Datasheet
MAX11014/MAX11015
Automatic RF MESFET Amplifier
Drain-Current Controllers
36 ______________________________________________________________________________________
Bits D15–D12 of the software configuration register are
don’t care. Set the LDAC2 bit, D11, to 1 to load the new
value of V
DAC2
, upon completion of a V
DAC2(CODE)
calculation, into both the channel 2 DAC input and out-
put registers. See Figure 20. Set to 0 to load the new
value of V
DAC2
, upon completion of a V
DAC2(CODE)
calculation, to only the channel 2 DAC input register.
Set the T2COMP1/0 bits, D10 and D9, to control the
channel 2 temperature LUT. See Table 11a. Set the
KSRC2-2/1/0 bits, D8, D7, and D6, to control the chan-
nel 2 K parameter LUT. See Table 11b and the
SRAM
LUTs
section.
Table 10b. Clock Modes
Table 10c. ADC Reference Modes
Table 10a. Maximum GATE_ Voltage Modes
CH_OCM1 CH_OCM0 FUNCTION
0 0 Maximum positive voltage at GATE_ = AGND.
0 1 Maximum positive voltage at GATE_ = AGND + 250mV.
1 0 Maximum positive voltage at GATE_ = AGND + 500mV.
1 1 Maximum positive voltage at GATE_ = AGND + 750mV.
CKSEL1 CKSEL0
CONVERSION
CLOCK
ACQUISITION/SAMPLING
0 0 Internal
Internally timed acquisitions and conversions. Default state. Begin a
conversion by writing to the ADC conversion register to convert all
channels specified in this register.
0 1 Internal
Internally timed acquisitions and conversions. Begin a conversion by
pulling CNVST low only once for at least 20ns to convert all of the
channels selected in the ADC conversion register.
1 0 Reserved Do not use.
1 1 Internal
Externally timed single acquisitions. Conversions internally timed.
Begin each individual conversion by pulling CNVST low for each
channel converted. See the Electrical Characteristics table for CNVST
timing. The MAX11014/MAX11015 acquire while CNVST is low and
sample when CNVST returns high.
ADCREF1 ADCREF0 ADC VOLTAGE REFERENCE
0 X External. Bypass REFADC with a 0.1µF capacitor to AGND.
10
Internal. Leave REFADC unconnected.
1 1 Internal. Bypass REFADC with a 0.1µF capacitor to AGND for better noise performance.
Table 10d. DAC Reference Modes
DACREF1 DACREF0 DAC VOLTAGE REFERENCE
0 X External. Bypass REFDAC with a 0.1µF capacitor to AGND.
10
Internal. Leave REFDAC unconnected.
1 1 Internal. Bypass REFDAC with a 0.1µF capacitor to AGND for better noise performance.
X = Don’t care.
X = Don’t care.