鈥?/div>
IDEAL FOR 1-2 GHz OSCILLATORS
3
C2
3
4
B2
DESCRIPTION
NEC's UPA862TD contains one NE851 and one NE685 NPN
high frequency silicon bipolar chip. The NE851 is an excellent
oscillator chip, featuring low 1/f noise and high immunity to
pushing effects. The NE685 is an excellent buffer transistor,
featuring low noise and high gain. NEC's new ultra small TD
package is ideal for all portable wireless applications where
reducing board space is a prime consideration. Each transistor
chip is independently mounted and easily configured for oscil-
lator/buffer amplifier and other applications.
0.5鹵0.05
0.125
+0.1
-0.05
PIN CONNECTIONS
1. Collector (Q1)
2. Emitter (Q1)
3. Collector (Q2)
4. Base (Q2)
5. Emitter (Q2)
6. Base (Q1)
ELECTRICAL CHARACTERISTICS
(T
A
= 25擄C)
PART NUMBER
PACKAGE OUTLINE
SYMBOLS
I
CBO
I
EBO
h
FE
PARAMETERS AND CONDITIONS
Collector Cutoff Current at V
CB
= 5 V, I
E
= 0
Emitter Cutoff Current at V
EB
= 1 V, I
C
= 0
DC Current Gain
1
at V
CE
= 3 V, I
C
= 10 mA
Gain Bandwidth at V
CE
= 3 V, I
C
= 10 mA, f = 2 GHz
Feedback Capacitance
2
at V
CB
= 3 V, I
E
= 0, f = 1 MHz
Insertion Power Gain at V
CE
= 3 V, I
C
=10 mA, f = 2 GHz
Noise Figure at V
CE
= 3 V, I
C
= 3 mA, f = 2 GHz
Collector Cutoff Current at V
CB
= 10 V, I
E
= 0
Emitter Cutoff Current at V
EB
= 1 V, I
C
= 0
DC Current Gain
1
at V
CE
= 3 V, I
C
= 7 mA
Gain Bandwidth at V
CE
= 1 V, I
C
= 15 mA, f = 2 GHz
Feedback Capacitance
2
at V
CB
= 3 V, I
E
= 0, f = 1 MHz
Insertion Power Gain at V
CE
= 1 V, I
C
=5 mA, f = 2 GHz
GHz
pF
dB
dB
dB
3.0
4.5
GHz
pF
dB
dB
nA
nA
100
5.0
120
6.5
0.6
4.0
5.5
1.9
2.5
0.8
7
UNITS
nA
nA
75
10
110
12
0.4
8.5
1.5
2.5
600
600
145
0.7
MIN
UPA862TD
TD
TYP
MAX
100
100
150
Q1
f
T
Cre
|S
21E
|
2
NF
I
CBO
I
EBO
h
FE
Q2
f
T
Cre
|S
21E
|
2
|S
21
|S
21E
|
2E
|
2
Insertion Power GainIat V
CE
= 1 V, I
C
=15 mA, f = 2 GHz
NF
Noise Figure at V
CE
= 1 V, I
C
= 10 mA, f = 2 GHz
Notes: 1. Pulsed measurement, pulse width
鈮?/div>
350
碌s,
duty cycle
鈮?/div>
2 %.
2. Collector to base capacitance when measured with capacitance meter (automatic balanced bridge method), with emitter connected to
guard pin of capacitances meter.
California Eastern Laboratories
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