Datasheet

MAX11014/MAX11015
Automatic RF MESFET Amplifier
Drain-Current Controllers
46 ______________________________________________________________________________________
For maximum accuracy, power up all internal blocks
prior to a calibration (MAX11014). The MAX11015 does
not require the current-sense amplifier to be powered
up for a calibration.
LDAC (Write)
Write to the software load DAC register to load the val-
ues stored in the DAC input registers to their respective
DAC output registers. Set the command byte to 66h to
write to the software load DAC register. See Table 21.
Bits D15–D2 are don’t care.
Set the DACCH2 bit, D1, to 1 to load the channel 2
DAC output register with the value stored in the chan-
nel 2 DAC input register. Set the DACCH1 bit, D0, to 1
to load the channel 1 DAC output register with the
value stored in the channel 1 DAC input register. See
Figure 20.
Table 19. ADCCON (Write)
BIT NAME DATA BIT
RESET STATE
FUNCTION
X D15–D12 X Don’t care.
CONCONV D11 0
Set to 1 to command continuous ADC conversions. The ADCMON bit in
the hardware configuration register must be to set to 1 to load ADC
results into the FIFO. Continuous conversions are only applicable in clock
modes 00 and 01. When CONCONV is set to 1, the ADC continuously
converts the channels selected by the ADC conversion register using the
conversion mode selected by the CKSEL1/CKSEL0 bits. Results are
accumulated in the FIFO. Empty the FIFO quickly enough to prevent
overflow conditions.
CH10 D10 0
Set to 1 to convert the ADCIN2 voltage in the next ADC conversion cycle.
CH9 D9 0
Set to 1 to convert the GATE2 voltage in the next ADC conversion cycle.
Also, the PD2-3 bit in the shutdown register must be set to 0.
CH8 D8 0
Set to 1 to convert the channel 2 DAC code in the next ADC conversion
cycle.
CH7 D7 0
Set to 1 to convert the channel 2 sense voltage in the next ADC
conversion cycle.
CH6 D6 0
Set to 1 to convert the channel 2 external temperature-sensor
measurement in the next ADC conversion cycle.
CH5 D5 0
Set to 1 to convert the ADCIN1 voltage in the next ADC conversion cycle.
CH4 D4 0
Set to 1 to convert the GATE1 voltage in the next ADC conversion cycle.
Also, the PD1-3 bit in the shutdown register must be set to 0.
CH3 D3 0
Set to 1 to convert the channel 1 DAC code in the next ADC conversion
cycle.
CH2 D2 0
Set to 1 to convert the channel 1 sense voltage in the next ADC
conversion cycle.
CH1 D1 0
Set to 1 to convert the channel 1 external temperature sensor
measurement in the next ADC conversion cycle.
CH0 D0 0
Set to 1 to convert the internal temperature sensor measurement in the
next ADC conversion cycle.