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

Typical Application click for larger image	Block Diagram click for larger image

Parameters / Values	LM98714	LM98519	LM98620	LM98725
Input Channels	3	6	6	3
ADC Sampling Rate	45 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 Resolution	16 bits	10 bits	10 bits	16 bits
Input Signal Polarity	Both	Negative	Both Pos, Neg	Both Pos, Neg
Input Sampler Type	Both SH, CDS	Both SH, CDS	Both SH, CDS	Both SH, CDS
Integrated Timing Generator	Yes	No	No	Yes
Output Type	Both 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
PGA Gain Resolution	8 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 Voltage	3.3 Volt	3.3 Volt	3.3 Volt	3.3 Volt
Power Dissipation	0.505 Watt	1.04 Watt	1.02 Watt	0.755 Watt

Datasheets

Title		Size	Date	Other Language
	LM98714 Three Channel, 16-Bit, 45 MSPS Digital Copier Analog Front End with Integrated CCD/CIS Sensor Timing Generator and LVDS Output	599 Kbytes	12-Oct-06

Application Notes

Title		Size	Date	Other Language
	AN-1538: Application Note 1538 Interfacing DS90CR218A with LM98714	280 Kbytes	17-Mar-07	中文

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM98714BCMT/NOPB RoHS Status	TSSOP	Full production Lead Time: 16 weeks	Distributor Region Qty AVNET-EM Worldwide 5957 DIGI-KEY Worldwide 12 MOUSER Worldwide 38	$17.00 each at 100+ pcs	rail of 38
LM98714BCMTX/NOPB RoHS Status	TSSOP	Full production Lead Time: 20 weeks	Distributor Region Qty DIGI-KEY Worldwide 0	$17.00 each at 100+ pcs	reel of 1000

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

Moisture Sensitivity Level Data for LM98714.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM98714 is located at RoHS Status.

Part Number(s) (NSID)	Description	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM98714EB01	evaluation board	Full production	Distributor Region Qty DIGI-KEY Worldwide 0	$500.00 each	1

National Semiconductor follows the provisions of the Product Stewardship Guide for Customers (CSP-9-111C1) and Banned Substances and Materials of Interest Specification (CSP-9-111S2) for regulatory environmental compliance. Details may be found at: www.national.com/en/packaging/greennopb.html. Lead free products are RoHS compliant.

Lead Free product status is available through the search tool located here

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LM98714BCMT/NOPB	201.231	TSSOP	48	2	260	Detail	Download	ibis file	NSUZXYTTE# LM98714 BCMT
LM98714BCMTX/NOPB	201.231	TSSOP	48	2	260	Detail	Download	ibis file	NSUZXYTTE# LM98714 BCMT

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

Moisture Sensitivity Level Data for LM98714.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM98714 is located at RoHS Status.

CAD Symbols and Models Download LM98714 CAD Symbols

Models ibis file