LM98620VHB National Semiconductor, LM98620VHB Datasheet

LM98620VHB

Manufacturer Part Number

LM98620VHB

Description

Manufacturer

National Semiconductor

Datasheet

1.LM98620VHB.pdf (6 pages)

Specifications of LM98620VHB

Mounting

Surface Mount

Package Type

TQFP

Lead Free Status / RoHS Status

Supplier Unconfirmed

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LM98620

10-bit 70 MSPS 6 Channel Imaging Signal Processor with

LVDS Output

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 chan-

nel 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 am-

plifier. These correction values can be controlled by an auto-

mated Digital Black Level correction loop. The PGA and offset

DACs for each channel are programmed independently al-

lowing 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.

Features

■

System Block Diagram

3.3V Single Supply Operation

CDS or S/H Processing

35 MHz Channel Rate

Enhanced ESD Protection on Timing, Control and LVDS

Pins

300323

■

Key Specifications

■

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

Maximum Input Level

Input Sample Rate

PGA Gain Range

CDS/SH Gain Settings

Total Channel Gain

PGA Gain Resolution

ADC Resolution

ADC Sampling Rate

SNR

Offset DAC Range

Offset DAC Resolution

Supply voltage

Power Dissipation

±111 mV or ±59.5 mV- FDAC

0.58 Vp-p (CDS gain = 2.0)

10 to 35 MSPS - 3ch mode

1.2 Vp-p (CDS gain = 1.0)

5 to 35 MSPS - 6ch mode

1x to 10x (0 to 20 dB)

1x to 21x (0 to 26 dB)

68.5 dB (Gain = 1x)

February 21, 2008

±281 mV - CDAC

±10 bits - FDAC

1.02 W (typical)

10 to 70 MSPS

±4 bits - CDAC

8 bits - Analog

www.national.com

30032304

3.0V to 3.6V

1x or 2.1x

10 bits

Related parts for LM98620VHB

LM98620VHB Summary of contents

Page 1

... CDS or S/H Processing ■ 35 MHz Channel Rate ■ Enhanced ESD Protection on Timing, Control and LVDS Pins System Block Diagram © 2008 National Semiconductor Corporation ■ Low Power CMOS Design ■ 12 pin to 16 pin (selectable) LVDS serialized data output ■ 4-Wire Serial interface ■ ...

Page 2

Chip Block Diagram www.national.com 2 30032301 ...

Page 3

... Channel Block Diagram Ordering Information Commercial Temperature NS Package Range LM98620VHB 80-Pin TQFP 3 30032302 www.national.com ...

Page 4

www.national.com 4 ...

Page 5

Physical Dimensions inches (millimeters) unless otherwise noted 80-Lead TQFP NS Package Number VHB80A 5 www.national.com ...

Page 6

... For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock Conditioners www.national.com/timing Data Converters www.national.com/adc Displays www.national.com/displays Ethernet www.national.com/ethernet Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www ...

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