XRD64L43AIV 查看數據表（PDF） - Exar Corporation

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XRD64L43AIV

Dual 10-Bit 40MSPS CMOS ADC

Exar Corporation 

Preliminary

XRD64L43

Dual 10-Bit 40MSPS CMOS ADC

FEATURES

• 10-Bit Resolution

• Two Monolithic Complete 10-Bit ADCs

• 40 MSPS Conversion Rate

• On-Chip Track-and-Hold

• On-Chip Voltage Reference

• Low 5 pF Input Capacitance

• TTL/CMOS Outputs

• Tri-State Output Buffers

• Single +3.0V Power Supply Operation

• Low Power Dissipation: 200mW-typ @ 2.7V

• Power Down Mode Less Than 5mW

• 75dB Crosstalk (fin=1.0MHz)

• -40°C to +85°C Operation Temperature Range

GENERAL DESCRIPTION

APPLICATIONS

• MedicalImaging

• Instrumentation

• DataAquisitionSystems

• DigitalComunications

July 2003

BENEFITS

• ReductionofComponents

• Reduction of System Cost

• High Performance @ Low Power Dissipation

• Long Term Time and Temperature Stability

The XRD64L43 is two 10-bit, monolithic, 40 MSPS

ADCs. Manufactured using a standard CMOS pro-

cess, the XRD64L43 offers low power, low cost and

excellent performance. The on-chip track-and-hold

amplifier(T/H) and voltage reference (VREF) eliminate

the need for external active components, requiring only

an external ADC conversion clock for the application.

The XRD64L43 analog input can be driven with ease

due to the high input impedance.

The design architecture uses 17 time- interleaved 10-

bit SAR ADCs in each converter to achieve high

conversion rate of 40 MSPS minimum. In order to

insure and maintain accurate 10-bit operation with

respect to time and temperature, XRD64L43 incorpo-

rates an auto-calibration circuit which continuously

adjusts and matches the offset and linearity of each

ADC. This auto-calibration circuit is transparent to the

user after the initial 4.2ms calibration (168,000 initial clock

cycles).

The power dissipation is only 200mW at 40 MSPS with +2.7V

power supply.

The digital output data is straight binary format, and the tri-

state disable function is provided for common bus interface.

The XRD64L43 internal reference provides cost savings

and simplifies the design/development. The output voltage

of the internal reference is set by two external resistors. The

internal reference can be disabled if an external reference is

used for a power savings of 50mW.

ORDERING INFORMATION

Part Number

XRD64L43AIV

Package Type

64-Lead LQFP

Temperature Range

-40°C to +85°C

Rev. P1.00

EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 • (510) 668-7000 • FAX (510) 668-7017

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