Rainbow Electronics DS1870 - Manual (Page 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