ADC081000LEVAL NSC [National Semiconductor], ADC081000LEVAL Datasheet

ADC081000LEVAL

Manufacturer Part Number

ADC081000LEVAL

Description

High Performance, Low Power 8-Bit, 1 GSPS A/D Converter

Manufacturer

NSC [National Semiconductor]

Datasheet

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ADC081000

High Performance, Low Power 8-Bit, 1 GSPS A/D

Converter

General Description

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. Consuming a

typical 1.4 Watts at 1 GSPS from a single 1.9 Volt supply,

this device is guaranteed to have no missing codes over the

full operating temperature range. The unique folding and

interpolating architecture, the fully differential comparator

design, the innovative design of the internal sample-and-

hold amplifier and the self-calibration scheme enable a very

flat response of all dynamic parameters beyond Nyquist,

producing a high 7.5 ENOB with a 500 MHz input signal and

a 1 GHz sample rate. Output formatting is offset binary and

the LVDS digital outputs are compliant with IEEE 1596.3-

1996, with the exception of a reduced common mode volt-

age of 0.8V.

The converter has a 1:2 demultiplexer that feeds two LVDS

buses, reducing 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 MHz output rate per bus and a com-

bined output rate of 1 GSPS.

The converter typically consumes less than 10 mW in the

Power Down Mode and is available in a 128-lead, thermally

enhanced exposed pad LQFP and operates over the indus-

trial (-40˚C ≤ T

Block Diagram

≤ +85˚C) temperature range.

DS200681

Features

n Internal Sample-and-Hold

n Single +1.9V

n Adjustable Output Levels

n Guaranteed No Missing Codes

n Low Power Standby Mode

Key Specifications

n Resolution

n Max Conversion Rate

n ENOB

n DNL

n Conversion Latency

n Power Consumption

Applications

n Direct RF Down Conversion

n Digital Oscilloscopes

n Satellite Set-top boxes

n Communications Systems

n Test Instrumentation

— Operating

— Power Down Mode

500 MHz Input

0.1V Operation

7 and 8 Clock Cycles

0.25 LSB (typ)

1 GSPS (min)

www.national.com

20068153

7.5 Bits (typ)

1.45 W (typ)

9 mW (typ)

July 2004

8 Bits

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