7872 datasheet(4/11 Pages) MAXWELL

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14-Bit A/D Converter

7872

5.21.02 Rev 4

TABLE 6. 7872 DC ELECTRICAL CHARACTERISTICS FOR REFERENCE OUTPUT

DD = 5V ± 5%, VSS = -5 V ± 5%, TA = -55 TO 125 ° C UNLESS OTHERWISE SPECIFIED)

PARAMETER

SYMBOL

SUGGROUPS

MIN

MAX

UNIT

REF

OUT @ +25

°C

1, 2, 3

2.99

3.01

REF

OUT TMIN to TMAX

1, 2, 3

2.98

3.02

REF

OUT Tempco: Typically 35ppm

1, 2, 3

±40

ppm/oC

Reference Load Sensitivity (DREF

OUT/DI) Reference Load Current

Change (0-300 µ A); Reference Load Should Not Be Changed Dur-

ing Conversion

1, 2, 3

1.2

TABLE 7. 7872 DC ELECTRICAL CHARACTERISTICS FOR LOGIC INPUTS

DD = 5V ± 5%, VSS = -5 V ± 5%, TA = -55 TO 125 ° C UNLESS OTHERWISE SPECIFIED)

PARAMETER

SYMBOL

SUGGROUPS

MIN

MAX

UNIT

Input High Voltage: V

DD 5 V ± 5%

INH

1, 2, 3

2.4

Input Low Voltage: V

DD 5 V ± 5%

INL

1, 2, 3

0.8

Input Current: V

IN = 0 V to VDD

1, 2, 3

-10

µ A

Input Current: (14/8/CLK input only) VIN = VSS to VDD

1, 2, 3

-10

µ A

Input Capacitance 1

1. Not tested.

1, 2, 3

TABLE 8. 7872 DC ELECTRICAL CHARACTERISTICS FOR LOGIC OUTPUTS

DD = 5V ± 5%, VSS = -5 V ± 5%, TA = -55 TO 125 ° C UNLESS OTHERWISE SPECIFIED)

PARAMETER

SYMBOL

SUBGROUPS

MIN

MAX

UNIT

Output High Voltage I

SOURCE = 40 µ A

1, 2, 3

4.0

Output Low Voltage I

SINK = 1.6 mA

1, 2, 3

0.4

Floating-State Leakage Current

1, 2, 3

µ A

Floating-State Output Capacitance 1

1. Not tested.

1, 2, 3

TABLE 9. 7872 DC ELECTRICAL CHARACTERISTICS FOR CONVERSION TIME

DD = 5V ± 5%, VSS = -5 V ± 5%, TA = -55 TO 125 ° C UNLESS OTHERWISE SPECIFIED)

PARAMETER

SYMBOL

SUBGROUPS

MIN

MAX

UNIT

External Clock

1, 2, 3

µ s

Internal Clock: Nominal Value = 2 MHz

1, 2, 3

µ s

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