DA6510.009

6 September, 2018

5 (32)

ELECTRICAL CHARACTERISTICS

Parameter

Symbol

Conditions

Min

Typ

Max

Unit

Internal offset capacitor

matrix selection

OCDACS=255

OCDACR=255

19.8

19.8

22

22

0.0863

24.2

24.2

pF

Changing sensor

capacitance range in

capacitance difference

mode

Normal clock (SOSC=00)

Division by 2 (SOSC=01)

Division by 4 (SOSC=10)

Division by 8 (SOSC=11)

2

2

2

2

20

30

30

30

pF

Maximum allowed

sensor capacitance in

capacitance difference

mode

Normal clock (SOSC=00)

Division by 2 (SOSC=01)

Division by 4 (SOSC=10)

Division by 8 (SOSC=11)

Note 1

20

40

80

160

pF

Changing sensor

capacitance range in

capacitance ratio mode

Note 2

2

20

pF

Maximum allowed

sensor capacitance in

capacitance ratio mode

Note 2

20

pF

Internal temperature

sensor

Linearity

Note 3

±0.4

°C

Slope

OSR=4096

OSR=2048

OSR=1024

OSR=512

OSR=256

65056

65038

65002

8116

1012

LSB/

°C

Non-calibrated, note 3

-4.5

+3.5

%

Offset

Non-calibrated, note 3

-12

+17

°C

Temperature resolution

Temp mode,

TEMPREGEN=1,

OSR=256

0.034

0.001

°C/

LSB

VDD voltage resolution

VDD level monitoring

TEMPREGEN=0

OSR=256

Note 4

123

Note 1. In capacitance difference mode the maximum allowed sensor and reference capacitor values can be extended further using lower

Note 2. In capacitance ratio mode also larger capacitances are possible depending on sensor characteristics. Please contact Micro Analog

Systems to check sensor suitability.

Note 3. Guaranteed by design. By first order calibration of offset and slope an overall temperature accuracy close to the linearity accuracy can

be achieved. Further accuracy can be achieved by second order calibration to reduce non-linearity errors. Minimum and maximum values of

temperature sensor gain and offset are guaranteed by design.

Note 4. In case of noisy power supply the VDD level monitoring resolution can be further limited by supply noise.