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PDF MGA-785T6 Data sheet ( Hoja de datos )
| Número de pieza | MGA-785T6 | |
| Descripción | Low Noise Amplifier | |
| Fabricantes | AVAGO | |
| Logotipo |  |
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MGA-785T6
Low Noise Amplifier with Bypass Switch
Data Sheet
Description/Applications
The MGA-785T6 is an easy–to–use GaAs MMIC Low Noise
Amplifier (LNA) that offer excellent linearity and low noise
figure for application from 0.1 to 1.5 GHz. The device is
housed in Ultra Thin Small Leadless Package (UTSLP) with
0.4mm package thickness.
The MGA-785T6 features a typical noise figure of 1.5 dB
and 15.7 dB associated gain from single stage, feedback
FET amplifier. The output is internally matched to 50Ω.
The input is optimally internally matched for lowest noise
figure into 50Ω. The input may be additionally externally
matched for low VSWR through the addition of a single
series inductor. When set into the bypass mode, both
input and output are internally matched to 50 Ω.
The MGA-785T6 offers an integrated solution of LNA with
adjustable IIP3. The IIP3 can be fixed to a desired current
level for the receiver’s linearity requirements. The LNA has
a bypass switch function, which sets the current to zero
and provides low insertion loss. The bypass mode also
boosts dynamic range when high level signal is being
received.
Package Marking & Orientation
Features
• Operating Freq = 0.1 ~1.5 GHz
• Bypass Switch on Chip
• Adjustable Input IP3
• Miniature Surface Mount 2.0x1.3x0.4 mm3 6-lead UTSLP
Specifications at 600 MHz; 3V 10 mA (Typ.)
• 1.5 dB Noise Figure
• 15.7 dB Gain
• Bypass Switch on chip
Loss = -2.6 dB
IIP3 = + 29.5 dBm
Applications
LNA for DVB-T, DVB-H, T-DMB, ISDB-T, DAB and MediaFLO
78YM
Pin 6 : NC
Pin 5 : RF_Out
and Vd
Pin 4 : NC
Top View
78 = Device Code
Y = Year of manufacture
M = Month of manufacture
Bottom View
Pin 1 : NC
Pin 2 : RF_IN
and Vref
Pin 3 : NC
1 page  
MGA-785T6 Typical Performance,
TA = 25 °C, Vd = 3V, Id = 10mA (unless otherwise specified). All data as measured in Figure 1a test circuit.
62
2.7V 2.7V
5
3.0V 1.8
3.0V
3.3V 3.3V
4 1.6
3
2
1
0.0 0.5 1.0
FREQUENCY (GHz)
Figure 8. Noise Figure vs Frequency and Voltage (Vd)
18
16
14
12
10
8
6
4
0.0 0.5 1.0
FREQUENCY (GHz)
Figure 10. Gain vs Frequency and Voltage (Vd)
1.5
2.7V
3.0V
3.3V
1.5
15
2.7V
10 3.0V
3.3V
5
0
-5
0.0
0.5 1.0
FREQUENCY (GHz)
1.5
Figure 12. Input Third Order Intercept Point vs Frequency and Voltage (Vd)
1.4
1.2
1
0.4 0.5 0.6 0.7 0.8
FREQUENCY (GHz)
Figure 9. Noise Figure vs Frequency (0.4 – 0.8GHz) and Voltage (Vd)
18
2.7V
17 3.0V
3.3V
16
15
14
0.4
0.5 0.6 0.7
FREQUENCY (GHz)
Figure 11. Gain vs Frequency (0.4 – 0.8GHz) and Voltage (Vd)
0.8
10
2.7V
8 3.0V
3.3V
6
4
2
0
0 0.5 1 1.5
FREQUENCY (GHz)
Figure 13. Output Power at 1dB Compression vs Frequency and Voltage (Vd)
5 Page 
MGA-785T6 Typical Scattering Parameters and Noise Parameters,
Tc = 25°C, Zo = 50ohm, Vd = 3V, Id = 10mA, Vref = -0.63V (Test circuit of Figure 1b)
Freq S11 S21 S12
GHz Mag Ang dB Mag Ang Mag Ang
0.1 0.78 -9.70 15.14 5.72 173.10 0.05 18.90
0.2
0.77
-13.90
15.04
5.65 170.20 0.05
19.20
0.3
0.75
-18.10
14.93
5.58 167.40 0.05
19.40
0.4
0.74
-22.20
14.83
5.51 164.50 0.05
19.70
0.5
0.73
-26.40
14.72
5.45 161.60 0.05
19.90
0.6
0.72
-30.70
14.62
5.38 158.70 0.05
20.70
0.7
0.71
-35.00
14.51
5.32 155.90 0.06
21.50
0.8
0.70
-39.20
14.40
5.25 153.00 0.06
22.20
0.9
0.69
-43.50
14.30
5.19 150.10 0.06
23.00
1.0
0.68
-47.10
14.20
5.13 147.30 0.06
23.90
1.5
0.66
-64.50
13.65
4.81 133.80 0.07
25.70
1.9
0.64
-77.70
13.20
4.57 123.70 0.08
26.60
2.0
0.64
-80.20
13.09
4.52 122.20 0.08
27.10
2.5
0.63
-91.00
12.47
4.20 112.70 0.10
24.10
3.0
0.61
-108.40
12.25
4.10 101.70 0.11
20.90
3.5
0.59
-126.10
12.07
4.01
87.20
0.13
13.00
4.0
0.56
-146.00
11.22
3.64
74.30
0.13
6.20
4.5
0.54
-159.80
10.42
3.32
63.00
0.13
0.60
5.0 0.54 -172.40 9.71 3.06 51.00 0.14 -3.50
5.5 0.54 172.00 9.17 2.87 42.30 0.14 -9.00
5.7 0.55 166.10 8.91 2.79 38.90 0.14 -10.20
6.0 0.57 157.50 8.84 2.77 33.50 0.14 -12.60
7.0 0.61 135.60 7.05 2.25 12.50 0.15 -21.30
8.0 0.65 115.50 5.83 1.96 -2.00 0.15 -28.80
9.0 0.68 99.80 4.51 1.68 -17.60 0.15 -36.10
10.0 0.72 87.20 3.39 1.48 -31.10 0.15 -41.80
S22
Mag Ang
0.46 -9.20
0.46 -10.60
0.46 -12.00
0.45 -13.40
0.45 -14.80
0.44 -17.20
0.44 -19.50
0.44 -21.90
0.43 -24.20
0.43 -26.70
0.42 -39.30
0.40 -47.90
0.40 -52.80
0.39 -64.70
0.37 -77.00
0.35 -89.40
0.33 -102.80
0.29 -115.40
0.26 -134.80
0.21 -142.00
0.20 -153.30
0.16 -157.10
0.24 157.70
0.31 135.60
0.35 120.00
0.40 108.80
Freq Fmin
Γopt
GHz dB Mag Ang Rn / 50
0.1 1.22 0.18 6.90 0.21
0.5 1.29 0.17 28.30 0.21
1.0 1.38 0.18 56.70 0.21
1.5 1.47 0.20 84.20 0.21
2.0 1.56 0.22 109.40 0.21
2.5 1.72 0.24 120.00 0.21
3.0 1.89 0.27 134.20 0.21
3.5 2.03 0.31 164.70 0.20
4.0 2.10 0.34 176.40 0.18
4.5 2.17 0.36 -172.00 0.16
5.0 2.22 0.39 -157.00 0.15
5.5 2.29 0.42 -146.90 0.14
6.0 2.36 0.45 -137.80 0.13
Note :
1. Fmin values at 2 GHz and higher are based on measurements while the Fmin below 2 GHz have been extrapolated. The Fmin values are based on
a set of 16 noise figure measurements made at 16 different impedances using an ATN NP5 test system. From these measurements a true Fmin is
calculated.
11
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