AK2557 Datasheet, PDF (2/4 Pages) Asahi Kasei Microsystems – 4ch Cathode Common LDD with Digital APC

3. Block Diagram
[AK2557]
DATAP1
DATAN1
DATA
(LVDS)
CH1
AK2557
R_BIAS1_I
R_SW1_I
SDCLK
PDMON
Common
Digital Circuit
PD
Ipd
PD
PD
Detector
vpd
Comp.
APC
I_APCH1_I Attenuation
R_APC1_DAC
R_APCx_DAC
DAC_APC
vapcref
BIAS_APC ^I_APCHx_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_CH1*
P_CH0*
P_HL*
Iop1
LD1
Serial I/F
Set-Up
CSI*
CSO
SKOI
DOI
DIO
EEPROM
(MicroWire)
CS
SK
DI
DO
DATAPx
DATANx
CHx (x=2, 3, 4)
DATA
(LVDS)
With Power Down Protection
BG_FIX*
R_SWx_I
IDAC
_SWx
Iswx
R_BIASx_I
IDAC
_BIASx
Ibiasx
ILDx
Ildx
LDx
CUALM
SET* STRT A2 A1 A0 INT_ST
* : With Pulled-Down Resistor
Figure 3.1. AK2557 Block Diagram
AK2557-E-Preliminay0.90 (Brief)
-2-
2015/7