
Automatic RF MESFET Amplifier
Drain-Current Controllers
ELECTRICAL CHARACTERISTICS (continued)
(V GATEVSS = V AVSS = -5.5V to -4.75V, V AVDD = +4.75V to +5.25V, V DVDD = +2.7V to V AVDD , external V REFADC = +2.5V, external
V REFDAC = +2.5V, C REFADC = C REFDAC = 0.1μF, V OPSAFE1 = V OPSAFE2 = 0, V RCS1+ = V RCS2+ = +5V, C FILT1 = C FILT3 = 1nF, C FILT2 =
C FILT4 = 1nF, V AGND = V DGND = 0, V ADCIN0 = V ADCIN1 = 0, V ACLAMP1 = V ACLAMP2 = -5V, T J = T MIN to T MAX , unless otherwise noted.
All typical values are at T J = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
ADC DYNAMIC ACCURACY (1kHz sine-wave input, -0.5dB from full scale, 94.4ksps)
Signal-to-Noise Plus Distortion
SINAD
70
dB
Total Harmonic Distortion
Spurious-Free Dynamic Range
Intermodulation Distortion
Full-Power Bandwidth
Full-Linear Bandwidth
THD
SFDR
IMD
Up to the 5th harmonic
f IN1 = 9.9kHz, f IN2 = 10.2kHz
-3dB point
S / (N + D) > 68dB
-84
86
76
1
100
dB
dB
dB
MHz
kHz
ADC CONVERSION RATE
Power-Up Time
Acquisition Time (Note 3)
Conversion Time
Aperture Delay
t PU
t ACQ
t CONV
External reference
Internal reference
GATE_ and sense voltage measurements
All other measurements
Internally clocked
40
1.5
0.8
50
30
6.5
μs
μs
μs
ns
ADCIN1, ADCIN2 INPUTS
Input Range
Input Leakage Current
Input Capacitance
V ADCIN_
C ADCIN_
Relative to AGND (Note 7)
V ADCIN_ = 0V or V AVDD
0
±0.01
34
V REFADC
±1
V
μA
pF
TEMPERATURE MEASUREMENTS
Internal Sensor Measurement
Error
External Sensor Measurement
Error (Note 8)
Temperature Resolution
External Diode Drive
T J = +25°C
T J = -40°C to +85°C (Note 3)
T J = -40°C to +105°C (Note 3)
T J = +25°C
T J = -40°C to +105°C
3.26
±0.25
±1.0
±1.0
±1.0
±3
0.125
±2.5
±3.5
75.00
°C
°C
°C/LSB
μA
External Temperature Sensor
Drive Current Ratio
INTERNAL REFERENCE
16.6
Reference Output Voltage
V REFADC = V REFDAC , T J = +25°C
+2.490
+2.500
+2.510
V
Reference Output Temperature
Coefficient
Reference Output Impedance
±15
6.5
ppm/ o C
k Ω
Power-Supply Rejection Ratio
PSRR
V AVDD = +5V ±5%
-83
dB
4
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