Rainbow-electronics MAX5821 Manual do Utilizador descarregar pdf (Página 3)

MAX5822

Dual, 12-Bit, Low-Power, 2-Wire, Serial

Voltage-Output DAC

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

= +2.7V to +5.5V, GND = 0, V

REF

= V

, R

= 5kΩ, C

= 200pF, T

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are

at V

= +5V, T

= +25°C.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Input Hysteresis

0.05

Input Leakage Current Digital inputs = 0 or V

±0.1 ±1µA

Input Capacitance 6pF

DIGITAL OUTPUT (SDA)

Output Logic Low Voltage V

SINK

= 3mA 0.4 V

Three-State Leakage Current I

Digital inputs = 0 or V

±0.1 ±1µA

Three-State Output Capacitance 6pF

DYNAMIC PERFORMANCE

Voltage-Output Slew Rate SR 0.5 V/µs

Voltage-Output Settling Time

To 1/2LSB code 400 hex to C00 hex or

C00 hex to 400 hex (Note 5)

412µs

Digital Feedthrough Code = 000 hex, digital inputs from 0 to V

0.2 nV-s

Digital-to-Analog Glitch Impulse

Major carry transition (code = 7FF hex to 800

hex and 800 hex to 7FF hex)

12 nV-s

DAC to DAC Crosstalk 2.4 nV-s

POWER SUPPLIES

Supply Voltage Range V

2.7 5.5 V

All digital inputs at 0 or V

= 3.6V 115 205 µA

Supply Current with No Load I

All digital inputs at 0 or V

= 5.5V 135 215

Power-Down Supply Current I

DDPD

All digital inputs at 0 or V

= 5.5V 0.3 1 µA

TIMING CHARACTERISTICS (FIGURE 1)

Serial Clock Frequency f

SCL

0 400 kHz

Bus Free Time Between STOP

and START Conditions

BUF

1.3 µs

START Condition Hold Time t

STA

0.6 µs

SCL Pulse Width Low t

LOW

1.3 µs

SCL Pulse Width High t

HIGH

0.6 µs

Repeated START Setup Time t

STA

0.6 µs

Data Hold Time t

DAT

00.9µs

Data Setup Time t

DAT

100 ns

SDA and SCL Receiving

Rise Time

(Note 5) 0 300 ns

SDA and SCL Receiving

Fall Time

(Note 5) 0 300 ns

SDA Transmitting Fall Time t

(Note 5)

20 +

0.1C

250 ns

1 2 3 4 5 6 7 8 ... 12 13

Voltage-Output DAC 1
Voltage Output DAC 13

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