Automatic RF MESFET Amplifier
Drain-Current Controllers
KLUT2BASE
KLUT1BASE = 0011 0011 0011 (819d)
TLUT2BASE
TLUT1BASE
KLUT2CNFG
KLUT1CNFG = 0 0100 1xxx 1000
TLUT2CNFG
T LUT1CNFG
KLUT1 VALUE 9 = UNUSED
0xC7
0xC6
0xC5
0xC4
0xC3
0xC2
0xC1
0xC0
1.7499V
1.5936V
1.4374V
1.2811V
1.1249V
0.9686V
0.8124V
0.6561V
KLUT1BASE = 0.4999V
Figure 30. KLUT Example
KLUT1 VALUE 8
KLUT1 VALUE 7
KLUT1 VALUE 6
KLUT1 VALUE 5
KLUT1 VALUE 4
KLUT1 VALUE 3
KLUT1 VALUE 2
KLUT1 VALUE 1
KLUT1 VALUE 0
0x68
0x67
0x66
0x65
0x64
0x63
0x62
0x61
0x60
The KLUT data is stored in straight binary format.
Figure 30 details a channel 1 KLUT example with nine
entries, a range of 0.5V to 1.7V, and a step size of 256.
Assuming V REFDAC = +2.5V, the base value (819d) is
determined by the following equation:
Internally Timed Acquisitions
and Conversions
Clock Mode 00
In clock mode 00, power-up, acquisition, conversion,
and power-down are all initiated by writing to the ADC
conversion register and performed automatically using
0.5 V
2 . 5 V
x 4096 = 819 d
the internal oscillator. This is the default clock mode.
With ADCMON set to 1, the ADC sets the BUSY output
high, powers up, scans all requested channels, stores
the results in the FIFO, and then powers down. After the
scan is complete, the BUSY output is pulled low and
the results are available in the FIFO.
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