Typical operating characteristics (continued) – Rainbow Electronics MAX2701 User Manual
Page 15
MAX2700/MAX2701
1.8GHz to 2.5GHz Direct Downconversion
Receivers
______________________________________________________________________________________
15
2.00
1.75
1.50
1.25
1.00
0.50
1.25
0.75
1.00
1.50
1.75
2.00
VGA1
VGA OUTPUT 1dB COMPRESSION
POINT vs. AGC VOLTAGE vs. RL
MAX2700/1-42
AGC (V)
V01 (PEAK TO PEAK)
R
L
= 0.6k
Ω
R
L
= 2.0k
Ω
R
L
= 1.1k
Ω
R
L
= 1.6k
Ω
20
30
50
40
60
70
0.6
1.0
0.8
1.2
1.4
1.6
1.8
2.0
VGA1
BANDWIDTH vs. R
L
MAX2700/1-43
R
L
(k
Ω
)
VGA1 BANDWIDTH (MHz)
3dB BANDWIDTH
1dB BANDWIDTH
5
15
10
25
20
30
35
0.50
1.00
1.25
0.75
1.50
1.75
2.00
VGA1
NOISE FIGURE vs. AGC VOLTAGE
vs. TEMPERATURE
MAX2700/1-41
AGC (V)
NF (dB)
T
A
= -45°C
T
A
= +85°C
T
A
= +25°C
-2.0
-1.5
-1.0
-0.5
0
0.5
1.0
1.5
2.0
0.50
1.00
0.75
1.25
1.50
1.75
2.00
I/Q VOLTAGE GAIN MISMATCH
vs. TEMPERATURE
MAX2700/1-40
AGC (V)
I/Q VOLTAGE GAIN (dB)
T
A
= +25
°
C
T
A
= +85
°
C
T
A
= -45
°
C
0
10
30
20
40
50
0.50
1.00
0.75
1.25
1.50
1.75
2.00
VGA2
VOLTAGE GAIN vs. AGC VOLTAGE
vs. TEMPERATURE
MAX2700/1-44
AGC (V)
VOLTAGE GAIN (dB)
T
A
= -45°C
T
A
= +85°C
T
A
= +25°C
0
10
30
20
40
0.50
1.00
0.75
1.25
1.50
1.75
2.00
AGC VOLTAGE GAIN vs. AGC VOLTAGE
vs. TEMPERATURE
MAX2700/1-39
AGC (V)
VOLTAGE GAIN (dB)
T
A
= +25°C
T
A
= -45°C
T
A
= +85°C
Typical Operating Characteristics (continued)
(MAX2700/MAX2701 EV kit (Figure 3), V
CC
= +3.0V, T
A
= +25°C, SHDN = GAIN_SET = V
CC
, X2_EN = GND, CEXT+ connected to
CEXT-, P
LO
= -13dBm, F
LO
= 980MHz (MAX2700) and 1200MHz (MAX2701), P
LNAIN
= -30dBm, P
RFIN
= -25dBm, LNAIN and RFIN
(single-ended input to balun) driven from 50
Ω
source, LNAOUT terminated into load; MIX_I, MIX_Q AC-coupled to 2k
Ω
load; IIN1+,
QIN1+, IIN2+, QIN2+ driven from 1.1k
Ω
AC-coupled source; IOUT1, QOUT1 AC-coupled to 2k
Ω
; IOUT2, QOUT2 AC-coupled to
100
Ω
; input to VGAs, 20mVp-p at 1MHz tone, set V
AGC
= 1.25V, unless otherwise noted.)
MAX2700/MAX2701