T0816_05 Datasheet, PDF (8/15 Pages) ATMEL Corporation – 3-channel Laser Driver with RF Oscillator

8. Electrical Characteristics: Laser Current Amplifier Outputs AC Performance
V_CC = + 5V, I_OUT = 40 mA DC with 40 mA pulse, T_amb = 25°C unless otherwise specified
No.
Parameters
Test Conditions
Pin
Symbol
Min.
Typ.
Max.
Unit Type*
5 Output AC Performance
5.1 Write rise time
I_OUT = 40 mA (read) +
40 mA (10 to 90%)⁽¹⁾
14
t_RISE
1.0
2.0
ns
C
5.2 Write fall time
I_OUT = 40 mA (read) +
40 mA (10 to 90%)⁽¹⁾
14
t_FALL
1.1
2.0
ns
C
5.3
Output current
overshoot
I_OUT = 40 mA (read) +
40 mA⁽¹⁾
14
OS
5
%
C
5.4
I_OUT ON propagation
delay
NE 50% High-Low to
I_OUT at 50% of final
value
14
t_ON
2
ns
C
5.5
I_OUT OFF propagation
delay
NE 50% Low-High to
I_OUT at 50% of final
value
14
t_OFF
2
ns
C
5.6 Disable time
ENABLE 50%
High-Low to I_OUT at
14
t_DIS
50% of final value
20
ns
C
5.7 Enable time
ENABLE 50%
Low-High to I_OUT at
14
t_EN
50% of final value
20
ns
C
5.8 Amplifier bandwidth
I_OUT = 50 mA, all
channels, –3 dB
value
14
BW_LCA
16
MHz
C
6 Oscillator
6.1 Oscillator frequency RF = 7.5 kΩ
6.2
Osc. temperature
coefficient
RF = 7.5 kΩ
14
F_OSC
270
300
330
MHz
A
14
TC_OSC
–150
ppm/°C
C
ENOSC 50% High-
6.3 Disable time oscillator Low to I_OUT at 50% of 14
T_DISO
4
ns
C
final value
ENOSC 50% Low-
6.4 Enable time oscillator High to I_OUT at 50% of 14
final value
T_ENO
2
ns
C
*) Type means: A =100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
Note: 1. Load resistor at IOUT 6.8 Ω, measurement with 50-Ω oscilloscope and 39-Ω series resistor.
8 T0816
4505H–DVD–11/05