A
AC251
TYPICAL PERFORMANCE
Gain vs Temperature Vcc = 5
9.0
GAIN - dB
8.0
7.0
6.0
5.0
5
10
30
50
100
150
200
FREQUENCY - MHz
250
300
350
KEY: +25
°C
+85
°C
-55
°C
Model: AC251
FREQ
MHZ
5
10
20
50
100
200
300
SWR
IN
1.12
1.09
1.08
1.07
1.06
1.03
1.29
TYPICAL AUTOMATIC
TEST DATA
SWR
OUT
1.13
1.10
1.09
1.09
1.12
1.17
1.29
Vcc=+5V
GAIN
PHASE
DB
DEG
7.97
10
8.13
3
8.19
-2
8.20
-13
8.14
-27
8.17
-56
8.22
-88
GROUP DELAY
NSEC
Icc=10.76
REV/ISO
DB
-11.0
-10.9
-10.8
-10.8
-11.0
-11.4
-12.0
1.6
0.97
0.81
0.8
0.88
NOISE FIGURE - dB
Noise Figure
3.0
2.0
1.0
0.0
5
10
30
50
100
150
200
FREQUENCY - MHz
250
300
350
+8 V
+5 V
Model: AC251
FREQ.
MHz
5
10
20
50
100
200
300
Model: AC251
FREQ
MHZ
5
10
20
50
100
200
300
S11
MAG
0.06
0.04
0.04
0.03
0.03
0.02
0.13
ANG
152.4
152.1
148.2
133.8
109.4
156.5
179.8
LINEAR S-PARAMETERS
Vcc=+5V
S21
S12
MAG
ANG
MAG
ANG
2.50
10.1
0.281
10.4
2.55
3.2
0.287
3.3
2.57
-2.5
0.288
-2.4
2.57
-13.0
0.287
-12.4
2.55
-27.5
0.282
-26.6
2.56
-56.2
0.270
-54.6
2.58
-87.9
0.250
-85.3
Vcc=+8V
GAIN
PHASE
DB
DEG
7.74
16
7.98
6
8.11
-1
8.16
-12
8.14
-26
8.16
-55
8.23
-86
Icc=10.76
S22
MAG
ANG
0.06
165.4
0.05
156.1
0.04
146.9
0.04
127.5
0.06
108.2
0.08
101.8
0.13
136.5
Icc=19.78
REV/ISO
DB
-11.2
-11.0
-10.9
-10.9
-11.0
-11.4
-12.1
Power Output at 1 dB Compression
20.0
OUTPUT POWER - dBm
18.0
16.0
14.0
12.0
10.0
5
10
30
50
100
150
200
FREQUENCY - MHz
250
300
350
+8 V
+5 V
SWR
IN
1.34
1.22
1.17
1.13
1.11
1.07
1.30
SWR
OUT
1.34
1.23
1.18
1.16
1.18
1.23
1.29
GROUP DELAY
NSEC
1.9
1.0
0.81
0.79
0.86
Intercept Point Vcc = 8
70
INTERCEPT POINT - dBm
60
50
40
30
20
10
5
10
30
50
100
150
200
FREQUENCY - MHz
250
300
350
IP 3
IP 2
2nd HAR
Model: AC251
FREQ.
MHz
5
10
20
50
100
200
300
S11
MAG
0.14
0.10
0.08
0.06
0.05
0.04
0.13
ANG
137.4
141.3
143.2
137.8
122.3
135.5
171.7
LINEAR S-PARAMETERS
Vcc=+8V
S21
S12
MAG
ANG
MAG
ANG
2.44
15.5
0.275
15.9
2.51
6.2
0.282
6.4
2.54
-0.6
0.285
-0.5
2.56
-11.8
0.286
-11.5
2.55
-26.4
0.281
-26.1
2.56
-55.0
0.269
-54.2
2.58
-86.1
0.250
-84.9
Icc=19.78
S22
MAG
ANG
0.15
145.8
0.10
143.2
0.08
141.0
0.07
128.6
0.08
110.8
0.10
97.0
0.13
123.9
Intercept Point Vcc = 5
70
INTERCEPT POINT - dBm
60
50
IP 2
40
IP 3
30
20
10
5
10
30
50
100
150
200
FREQUENCY - MHz
250
300
350
2nd HAR
PHASE NOISE dBc/Hz
-110
-120
-130
-140
Amplifier Phase Noise
Po =19.5 dBm / Freq.=200 MHz
AC251
-150
-160
-170
10
100
1000
10000
100000
OFFSET FREQUENCY - Hz
1000000
Noise Floor
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