Rainbow-electronics DS1870 Uživatelský manuál stáhnout pdf (Strana 9)

DS1870

LDMOS RF Power-Amplifier Bias

Controller

_____________________________________________________________________ 9

Functional Diagram

∑

∑

+

+

+

+

∑

++

M

U

X

13-BIT

ADC

ON-CHIP

TEMP SENSOR

V

CC

V

D

I

D1

I

D2

ADDRESS

GENERATION

SDA

SCL

A

0

A

1

A

2

I

2

C DATA BUS

32 BYTES

USER

MEMORY

OFFSET

CALIBRATION

REGISTERS

FAULT

LOAD

INDEX

INDEX

INDEX

INDEX

LOAD

TEMP

POT1

R

POT

POT2

R

POT

H

COM

L

2

W

2

W

1

L

1

POT1

DRAIN

LUT

TABLE 4

(64 BYTES)

POT2

DRAIN

LUT

TABLE 5

(64 BYTES)

LIMIT

COMPARATOR

LIMIT FLAG

REGISTERS

FAULT

MASK

V

CC

V

CC

GND

GAIN

CALIBRATION

REGISTERS

V

D

VD1

VD2

V

D

I

D2

I

D1

POT1

TEMP

LUT

TABLE 2

(72 BYTES)

POT2

TEMP

LUT

TABLE 3

(72 BYTES)

R

S

R

S

I

2

C INTERFACE

CONTROL

HI AND LO

LIMITS FOR

TEMP, V

CC

,

V

D

, I

D1

, I

D2

MEASURED

VALUES FOR

TEMP, V

CC

,

V

D

, I

D0

, I

D1

DS1870

1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... 27 28

Controller 1

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