User Manual

MAX11008
Dual RF LDMOS Bias Controller with
Nonvolatile Memory
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
CS_+
= +32V, AV
DD
= DV
DD
= +5V ±5%, external V
REFADC
= +2.5V, external V
REFDAC
= +2.5V, C
REF
= 0.1µF, C
GATE_
= 0.1nF,
V
SENSE
= V
CS_+
- V
CS_-
, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
MONITOR ADC CONVERSION RATE
Power-Up Time (External
Reference)
t
PUEXT
1.1 µs
Power-Up Time (Internal
Reference)
t
PUINT
70 µs
Acquisition Time t
ACQ
0.5 µs
Conversion Time t
CONV
Internally clocked, T
A
= +25°C 10 µs
Aperture Delay t
AD
20 ns
MONITOR ADC ANALOG INPUT (ADCIN1, ADCIN2)
Input Voltage Range V
ADCIN
Relative to AGND (Note 7) 0 V
REFADC
V
Input Leakage Current V
IN
= 0 and V
IN
= V
AV
DD
±0.01 µA
Input Capacitance C
ADCIN
34 pF
TEMPERATURE MEASUREMENTS
T
A
= +25°C ±0.25
Internal Sensor Measurement
Error
T
A
= T
MIN
to T
MAX
(Note 8) ±1.5 ±3
°C
T
A
= +25°C ±1
External Sensor Measurement
Error (Note 9)
T
A
= T
MIN
to T
MAX
±3
°C
Relative Temperature Accuracy T
A
= T
MIN
to T
MAX
(Note 9) ±0.4 °C
Temperature Resolution 1/8 °C/LSB
E xter nal D i od e D r i ve C ur r ent ( Low ) 3.25 4 µA
E xter nal D i od e D r i ve C ur r ent ( H i g h) 68 75 µA
INTERNAL REFERENCE
REFADC/REFDAC Output
Voltage
V
REFADC
,
V
REFDAC
T
A
= +25°C 2.49 2.50 2.51 V
REFADC/REFDAC Temperature
Coefficient
TC
REFADC
,
TC
REFDAC
±15 ppm/°C
REFADC/REFDAC Output
Impedance
6.5 kΩ
Capacitive Bypass at
REFADC/REFDAC
270 pF
Power-Supply Rejection Ratio PSRR AV
DD
= 5V ± 5% 64 dB
EXTERNAL REFERENCE
REFADC Input Voltage Range V
REFADC
1.0 AV
DD
V
V
REFADC
= 2.5V, f
SAMPLE
= 100ksps 60 80
REFADC Input Current I
REFADC
Acquisition/between conversions ±0.01
µA
REFDAC Input Voltage Range V
REFDAC
0.7 2.5 V
REFDAC Input Current S tati c cur r ent w hen the D AC i s not cal i b r ated 0.1 µA