Rainbow-electronics MAX1205 Manual de usuario descargar pdf (Pagina 4)

MAX1205

+5V Single-Supply, 1Msps, 14-Bit

Self-Calibrating ADC

4 _______________________________________________________________________________________

= 20pF

CONDITIONS

ns187 244 301t

Clock High Time

ns488t

CLK

ns4 / f

SAMPLE

CONV

Conversion Time

Clock Period

ns16 75t

REL

Bus Relinquish Time

ns16 75t

Data Access Time

ns187 244 301t

Clock Low Time

ns70 150t

Output Delay

ns1 / f

CLK

DAV

DAV Pulse Width

ns65 145t

CLK-to-DAV Rising Edge

UNITSMIN TYP MAXSYMBOLPARAMETER

DIGITAL INPUTS AND OUTPUTS

(AV

= +5V ±5%, DV

= DRV

= +3.3V, T

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at T

= +25°C.)

SOURCE

= 200µA

IN_

= 0 or DV

CONDITIONS

4Input Capacitance

- 0.8

0.8V

Input Low Voltage

Input High Voltage

- 0.4 - 0.03

Output High Voltage

0.8CLK

VIL

CLK Input Low Voltage

- 0.8

CLK

VIH

CLK Input High Voltage

CLK

CLK Input Capacitance

±0.1 ±10I

IN_

Digital Input Current

MIN TYP MAX

SYMBOLPARAMETER

-10 ±1 +10I

CLK

Clock Input Current

±0.1 ±10I

LEAKAGE

Three-State Leakage Current

3.5C

OUT

Three-State Output Capacitance

µA

UNITS

TIMING CHARACTERISTICS

(AV

= +5V ±5%, DV

= DRV

= +3.3V, f

CLK

= 2.048MHz, T

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at

= +25°C.) (Note 1)

nst

CLK

/ 2t

ACQ

Acquisition Time

Note 1: Reference inputs driven by operational amplifiers for Kelvin-sensed operation.

Note 2: For unipolar mode, the analog input voltage V

INP

must be within 0V and V

REF

, V

INN

= V

REF

/ 2; where V

REF

= V

RFPS

- V

RFNS

For differential mode, the analog inputs INP and INN must be within 0V and V

REF

; where V

REF

= V

RFPS

- V

RFNS

. The com-

mon mode of the inputs INP and INN is V

REF

/ 2.

Note 3: Minimum and maximum parameters are not tested. Guaranteed by design.

Note 4: R

varies inversely with sample rate.

Note 5: Calibration remains valid for temperature changes within ±20°C and power-supply variations ±5%.

Note 6: All AC specifications are shown for the differential mode.

ST_CAL = 1, Figure 8

CLK

cycles

17,400t

CAL

Calibration Time

SINK

= 1.6mA 70 400V

Output Low Voltage mV

1 2 3 4 5 6 7 8 9 10 11 12

Self-Calibrating ADC 1

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Rainbow-electronics MAX1205 Manual de usuario Pagina 4

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