Rainbow-electronics MAX1109 Manual de usuario descargar pdf (Pagina 6)

µA

MAX1108/MAX1109

Single-Supply, Low-Power,

2-Channel, Serial 8-Bit ADCs

6 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS—MAX1109 (continued)

= +4.5V to +5.5V; unipolar input mode; COM = GND, f

SCLK

= 500kHz, external clock (50% duty cycle); 10 clocks/conversion

cycle (50ksps); 1µF capacitor at REF, external +4.096V reference at REF; T

= T

MIN

to T

MAX

; unless otherwise noted. Typical values

are at T

= +25°C.)

CS = V

pF15C

OUT

Three-State Output Capacitance

µA±0.01 ±10I

Three-State Leakage Current

Figure 1, C

LOAD

= 100pF

Figure 1, C

LOAD

= 100pF

Figure 2, C

LOAD

= 100pF

ns240t

CS Fall to Output Enable

CONDITIONS

20 200t

SCLK Fall to Output Data Valid

ns240t

CS Rise to Output Disable

ns100t

DIN to SCLK Setup Time

µs1.0t

ACQ

Acquisition Time

ns0t

DIN to SCLK Hold Time

UNITSMIN TYP MAXSYMBOLPARAMETER

SINK

= 5mA

SINK

= 16mA

0.4

V4.5 5 5.5V

Supply Voltage

0.8

Output Low Voltage

= 4.5V to 5.5V,

= 10pF,

full-scale input

130 250

Power down, V

= 4.5V to 5.5V 0.5 2.5

External reference = +4.096V,

full-scale input, V

= 4.5V to 5.5V

mV±0.4 ±4PSRPower-Supply Rejection (Note 9)

V0.2V

HYST

Input Hysteresis

V0.8V

Threshold Voltage Low

V3V

Threshold Voltage High

µA±1I

Input Current High

pF15C

Input Capacitance

SOURCE

= 0.5mA VV

- 0.5V

Output High Voltage

µA±1I

Input Current Low

µASupply Current (Notes 2, 8)

Internal reference

External reference

POWER REQUIREMENTS

DIGITAL INPUTS (DIN, SCLK, and CS)

DIGITAL OUTPUT (DOUT)

TIMING CHARACTERISTICS (Figures 8, 9, and 10)

1 2 3 4 5 6 7 8 9 10 11 ... 19 20

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Rainbow-electronics MAX1109 Manual de usuario Pagina 6

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