Dual RF LDMOS Bias Controllers
with I 2 C/SPI Interface
Typical Operating Characteristics
(GATEV DD = +5.5V for the MAX1385, GATEV DD = +11V for the MAX1386, AV DD = DV DD = +5V, external V REFADC = +2.5V, external
V REFDAC = +2.5V, C REF = 0.1μF, T A = +25°C, unless otherwise noted.)
AV DD SUPPLY CURRENT
GATEV DD SUPPLY CURRENT
4.0
vs. AV DD VOLTAGE
DV DD SUPPLY CURRENT vs. DV DD VOLTAGE
4.00
5.0
vs. GATEV DD VOLTAGE
3.9
3.8
3.7
3.6
Av PGA = 2
CMV = 12V
V SENSE = 100mV
T A = +85 ° C
3.75
3.50
3.25
3.00
2.75
Av PGA = 2
CMV = 12V
V SENSE = 100mV
T A = +85 ° C
T A = +25 ° C
T A = -40 ° C
4.9
4.8
4.7
4.6
Av PGA = 2
CMV = 12V
V SENSE = 100mV T A = +85 ° C
T A = +25 ° C
3.5
3.4
T A = +25 ° C
2.50
2.25
4.5
4.4
3.3
3.2
3.1
3.0
T A = -40 ° C
2.00
1.75
1.50
1.25
1.00
4.3
4.2
4.1
4.0
T A = -40 ° C
4.7
4.8
4.9
5.0
5.1
5.2
5.3
2.7
3.2
3.7
4.2
4.7
5.2
4
5
6
7
8
9
10
11
12
AV DD (V)
TOTAL PGAOUT_ ERROR
vs. TEMPERATURE
DV DD (V)
TOTAL PGAOUT_ ERROR vs. V SENSE
GATEV DD (V)
TOTAL PGAOUT_ ERROR vs. V SENSE
0.150
0.125
0.100
0.075
0.050
0.025
0
-0.025
Av PGA = 2
CMV = 12V
V SENSE = 100mV
TRACKING
ACQUISITION
0.50
0.45
0.40
0.35
0.30
0.25
0.20
Av PGA = 2
CMV = 12V
0.5
0
-0.5
-1.0
-1.5
-2.0
Av PGA = 25
CMV = 12V
-0.050
-0.075
-0.100
-0.125
-0.150
0.15
0.10
0.05
0
-2.5
-3.0
-3.5
-4.0
-40 -25 -10
5
20
35
50
65
80
0
250
500
750
1000
1250
0
20
40
60
80
100
TEMPERATURE ( ° C)
TOTAL PGAOUT_ ERROR
V SENSE (mV)
PGAOUT_ OFFSET VOLTAGE
V SENSE (mV)
0.10
vs. COMMON-MODE VOLTAGE
200
vs. TEMPERATURE
V SENSE TRANSIENT RESPONSE
MAX1385/86 toc09
0.09
0.08
0.07
0.06
Av PGA = 2
V SENSE = 100mV
150
100
50
0
-50
Av PGA = 2
CMV = 12V
V SENSE = 100mV
TRACKING
ACQUISITION
100mV/div
V SENSE
0.05
-100
0.04
0.03
0.02
0.01
0
-150
-200
-250
-300
-350
-400
PGAOUT_
1V/div
5
10
15
20
25
30
-40 -25 -10
5
20
35
50
65
80
10 μ s/div
COMMON-MODE VOLTAGE (V)
TEMPERATURE ( ° C)
______________________________________________________________________________________
11
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