FDC1004

SNOSCY5B – AUGUST 2014 – REVISED APRIL 2015

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7.5 Electrical Characteristics

(1)

PARAMETER

TEST CONDITION

UNIT

POWER SUPPLY

Supply current

Conversion mode; Digital input to

750

950

µA

VDD or GND

Standby; Digital input to VDD or

29

70

µA

GND

CAPACITIVE INPUT

ICR

Input conversion range

±15

pF

Max input offset capacitance

per channel, Series resistance at

100

pF

CINn n=1.4 = 0

Ω

RES

16

bit

EON

Output noise

33.2

aF/

√Hz

ERR

Absolute error

after offset calibration

±6

fF

Offset deviation over temperature

-40°C < T < 125°C

46

fF

Gain error

0.2

%

tcG

Gain drift vs. temperature

-40°C < T < 125°C

-37.5

ppm/°C

PSRR

DC power supply rejection

13.6

fF/V

mode (channel vs GND)

CAPDAC

Full-scale range

96.9

pF

-40°C < T < 125°C

30

fF

DAC

EXCITATION

ƒ

Frequency

25

kHz

AC voltage across capacitance

2.4

Vpp

Average DC voltage across

1.2

V

capacitance

SHIELD

DRV

Driver capability

ƒ = 25 kHz, SHLDn to GND, n = 1,2

400

pF

(1)

Electrical Characteristics Table values apply only for factory testing conditions at the temperature indicated. Factor testing conditions

result in very limited self-heating of the device such that TJ=TA. No guarantee of parametric performance is indicated in the electrical

tables under conditions of internal self-heating where TJ>TA. Absolute Maximum Ratings indicate junction temperature limits beyond

which the device may be permanently degraded, either mechanically or electrically.

(2)

Limits are ensured by testing, design, or statistical analysis at 25Degree C. Limits over the operating temperature range are ensured

through correlations using statistical quality control (SQC) method.

(3)

Typical values represent the most likely parametric norm as determined at the time of characterization. Actual typical values may vary

over time and will also depend on the application and configuration. The typical values are not tested and are not guaranteed on

shipped production material.

(4)

Effective resolution is the ratio of converter full scale range to RMS measurement noise.

(5)

No external capacitance connected.

7.6 I

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Input high voltage

V

Input low voltage

V

Output low voltage

Sink current 3 mA

0.4

V

HYS

V

(1)

This parameter is specified by design and/or characterization and is not tested in production.

6

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