MAX11014 Datasheet, PDF (61/69 Pages) Maxim Integrated Products – Automatic RF MESFET Amplifier Drain-Current Controllers

Automatic RF MESFET Amplifier
Drain-Current Controllers
Table 28b. LUT Configuration
BIT NAME
SIZE5
SIZE4
SIZE3
SIZE2
SIZE1
SIZE0
DATA BIT
D12
D11
D10
D9
D8
D7
HYS2
D6
HYS1
D5
HYS0
D4
STEP3
D3
STEP2
D2
STEP1
D1
STEP0
D0
RESET
0
0
0
0
0
0
0
0
0
0
0
0
0
FUNCTION
The SIZE field is a straight binary representation of the size of the respective LUT.
SIZE5 is the MSB of the 6 SIZE bits. SIZE0 is the LSB. Set the size of the LUT between
eight entries (001000) and 48 entries (110000).
The HYS2, HYS1, and HYS0 bits set the hysteresis bit threshold for each LUT. When
the difference between the last index value and the next index value is less than the
value set by HYS2, HYS1, and HYS0 bits, the LUT operation for that parameter is
omitted and the last value calculated for the respective LUT is used.
Set the HYS2 (MSB), HYS1, and HYS0 (LSB) bits to the following hysteresis bit values:
000: 0 bits (a new LUT operation is always performed)
001: 1 bit (if the value differs by 1 bit, a new LUT operation is performed)
010: 2 bits
011: 4 bits
100: 8 bits
101: 16 bits
110: 32 bits
111: 64 bits
The STEP3–STEP0 bits determine the LUT 12-bit step size. The step size is a 2^N value.
The N value is determined by the STEP bits, with STEP3 being the MSB and STEP0
the LSB. See Table 28c for the TLUT and KLUT step-size equivalents.
Table 28c. LUT Configuration Step Sizes
STEP3
STEP2
STEP1
STEP0
LUT STEP SIZE
0
0
0
0
1
0
0
0
1
2
0
0
1
0
4
0
0
1
1
8
0
1
0
0
16
0
1
0
1
32
0
1
1
0
64
0
1
1
1
128
1
0
0
0
256
1
0
0
1
512
1
0
1
0
1
0
1
1
1
1
0
0
1
1
0
1
1
1
1
0
1
1
1
1
TLUT STEP-SIZE
EQUIVALENT
+0.125°C
+0.25°C
+0.5°C
+1°C
+2°C
+4°C
+8°C
+16°C
+32°C
+64°C
Reserved. Do not use.
Reserved. Do not use.
Reserved. Do not use.
Reserved. Do not use.
Reserved. Do not use.
Reserved. Do not use.
KLUT STEP-SIZE
EQUIVALENT
1
2
4
8
16
32
64
128
256
512
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