MAX5878EGK+D【PDF 14/19 页】IC DAC 16BIT DUAL 250MSPS 68-QFN

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Sheet目录2011

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MAX5878

16-Bit, 250Msps, High-Dynamic-Performance,

Dual DAC with LVDS Inputs

_______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(AVDD3.3 = DVDD3.3 = AVCLK = +3.3V, AVDD1.8 = DVDD1.8 = +1.8V, GND = 0, fCLK = 2 x fDAC, external reference VREFIO = +1.25V, out-

put load 50

double-terminated, transformer-coupled output, IOUTFS = 20mA, TA = TMIN to TMAX, unless otherwise noted. Typical values

are at TA = +25°C.) (Note 2)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Reference Input Compliance

Range

VREFIOCR

0.125

1.260

Reference Input Resistance

RREFIO

Reference Voltage Drift

TCOREF

±25

ppm/

°C

ANALOG OUTPUT TIMING (See Figure 4)

Output Fall Time

tFALL

90% to 10% (Note 5)

0.7

Output Rise Time

tRISE

10% to 90% (Note 5)

0.7

Output-Voltage Settling Time

tSETTLE

Output settles to 0.025% FS (Note 5)

Output Propagation Delay

tPD

Excluding data latency (Note 5)

1.1

Glitch Impulse

Measured differentially

pVs

IOUTFS = 2mA

Output Noise

nOUT

IOUTFS = 20mA

pA/

√Hz

TIMING CHARACTERISTICS

Data to Clock Setup Time

tSETUP

Referenced to rising edge of clock (Note 6)

-1.2

Data to Clock Hold Time

tHOLD

Referenced to rising edge of clock (Note 6)

2.0

Latency to I output

Data Latency

Latency to Q output

Clock

Cycles

Minimum Clock Pulse-Width High

tCH

CLKP, CLKN

0.9

Minimum Clock Pulse-Width Low

tCL

CLKP, CLKN

0.9

LVDS LOGIC INPUTS (B15P/B15N–B0P/B0N, XORN, XORP, SELIQN, SELIQP)

Differential Input-Logic High

VIH

100

Differential Input-Logic Low

VIL

-100

Common-Mode Voltage Range

VCMR

1.125

1.375

Differential Input Resistance

RIN

(Note 7)

110

Input Capacitance

CIN

2.5

CMOS LOGIC INPUTS (PD, TORB)

Input-Logic High

VIH

0.7 x

DVDD3.3

Input-Logic Low

VIL

0.3 x

DVDD3.3

Input Leakage Current

IIN

-20

+20

PD, TORB Internal Pulldown

Resistance

VPD = VTORB = 3.3V

1.5

Input Capacitance

CIN

2.5

CLOCK INPUTS (CLKP, CLKN)

Sine wave

> 1.5

Differential Input

Voltage Swing

Square wave

> 0.5

VP-P

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