LESHAN RADIO COMPANY, LTD.
Low Noise Transistor
NPN Silicon
MMBT2484LT1
3 COLLECTOR 1 BASE 1 2
3
2 EMITTER
MAXIMUM RATINGS
Rating Collector–Emitter Voltage Collector–Base Voltage Emitter–Base Voltage Collector Current — Continuous Symbol V CEO V CBO V
EBO
CASE 318–08, STYLE 6
Value 60 60 6.0 50
Unit Vdc Vdc Vdc mAdc
SOT–23 (TO–236AB)
IC
THERMAL CHARACTERISTICS
Characteristic Total Device Dissipation FR– 5 Board, (1) TA = 25°C Derate above 25°C Thermal Resistance, Junction to Ambient Total Device Dissipation Alumina Substrate, (2) TA = 25°C Derate above 25°C Thermal Resistance, Junction to Ambient Junction and Storage Temperature Symbol PD Max 225 1.8 556 300 2.4 417 –55 to +150 Unit mW mW/°C °C/W mW mW/°C °C/W °C
RθJA PD
RθJA TJ , Tstg
DEVICE MARKING
MMBT2484LT1 = 1U
ELECTRICAL CHARACTERISTICS (TA = 25°C unless otherwise noted.)
Characteristic Symbol Min Max Unit
OFF CHARACTERISTICS
Collector–Emitter Breakdown Voltage (I C = 10 mAdc, I B = 0) Collector–Emitter Breakdown Voltage (I C = 10 µAdc, I E = 0) Emitter–Base Breakdown Voltage (I E = 10 µAdc, I C = 0) Collector Cutoff Current( V CB = 45Vdc, I E = 0) ( V CB = 45Vdc, I E = 0, T A=150 °C) Emitter Cutoff Current ( V EB =5.0 Vdc, I C = 0) 1. FR–5 = 1.0 x 0.75 x 0.062 in. 2. Alumina = 0.4 x 0.3 x 0.024 in. 99.5% alumina. I CBO I EBO — — — 10 10 10 nAdc µAdc nAdc V
(BR)EBO
V (BR)CEO V (BR)CBO
60 60 5.0
— — —
Vdc Vdc Vdc
O7–1/4
LESHAN RADIO COMPANY, LTD.
MMBT2484LT1
ELECTRICAL CHARACTERISTICS (T A = 25°C unless otherwise noted) (Continued)
Characteristic Symbol hFE 250 –– VCE(sat) –– V
BE(on)
Min
Max
Unit ––
ON CHARACTERISTICS
DC Current Gain (I C = 1.0 mAdc, V CE = 5.0 Vdc) (I C = 10 mAdc, V CE = 5.0Vdc) Collector–Emitter Saturation Voltage (I C = 1.0 mAdc, I B = 1.0 mAdc) Base–Emitter On Voltage (I C = 1.0 mAdc, I CE = 5.0 mAdc) –– 800 Vdc 0.35 Vdc –– 0.95
SMALL–SIGNAL CHARACTERISTICS
Output Capacitance (V CB = 5.0 Vdc, I E = 0, f = 1.0 MHz) Input Capacitance C obo –– –– –– 6.0 6.0 3.0 pF pF dB
C ibo (V EB=0.5 Vdc, I C = 0 , f = 1.0 MHz) Noise Finure NF (V CE=5.0 Vdc, I C = 10 µAdc , R S =10 kΩ, f = 1.0 MHz, BW =200 Hz)
RS in
en
IDEAL TRANSISTOR
Figure 1. Transistor Noise Model
O7–2/4
LESHAN RADIO COMPANY, LTD.
MMBT2484LT1
NOISE CHARACTERISTICS
(V CE = 5.0 Vdc, T A = 25°C) NOISE VOLTAGE
30 30
BANDWIDTH = 1.0 Hz
20 20
BANDWIDTH = 1.0 Hz
e n , NOISE VOLTAGE (nV)
10 7.0 5.0
3.0 mA 1.0 mA
e n , NOISE VOLTAGE (nV)
I C=10 mA
~ RS~ 0
RS ~ 0 ~
f = 10 Hz 100 Hz
7.0
10
1.0 kHz
5.0
10 kHz
300µA
3.0 10 20 50 100 200 500 1 k 2k 5 k 10 k 20 k 50 k 100 k
3.0 0.01 0.02 0.05 0.1 0.2 0.5 1.0 2.0
100 kHz
5.0 10
f, FREQUENCY (Hz)
I C , COLLECTOR CURRENT (mA)
Figure 2. Effects of Frequency
10 7.0 5.0 20
Figure 3. Effects of Collector Current
BANDWIDTH = 1.0 Hz
NF, NOISE FIGURE (dB)
I n , NOISE CURRENT (pA)
I C = 10 mA 3.0 mA 1.0 mA 300 µA 100 µA 10 µA
50 100 200 500 1 k 2k
16
3.0 2.0 1.0 0.7 0.5 0.3 0.2
BANDWIDTH = 10 Hz to 15.7 kHz
12
I C = 1.0 mA
8.0
500 mA 100 mA
4.0
10 mA
RS ~ 0 ~
0.1 10 20
30 µA
0 5 k 10 k 20 k 50 k 100 k 10 20 50 100 200 500 1 k 2k 5 k 10 k 20 k 50 k 100 k
f, FREQUENCY (Hz)
R S , SOURCE RESISTANCE (OHMS)
Figure 4. Noise Current
Figure 5. Wideband Noise Figure
100 Hz NOISE DATA
10 20
V T , TOTAL NOISE VOLTAGE (nV)
7.0 5.0 3.0 2.0 1.0 0.7 0.5 0.3 0.2 0.1 10
BANDWIDTH = 1.0 Hz 300 µA 100 µA 30 µA 10 µA
I C = 10 mA
16
NF, NOISE FIGURE (dB)
I C = 10 mA
3.0 mA 1.0 mA
12
300 µA
8.0
3.0 µA 1.0 µA
100 µA
4.0
30 µA BANDWIDTH = 1.0 Hz
10 µA
0 20 50 100 200 500 1 k 2k 5 k 10 k 20 k 50 k 100 k 10 20 50 100 200 500 1 k 2k 5 k 10 k 20 k 50 k 100 k
R S , SOURCE RESISTANCE (OHMS)
R S , SOURCE RESISTANCE (OHMS)
Figure 6. Total Noise Voltage
Figure 7. Noise Figure
O7–3/4
LESHAN RADIO COMPANY, LTD.
MMBT2484LT1
h FE , DC CURRENT GAIN (NORMALIZED)
4.0 3.0
V CE = 5.0 V
2.0
T A = 125°C 25°C
1.0
–55°C
0.7 0.5 0.4 0.3 0.2 0.01 0.02 0.03 0.05 0.1 0.2 0.3 0.5 1.0 2.0 3.0 5.0 10
I C , COLLECTOR CURRENT (mA)
Figure 8. DC Current Gain
RθVBE , BASE– EMITTER TEMPERATURE COEFFICIENT (mV/ °C)
1.0
–0.4
T J = 25°C
0.8
–0.8
V, VOLTAGE (VOLTS)
0.6
V BE@ V CE= 5.0 V
–1.2
0.4
–1.6
TJ = 25°C to125°C
0.2
–2.0
–55°C to 25°C
–2.4 0.01 0.02 0.05 0.1 0.2 0.5 1.0 2.0 5.0 10 20 50 100
VCE(sat) @I C/I B=10
0 0.01 0.02 0.05 0.1 0.2 0.5 1.0 2.0 5.0 10 20 50 100
I C , COLLECTOR CURRENT (mA)
I C , COLLECTOR CURRENT (mA)
Figure 9. “On” Voltages
Figure 10. Temperature Coefficients
f T , CURRENT– GAIN — BANDWIDTH PRODUCT (MHz)
8.0 6.0
500
T J = 25°C C ob C eb C ib
300
C, CAPACITANCE (pF)
4.0 3.0
200
C cb
2.0
1.00
70 50 1.0
V CE = 5.0 V T J = 25°C
2.0 3.0 5.0 7.0 10 20 30 50 70 100
1.0 0.8 0.1 0.2 0.5 1.0 2.0 5.0 10 20 50 100
V R , REVERSE VOLTAGE (VOLTS)
I C , COLLECTOR CURRENT (mA)
Figure 11. Capacitance
Figure 12. Current–Gain — Bandwidth Product
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