LM98620 - 10-bit 70 MSPS 6 Channel Imaging Signal Processor with LVDS Output

Datasheet	Packaging	Samples & Pricing	Models	Knowledge Base

Features

•	3.3V Single Supply Operation
•	CDS or S/H Processing
•	35 MHz Channel Rate
•	Enhanced ESD Protection on Timing, Control and LVDS Pins
•	Low Power CMOS Design
•	12 pin to 16 pin (selectable) LVDS serialized data output
•	4-Wire Serial interface
•	2 Channel Symmetrical Architecture
•	Independent Gain and Offset Correction for each Channel
•	Digital Black Level Calibration for each Channel
•	Digital White Level Calibration for each Channel
•	Programmable Input Clamp

Key Specification

Maximum Input Level	1.2 Vp-p (CDS gain = 1.0)
	0.58 Vp-p (CDS gain = 2.0)
Input Sample Rate	5 to 35 MSPS - 6ch mode
	10 to 35 MSPS - 3ch mode
PGA Gain Range	1x to 10x (0 to 20 dB)
CDS/SH Gain Settings	1x or 2.1x

Total Channel Gain	1x to 21x (0 to 26 dB)
PGA Gain Resolution	8 bits - Analog
ADC Resolution	10 bits
ADC Sampling Rate	10 to 70 MSPS
SNR	68.5 dB (Gain = 1x)
Offset DAC Range	±111 mV or ±59.5 mV- FDAC
	±281 mV - CDAC
Offset DAC Resolution	±10 bits - FDAC
	±4 bits - CDAC
Supply voltage	3.0V to 3.6V
Power Dissipation	1.02 W (typical)

General Description

The LM98620 is a fully integrated, 10-Bit, 70 MSPS signal processing solution for high performance digital color copiers, scanners, and other image processing applications. More...

Parameters Values

Input Channels 6

ADC Sampling Rate 70 MSPS

Channel Sampling Rate (MSPS) 5 to 35

ADC Resolution 10 bits

Input Signal Polarity Both Pos, Neg

Input Sampler Type Both SH, CDS

Integrated Timing Generator No

Output Type LVDS

Input Voltage Swing (Max) 1.2 Volt

INL (+/-) 0.8 LSB

Noise Floor -68.5 dB

PGA Gain Resolution 9 bits

PGA Gain (Min) 0 dB

PGA Gain (Max) 26 dB

DAC Offset Resolution (+/-) 14 bits

DAC Offset Range (+/-) 340 mV

Supply Voltage 3.3 Volt

Power Dissipation 1.02 Watt

Block Diagram

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System Block Diagram

Datasheet

RoHS Compliance Information	Size in Kbytes	Date
LM98620 10-bit 70 MSPS 6 Channel Imaging Signal Processor with LVDS Output	151 Kbytes	21-Feb-08	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

LM98620VHB

TQFP

NOPB

260

RoHS

N/A

Full production

LM98620.ibs

1K+

$19.50

tray
of
119

NSUZXYTTE#
LM98620VHB

16 weeks

N/A

General Description

The LM98620 is a fully integrated, 10-Bit, 70 MSPS signal processing solution for high performance digital color copiers, scanners, and other image processing applications. High-speed signal throughput is achieved with an innovative six channel architecture utilizing Correlated Double Sampling (CDS), or Sample and Hold (SH) type sampling. 1x or 2x gain settings are available in the CDS/SH input stage. Each channel has a dedicated 1x to 10x (8 bit) PGA that allows accurate gain adjustment of each channel. The Digital White Level auto calibration loop can automatically set the PGA value to achieve a selected white target level. Each channel also has a ±4 bit coarse and ±10-bit fine analog offset correction DAC that allows offset correction before the sample-and-hold amplifier. These correction values can be controlled by an automated Digital Black Level correction loop. The PGA and offset DACs for each channel are programmed independently allowing unique values of gain and offset for each of the six channels. A 2-to-1 multiplexing scheme routes the signals to three 70MHz high performance ADCs. The fully differential processing channels achieve exceptional noise immunity, having a very low noise floor of -68.5dB. The 10-bit analog-to-digital converters have excellent dynamic performance making the LM98620 transparent in the image reproduction chain.

[Information as of 8-Nov-2009]