ADS42JB46 datasheet(6/63 Pages) TI1

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ADS42JB46

SBAS621B – JULY 2013 – REVISED SEPTEMBER 2015

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7.3 Recommended Operating Conditions

(1)

Over operating free-air temperature range, unless otherwise noted.

MIN

NOM

MAX

UNIT

SUPPLIES

AVDD

Analog supply voltage

1.7

1.8

1.9

AVDD3V

Analog buffer supply voltage

3.15

3.3

3.45

DRVDD

Digital supply voltage

1.7

1.8

1.9

IOVDD

Output buffer supply voltage

1.7

1.8

1.9

ANALOG INPUTS

Default after reset

VPP

VID

Differential input voltage range

2.5

VPP

VICR

Input common-mode voltage

VCM ± 0.025

Maximum analog input frequency with 2.5-VPP input amplitude

250

MHz

Maximum analog input frequency with 2-VPP input amplitude

400

MHz

CLOCK INPUT

10x mode

160

MSPS

Input clock sample rate

20x mode

156.25

MSPS

Sine wave, ac-coupled

0.3(3)

1.5

VPP

LVPECL, ac-coupled

1.6

VPP

Input clock amplitude differential

(VCLKP – VCLKM)

LVDS, ac-coupled

0.7

VPP

LVCMOS, single-ended, ac-coupled

1.5

Input clock duty cycle

35%

50%

65%

DIGITAL OUTPUTS

CLOAD

Maximum external load capacitance from each output pin to DRGND

3.3

RLOAD

Single-ended load resistance

+50

Operating free-air temperature

–40

°C

(1)

To reset the device for the first time after power-up, only use the RESET pin. Refer to the Register Initialization section.

(2)

For details, refer to the Digital Gain section.

(3)

Refer to the Performance vs Clock Amplitude curves (Figure 32 and Figure 33).

7.4 Thermal Information

ADS42JB46

THERMAL METRIC(1)

RGC (QFN)

UNIT

64 PINS

RθJA

Junction-to-ambient thermal resistance

22.9

°C/W

RθJC(top)

Junction-to-case (top) thermal resistance

7.1

°C/W

RθJB

Junction-to-board thermal resistance

2.5

°C/W

ψJT

Junction-to-top characterization parameter

0.1

°C/W

ψJB

Junction-to-board characterization parameter

2.5

°C/W

RθJC(bot)

Junction-to-case (bottom) thermal resistance

0.2

°C/W

(1)

For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application

report, SPRA953.

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