AK9750 Datasheet, PDF (36/49 Pages) Asahi Kasei Microsystems – IR Sensor IC with I2C I/F

[AK9750]
10). ETH13H, ETH24H, ETH12L, ETH24L: Threshold level setting for the differential outputs
(IR1 - IR3 / IR2 - IR4) (Read / Write Registers)
Address Name
D7
D6
D5
D4
D3
D2
D1
11H ETH13H TEH13H_4 TEH13H_3 ETH13H_2 ETH13H_1 ETH13H_0
0
0
12H ETH13H
0
ETH13H_11 ETH13H_10 ETH13H_9 ETH13H_8 ETH13H_7 ETH13H_6
13H ETH13L ETH13L_4 ETH13L_3 ETH13L_2 ETH13L_1 ETH13L_0
0
0
14H ETH13L
0
ETH13L_11 ETH13L_10 ETH13L_9 ETH13L_8 ETH13L_7 ETH13L_6
15H ETH24H ETH24H_4 ETH24H_3 ETH24H_2 ETH24H_1 ETH24H_0
0
0
16H ETH24H
0
ETH24H_11 ETH24H_10 ETH24_9 ETH24H_8 ETH24H_7 ETH24H_6
17H ETH24L ETH24L_4 ETH24L_3 ETH24L_2 ETH24L_1 ETH24L_0
0
0
18H ETH24L
0
ETH24L_11 ETH24L_10 ETH24L_9 ETH24L_8 ETH24L_7 ETH24L_6
Reset
0
0
0
0
0
0
0
D0
0
ETH13H_5
0
ETH13L_5
0
ETH24H_5
0
ETH13L_5
0
Threshold Level setting for the differential output (IR1 - IR3 / IR2 - IR4)
TH13H [11:0], TH24H [11:0]: Upper Threshold Level setting for the differential output (IR1 - IR3 / IR2 - IR4)
TH13L [11:0], TH24L [11:0]: Lower Threshold Level setting for the differential output (IR1 - IR3 / IR2 - IR4)
The setting range is shown in Table 14.5.
Table 14.5. Threshold Level setting for the differential output (IR1 - IR3 / IR2 - IR4)
Threshold level [11:0]
Two’s Complement
Hex
Decimal
Differential Current Output Unit
0111 1111 1111
7FF
2047
7139.32
⁞
⁞
⁞
⁞
0000 0000 0001
001
1
3.4877
0000 0000 0000
000
0
0
pA
1111 1111 1111
FFF
-3.4877
⁞
⁞
⁞
⁞
1000 0000 0000
800
-2048
-7142.81
Differential current output is calculated by the following formula,
Differential current output = 3.4877 x Threshold level [11:0](Decimal) pA
Note:
* 17. The threshold levels should be set as “ETH13H > ETH13L, ETH24H > ETH24L”. Otherwise, AK9750
cannot operate normally.
015002896-E-01
- 36 -
2015/10