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PDF MGA-685T6 Data sheet ( Hoja de datos )
| Número de pieza | MGA-685T6 | |
| Descripción | Low Noise Amplifier | |
| Fabricantes | AVAGO | |
| Logotipo |  |
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MGA-685T6
Current-Adjustable, Low Noise Amplifier
Data Sheet
Description
The MGA-685T6 is an easy–to–use GaAs MMIC amplifier
that offer excellent linearity and low noise figure for ap-
plication from 0.1 to 1.5 GHz. The device is housed in
Ultra Thin Small Leadless Package (UTSLP) with 0.4mm
package thickness.
One external resistor is used to set the bias current from
5 mA to 30 mA. This allows the designer to use the same
part in several circuit positions and tailor the linearity
performance (and current consumption) to suit each
position.
The output of the amplifier is matched to 50Ω (below
2:1 VSWR) across the entire bandwidth and only requires
minimum input matching. The amplifier allows a wide
dynamic range by offering a 0.93 dB NF coupled with a
+18.7 dBm Output IP3. The circuit uses state-of-the art E-
pHEMT technology with proven reliability.
Package Marking & Orientation
Features
• Single +3V supply
• High Linearity
• Low Noise figure
• Miniature Surface Mount 2.0x1.3x0.4 mm3 6-lead
UTSLP
Specifications at 500 MHz; 3V 10 mA (Typ.)
• 0.93 dB Noise Figure
• 18.7 dBm OIP3
• 18.9 dB Gain
• 17.3 dBm P1dB
Applications
LNA for DVB-T, DVB-H, T-DMB, ISDB-T, DAB and MediaFLO
6688YYMM
Top View
Pin 6 : Bias
Pin 5 : RF_Out
and Vd
Pin 4 : NC
Pin 1 : NC
Pin 2 : RF_IN
Pin 3 : NC
Bottom View
68 = Device Code
Y = Year of manufacture
M = Month of manufacture
1 page  
MGA-685T6 Typical Performance, Vd = 3V, Ids = 5mA ,R1 = 10KW as measured in Fig 1a test circuit (unless specified
otherwise)
24 24
-40°C
22 22 25°C
20 85°C
20
18
16
-40°C
18
25°C
14
16
85°C
12
0.0
0.5 1.0
FREQUENCY (GHz)
Figure 6. OP1dB vs Frequency (Vd = 3V, Ids = 5mA)
14
1.5 0.0 0.5 1.0
FREQUENCY (GHz)
Figure 7. OIP3 vs Frequency (Vd = 3V, Ids = 5mA)
1.5
22
20
18
16
14
12
10
8
0.0
0.5 1.0
FREQUENCY (GHz)
Figure 8. Gain vs Frequency (Vd = 3V, Ids = 5mA)
-40°C
25°C
85°C
1.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0.0
0.5 1.0
FREQUENCY (GHz)
Figure 9. NF vs Frequency (Vd = 3V, Ids = 5mA)
-40°C
25°C
85°C
1.5
0
-2
-4
-6
-8
-10
-12
-14
-16
-18
0.0
0.5 1.0
FREQUENCY (GHz)
-40°C
25°C
85°C
1.5
Figure 10. Input Return Loss vs Frequency (Vd = 3V, Ids = 5mA)
0
-40°C
-4 25°C
85°C
-8
-12
-16
-20
0.0
0.5 1.0
FREQUENCY (GHz)
1.5
Figure 11. Output Return Loss vs Frequency (Vd = 3V, Ids = 5mA)
5 Page 
MGA-685T6 Typical Performance, Vd = 5V, Ids = 15mA ,R1 = 5.6KW as measured in Fig 1a test circuit (unless specified
otherwise)
26 26
24 24
22 22
20 20
18
-40°C
18
-40°C
16 25°C 16 25°C
14 85°C 14 85°C
0.0 0.5 1.0 1.5
0.0 0.5 1.0 1.5
FREQUENCY (GHz)
FREQUENCY (GHz)
Figure 39. OP1dB vs Frequency (Vd = 5V, Ids = 15mA)
Figure 40. OIP3 vs Frequency (Vd = 5V, Ids = 15mA)
22
20
18
16
14
12
10
8
6
0.0 0.5 1.0
FREQUENCY (GHz)
Figure 41. Gain vs Frequency (Vd = 5V, Ids = 15mA)
-40°C
25°C
85°C
1.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0.0
0.5 1.0
FREQUENCY (GHz)
Figure 42. NF vs Frequency (Vd = 5V, Ids = 15mA)
-40°C
25°C
85°C
1.5
0
-2
-4
-6
-8
-10
-12
-14
-16
-18
0.0
0.5 1.0
FREQUENCY (GHz)
-40°C
25°C
85°C
1.5
Figure 43. Input Return Loss vs Frequency (Vd = 5V, Ids = 15mA)
0
-4
-8
-12
-16
-20
-24
-28
-32
-36
-40
0.0
0.5 1.0
FREQUENCY (GHz)
-40°C
25°C
85°C
1.5
Figure 44. Output Return Loss vs Frequency (Vd = 5V, Ids = 15mA)
Notes for Figure 6 ~ 44:
1. Measurement uses the test circuit and circuit schematics shows in Figure 1a.
2. Ids taken at ambient temperature of 25ºC with temperature variation.
3. Bias current (Ids) for the above charts are quiescent conditions. Actual level may increase or decrease depending on amount of RF drive.
11
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