MAX3946ETG+ Maxim Integrated Products, MAX3946ETG+ Datasheet - Page 4

• Manufacturer Part Number: MAX3946ETG+
• Description: IC LASER DVR SFP 11.3GBPS 24TQFN
• Manufacturer: Maxim Integrated Products
• Type: Laser Diode Driverr

Specifications of MAX3946ETG+

• Data Rate: 11.3Gbps
• Number Of Channels: 1
• Voltage - Supply: 2.85 V ~ 3.63 V
• Current - Supply: 68mA
• Current - Modulation: 80mA
• Current - Bias: 80mA
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 12-WFQFN, Exposed Pad
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ELECTRICAL CHARACTERISTICS (continued)
(V
Typical values are at V
noted.) (Note 1)
1.0625Gbps to 11.3Gbps, SFP+ Laser Driver
with Laser Impedance Mismatch Tolerance
4
SAFETY FEATURES
Threshold Voltage at BMAX
Threshold Voltage at BIAS
Threshold Voltage at BMON
SFP TIMING REQUIREMENTS
DISABLE Assert Time
DISABLE Negate Time
FAULT Reset Time of Power-On
Time
FAULT Reset Time
DISABLE to Reset
BIAS CURRENT DAC
Full-Scale Current
LSB Size
Integral Nonlinearity
Differential Nonlinearity
MODULATION CURRENT DAC (25I DIFFERENTIAL LOAD)
Full-Scale Current
LSB Size
Integral Nonlinearity
Differential Nonlinearity
CONTROL I/O SPECIFICATIONS
DISABLE Input Current
DISABLE Input High Voltage
DISABLE Input Low Voltage
CC
______________________________________________________________________________________
= +2.85V to +3.63V, T
PARAMETER
CC
= +3.3V, I
A
= -40°C to +85°C, and Figure 1. Guaranteed by design and characterization from T
SYMBOL
BIAS
I
I
t
V
V
BIAS-FS
MOD-FS
_FAULT
V
t
t
BMON
t
DNL
DNL
BMAX
_OFF
_INIT
_ON
INL
INL
V
BIAS
V
I
I
IH
IL
IH
IL
= 60mA, I
FAULT always occurs for V
FAULT never occurs for V
(Note 1, Figure 1)
FAULT never occurs for V
FAULT always occurs for V
Warning always occurs for V
V
V
Time from rising edge of DISABLE input
signal to I
I
Time from falling edge of DISABLE to I
and I
Time from power-on or negation of FAULT
using DISABLE
Time from fault to FAULT on, C
20pF, R
Time DISABLE must be held high to reset
FAULT
SET_IBIAS[8:1] = HxFF
5mA P I
5mA P I
tonic at 8-bit resolution SET_IBIAS[8:1]
SET_IMOD[8:1] = HxFF
10mA P I
10mA P I
tonic at 9-bit resolution SET_IMOD[8:0]
Depends on pullup resistance
MOD-OFF
CC
BMON
MOD
- 0.5V, warning never occurs for
MOD
BIAS
BIAS
< V
FAULT
= 40mA, 25I differential output load, and T
MOD
MOD
BIAS
at 90% of steady state
CC
P 80mA
P 80mA, guaranteed mono-
P 80mA
P 80mA, guaranteed mono-
= 4.7kI
CONDITIONS
< I
- 0.7V
BIAS-OFF
BMAX
BIAS
and I
BMAX
BIAS
BMON
R 0.57V,
FAULT
< 1.1V
< 0.44V
MOD
R 1.3V,
R
<
P
BIAS
V
0.44
MIN
1.1
0.7
0.5
1.8
CC
80
80
0
-
A
= +25°C, unless otherwise
V
Q0.5
TYP
0.48
0.05
±0.5
±0.5
100
190
105
200
500
1.2
CC
0.6
0.5
0.5
Q1
50
-
A
= -40°C to +95°C.
V
MAX
0.57
V
200
800
1.3
0.5
0.8
CC
12
1
5
2
CC
-
UNITS
%FS
%FS
LSB
LSB
mA
mA
FA
FA
FA
Fs
Fs
Fs
Fs
Fs
V
V
V
V
V