LM98722

更新时间： 2024-09-25 05:42:23

品牌	Logo	应用领域
美国国家半导体 - NSC		时钟发生器传感器
页数	文件大小	规格书
14页	453K
描述
3 Channel, 16-Bit, 45 MSPS Analog Front End with LVDS/CMOS Output, Integrated CCD/CIS Sensor Timing Generator and Spread Spectrum Clock Generation

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LM98722 数据手册

September 24, 2009

LM98722

3 Channel, 16-Bit, 45 MSPS Analog Front End with LVDS/

CMOS Output, Integrated CCD/CIS Sensor Timing

Generator and Spread Spectrum Clock Generation

General Description

Features

The LM98722 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 archi-

tecture utilizing Correlated Double Sampling (CDS), typically

employed with CCD arrays, or Sample and Hold (S/H) inputs

(for higher speed CCD or 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 analog

inputs. The signals are then routed to a 45MHz high perfor-

mance analog-to-digital converter (ADC). The fully differential

processing channel shows exceptional noise immunity, hav-

ing a very low noise floor of -74dB. The 16-bit ADC has

excellent dynamic performance making the LM98722 trans-

parent in the image reproduction chain.

LVDS/CMOS Outputs

■

LVDS/CMOS/Crystal Clock Source with PLL Multiplication

Integrated Flexible Spread Spectrum Clock Generation

CDS or S/H Processing for CCD or CIS sensors

Independent Gain/Offset Correction for Each Channel

Automatic per-Channel Gain and Offset Calibration

Programmable Input Clamp Voltage

Flexible CCD/CIS Sensor Timing Generator

Key Specifications

Maximum Input Level

1.2 or 2.4 Volt Modes

(both with + or - polarity option)

16-Bit

■

ADC Resolution

ADC Sampling Rate

INL

45 MSPS

+18/-25 LSB (typ)

22.5/22.5/15 MSPS

256 Steps

Channel Sampling Rate

PGA Gain Steps

PGA Gain Range

Analog DAC Resolution

Analog DAC Range

Digital DAC Resolution

Digital DAC Range

SNR

A very flexible integrated Spread Spectrum Clock Generation

(SSCG) modulator is included to assist with EM compliance

and reduce system costs.

0.64 to 8.3x

+/-9 Bits

+/-307mV or +/-614mV

+/-6 Bits

Applications

Multi-Function Peripherals

■

-2048 LSB to + 2016 LSB

-74dB (@0dB PGA Gain)

630mW (LVDS)

0 to 70°C

High-speed Currency/Check Scanners

Flatbed or Handheld Color Scanners

Power Dissipation

Operating Temp

Supply Voltage

High-speed Document Scanners

3.3V Nominal (3.0V to 3.6V range)

System Block Diagram

30099570

300995

www.national.com

12 3 4 5 6 7...14

中文翻译

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与LM98722相关器件

型号	品牌	获取价格	描述	数据表
LM98722CCMT	NSC	获取价格	IC SPECIALTY ANALOG CIRCUIT, PDSO56, TSSOP-56, Analog IC:Other
LM98722CCMT/NOPB	NSC	获取价格	IC SPECIALTY ANALOG CIRCUIT, PDSO56, ROHS COMPLIANT, TSSOP-56, Analog IC:Other
LM98722CCMT/NOPB	ROCHESTER	获取价格	SPECIALTY ANALOG CIRCUIT, PDSO56, ROHS COMPLIANT, TSSOP-56
LM98722CCMT/NOPB	TI	获取价格	具有 LVDS/CMOS 输出和集成 CCD/CIS 传感器定时发送器的 3 通道 16
LM98722CCMTX	NSC	获取价格	IC SPECIALTY ANALOG CIRCUIT, PDSO56, TSSOP-56, Analog IC:Other
LM98722CCMTX/NOPB	NSC	获取价格	IC SPECIALTY ANALOG CIRCUIT, PDSO56, ROHS COMPLIANT, TSSOP-56, Analog IC:Other
LM98722CCMTX/NOPB	TI	获取价格	具有 LVDS/CMOS 输出和集成 CCD/CIS 传感器定时发送器的 3 通道 16
LM98725	NSC	获取价格	3 Channel, 16-Bit, 81 MSPS Analog Front End with LVDS/CMOS Output, Integrated CCD/CIS Sens
LM98725	TI	获取价格	具有 LVDS/CMOS 输出和集成 CCD/CIS 传感器定时发送器的 3 通道 16
LM98725CCMT/NOPB	TI	获取价格	具有 LVDS/CMOS 输出和集成 CCD/CIS 传感器定时发送器的 3 通道 16

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