National Semiconductor ADC08100 Technical data

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ADVANCE INFORMATION

ADC081000
8-Bit, 1 GSPS A/D Converter with Internal Reference and
Sample-and-Hold

ADC081000 8-Bit, 1 GSPS A/D Converter with Internal Reference and Sample-and-Hold

February 2004

General Description

NOTE: This product is currently in development. - ALL
specifications are design targets and are subject to
change.

The ADC081000 is a low power, high performance CMOS
analog-to-digital converter that digitizes signals to 8 bits
resolution at sampling rates up to 1.6 GSPS while consum­ing a typical 1.4 Watts from a single 1.9 Volt supply at 1.0
GSPS. This device is guaranteed to have no missing codes
over the full operating temperature range. The unique
folding/interpolating architecture, the fully differential com­parator design and the innovative design of the internal
sample-and-hold amplifier enable a very flat SINAD/ENOB
response beyond Nyquist, producing a high 7.5 ENOB with a
100 MHz input signal and a 1 GHz sample rate. Output
formatting is offset binary coding with LVDS digital outputs
compliant with IEEE 1596.3-1996, with the exception of a
reduced common mode voltage of 0.8V.

The converter has a 1:2 demultiplexer that feeds two LVDS
buses and reduces the output data rate on each bus to half
the sampling rate. The data on these buses are interleaved
in time to provide a 500 MSPS output rate per bus and a
combined output rate of 1 GSPS.

Setting the PD (Power Down) pin high places the converter
into an inactive power down state, where it typically con­sumes less than 5 mW.

The ADC081000 is available in a 128-lead exposed pad
LQFP and operates over the industrial (-40
temperature range.

o

C ≤ TA≤ +85oC)

Features

n Internal Sample-and-Hold
n Single +1.9V
n Adjustable Output Levels
n Guaranteed No Missing Codes
n Low Power Standby Mode

±

0.1V Operation

Key Specifications

n Resolution 8 Bits
n Max Conversion Rate 1 GSPS (min)
n No Missing Codes Guaranteed
n ENOB
n DNL
n Conversion Latency 7/8 Clock Cycles
n PSRR 40 dB (typ)
n Power Consumption

@

100 MHz Input 7.5 Bits (typ)

±

0.25 LSB (typ)

— Operating 1.4 W (typ)
— Power Down Mode 5 mW (typ)

Applications

n Direct RF Down Conversion
n Digital Oscilloscopes
n RADAR / SONAR / ECM
n Satellite Set-top boxes
n WLANs
n Communications Systems
n Test Instrumentation

Block Diagram

20068153

© 2004 National Semiconductor Corporation DS200681 www.national.com

Ordering Information

ADC081000

Pin Configuration

Extended Commercial Temperature

<

<

T

Range (-40˚C

ADC081000CIYB 128-Pin Exposed Pad LQFP

ADC081000LEVAL Evaluation Board

A

+85˚C)

NS Package

20068101

www.national.com 2

Physical Dimensions inches (millimeters) unless otherwise noted

ADC081000 8-Bit, 1 GSPS A/D Converter with Internal Reference and Sample-and-Hold

NOTES: UNLESS OTHERWISE SPECIFIED

REFERENCE JEDEC REGISTRATION MS-026, VARIATION BFB.

24-Lead Package TC

Order Number ADC081000CIMT

NS Package Number VNX128A

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