Copyright

© ANPEC Electronics Corp.

Rev. A.2 - Feb., 2017

APL6001/A

www.anpec.com.tw

10

Function Description (Cont.)

can be selected from 0x70h to 0x7Eh by the 7-bit slave

address with one R/W bit. The slave device compares

the 7-bit slave address with its address and matches.

The programmable address is selected by a voltage di-

vider R1 and R2. The ADDR pin voltage is compared with

8 addresses available internal reference voltage for ad-

dress programming.

Note: If the address programming function is not used,

address is used as default value 0x70h.

The AINx voltages are digitized directly by high precision

ages are sensed alternately and take 1.2ms every

channel.

When the VDD supply voltage range from 2.8 to 5.5V, the

A/D converter have 4.6875mV (for APL6001) or 10mV (for

APL6001A) of resolution, and 0 to 1.2V (for APL6001) or 0

to 2.56V (for APL6001A) of full scale range. The A/D con-

verter sensing results are stored in the internal register

that shows as follow:

AIN1 A/D data store (TD1): Reg0x03[7] (MSB) ~ Reg0x03

[0] (LSB)

AIN2 A/D data store (TD2): Reg0x04[7] (MSB) ~ Reg0x04

[0] (LSB)

AIN3 A/D data store (TD3): Reg0x05[7] (MSB) ~ Reg0x05

[0] (LSB)

If the internal register code is read as Code

register Reg0x03, Reg0x04 and Reg0x05 calculation as follows:

The voltage divider at VIN-R

I2C

Interface

ADDR

VDD

0x7E

0x7C

0x7A

0x78

0x76

0x74

0x72

0x70

0

20

30

40

50

60

70

80

90

100

10

ADDR Input Voltage (% of VDD)

Address

R1 (kOhm)

R2 (kOhm)

ADDR

(% of VDD)

0x70

0x72

0x74

0x76

0x78

0x7A

0x7C

0x7E

Open

0

0

5.1

2.7

35

4.3

3.6

45

3.9

4.7

55

3.6

6.8

65

2

6.2

75

1.5

8.2

85

10

Open

100

A/D

Converter

I2C

Interface

AINx

VDD

(

)

(

)

APL6001A

for

Code

10mV

V

or

10mV

V

Code

APL6001

for

Code

4.6875mV

V

or

4.6875mV

V

Code

X

AINx

AINx

X

X

AINx

AINx

X

×

=

=

×

=

=

NTCx

INx

NTCx

AINx

R

R

R

VIN

V

+

×

=

According to the above equation:

(

)

(

)

APL6001A

for

10mV

R

R

R

VIN

Code

or

APL6001

for

4.6875mV

R

R

R

VIN

Code

NTCx

INx

NTCx

X

NTCx

INx

NTCx

X

+

×

=

+

×

=

Note: If the AINx pin is not used, that must be pulled to the high level. And the C

pin.