T0800 Datasheet, PDF (3/14 Pages) ATMEL Corporation – 5-CHANNEL LASER DRIVER WITH RF OSCILLATOR AND 2 OUTPUTS

Figure 2-2. Pinning QFN28
I4
I5
RFA
RFB
GND
NE2
NE3
28 27 26 25 24 23 22
1
21
2
20
3
19
4
18
5
17
6
16
7
15
8 9 10 11 12 13 14
IOUTA
IOUTA
GND
RSA
RSB
IOUTB
IOUTB
Table 2-2.
Pin
1
2
3
4
5
6
7
8
9
10
11, 12
13
14
15
16
17
18
19
20
21
22, 23
24
25
26
27
28
Paddle
Pin Description: QFN28
Symbol
Type Function
I4
Analog Input current, bias voltage approximately GND
I5
Analog Input current, bias voltage approximately GND
RFA
Analog External resistor to GND sets frequency of oscillator A
RFB
Analog External resistor to GND sets frequency of oscillator B
GND
Supply Ground
NE2
Digital Digital control of channel 2 (low active)
NE3
Digital Digital control of channel 3 (low active)
NE4
Digital Digital control of channel 4 (low active)
NE5
Digital Digital control of channel 5 (low active)
ENABLE
Digital Enables output current (high active)
VCC2
Supply +5 V power supply IOUT
ENOSC
Digital Enables RF oscillator (high active)
SELA
Digital
High: selects IOUTA, RFA, RSA
Low: selects IOUTB, RFB, RSB
IOUTB
Analog Output current source B for laser diode
IOUTB
Analog Output current source B for laser diode
RSB
Analog External resistor to GND sets swing of oscillator B
RSA
Analog External resistor to GND sets swing of oscillator A
GND
Supply Ground
IOUTA
Analog Output current source A for laser diode
IOUTA
Analog Output current source A for laser diode
VCC2
Supply +5 V power supply IOUT
VCC1
Supply +5 V power supply circuit
NC
–
Not connected
IR
Analog Input current, bias voltage approximately GND
I2
Analog Input current, bias voltage approximately GND
I3
Analog Input current, bias voltage approximately GND
–
–
Should be connected with ground
4503D–DVD–02/05
T0800
3