LM98513BCMTX/NOPB

Analog Front End (AFE) Overview

The LM98513BCMTX/NOPB is a dual-channel, 10-bit, 50 MSPS copier signal processor designed for digital imaging applications. It integrates sample and hold circuits, programmable gain amplifiers (PGA), offset correction DACs, and analog-to-digital converters (ADC). The device operates on a single 3V supply with typical power dissipation of 415 mW at 3.0V. Key electrical parameters include a maximum input level of 1.5 V peak-peak, PGA gain range of 0.0 to 20.0 dB in 256 steps, and an ADC sampling rate of 25 MSPS per channel. The noise floor is -68 dB at 0.0 dB gain with a 1.5 V input.

Analog Front End (AFE) Feature Summary

• Dual-channel architecture with independent 8-bit PGA and offset DACs for each channel
• 10-bit ADCs operating at 25 MSPS with 50 MSPS digitally multiplexed output
• Digital black level clamp and averaging circuitry for offset correction
• 4-wire serial interface for configuration of gain, offset, and control registers

Analog Front End (AFE) Applications

• Digital plain paper copiers
• Multi-function printers
• Flatbed or handheld color scanners
• High-speed document scanners

Analog Front End (AFE) Procurement Notes

Verify the manufacturer origin as the datasheet indicates National Semiconductor Corporation, while the part number suffix suggests Texas Instruments distribution or acquisition. Confirm the package type is TSSOP-56 and the temperature range is commercial (0°C to +70°C). Ensure the source document matches the Rev 3.3 March 2005 specification for accurate pinout and timing details.

Analog Front End (AFE) Selection Notes

Select this component for CCD-based imaging systems requiring low-noise analog processing. The dual-channel design supports even/odd pixel correction. Ensure the system provides a 25 MHz master clock (MCLK) and AC-couples inputs via 0.1 µF capacitors. The 3V single-supply requirement simplifies power management compared to dual-supply alternatives.

Analog Front End (AFE) Part Context

This component belongs to the LM98513 family of copier signal processors. It was originally developed by National Semiconductor Corporation before being acquired by Texas Instruments. The 'BCMT' suffix denotes the commercial temperature grade and TSSOP-56 package variant.

Analog Front End (AFE) Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should verify compatibility with existing CCD sensor drivers and timing generators when considering alternative devices.