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componentes Descripción

Fabricante

AK9844A

4Kbit EEPROM with 4ch 8bit D/A Converter

Asahi Kasei Microdevices 

ASAHI KASEI

[AK9844A]

2) DAC section

( 2.7V ≤ VCC ≤ 5.5V, GND=0V, -40°C ≤ Ta ≤ 85°C, unless otherwise specified )

Parameter

Symbol

Condition

Min.

D/A Reference Voltage

A0, A1 VREF1

2.7

A2, A3 VREF2

2.7

D/A Reference Current IREF

VREF=5.0V

Resolution

Monotonicity

Differential Non-Linearity DNL

VCC=VREF=5.0V

-1

Integral Non-Linearity

NL

1LSB=VREF/256

-1.5

(Note7)

IAO=0.0µA

Error for Input data "00" EZERO CL=100pF

(Note6)

Error for Input data "FF" EFULL

(Note6)

Buffer-AMP Output

VAO1 |IAO| = 0µA

0.1

Voltage Range(1)

3.6V ≤ VCC ≤ 5.5V

VAO2 |IAO| ≤ 200µA

0.2

(Note8) VAO3 |IAO| ≤ 1mA

0.3

Buffer-AMP Output

VAO4 |IAO| = 0µA

0.1

Voltage Range(2)

2.7V ≤ VCC < 3.6V

VAO5 |IAO| ≤ 500µA

0.3

Setup Time in

tARS

500

AUTO READ

D/A Settling Time

tLDD1 3.6V ≤ VCC ≤ 5.5V

(CL=100pF) tLDD2 2.7V ≤ VCC < 3.6V

Typ. Max. Unit

VCC V

VCC V

200

400 µA

8

bit

0

+1

LSB

0

+1.5 LSB

+0.1

V

+0.1

V

VCC-0.1 V

VCC-0.2 V

VCC-0.3 V

VCC-0.1 V

VCC-0.3 V

µs

100

200

µs

400 µs

Note6: Please refer to the Figure 2.

Note7: Integral Non-Linearity is the error between the actual line and the ideal line. The

ideal line exhibits a perfect linear DAC output characteristics between the input

digital data "00" and the input digital data "FF".

Note8: VCC=VREF

* Please refer to "Instruction and Data Format" regarding the relation between input digital data

and DAC output voltage.

DAC Output Voltage

5.0V

VCC=VREF=5V

CL=100pF

EZERO

00

5.0V

EFULL

FF

DAD05E-00

00

FF

Input digital data

Figure 2. DAC output characteristics (IAO=0.0µA)

- 14 -

2005/03

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