Datasheet > MAX3948

MAX3948

更新时间： 2022-04-25 09:42:13

品牌	Logo	应用领域
美信 - MAXIM		驱动器
页数	文件大小	规格书
37页	3974K
描述
11.3Gbps, Low-Power, DC-Coupled Laser Driver

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MAX3948 数据手册

�� ꢀMaxim Integrated Productsꢀ ꢀ 5

MAX3948

11.3Gbps, Low-Power, DC-Coupled Laser Driver

ELECTRICALꢀCHARACTERISTICSꢀ(continued)

= V

= 2.95V to 3.63V, T = -40NC to +95NC; typical values are at V

= V

= 3.3V, T = +25NC, LD

= 20mA, LD

CCT

DC MOD

= 40mA, and 14I single-ended electrical output load, unless otherwise noted. See Figure 1 for electrical setup.) (Note 2)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

TIMINGꢀREQUIREMENTSꢀ(Notesꢀ5,ꢀ6,ꢀ8)

= 25mA, LD

= 65mA, DC and

MOD

modulation DAC are both H0x00, time from

Initialization Time

250

INIT

TX_EN = high to LD

of steady state

and LD

at 90%

MOD

Time from rising edge of DISABLE input

signal to LD and LD at 10% of

steady state (Note 6)

DISABLE Assert Time

DISABLE Negate Time

FAULT Reset Time

250

0.7

600

OFF

MOD

Time from falling edge of DISABLE to LD

and LD

at 90% of steady state (Note 6)

MOD

Time from negation of latched fault using

DISABLE to LD

steady state

and LD

at 90% of

RECOVER

MOD

Time from fault to FAULT = high, C

≤

FAULT

FAULT Assert Time

FAULT

20pF, R

= 4.7kW

FAULT

Time DISABLE must be held high to reset

fault

DISABLE to Reset Time

DIGITALꢀI/OꢀSPECIFICATIONSꢀ(SDA,ꢀSCL,ꢀCSEL,ꢀFAULT,ꢀDISABLE)

Input High Voltage

Input Low Voltage

Input Hysteresis

1.8

0.8

7.5

440

HYST

Input Capacitance

DISABLE Input Resistance

Internal pullup resistor

Input connected to V

4.7

PULL

Input Leakage Current

(DISABLE)

Input connected to GND

Input connected to V

775

-2

Input Leakage Current (SDA)

Input connected to GND; internal pullup is

75kW typical

Input connected to V ; internal pulldown

is 75kW typical

-2

Input Leakage Current (SCL,

CSEL)

Input connected to GND

Output High Voltage (SDA,

FAULT)

External pullup is (4.7kI to 10kI) to V

V - 0.1

Output Low Voltage (SDA,

FAULT)

External pullup is (4.7kI to 10kI) to V

0.4

1 2 3 456 7 8...37

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