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

Datasheet	Packaging	Samples & Pricing	Eval. Boards	Models	Knowledge Base

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

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)

General 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. More...

Applications

•	Multi-Function Peripherals
•	Facsimile Equipment
•	Flatbed or Handheld Color Scanners
•	High-speed Document Scanner

Typical Application

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Parametric Table expand

Parametric Table collapse

Input Channels 3

ADC Sampling Rate 45 MSPS

ADC Resolution 16 bits

Input Signal Polarity Both

Input Sampler Type Both SH, CDS

Input Channels 3

ADC Sampling Rate 45 MSPS

Channel Sampling Rate (MSPS) 15 to 30

ADC Resolution 16 bits

Input Signal Polarity Both

Input Sampler Type Both SH, CDS

Integrated Timing Generator Yes

Output Type Both LVDS, CMOS

Input Voltage Swing (Max) 2.4 Volt

INL (+/-) 23 LSB

Noise Floor -74 dB

PGA Gain Resolution 8 bits

PGA Gain (Min) -3 dB

PGA Gain (Max) 17.9 dB

DAC Offset Resolution (+/-) 9 bits

DAC Offset Range (+/-) 600 mV

Supply Voltage 3.3 Volt

Power Dissipation 0.505 Watt

View Using Catalog

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

Block Diagram

click for larger image

Datasheet

RoHS Compliance Information	Size in Kbytes	Date
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	Download

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Package Availability, Models, Samples & Pricing

Part Number

Package

Factory Lead Time

Models

Samples &
Electronic
Orders

Budgetary Pricing

Std
Pack
Size

Package
Marking
Format

Type

Pins

Spec.

MSL
Rating

Peak
Reflow

RoHS
Report

CAD
Symbols

Weeks

Qty

$US each

LM98714EB01

evaluation board

Full production

N/A

$500.00

8 weeks

N/A

LM98714BCMT

TSSOP

NOPB

260

RoHS

N/A

Full production

LM98714.ibs

25+

$17.00

rail
of
38

NSUZXYTT
LM98714
BCMT

6 weeks

500

LM98714BCMTX

TSSOP

NOPB

260

RoHS

N/A

Full production

LM98714.ibs

25+

$17.00

reel
of
1000

NSUZXYTT
LM98714
BCMT

16 weeks

N/A

General 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.

Application Notes

Title	Size in Kbytes	Date
AN-1538: Application Note 1538 Interfacing National’s DS90CR218A and LM98714	280 Kbytes	17-Mar-07	Download
AN-1538 (Chinese): Application Note 1538 Interfacing National’s DS90CR218A and LM98714	281 Kbytes

If you have trouble printing or viewing PDF file(s), see Printing Problems.

[Information as of 4-Jul-2009]