AK2574VB AKM [Asahi Kasei Microsystems], AK2574VB Datasheet - Page 5

• Manufacturer Part Number: AK2574VB
• Description: 156M Laser Diode Driver + APC for Burst Mode
• Manufacturer: AKM [Asahi Kasei Microsystems]

Pin Description (Continued)
Center PAD of PKG should be connected to the VSS for good electrical performance and radiation of heat.
<MS0266-E-00>
PIN# Symbol
27, 28 IMODN
29, 30 IMOD
31
32
33, 34 IBIAS
35
36
37
38
41
42
43
44
45
46
47
48
39
40
VSSMD
VSSBI
VSSBI
IBIASC1
NC
IBIASC2
IBIASR1
PDIN
TEMPMON
BIAS
AVDD
AVSS
TXACT
TEST1
DVSS
DVDD
range) capacitor.
range) capacitor.
1% resistor.
(DACAPC output) and is kept during BRST=”H”. TXACT is reset
when BRST is transient “H” → “L”. The polarity can be set with
EEPROM. TXACT is valid within 2ms after power-up.
Function
Negative MOD current output.
Sinks MOD current when input data is “L”.
Positive MOD current output.
Sinks up to 85mA (typ) MOD current when input data is “H”.
MOD current is adjusted with I-DAC1.
IMOD voltage should be (VDD – 1.8V) or more.
VSS for MOD current drive circuit.
VSS for BIAS current drive circuit.
BIAS current output. Sinks up to 54mA (typ) current.
BIAS current is adjusted with I-DAC2.
IBIAS voltage should be (VDD – 1.8V) or more.
VSS for BIAS current drive circuit.
Connect to VSS with 0.1uF 50% (in the operating temerature
No Connection. Connect to the VSS (recommended) or leave open.
Connect to VSS with 0.1uF 50% (in the operating temerature
Temperature sensor monitor output.
BIAS reference for internal circuit. Connect to VSS with 12kΩ
Power supply for analog circuit.
VSS for analog circuit.
TXACT is set when PDIN voltage beyond the reference voltage
VSS for digital circuit.
Power supply for digital circuit.
Connect to IBIASSC1 with 330Ω 1% resistor.
Monitor PD voltage input. Monitor PD current is converted to the
voltage with resistor.
Test input. Connect to VSS for normal operation
-5-
I/O
Ao
Ao
PWR
PWR
Ao
PWR
Ao
Ao
Ao
Ao
PWR
PWR
Do
PWR
PWR
Ao
Ai
Di
Remark
AC load
Connect to
DC load
VSS.
≤ 30pF
≥ 50kΩ
2003/12