRSS
GV
△GVV
△GVf
ZIN
ZO
THD
VNO
TEST CONDITIONS
IG=-100μA
VDS=5V, ID=1μA
VDS=5V, VGS=0
VDS=2V, VGS=0, f=1KHz
VDS=5V, VGS=0, f=1MHz
VDS=5V, VGS=0, f=1MHz
VIN=10mV, f=1KHz
VIN=10mV,f=1KHz, VCC=4.5V1.5V
f=1KHz to 110Hz
f=1KHz
f=1KHz
VIN=30mV, f=1KHz
VIN=0
MIN
-20
-0.2
140
1
25
TYP MAX UNIT
V
-0.6 -1.2
V
350
μA
1.2
mS
3.5
pF
0.65
pF
-3
dB
-1.2 -3.5
dB
-1
dB
MΩ
700
Ω
1
%
-110 dB
CLASSIFICATION OF IDSS
RANK
RANGE
F4
140-240
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
F5
210-350
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QW-R206-097.D
TF212

JFET
TEST CIRCUIT (TA=25°C)
VCC=4.5V
1KΩ
VCC=1.5V
33μF
15pF
+
OSC
VTVM
V
THD
B
A
1KΩ
FOR OUTPUT
IMPEDANCE
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R206-097.D
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