MAX11014BGTM+T【PDF 60/70 页】IC RF MESFET AMP 48-TQFN-EP

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Automatic RF MESFET Amplifier

Drain-Current Controllers

Table 28. LUT Addresses

bit threshold. Using the temperature LUT as an exam-

ple, if the HYS value is 101 (16 bits) and the latest tem-

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

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 (2 0 ) and 512

(2 9 ). Locations 1010 (2 10 ) to 1111 (2 15 ) 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 –

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

Table 28a. LUT Data Register Memory Map

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.

ADDRESS

NAME

LUTADD7–

LUTADD0

(HEX)

LUTDAT15

D15 D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

LUTDAT0

D1 D0

TLUT1

TLUT2

KLUT1

KLUT2

00 to 2F

30 to 5F

60 to 8F

90 to BF

1

1

1

1

1

1

1

1

0

0

0

0

X

X

X

X

MSB

MSB

MSB

MSB

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

LSB

LSB

LSB

LSB

TLUT1

Configuration

TLUT2

Configuration

KLUT1

Configuration

KLUT2

Configuration

C0

C1

C2

C3

1

1

1

1

1

1

1

1

0

0

0

0

See Table 28b for bit details.

See Table 28b for bit details.

See Table 28b for bit details.

See Table 28b for bit details.

TLUT1 Base

TLUT2 Base

KLUT1 Base

KLUT2 Base

C4

C5

C6

C7

1

1

1

1

1

1

1

1

0

0

0

0

X

X

X

X

MSB

MSB

MSB

MSB

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

LSB

LSB

LSB

LSB

X = Don’t care.

60

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