LM98714   
Three Channel, 16-Bit, 45 MSPS Digital Copier Analog Front End with Integrated CCD/CIS Sensor Timing Generator and LVDS Output 		Click link to Download

Features
•LVDS/CMOS Outputs
•LVDS/CMOS Pixel Rate Input Clock or ADC Input Clock
•CDS or S/H Processing for CCD or CIS sensors
•Independent Gain/Offset Correction for Each Channel
•Digital Black Level Correction Loop for Each Channel
•Programmable Input Clamp Voltage
•Flexible CCD/CIS Sensor Timing Generator

Description

The LM98714 is a fully integrated, high performance 16-Bit, 45 MSPS signal processing solution for digital color copiers, scanners, and other image processing applications. High-speed signal throughput is achieved with an innovative architecture utilizing Correlated Double Sampling (CDS), typically employed with CCD arrays, or Sample and Hold (S/H) inputs (for Contact Image Sensors and CMOS image sensors). The signal paths utilize 8 bit Programmable Gain Amplifiers (PGA), a +/-9-Bit offset correction DAC and independently controlled Digital Black Level correction loops for each input. The PGA and offset DAC are programmed independently allowing unique values of gain and offset for each of the three inputs. The signals are then routed to a 45MHz high performance analog-to-digital converter (ADC). The fully differential processing channel shows exceptional noise immunity, having a very low noise floor of -74dB. The 16-bit ADC has excellent dynamic performance making the LM98714 transparent in the image reproduction chain.

Key Specification

Maximum Input Level

1.2 or 2.4 Volt Modes
 

(both with + or - polarity option)

ADC Resolution

16-Bit

ADC Sampling Rate

45 MSPS

INL

+/- 23 LSB (typ)

Channel Sampling Rate

15/22.5/30 MSPS

PGA Gain Steps

256 Steps

PGA Gain Range

0.7 to 7.84x

Analog DAC Resolution

+/-9 Bits

Analog DAC Range

+/-300mV or +/-600mV

Digital DAC Resolution

+/-6 Bits

Digital DAC Range

-1024 LSB to + 1008 LSB

SNR

-74dB (@0dB PGA Gain)

Power Dissipation

505mW (LVDS) 610mW (CMOS)

Operating Temp

0 to 70°C

Supply Voltage

3.3V Nominal (3.0V to 3.6V range)

Applications
•Multi-Function Peripherals
•Facsimile Equipment
•Flatbed or Handheld Color Scanners
•High-speed Document Scanner
Also Recommended
LM98519▲For A 6-channel AFE, With CMOS Outputs
LM98620▲For A 6-channel AFE, With LVDS Outputs
LM98725▲For A Higher Speed, More Feature-rich Product



MY BRIEFCASE                                     Remove all from My Briefcase 
Click any "Briefcase" icon to add an item

                                              LM98714
Drag-Select for Table Reset Graph
Also Recommended
LM98519▲For A 6-channel AFE, With CMOS Outputs
LM98620▲For A 6-channel AFE, With LVDS Outputs
LM98725▲For A Higher Speed, More Feature-rich Product

Typical Application
click for larger image


Block Diagram
click for larger image


Paramaters / ValuesLM98714 LM98519 LM98620 LM98725
Input Channels3 6 6 3
ADC Sampling Rate45 MSPS 65 MSPS 70 MSPS 81 MSPS
Channel Sampling Rate (MSPS)15 to 30 5 to 32.5 5 to 35 3 to 30
ADC Resolution16 bits 10 bits 10 bits 16 bits
Input Signal PolarityBoth Negative Both Pos, Neg Both Pos, Neg
Input Sampler TypeBoth SH, CDS Both SH, CDS Both SH, CDS Both SH, CDS
Integrated Timing GeneratorYes No No Yes
Output TypeBoth LVDS, CMOS CMOS LVDS Both LVDS, CMOS
Input Voltage Swing (Max)2.4 Volt 1.19 Volt 1.2 Volt 2.3 Volt
INL (+/-)23 LSB 0.9 LSB 0.8 LSB 23 LSB
Noise Floor-74 dB -67.5 dB -68.5 dB -76 dB
PGA Gain Resolution8 bits 9 bits 9 bits 8 bits
PGA Gain (Min)-3 dB 0 dB 0 dB -4.2 dB
PGA Gain (Max)17.9 dB 26 dB 26 dB 18.4 dB
DAC Offset Resolution (+/-)9 bits 14 bits 14 bits 9 bits
DAC Offset Range (+/-)600 mV 337 mV 340 mV 307 mV
Supply Voltage3.3 Volt 3.3 Volt 3.3 Volt 3.3 Volt
Power Dissipation0.505 Watt 1.04 Watt 1.02 Watt 0.755 Watt

Datasheets
TitleSizeDateOther
Language
LM98714 Three Channel, 16-Bit, 45 MSPS Digital Copier Analog Front End with Integrated CCD/CIS Sensor Timing Generator and LVDS Output599
Kbytes		12-Oct-06 


Featured Application Notes
TitleSizeDateOther
Language
AN-1538: Application Note 1538 Interfacing National’s DS90CR218A and LM98714280
Kbytes		17-Mar-07 中文

Part Number(s)
(NSID)		Top ViewAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LM98714BCMT/NOPB

RoHS Status



TSSOP		Full production
Lead Time: 12 weeks

Samples
DistributorRegionQty
ARROWWorldwide38
DIGIKEYWorldwide43
NEWARKAmericas13
$17.00 each at 25+ pcsrail
of
38
LM98714BCMTX/NOPB

RoHS Status



TSSOP		Full production
Lead Time: 16 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$17.00 each at 25+ pcsreel
of
1000

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

National's certificate of product compliance is located at RoHS Status.

Part Number(s)
(NSID)		DescriptionAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LM98714EB01
evaluation boardFull production
Lead Free (RoHS)

 
DistributorRegionQty
DIGIKEYWorldwide0
$500.00 each1

Part Number(s)
(NSID)		Top ViewTypePinsMSL RatingPeak ReflowRoHS
Status		CAD SymbolsModelsPackage
Marking
Format
LM98714BCMT/NOPB
TSSOP482260DetailDownload
LM98714.ibs		NSUZXYTTE#
LM98714
BCMT
LM98714BCMTX/NOPB
TSSOP482260DetailDownload
LM98714.ibs		NSUZXYTTE#
LM98714
BCMT

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

National's certificate of product compliance is located at RoHS Status.

CAD Symbols and Models
Download LM98714 CAD Symbols
 Models

LM98714.ibs

[Information as of 9-Feb-2010]