ATR0841 Datasheet, PDF (3/6 Pages) ATMEL Corporation – 4-channel Laser Driver with 2 Outputs, 3 LVDS Inputs and Internal Termination

Pin Configuration
Figure 2. Pinning QFN24
RFB
RFA
E2
NE2
E3
NE3
24 23 22 21 20 19
1
18
2
17
3
16
4
15
5
14
6
13
7 8 9 10 11 12
IOUTA
GND
RSA
RSB
IOUTB
SELA
ATR0841
Pin Description
Pin
Symbol
1
RFB
2
RFA
3
E2
4
NE2
5
E3
6
NE3
7
E4
8
NE4
9
ENOSC
10
ENABLE
11
VCC
12
VCC
13
SELA
14
15
16
17
18
19
20
21
22
23
24
Paddle
IOUTB
RSB
RSA
GND
IOUTA
VCC
VCC
IR
I2
I3
I4
GND
Type
Analog
Analog
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Supply
Supply
Digital
Analog
Analog
Analog
Supply
Analog
Supply
Supply
Analog
Analog
Analog
Analog
Supply
Function
External resistor to ground sets frequency of oscillator B
External resistor to ground sets frequency of oscillator A
+LVDS control of channel 2
-LVDS control of channel 2
+LVDS control of channel 3
-LVDS control of channel 3
+LVDS control of channel 4
-LVDS control of channel 4
Enables RF oscillator (high active)
Enables output current (high active)
+5 V power supply
+5 V power supply
High: selects IOUTA, RSA, RFA
Low: selects IOUTB, RSB, RFB
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
Ground
Output current source A for laser diode
+5 V power supply
+5 V power supply
Reference current input read channel (input impedance 500 Ω to ground)
Reference current input channel 2 (input impedance 500 Ω to ground
Reference current input channel 3 (input impedance 500 Ω to ground)
Reference current input channel 4 (input impedance 500 Ω to ground)
Ground
3
4818AS–DVD–09/04