Rainbow-electronics MAX1329 Manual do Utilizador descarregar pdf (Página 5)

MAX1329/MAX1330

12-/16-Bit DASs with ADC, DACs, DPIOs, APIOs,

Reference, Voltage Monitors, and Temp Sensor

_______________________________________________________________________________________ 5

ELECTRICAL CHARACTERISTICS (continued)

(DV

= 1.8V to 3.6V, AV

= 2.7V to 5.5V, V

REFDAC

= V

REFADC

= 2.5V, external reference; 10µF capacitor at REFADC and REFDAC;

0.01µF capacitor at REFADJ; T

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at T

= +25°C.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

EXTERNAL REFERENCE AT REFADC

External Reference Input Voltage

Range

AGND AV

REFADC Input Resistance 50 75 kΩ

REFADC Input Current V

REFADC

= 2.5V, 300ksps 30 40 µA

Turn-On Time REFADC buffer, C

REFADC

= 1µF 75 µs

Shutdown REFADC Input Current 0.01 1.0 µA

Minimum Capacitive Bypass REFADC to AGND 10 µF

EXTERNAL REFERENCE AT REFDAC

REFDAC Input Voltage Range AGND AV

MAX1329 64 90 180

REFDAC Input Resistance

MAX1330 128 180 360

kΩ

MAX1329, V

REFDAC

= 2.5V 28 86

REFDAC Input Current

MAX1330, V

REFDAC

= 2.5V 14 43

µA

Turn-On Time REFDAC buffer 75 µs

Shutdown REFDAC Input Current 0.1 1 µA

Minimum Capacitive Bypass REFDAC to AGND 10 µF

MULTIPLEXER

Absolute Input Voltage Range AGND AV

Absolute Input Leakage Current

( AG N D + 100m V ) < V

A IN _

< ( AV

D D

- 100m V )

( N ote 2)

±0.01 ±1 nA

ADC gain = 1, 2 24

Input Capacitance

ADC gain = 4, 8 48

On Resistance 340 Ω

INTERNAL TEMPERATURE SENSOR

= +25°C ±0.25

Internal Sensor Measurement

Error ( N ote 5)

= -40°C to +85°C ±3

°C

= +25°C ±0.4

= 0°C to +70°C ±2

External Sensor Measurement

Error ( N ote 5)

= -40°C to +85°C ±3

°C

1 2 3 4 5 6 7 8 9 10 ... 77 78

MAX1329/MAX1330 1

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