Rainbow-electronics ATmega128L Manual de usuario descargar pdf (Pagina 316)

316

ATmega128(L)

2467B–09/01

ADC Characteristics - Preliminary Data

Note: 1. Values are guidelines only. Actual values are TBD.

2. Minimum for AV

is 2.7 V.

3. Maximum for AV

is 5.5 V.

Table 137. ADC Characteristics

Symbol Parameter Condition Min

(1)

Typ

(1)

Max

(1)

Units

Resolution Single Ended Conversion 10 Bits

Differential Conversion

Gain = 1x or 20x 8 Bits

Differential Conversion

Gain = 200x 7 Bits

Absolute accuracy

Single Ended Conversion

REF

= 4 V

ADC clock = 200 kHz

ADHSM = 0

1TBDLSB

Single Ended Conversion

REF

= 4V

ADC clock = 1 MHz

ADHSM = 1

TBD TBD LSB

Integral Non-Linearity V

REF

= 4 V 0.5 LSB

Differential Non-Linearity V

REF

= 4 V 0.5 LSB

Zero Error (Offset) V

REF

= 4 V 1 LSB

Conversion Time Free Running Conversion

ADHSM = 0

65 260 µs

Free Running Conversion

ADHSM = 1

65 TBD µs

Clock Frequency ADHSM = 0 50 200 kHz

ADHSM = 1 50 TBD kHz

Analog Supply Voltage V

- 0.3

(2)

+ 0.3

(3)

REF

Reference Voltage Single Ended Conversion 2.0 AV

Differential Conversion 2.0 AV

- 0.2 V

Input voltage Single ended channels GND V

REF

Differential channels TBD TBD

Input bandwidth Single ended channels TBD kHz

Differential channels 4 kHz

INT

Internal Voltage Reference TBD 2.56 TBD V

REF

Reference Input Resistance TBD TBD TBD kΩ

AIN

Analog Input Resistance TBD MΩ

HSM

Increased current consumption

in High-Speed Mode

(ADHSM=1)

TBD µA

1 2 ... 311 312 313 314 315 316 317 318 319 320 321 ... 330 331

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