MAX11014_08 Datasheet, PDF (60/70 Pages) Maxim Integrated Products – Automatic RF MESFET Amplifier Drain-Current Controllers

Automatic RF MESFET Amplifier
Drain-Current Controllers
Table 28. LUT Addresses
LUTADD7–LUTADD0
0000 0000 to 0010 1111
0011 0000 to 0101 1111
0110 0000 to 1000 1111
1001 0000 to 1011 1111
1100 0000
1100 0001
1100 0010
1100 0011
1100 0100
1100 0101
1100 0110
1100 0111
HEX
00 to 2F
30 to 5F
60 to 8F
90 to BF
C0
C1
C2
C3
C4
C5
C6
C7
FUNCTION
TLUT1-0 to TLUT1-47
TLUT2-0 to TLUT2-47
KLUT1-0 to KLUT1-47
KLUT2-0 to KLUT2-47
TLUT1 configuration
TLUT2 configuration
KLUT1 configuration
KLUT2 configuration
TLUT1 base
TLUT2 base
KLUT1 base
KLUT2 base
When performing a write operation, the first 3 LUTDAT
bits, D15, D14, and D13 are don’t care. When perform-
ing a read operation, these bits are set to the LUT data
channel tag 110. Bits D12–D7 set the size of the LUT in
binary format. Set the LUT size between 8 (001000)
and 48 (110000). Bits D6, D5, and D4 set the hysteresis
bit threshold. Using the temperature LUT as an exam-
ple, if the HYS value is 101 (16 bits) and the latest tem-
perature measurement differs from the last one by more
than 2°C, a new TLUT operation is performed and a
new TLUT value is calculated. Bits D3–D0 set the LUT
step size. See Table 28c. The step size is based on the
value of 2^N, with N equaling the digital value of the
STEP bits. Set the step size between 1 (2⁰) and 512
(2⁹). Locations 1010 (2¹⁰) to 1111 (2¹⁵) are reserved.
Do not write to these locations.
LUT Base
The following two-step sequence determines the
respective channel’s temperature or KLUT base value:
1) Set the LUTADD bits in the LUT address register to
C4h (TLUT1), C5h (TLUT2), C6h (KLUT1) and C7h
(KLUT2). See Table 28d.
2) Write to the LUT data register (LUTDAT15–
LUTDAT0) to initialize the base word. The KLUT
base value is stored in binary format, with the LSB
equaling 1. The TLUT base value is stored in two’s-
complement format, with the LSB equaling
+0.125°C.
Table 28a. LUT Data Register Memory Map
ADDRESS
NAME
LUTADD7– _LUTDAT15
LUTADD0
(HEX)
D15 D14
D13
D12
D11
LUTDAT0
D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
TLUT1
00 to 2F
1
1
0
X MSB — — — — — — — — — — LSB
TLUT2
30 to 5F
1
1
0
X MSB — — — — — — — — — — LSB
KLUT1
60 to 8F
1
1
0
X MSB — — — — — — — — — — LSB
KLUT2
90 to BF
1
1
0
X MSB — — — — — — — — — — LSB
TLUT1
Configuration
C0
1
1
0
See Table 28b for bit details.
TLUT2
Configuration
C1
1
1
0
See Table 28b for bit details.
KLUT1
Configuration
C2
1
1
0
See Table 28b for bit details.
KLUT2
Configuration
C3
TLUT1 Base
C4
TLUT2 Base
C5
KLUT1 Base
C6
KLUT2 Base
C7
1
1
0
See Table 28b for bit details.
1
1
0
X MSB — — — — — — — — — — LSB
1
1
0
X MSB — — — — — — — — — — LSB
1
1
0
X MSB — — — — — — — — — — LSB
1
1
0
X MSB — — — — — — — — — — LSB
X = Don’t care.
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