Rainbow-electronics MAX1329 Manual de usuario descargar pdf (Pagina 4)

MAX1329/MAX1330

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

Reference, Voltage Monitors, and Temp Sensor

4 _______________________________________________________________________________________

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

Power-Down Output Leakage

Current

±100 nA

Supply Current per DAC No load (Note 3) 70 µA

INTERNAL REFERENCE (10µF capacitor at REFADC and REFDAC, 0.01µF capacitor at REFADJ)

= + 25° C , ARE F< 1:0> = D RE F< 1:0> = 01 1.225 1.250 1.275

= + 25° C , ARE F< 1:0> = D RE F< 1:0> = 10 2.007 2.048 2.089

Output Voltage at REFADC and

REFDAC

= + 25° C , ARE F< 1:0> = D RE F< 1:0> = 11 2.450 2.500 2.550

Output-Voltage Temperature

(Note 2) ±10 ±75 ppm/°C

Source 40

REFADC and REFDAC

Output Short-Circuit Current

Sink 13

REFADC and REFDAC

Line Regulation

±100 ±600 µV/V

SOURCE

= 0µA to 500µA, T

= +25°C 10

Load Regulation

SINK

= 0µA to 80µA, T

= +25°C 10

µV/µA

Long-Term Stability T

= +25°C ±100

ppm/

1000hrs

Turn-On Time At REFADJ 2 ms

Turn-Off Time 100 ns

Internal reference 445

REFADC buffer 270

Refer ence S up p l y C ur r ent ( N ote 3)

REFDAC buffer 270

µA

EXTERNAL REFERENCE AT REFADJ

AREF<1:0> = DREF<1:0> = 11 1.225V

- 0.1V

AREF<1:0> = DREF<1:0> = 10

1.496V to

- 0.1V

External Reference Input Voltage

Range

AREF<1:0> = DREF<1:0> = 01

2.450V to

- 0.1V

Input Resistance 50 75 kΩ

AREF<1:0> = 01 1

AREF<1:0> = 10 0.8192REFADC Buffer Gain

AREF<1:0> = 11 0.5

V/V

DREF<1:0> = 01 1

DREF<1:0> = 10 0.8192REFDAC Buffer Gain

DREF<1:0> = 11 0.5

V/V

Minimum Capacitive Bypass REFADJ to AGND 10 nF

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

MAX1329/MAX1330 1

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Rainbow-electronics MAX1329 Manual de usuario Pagina 4

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