ATmega32HVB datasheet(232/273 Pages) ATMEL

232 / 273 page

232

8042A–AVR–07/09

ATmega16HVB/32HVB

32.7.2

Coulomb Counter ADC Characteristics

Notes:

1. Values based on characterization data.

2. After software offset compensation, using the polarity switching (CADPOL) feature.

3. Value includes drift over the whole temperature range.

32.8

Clock Characteristics

Notes:

1. The frequency is stored in the Value after factory calibration at 85ºC

2. Value not tested in production, but it is guarantied by design and characterization over the whole temperature range.

3. The actual oscillator frequency is measured in production and stored in the device signature row (for details, see ”Reading

the Signature Row from Software” on page 199).

Table 32-7.

A= -40 to 85°C unless otherwise noted.

Parameter

Condition

Min

Typ

Max

Unit

Conversion Time

Instantaneous conversion, clk

CC-ADC=32kHz

3.9

Accumulated conversion CADAS=11, clkCC-ADC=32kHz

Resolution

Instantaneous conversion

Bits

Accumulated conversion

Gain

Accumulated conversion, CADVSE=0

1.67

µV/LSB

Accumulated conversion, CADVSE=1

0.84

Instantaneous conversion, CADVSE=0

53.7

Instantaneous conversion, CADVSE=1

26.9

Input voltage Range

CADVSE = 0

-200

200

CADVSE = 1

-100

100

INL(1)

TA= 0°- 60°C

± 0.005

± 0.003

% FSR

Offset Error(2)

Accumulated conversion, T

A= 25°C-7

µV

Offset Error Drift(1)(2)

Accumulated conversion

nV/

°C

Gain Error(1)(3)

± 0.4

± 1

Gain Error Drift(1)

0.1

Table 32-8.

A= -40 to 85°C unless otherwise noted.

Parameter

Condition

Min

Typ

Max

Unit

Calibrated Fast RC Oscillator

Frequency

After factory calibration at

A=25°C

7.92

8.08

MHz

Frequency drift(2)

With run-time calibration with

OSI interface and Slow RC

Oscillator as calibration clock

Slow RC Oscillator(1)

Frequency(3)

131

171

kHz

Frequency drift

Frequency prediction error

0.5

Ultra Low

Power RC Oscillator(1)

Frequency(3)

128

167

kHz

Frequency drift(2)

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