AK2559 Datasheet, PDF (2/4 Pages) Asahi Kasei Microsystems – 2ch Cathode Common LDD with Digital APC

3. Block Diagram
[AK2559]
DATAP1
DATAN1
DATA
(LV DS)
CH1
AK2559
R_BI AS1_I
R_SW1_I
SDCLK
PDMON
Common
Digital Circuit
PD
Ipd
PD
PD
Detector
vpd
Comp.
APC _{I_APCH1_I Attenuation}
R_AP C1_DAC
R_AP C2_DAC
DAC_APC
vapcref
BIAS_APC ^{I_APCH2_I Shading}
Rref
VREF
VREFBIAS
Over Current
Alarm
Oscillator
Power On
Reset
IDAC
_SW1
Isw1
IDAC
_BIAS1
Ibias1
ILD1
Parallel I/F
Mode
Control
P_ENB*
P_SEL*
P_SH*
P_CH*
P_HL*
Iop1
LD1
Serial I/F
Set-Up
CSI*
CSO
SKOI
DOI
DIO
EEPROM
(MicroWire)
CS
SK
DI
DO
DATAP2
DATAN2
CH2
DATA
(LV DS)
With Power Down Protection ^BG_FIX*
R_SW2_I
IDAC
_SW2
Isw2
R_BI AS2_I
CUALM
SET* STRT A2 A1 A0
IDAC
_BIAS2
Ibias2
ILD2
INT_ST _{*: With internal Pulled-Down Resistor}
Iop2
LD2
Figure 3.1. AK2559 Block Diagram
AK2559-E-Preliminay0.90 (Brief)
-2-
2015/7