Rainbow-electronics MAX1329 Manual de usuario descargar pdf (Pagina 6)

MAX1329/MAX1330

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

Reference, Voltage Monitors, and Temp Sensor

6 _______________________________________________________________________________________

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

Temperature Resolution V

REFADC

= 2.5V 1/8 °C/LSB

External-Diode Drive Ratio I

DRIVEMIN

= 4µA, I

DRIVEMAX

= 68µA 17:1

Temperature-Sensor Supply

Current

Not including ADC current (Note 3) 100 µA

Temperature-Sensor Conversion

Time

307 clocks per measurement, master clock

= 5.00MHz

65 µs

CHARGE PUMP

Input Voltage DV

1.8 3.6 V

= 1.8V to 3.0V, VM2CP<2:0> = 001 2.85 3.0 3.20

= 2.2V to 3.6V, VM2CP<2:0> = 010 3.75 4.0 4.30

No-Load Output Voltage AV

= 2.7V to 3.6V, VM2CP<2:0> = 011 4.80 5.0 5.40

Output Current Including internal current (Table 32) 25 mA

No-Load Supply Current DV

= 2.7V, AV

= 4V, 39kHz clock 250 µA

Switching Frequency 39 78 kHz

Switch Turn-On/-Off Time Between DV

to AV

charge pump off 40 ns

Switch Impedance Shorts DV

to AV

, charge pump off 25 50 Ω

Efficiency

25mA load, DV

= 1.8V, AV

= 3.0V,

39kHz clock

80 %

VOLTAGE MONITOR (VM1)

Supply Voltage Range 1.0 3.6 V

VM1<1:0> = 0x, RST1 input 1.80 1.865 1.93

Trip Threshold (DV

Falling) V

DTH

VM1<1:0> = x0, RST2 input 2.65 2.750 2.90

VM1<1:0> = 0x, RST1 input 15

Hysteresis V

DHYS

VM1<1:0> = x0, RST2 input 22.5

Reset Timeout Period V

DVDD

= V

DTH

+ V

DHYS

170 ms

Turn-On Time DV

= 1.8V, enabled by VM1 <1:0> 2 ms

VOLTAGE MONITOR (VM2)

Supply Voltage Range 1.0 5.5 V

VM2CP<1:0> = 01 2.53 2.775 2.975

VM2CP<1:0> = 10 3.4 3.700 3.925

Trip Threshold (AV

Falling)

(Note 6)

ATH

VM2CP<1:0> = 11 4.25 4.625 4.925

VM2CP<1:0> = 01 22.5

VM2CP<1:0> = 10 30

Hysteresis V

AHYS

VM2CP<1:0> = 11 37.5

1 2 3 4 5 6 7 8 9 10 11 ... 77 78

MAX1329/MAX1330 1

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Rainbow-electronics MAX1329 Manual de usuario Pagina 6

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