Page 1
E2Q0023-38-71
This version: Jul. 1998
Previous version: Jan. 1998
KGF1254B/1254¡ electronic components
¡ electronic components
KGF1254B/1254
Medium-Power Amplifier
GENERAL DESCRIPTION
The KGF1254B is a medium-power amplifier, with frequencies ranging from the UHF-band to
the L-band, that features high output power, low noise, and low current operation. The
KGF1254B specifications are guaranteed to a fixed matching circuit for 5.2 V and 850 MHz;
external impedance-matching circuits are also required. Because of the low noise and high
output power at the low operating current, the KGF1254B is ideal as a transmitter-driver
amplifier for personal handy phones.
The KGF1254 is an amplifier similar to the KGF1254B in specifications and typical properties.
Although having S Parameters that are slightly different from those of the KGF1254B, the
KGF1254 meets the specifications for the KGF1254B, even with the same matching circuits as
those of the KGF1254B.
FEATURES
• High output power: 20 dBm (min.)
• Low noise: 2.5 dB (max.)
• Low current operation: 80 mA (max.)
• Self-bias circuit configuration with built-in source capacitor
• Package: 4PSOP
PACKAGE DIMENSIONS
1.8±0.1
0.85±0.05
0.6
3.0±0.2
+0.1
–0.05
1.5±0.15
1.9±0.1
2.8±0.15
0.4
+0.1
–0.05
Note: Ask our sales department for detailed requirements of the KGF1254.
1.1±0.15
0.36 0.74
+0.03
0.125
–0
(Unit: mm)
0.3 MIN
0 to 0.15
Package material
Lead frame material
Pin treatment
Solder plate thickness
Epoxy resin
42 alloy
Solder plating
5 mm or more
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MARKING
(4) (3)
X
XD
KGF1254B/1254¡ electronic components
CIRCUIT
(1)
Gate(1)
GND(4)
(2)
NUMERICAL
ALPHABETICAL
PRODUCT TYPE
Drain(3)
Source(2)
LOT
NUMBER
(1) Gate
(2) Source
(3) Drain
(4) GND
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ABSOLUTE MAXIMUM RATINGS
KGF1254B/1254¡ electronic components
Item
Drain-Source voltage
Gate-Source voltage
Drain current I
Total power dissipation
Channel temperature
Storage temperature T
Symbol Condition Max.Unit
V
DS
V
GS
DS
P
tot
T
ch
stg
Ta = 25°C
Ta = 25°C
V
V
Ta = 25°C 360mA —
Ta = 25°C
—
mW
°C
— 125°C
Min.
—
–5.0
—
—
–45
10
0.4
300
150
ELECTRICAL CHARACTERISTICS
(Ta = 25°C)
Item
Gate-Source leakage current 72
Gate-Drain leakage current 360mA—VGD = –15 V —
Drain-Source leakage current 720mA—VDS = 3 V, VGS = –2.5 V —
Drain current —mA 130VDS = 3 V, VGS = 0 V —
Operating current 80.0mA —
Gate-Source cut-off voltage –1.0V –2.0VDS = 3 V, IDS = 720 mA—
Transconductance —mS 125VDS = 3 V, IDS = 60 mA —
Noise figure 2.5dB —(*1), f = 850 MHz —
Linear gain G
Output power P
Symbol Condition Max.Unit
I
GSS
I
GDO
I
DS(off)
I
DSS
V
GS(off)
g
I
D
m
= –3 V
V
GS
(*1), P
= 10 dBm,
IN
f = 850 MHz
mA
F
(*1), P
–10 dBm
LIN
(*2), P
–10 dBm
=
IN
=
IN
f = 850 MHz
f = 1.5 GHz
f = 1.9 GHz
f = 850 MHz
f = 1.5 GHz
dB
f = 1.9 GHz
(*1), P
10 dBm
O
(*2), P
10 dBm
=
IN
=
IN
f = 850 MHz
f = 1.5 GHz
f = 1.9 GHz
f = 850 MHz
f = 1.5 GHz
dBm
f = 1.9 GHz
Min.
—
14.0
—
—
—
— 20.0
Typ.
—
—
17.0
13.5
11.0
17.0
—
—
—
—
—— 13.0
—— 10.0
—20.0 22.0
—
—— 18.0
—— 20.0
—— 16.0
—— 15.0
*1 Self-bias condition: V
*2 Self-bias condition: V
= 5.2 V, VG = 0 V
DD
= 3 V, VG = 0 V
DD
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RF CHARACTERISTICS
KGF1254B/1254¡ electronic components
4/14
Page 5
KGF1254B/1254¡ electronic components
5/14
Page 6
KGF1254B/1254¡ electronic components
6/14
Page 7
KGF1254B/1254¡ electronic components
7/14
Page 8
KGF1254B/1254¡ electronic components
8/14
Page 9
Typical S Parameters of KGF1254B
Freq(MHz)
1000.0
1100.0
1200.0
1300.0
1400.0
1500.0
1600.0
1700.0
1800.0
1900.0
2000.0
2100.0
2200.0
2300.0
2400.0
2500.0
2600.0
2700.0
2800.0
2900.0
3000.0
MAG(S11) ANG(S11) MAG(S21) ANG(S21) MAG(S12) ANG(S12) MAG(S22) ANG(S22)
500.0
600.0
700.0
800.0
900.0
0.882
0.858
0.828
0.797
0.770
0.741
0.720
0.700
0.681
0.666
0.656
0.648
0.636
0.629
0.629
0.623
0.620
0.616
0.621
0.623
0.623
0.625
0.632
0.635
0.638
0.647
–54.29
–61.91
–70.32
–77.65
–84.78
–91.04
–97.10
–102.38
–107.86
–113.07
–117.36
–122.06
–126.25
–130.79
–135.10
–139.85
–144.21
–147.51
–152.56
–156.23
–160.44
–164.40
–168.81
–172.79
–177.44
178.65
6.342
5.839
5.529
5.244
4.984
4.689
4.430
4.176
3.958
3.747
3.590
3.402
3.263
3.095
2.973
2.851
2.717
2.619
2.498
2.408
2.304
2.217
2.128
2.047
1.965
1.895
129.65
124.19
117.60
110.96
104.10
97.72
91.83
86.10
80.86
75.51
70.87
65.72
61.49
57.06
52.30
48.02
43.82
39.65
35.18
31.36
27.83
23.62
19.87
16.31
12.51
8.54
0.044
0.050
0.050
0.055
0.058
0.062
0.068
0.076
0.084
0.093
0.099
0.108
0.119
0.128
0.138
0.152
0.166
0.178
0.192
0.205
0.218
0.230
0.243
0.256
0.270
0.283
KGF1254B/1254¡ electronic components
V
= 3 V, VG = 0 V, ID = 43.8 mA
DD
59.98
57.96
59.06
63.86
63.60
65.29
66.39
67.73
69.74
69.37
68.47
70.21
70.91
68.98
69.75
66.93
67.20
64.35
64.22
61.50
58.91
56.57
54.01
52.28
49.71
47.52
0.291
0.299
0.296
0.289
0.287
0.279
0.276
0.280
0.290
0.292
0.307
0.309
0.318
0.330
0.348
0.358
0.363
0.386
0.395
0.406
0.429
0.441
0.457
0.471
0.486
0.508
–91.01
–102.52
–112.71
–119.30
–125.16
–128.77
–132.96
–135.93
–137.58
–140.07
–143.39
–146.87
–148.45
–151.18
–154.04
–155.23
–159.28
–163.29
–165.34
–169.53
–171.79
–175.67
–179.59
177.80
173.52
169.33
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Page 10
Typical S Parameters of KGF1254B
V
= 3 V, VG = 0 V, ID = 43.8 mA
DD
Frequency : 0.5 to 3.0 GHz
KGF1254B/1254¡ electronic components
Z0 = 50 W
10/14
Page 11
Typical S Parameters of KGF1254B
Freq(MHz)
1000.0
1100.0
1200.0
1300.0
1400.0
1500.0
1600.0
1700.0
1800.0
1900.0
2000.0
2100.0
2200.0
2300.0
2400.0
2500.0
2600.0
2700.0
2800.0
2900.0
3000.0
MAG(S11) ANG(S11) MAG(S21) ANG(S21) MAG(S12) ANG(S12) MAG(S22) ANG(S22)
500.0
600.0
700.0
800.0
900.0
0.885
0.864
0.836
0.812
0.786
0.765
0.743
0.725
0.707
0.697
0.689
0.679
0.673
0.667
0.669
0.661
0.660
0.660
0.667
0.663
0.665
0.671
0.677
0.682
0.680
0.688
–52.63
–59.83
–67.93
–75.08
–82.06
–88.22
–94.20
–99.50
–105.20
–110.17
–114.84
–119.36
–123.74
–128.52
–133.13
–137.70
–142.35
–145.82
–151.02
–155.34
–159.71
–163.88
–168.72
–173.12
–177.75
178.08
6.302
5.861
5.553
5.277
5.005
4.724
4.471
4.221
3.978
3.783
3.624
3.432
3.289
3.123
2.995
2.872
2.730
2.630
2.497
2.411
2.294
2.208
2.118
2.025
1.936
1.854
130.04
124.38
117.38
110.70
103.96
97.24
91.06
85.19
79.95
74.02
69.53
64.21
59.89
55.16
50.31
45.87
41.41
37.21
32.36
28.42
24.90
20.26
16.64
12.64
8.81
4.75
0.040
0.043
0.045
0.047
0.051
0.056
0.062
0.068
0.079
0.084
0.094
0.105
0.115
0.127
0.139
0.154
0.166
0.180
0.199
0.215
0.225
0.241
0.259
0.272
0.284
0.301
KGF1254B/1254¡ electronic components
V
= 5 V, VG = 0 V, ID = 45.1 mA
DD
61.92
59.74
60.36
62.83
62.81
68.01
71.47
73.68
76.17
76.17
75.92
79.05
77.97
76.07
76.30
73.45
74.08
69.70
68.97
67.08
63.38
60.62
57.47
55.78
52.98
50.65
0.322
0.321
0.315
0.307
0.300
0.299
0.298
0.303
0.311
0.326
0.334
0.341
0.353
0.367
0.388
0.403
0.408
0.427
0.444
0.459
0.479
0.493
0.510
0.523
0.542
0.557
–76.26
–86.96
–96.63
–102.22
–107.66
–111.14
–114.83
–119.37
–122.26
–125.15
–128.57
–132.48
–135.45
–138.21
–142.51
–144.74
–149.35
–153.97
–157.05
–161.21
–164.88
–168.63
–173.48
–177.27
178.12
173.21
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Typical S Parameters of KGF1254B
V
= 5 V, VG = 0 V, ID = 45.1 mA
DD
Frequency : 0.5 to 3.0 GHz
KGF1254B/1254¡ electronic components
Z0 = 50 W
12/14
Page 13
Test Circuit and Bias Configuration for KGF1254B at 850 MHz
KGF1254B/1254¡ electronic components
C
S
RFC
(2)
(1) (3)
KGF
1254B
(4)
T
7
F(Feed through)
T
T
5
4
T
6
C
3
T4: Z0 = 75 W, E = 30 deg
T
: Z0 = 75 W, E = 30 deg
5
T
: Z0 = 100 W, E = 1 deg
7
= 1000 pF
IN
R
G
C
C
C
1
T
T
2
1
T
3
C
2
T1: Z0 = 75 W, E = 30 deg
T
: Z0 = 75 W, E = 28 deg
2
T
= T6: Z0 = 100 W, E = 5 deg
3
C
= 7.0 pF, C2 = 0.8 pF, C3 = 5.0 pF, C4 = 5.5 pF, CS = 100 pF
1
C
C(DC Block)
RFC = 200 nH, R
= 1000 pF, C
= 1000 W
G
Test Circuit and Bias Configuration for KGF1254B at 1.5 GHz
C
S
C
B
C
F
V
DD
OUT
C
C
C
4
C
F
V
DD
IN
T
T
2
1
(2)
(1) (3)
KGF
1254B
C
C
R
T
G
3
C
1
(4)
T
8
T1: Z0 = 75 W, E = 65 deg
T
: Z0 = 75 W, E = 40 deg
2
T
= T6 = T7: Z0 = 100 W, E = 8 deg
3
C
= 2.4 pF, C2 = 1.2 pF, C3 = 0.6 pF, CS = 100 pF
1
C
C(DC Block)
RFC = 60 nH, R
= 1000 pF, C
= 1000 W
G
B(By-pass)
= 1000 pF, C
T
5
4
T
6
C
T
C
2
RFC
T
T4: Z0 = 75 W, E = 50 deg
T
: Z0 = 75 W, E = 50 deg
5
T
: Z0 = 100 W, E = 1 deg
8
F(Feed through)
= 1000 pF
OUT
C
C
7
3
13/14
Page 14
Test Circuit and Bias Configuration for KGF1254B at 1.9 GHz
KGF1254B/1254¡ electronic components
IN
C
S
T
T
2
1
(2)
(1) (3)
KGF
1254B
C
C
R
T
G
3
C
1
(4)
T
8
T1: Z0 = 75 W, E = 65 deg
T
: Z0 = 75 W, E = 40 deg
2
T
= T6 = T7: Z0 = 100 W, E = 1 deg
3
C
= 1.7 pF, C2 = 1.3 pF, C3 = 0.2 pF, CS = 100 pF
1
C
C(DC Block)
RFC = 60 nH, R
= 1000 pF, C
= 1000 W
G
B(By-pass)
= 1000 pF, C
C
T
4
T
6
C
C
B
RFC
T
5
T
C
2
T4: Z0 = 75 W, E = 50 deg
T
: Z0 = 75 W, E = 50 deg
5
T
: Z0 = 100 W, E = 1 deg
8
F(Feed through)
= 1000 pF
F
V
DD
OUT
C
C
7
3
14/14
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