MAX1385 Datasheet, PDF (12/52 Pages) Maxim Integrated Products – Dual RF LDMOS Bias Controllers with I2C/SPI Interface

Dual RF LDMOS Bias Controllers
with I²C/SPI Interface
Typical Operating Characteristics (continued)
(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.)
PGAOUT_ 0mV TO 250mV
V_SENSE TRANSIENT RESPONSE
MAX1385/86 toc10
100mV/div
V_SENSE
PGAOUT_
1V/div
10µs/div
PGAOUT_ PEDESTAL ERROR
DURING CALIBRATION
MAX1385/86 toc11
2V/div
BUSY
20µs/div
PGAOUT_
10mV/div
GATE_ OFFSET COMPENSATED
ERROR vs. TEMPERATURE
0
-1
H_ERROR, AUTOCALIBRATION
-2
-3
-4 _{L_ERROR, AUTOCALIBRATION}
-5 _{H_ERROR, NO AUTOCALIBRATION}
-6
-7 L_ERROR, NO AUTOCALIBRATION
-8
-40 -25 -10 5 20 35 50 65 80
TEMPERATURE (°C)
VGATE vs. POWER-ON TIME
MAX1385/86 toc13
GATE_ SETTLING TIME
vs. LOAD CAPACITANCE
16
R_SERIES = 50Ω
14
50mV/div ₁₂
10
V_{GATE_}
8
6
4
2
400µs/div
0
0.1
1
10
100
LOAD CAPACITANCE (µF)
CHARGE CURRENT vs. VGATE
MAX1385/86 toc15
V_{GATE_}
2V/div
1ms/div
20mA/div
I_{GATE_}
10
9
8
7
6
5
4
3
2
1
0
10
GATE_ VOLTAGE SWING
vs. LOAD RESISTANCE
100
1000 10,000
LOAD RESISTANCE (Ω)
100,000
GLITCH ENERGY
MAX1385/86 toc17
10mV/div
1µs/div
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