atr0843 ATMEL Corporation, atr0843 Datasheet - Page 3

• Manufacturer Part Number: atr0843
• Description: Atr0843 4-channel Laser Driver With 2 Outputs And 3 Lvds Inputs, Ner Enable
• Manufacturer: ATMEL Corporation

Pin Configuration
Figure 2. Pinning QFN24
Pin Description
4820AS–DVD–09/04
Paddle
Pin
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
1
2
3
4
5
6
7
8
9
ENABLE
Symbol
ENOSC
IOUTB
IOUTA
SELA
GND
VCC
VCC
RSB
RSA
NER
VCC
VCC
RFB
RFA
NE2
NE3
NE4
E2
E3
E4
IR
I2
I3
I4
Analog
Analog
Supply
Supply
Analog
Analog
Analog
Supply
Analog
Supply
Supply
Analog
Analog
Analog
Analog
Supply
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Type
Function
External resistor to ground sets frequency of oscillator B
External resistor to ground sets frequency of oscillator A
Digital control of channel 2 (high active)
Digital control of channel 2 (low active)
Digital control of channel 3 (high active)
Digital control of channel 3 (low active)
Digital control of channel 4 (high active)
Digital control of channel 4 (low active)
Enables RF oscillator (high active)
Enables output current (high active)
+5 V power supply
+5 V power supply
High: selects IOUTA, RFA, RSA
Low: selects IOUTB, RFB, RSB
Output current source B for laser diode
External resistor to ground sets swing of oscillator B
External resistor to ground sets swing of oscillator A
Digital control of read channel (channel 1), active low
Output current source A for laser diode
+5 V power supply
+5 V power supply
Reference current input read channel (input impedance 500
Reference current input channel 2 (input impedance 500
Reference current input channel 3 (input impedance 500
Reference current input channel 4 (input impedance 500
Ground
RFB
RFA
NE2
NE3
E2
E3
1
2
3
4
5
6
24 23 22 21 20 19
7 8
9 10 11 12
18
17
16
15
14
13
IOUTA
RSA
RSB
IOUTB
SELA
NER
to ground)
to ground)
to ground)
to ground)
ATR0843
3