ISL58781 Datasheet, PDF (6/15 Pages) Intersil Corporation – Laser Diode Driver with Serial Control and Write Current DAC

ISL58781
IBLUE Write Power DAC (10-bit) DC Specifications Standard conditions unless otherwise noted.
PARAMETER
DESCRIPTION
CONDITIONS
MIN TYP MAX UNIT
DNL-W
Differential Non-Linearity
-4.9
+2.0 LSB
INL-W
Integral Non-Linearity
At fixed 2.5V headroom
+60
LSB
FS_OUT-H2.0
TR_RANGE
PSRR_-FS
Write DAC Full-Scale Output Current
R_SET = 620
Tr Tf adjustment Range
Power Supply Rejection -Full -Scale
Current
WriteDAC = 0x3FF;
Fixed Headroom = 2.0V; Reg 1-21 = 8F
Reg 1-0A from X0h to X7h
vs V_SO (Note 15)
380 445 575 mA
1
ns
-40
dB
TC_FS-IBLUE
Temperature Coefficient -Full-Scale
Current
(Note 16)
600
ppm/C
ZS-W
R_OUT-WDAC
Zero-Scale Error
Write DAC Output Series Resistance
V_IOUT = 2V (Note 17)
WriteDAC = PMAX = 0x3FF
PMAX bias overdriven (Note 18)
-8 0 +8 LSB
2.9 4.5

NOTES:
15. Full scale output current power supply sensitivity (SFS) is measured by varying the V_SO from 4.5V to 5.5V DC and measuring
the effect of this signal on the full-scale output current.
16. Full scale output current temperature coefficient (TFS) is given by delta (full scale output current)/(T).
17. Zero-scale error (ZS) is the deviation from zero current output when the digital input code is zero.
18. PMAX bias overdriven via R_SET.
IBLUE Read APC Amplifier DC Specifications Standard conditions unless otherwise noted.
PARAMETER
DESCRIPTION
CONDITIONS
MIN TYP MAX UNIT
IAPC_MIN-GAIN
IAPC_MAX-GAIN
IAPC_GAIN
IAPC_OS
LIN_APC
I_OUT-R-APC
R_IN
PSRR_APC
Current Gain @Min Gain
Reg1-21h = 1X, I_APC = 0µA, 500µA
Current Gain @ Max Gain
Reg1-21h = FX, I_APC = 0µA, 500µA
Current Gain
I_APC = 0µA, 500µA
Current Offset
I_APC = 0µA
Output Current Linearity
I_APC = 0µA, 500µA, 1.0mA
Blue Read Output Current, Using I_APC Input I_APC = 1.5mA
I_APC Input Impedance to GND
I_APC Current Power Supply Rejection
I_OUT-average = 100mA, varying V_SO
8
180
80
-2
0
150
800
12 22 mA/mA
220 280 mA/mA
101 150 mA/mA
1
3
mA
6
%
mA
1300 
-46
dB
OUT1/2 Read APC Amplifier DC Specifications Standard condition unless otherwise noted.
PARAMETER
DESCRIPTION
CONDITIONS
MIN TYP MAX
IAPC_MIN-GAIN
IAPC_MAX-GAIN
IAPC_GAIN
IAPC_OS
LIN_APC
I_OUT-R-APC
Current Gain @ Min Gain
Current Gain @ Max Gain
Current Gain
Current Offset
Output Current Linearity
Read Output Current, Using I_APC
Input
Reg1-21h = 1X, I_APC = 0µA, 500µA 10.5
14
17.5
Reg1-21h = FX, I_APC = 0µA, 500µA 145
163
185
I_APC = 0µA, 500µA
82
92
108
I_APC = 0µA
-2
1
3
I_APC = 0µA, 500µA, 1.0mA
0
6
I_APC = 1.5mA
120
R_IN
PSRR_APC
I_APC Input Impedance to GND
I_APC Current Power Supply Rejection I_APC-IN = 0.45mA, varying V_SO
800
1300
-48
UNIT
mA/mA
mA/mA
mA/mA
mA
%
mA

dB
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6
FN6909.3
December 3, 2015