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LM98640 bảng dữ liệu(PDF) 1 Page - Texas Instruments |
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LM98640 bảng dữ liệu(HTML) 1 Page - Texas Instruments |
1 / 46 page LM98640 www.ti.com SNAS596A – JUNE 2012 – REVISED MAY 2013 LM98640 Dual Channel, 14-Bit, 40 MSPS Analog Front End with LVDS Output Check for Samples: LM98640 1 FEATURES APPLICATIONS 2 • Seialized LVDS Outputs • Focal Plane Electronics • LVDS Input Clock • Imaging Attitude Control Systems • CDS or S/H Processing for CCD or CIS • Assembly Line Vision Systems Sensors • Factory Automation Vision Systems • Programmable Analog Gain for Each Channel • High-speed Document Scanner • Programmable Analog Offset Correction • Multi- Function Peripherals • Programmable Input Clamp Voltage DESCRIPTION • Programmable Sampling Edge up to 1/64th The LM98640 is a fully integrated, high performance Pixel Period 14-bit, 5 MSPS to 40 MSPS signal processing solution for image processing applications. The Serial KEY SPECIFICATIONS LVDS Output format performs well during ionizing • Input Level: 2.85 Volts doses, preventing data loss. The LM98640 has an adaptive power scaling feature to optimize power • ADC Resolution: 14 Bit consumption based on the operating frequency and • ADC Sampling Rate: 5 MSPS to 40 MSPS amount of gain required. High-speed signal • INL @ 15 MHz: ±3.5 LSB throughput is achieved with an innovative architecture • CDS or S/H Gain: 0 dB or 6 dB utilizing Correlated Double Sampling (CDS), typically employed with CCD arrays, or Sample and Hold • PGA Gain Steps: 256 Steps (S/H) inputs (for Contact Image Sensors and CMOS • PGA Gain Range: -3 dB to 18 dB image sensors). The sampling edges are • Coarse DAC Resolution: ±8 Bits programmable to a resolution of 1/64th of a pixel period. Both the CDS and S/H have a programmable • Coarse DAC Range: ±250 mV gain of either 0 dB or 6 dB. The signal paths utilize • Fine DAC Resolution: ±8 Bits two ±8 bit offset correction DACs for coarse and fine • Fine DAC Range: ±5 mV offset correction, and 8 bit Programmable Gain Amplifiers (PGA) for each channel. The PGA and • Noise Floor: -79 dB offset DAC are programmed independently allowing • Crosstalk: -80dB unique values of gain and offset for each input. The • Power Consumption signals are then routed to two on chip 14-bit 40 MHz high performance analog-to-digital converters (ADC). • PGA 1-4x Gain: The fully differential processing channel provides – 125 mW per Channel (15 MSPS) exceptional noise immunity, having a very low noise – 140 mW per Channel (25 MSPS) floor of -79 dB with a gain of 1x. The 14-bit ADCs • PGA 1-8x Gain: have excellent dynamic performance making the LM98640 transparent in the image reproduction – 125 mW per Channel (15 MSPS) chain. – 178 mW per Channel (40 MSPS) • Supply Voltages: – 3.3V Nominal (3.15V to 3.45V Range) – 1.8V Nominal (1.7V to 1.9V Range) 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2012–2013, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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