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AD8348
TYPICAL PERFORMANCE CHARACTERISTICS
VGA AND DEMODULATOR
30
25
20
15
10
5
0
–5
–10
–15
LINERR T = +85°C, V POS = 5V, FREQ = 380MHz
LINERR T = +25°C, V POS = 5V, FREQ = 380MHz
LINERR T = –40°C, V POS = 5V, FREQ = 380MHz
T = +85°C, V POS = 5V, FREQ = 380MHz
T = +25°C, V POS = 5V, FREQ = 380MHz
T = –40°C, V POS = 5V, FREQ = 380MHz
4
3
2
1
0
–1
–2
–3
–4
–5
25
20
15
10
5
0
–5
–10
–15
–20
L INERR      T = +85°C, V POS = 2.7V, FREQ = 900MHz
LINERR T = +25°C, V POS = 2.7V, FREQ = 900MHz
LINERR T = –40°C, V POS = 2.7V,
FREQ = 900MHz
T = +85°C, V POS = 2.7V,
FREQ = 900MHz
T = +25°C, V POS = 2.7V, FREQ = 900MHz
T = –40°C, V POS = 2.7V, FREQ = 900MHz
4
3
2
1
0
–1
–2
–3
–4
–5
–20
0.2
0.3
0.4
0.5
0.6
0.7 0.8
0.9
1.0
1.1
–6
1.2
–25
0.2
0.3
0.4
0.5
0.6
0.7 0.8
0.9
1.0
1.1
–6
1.2
VGIN (V)
Figure 12. Mixer Gain and Linearity Error vs. VGIN, V POS = 5 V, F IF = 380 MHz,
F BB = 1 MHz, Temperature = ?40°C, +25°C, +85°C
VGIN (V)
Figure 15. Mixer Gain and Linearity Error vs. VGIN, V POS = 2.7 V, F IF = 900 MHz,
F BB = 1 MHz, Temperature = ?40°C, +25°C, +85°C
25
20
15
10
5
LINERR T = +85°C, V POS = 5V, FREQ = 900MHz
LINERR T = +25°C, V POS = 5V, FREQ = 900MHz
LINERR T = –40°C, V POS = 5V,
FREQ = 900MHz
4
3
2
1
0
28
26
24
5V, 0.2V, +25° C
0
–1
–5
–10
–15
T = +85°C, V POS = 5V,
FREQ = 900MHz
T = +25°C, V POS = 5V, FREQ = 900MHz
–2
–3
–4
22
20
2.7V, 0.2V, +25° C
2 .7V,   0.2V, +85°C
5 V, 0.2V, +85°C
5V, 0.2V, –40°C
–20
T = –40°C, V POS = 5V, FREQ = 900MHz
–5
2.7V, 0.2V, –40° C
–25
0.2
0.3
0.4
0.5
0.6
0.7 0.8
0.9
1.0
1.1
–6
1.2
18
100
200
300
400 500 600 700
800
900
1000
VGIN (V)
Figure 13. Mixer Gain and Linearity Error vs. VGIN, V POS = 5 V, F IF = 900 MHz,
F BB = 1 MHz, Temperature = ?40°C, +25°C, +85°C
IF FREQUENCY (MHz)
Figure 16. Gain vs. F IF , VGIN = 0.2 V, F BB = 1 MHz,
Temperature = ?40°C, +25°C, +85°C
30
25
20
15
10
5
0
–5
–10
–15
LINERR T = +85°C, V POS = 2.7V, FREQ = 380MHz
L INERR      T = +25°C, V POS = 2.7V, FREQ = 380MHz
LINERR T = –40°C, V POS = 2.7V,
FREQ = 380MHz
T = +85°C, V POS = 2.7V,
FREQ = 380MHz
T = +25°C, V POS = 2.7V, FREQ = 380MHz
T = –40°C, V POS = 2.7V, FREQ = 380MHz
4
3
2
1
0
–1
–2
–3
–4
–5
–15
–20
–25
5V, 1.2V, +85 °C
2.7V, 1.2V, +85 °C
5V, 1.2V, –40°C
2 .7V,   1.2V, +25°C
2.7V, 1.2V, –40°C
5V, 1.2V, +25 °C
–20
0.2
0.3
0.4
0.5
0.6
0.7 0.8
0.9
1.0
1.1
–6
1.2
–30
100
200
300
400 500 600 700
800
900
1000
VGIN (V)
Figure 14. Mixer Gain and Linearity Error vs. VGIN, V POS = 2.7 V, F IF = 380 MHz,
F BB = 1 MHz, Temperature = ?40°C, +25°C, +85°C
Rev. A | Page 11 of 28
IF FREQUENCY (MHz)
Figure 17. Gain vs. F IF , VGIN = 1.2 V, F BB = 1 MHz,
Temperature = ?40°C, +25°C, +85°C
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