Rainbow-electronics DS1870 Bedienungsanleitung PDF herunterladen (Seite 5)

DS1870

LDMOS RF Power-Amplifier Bias

Controller

_____________________________________________________________________ 5

AC ELECTRICAL CHARACTERISTICS

= +4.5V to 5.5V, T

= -40°C to +95°C, timing referenced to V

IL(MAX)

and V

IH(MIN)

.) (Figure 3)

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX

UNITS

SCL Clock Frequency f

SCL

(Note 7) 0 400 kHz

Bus Free Time Between Stop and

Start Conditions

BUF

1.3 µs

Hold Time (Repeated) Start

Condition

HD:STA

0.6 µs

Low Period of SCL t

LOW

1.3 µs

High Period of SCL t

HIGH

0.6 µs

Data Hold Time

HD:DAT

0 0.9 µs

Data Setup Time

SU:DAT

100 ns

Start Setup Time t

SU:STA

0.6 µs

SDA and SCL Rise Time t

(Note 8)

20 +

0.1C

300 ns

SDA and SCL Fall Time t

(Note 8)

20 +

0.1C

300 ns

Stop Setup Time

SU:STO

0.6 µs

SDA and SCL Capacitive

(Note 8) 400 pF

EEPROM Write Time t

(Note 9) 10 20 ms

NONVOLATILE MEMORY CHARACTERISTICS

= +4.5V to 5.5V, T

= 0°C to +70°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Writes +70°C (Note 5)

50,000

Note 1: All voltages referenced to ground.

Note 2: Supply current is measured with all logic inputs at their inactive state (SDA = SCL = V

) and driven to well-defined logic

levels. All outputs are disconnected.

Note 3: Absolute linearity is the difference of measured value from expected value at the DAC position. Expected value is a

straight line from measured minimum position to measured maximum position.

Note 4: Relative linearity is the deviation of an LSB DAC setting change vs. the expected LSB change. Expected LSB change is

the slope of the straight line from measured minimum position to measured maximum position.

Note 5: This parameter is guaranteed by design.

Note 6: See Figure 1.

Note 7: I

C interface timing shown is for fast-mode (400kHz) operation. This device is also backward compatible with I

C stan-

dard-mode timing.

Note 8: C

—total capacitance of one bus line in picofarads.

Note 9: EEPROM write begins after a stop condition occurs.

1 2 3 4 5 6 7 8 9 10 ... 27 28

Controller 1

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