T0820_05 Datasheet, PDF (7/12 Pages) ATMEL Corporation – 4-channel Laser Driver with RF Oscillator

T0820
8. Electrical Characteristics: Laser Current Amplifier Output 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 Laser Current Amplifier Output AC Performance
5.1 Write rise time
I_OUT = 40 mA (read) +
40 mA (10% – 90%)⁽¹⁾
14
t_RISE
1.0
3.0
ns
C
5.2 Write fall time
I_OUT = 40 mA (read) +
40 mA (10% – 90%)⁽¹⁾
14
t_FALL
1.1
3.0
ns
C
5.3
Output current
overshoot
I_OUT = 40 mA (read) +
40 mA ⁽¹⁾
14
OS
5
%
C
NE 50% High-Low to
5.4 I_OUT ON prop delay
I_OUT at 50% of final
14
t_ON
value
2.0
ns
C
NE 50% Low-High to
5.5 I_OUT OFF prop delay I_OUT at 50% of final
14
t_OFF
value
2.0
ns
C
5.6 Disable time
ENABLE 50%
High-Low to I_OUT at
14
t_DIS
50% of final value
10
ns
C
5.7 Enable time
ENABLE 50%
Low-High to I_OUT at
14
t_EN
50% of final value
50
ns
C
5.10 Amplifier bandwidth
I_OUT = 50 mA, all
channels, –3 dB value
14
BW_LCA
20
MHz
C
6 Oscillator
6.1
Oscillator frequency
RF = 7.5 kΩ
RS = 560Ω
14
F_OSC
255
300
350
MHz
A
Oscillator
6.2 temperature
coefficient
RF = 7.5 kΩ
RS = 560Ω
14
TC_OSC
-150
ppm/
°C
C
ENOSC 50%
6.3 Disable time oscillator Low-High to I_OUT at
14
T_DISO
4
ns
C
50% of final value
ENOSC 50%
6.4 Enable time oscillator High-Low to I_OUT at
14
T_ENO
50% of final value
2
ns
C
6.5 Oscillator swing
RF = 7.5 kΩ
RS = 560Ω
14
S_OSC
35
55
mApp
A
*) Type means: A =100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
Note: 1. Load resistor at IOUT 10Ω, measurement with a 50-Ω oscilloscope and a 39-Ω series resistor
7
4506G–DVD–11/05