IC 10-BIT 20MHZ +3V A/D 28-SSOP

 

ADS900E

Manufacturer Part NumberADS900E
DescriptionIC 10-BIT 20MHZ +3V A/D 28-SSOP
ManufacturerTexas Instruments
SeriesSpeedPlus™
ADS900E datasheets

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Warranty: 60 days

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Specifications of ADS900E

Number Of Bits10Sampling Rate (per Second)20M
Data InterfaceParallelNumber Of Converters1
Power Dissipation (max)52mWVoltage Supply SourceSingle Supply
Operating Temperature-40°C ~ 85°CMounting TypeSurface Mount
Package / Case28-SSOP (0.200", 5.30mm Width)Input Signal TypeSingle-Ended or Differential
Number Of Adc Inputs1Conversion Rate20000 KSPS
Resolution10 bitArchitecturePipelined
Input Voltage1 V / 1.25 V / 1.75 V / 2 VInterface TypeParallel
Integral Nonlinearity+/-3.5 LSB (Typ)Snr49 dB (Typ)
Voltage ReferenceInternalSupply Voltage (max)3.7 V
Supply Voltage (min)2.7 VMaximum Power Dissipation66 mW
Maximum Operating Temperature+ 85 CMinimum Operating Temperature- 40 C
Mounting StyleSMD/SMTPower Consumption54 mW
Sample And HoldYesFor Use With296-18427 - DEMO BOARD FOR ADS9XX
Lead Free Status / RoHS StatusLead free / RoHS Compliant  
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ANALOG-TO-DIGITAL CONVERTER
FEATURES
+2.7V TO +3.7V SUPPLY OPERATION
INTERNAL REFERENCE
LOW POWER: 52mW at +3V
SINGLE-ENDED INPUT RANGE: 1V to 2V
WIDEBAND TRACK/HOLD: 350MHz
SSOP-28 PACKAGE
APPLICATIONS
PORTABLE INSTRUMENTATION
IF AND BASEBAND COMMUNICATIONS
CABLE MODEMS
SET-TOP BOXES
PORTABLE TEST EQUIPMENT
COMPUTER SCANNERS
ADS900
2V
IN
1V
IN
(Opt.)
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
10-Bit, 20MHz, +3V Supply
TM
DESCRIPTION
The ADS900 is a high-speed pipelined Analog-to-Digital
Converter (ADC). This complete converter includes a high
bandwidth track-and-hold, a 10-bit quantizer, and an inter-
nal reference.
The ADS900 employs digital error correction techniques to
provide excellent differential linearity for demanding im-
aging applications. Its low distortion and high SNR give the
extra margin needed for telecommunications, video and
test instrumentation applications.
This high-performance ADC is specified for performance
at a 20MHz sampling rate. The ADS900 is available in an
SSOP-28 package.
CLK
Timing
Circuitry
Error
Pipeline
T/H
Correction
A/D
Internal
Reference
LpBy
CM
LnBy
1V
REF
www.ti.com
ADS900
SBAS058A – MAY 2001
LV
DD
10-Bit
3-State
Digital
Outputs
Data
Pwrdn
OE
Copyright © 1997, Texas Instruments Incorporated

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ADS900E Summary of contents

  • Page 1

    ... Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty ...

  • Page 2

    ... ADS900E SSOP-28 " " NOTE: (1) Models with a slash (/) are available only in Tape and Reel in the quantities indicated (e.g., /1K indicates 1000 devices per reel). Ordering 1000 pieces of “ADS900E/1K” will get a single 1000-piece Tape and Reel. ELECTRICAL CHARACTERISTICS + +3V, Single-Ended Input, Sampling Rate = 20MHz, unless otherwise specified. ...

  • Page 3

    ... FS Input + 15pF PwrDn = L PwrDn = 2.5MHz S +25 C Referred to Ideal Midscale Full V = +10% Full S Full Full Full Operating Full Operating Full Operating, +3V Full 25 C +3V Full ADS900E MIN TYP MAX UNITS 0.7 LSBs 0.7 1.0 LSBs Guaranteed 3.5 LSBs 53 dBFS 47 53 dBFS 50 dBc ...

  • Page 4

    PIN CONFIGURATION Top View + LSB Bit Bit 9 Bit 8 5 Bit 7 6 Bit 6 7 ADS900 Bit 5 8 Bit 4 9 Bit Bit 2 12 ...

  • Page 5

    TYPICAL CHARACTERISTICS + +3V, Single-Ended Input, Sampling Rate = 20MHz, unless otherwise specified SPECTRAL PERFORMANCE 0 –20 –40 –60 –80 –100 Frequency (MHz) SPECTRAL PERFORMANCE ...

  • Page 6

    TYPICAL CHARACTERISTICS + +3V, Single-Ended Input, Sampling Rate = 20MHz, unless otherwise specified INTEGRAL LINEARITY ERROR 10.0 5.0 0 –5.0 –10.0 0 200 400 600 Output Code DYNAMIC PERFORMANCE ...

  • Page 7

    TYPICAL CHARACTERISTICS + +3V, Single-Ended Input, Sampling Rate = 20MHz, unless otherwise specified SIGNAL-TO-NOISE RATIO (SNR) vs TEMPERATURE 10MHz 500kHz IN 45 ...

  • Page 8

    THEORY OF OPERATION The ADS900 is a high speed sampling ADC that utilizes a pipeline architecture. The fully differential topology and digital error correction guarantee 10-bit resolution. The track-and-hold circuit is shown in Figure 1. The switches are controlled by ...

  • Page 9

    The pipelined quantizer architecture has 9 stages with each stage containing a two-bit quantizer and a two bit Digital- to-Analog Converter (DAC), as shown in Figure 2. Each two-bit quantizer stage converts on the edge of the sub- clock, which ...

  • Page 10

    As a passive component, a transformer can be used to step- up the signal amplitude without adding noise or distortion. At the same time it electrically isolates the front-end from the converter. In order to achieve optimum performance and to ...

  • Page 11

    It should be noted that any DC voltage difference between the inputs, IN and IN, will show offset at the output. At ...

  • Page 12

    POWER-DOWN MODE The ADS900’s low power consumption can be reduced even further by initiating a power down mode. For this, the Power Down Pin (Pin 17) must be tied to a logic “High” reducing the current drawn from the supply ...

  • Page 13

    ... ADS900E ACTIVE ADS900E/1K ACTIVE ADS900E/1KG4 ACTIVE ADS900EG4 ACTIVE (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design ...

  • Page 14

    ... TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Type Drawing ADS900E/1K SSOP DB PACKAGE MATERIALS INFORMATION Pins SPQ Reel Reel A0 (mm) Diameter Width (mm) W1 (mm) 28 1000 330.0 16.4 8.2 Pack Materials-Page 1 9-May-2008 B0 (mm) K0 (mm Pin1 (mm) (mm) Quadrant 10.5 2 ...

  • Page 15

    ... Device Package Type ADS900E/1K SSOP PACKAGE MATERIALS INFORMATION Package Drawing Pins SPQ Length (mm 1000 Pack Materials-Page 2 9-May-2008 Width (mm) Height (mm) 346.0 346.0 33.0 ...

  • Page 16

    ... Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’ ...

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