Texas Instruments LM98714CCMTX

Overview

LM98714CCMTX from Texas Instruments is a three-channel, 16-bit, 45 MSPS analog front end (AFE) with integrated CCD/CIS sensor timing generator and LVDS/CMOS output. It performs correlated double sampling (CDS) or sample-and-hold (S/H), independent per-channel gain/offset correction, and digital black level correction - designed for high-fidelity color image capture in flatbed and document scanners.

For engineers reviewing the LM98714CCMTX datasheet, LM98714CCMTX pinout, LM98714CCMTX application, or LM98714CCMTX equivalent, this device supports precise pixel-rate timing control, programmable clamp voltage, ±9-bit analog offset DAC, 256-step PGA (0.7–7.84×), and configurable 3-/2-/1-channel sampling modes up to 45 MSPS aggregate throughput.

Technical Context

The LM98714CCMTX implements a fully differential signal path with CDS/S/H selection per channel, independent 8-bit PGA and ±9-bit analog DAC per input, and a shared 16-bit 45 MSPS ADC. Its timing generator provides ten programmable CMOS outputs (CLK1–CLK10) and supports LVDS or CMOS clock input via INCLK+/INCLK−.

It operates in three AFE modes: Mode 3 (3-channel synchronous sampling at 15 MSPS/channel), Mode 2 (2-channel at 22.5 MSPS/channel), and Mode 1 (1-channel sequential line sampling). Each mode uses SH-driven pixel synchronization and supports automatic or manual black level correction per channel.

Key Specifications

Pinout & Package

LM98714CCMTX is housed in a 48-pin TSSOP package (12.50 mm × 6.1 mm body size), optimized for compact scanner PCB layouts with separate analog/digital ground planes and dedicated power bypassing per supply domain.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar analog front end applications.

Compared with LM98722CIMT and TDA0370H/N1, the LM98714CCMTX delivers higher resolution (16-bit vs. 14-bit), faster aggregate throughput (45 MSPS vs. ≤40 MSPS), LVDS/CMOS dual-mode output, and programmable VCLP - making it the only option supporting high-fidelity color scanning with flexible sensor timing and noise-resilient data transmission.

Availability

LM98714CCMTX is available at Aetrix Electronics and suitable for flatbed color scanners, multi-function peripherals, high-speed document scanners, and facsimile equipment requiring stable component supply across extended production lifecycles.

Supply support for LM98714CCMTX includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies for industrial, automotive, and communications markets.

The LM98714CCMTX belongs to TI's high-performance imaging AFE product line, engineered specifically for professional-grade document and photo scanning systems demanding precision analog signal integrity, flexible timing control, and robust digital output interfaces.

FAQ

What is the primary function of the LM98714CCMTX in a scanner system?

The LM98714CCMTX serves as the complete analog front end and timing generator for CCD or CIS image sensors. It conditions analog RGB signals via CDS or S/H, applies per-channel gain and offset correction, digitizes at 16-bit resolution up to 45 MSPS, and generates all required sensor control clocks - eliminating the need for multiple discrete components in LM98714CCMTX-based scanner designs.

Does the LM98714CCMTX support both LVDS and CMOS digital outputs simultaneously?

No, the LM98714CCMTX supports LVDS or CMOS output mode - selected at power-up via the INCLK− pin state (LVDS when differential, CMOS when tied to DGND). The output interface is mutually exclusive; both cannot be active at once. This design choice ensures optimal signal integrity for either high-speed differential or low-cost single-ended system interconnects in the LM98714CCMTX application.

How does the LM98714CCMTX handle black level correction across its three channels?

The LM98714CCMTX implements independent digital black level correction loops for each of its three channels (OSR, OSG, OSB). Each loop can operate in Manual Mode (user-programmed offset DAC values) or Automatic Mode, where the device measures optical black pixels and dynamically updates the per-channel offset DAC register. This ensures consistent black-level stability across temperature and aging in LM98714CCMTX-based imaging systems.

What are the key timing generator capabilities of the LM98714CCMTX?

The LM98714CCMTX integrates a flexible 10-output timing generator with programmable polarity, delay, and duty cycle per output (CLK1–CLK10). It supports common CCD/CIS waveforms including Φ1A, Φ2A, ΦB, ΦC, RS, and CP - configured via internal registers. The SH output provides pixel-synchronized transfer pulses, and CLKOUT serves as a data-strobe reference in CMOS mode, making the LM98714CCMTX self-contained for sensor timing.

Can the LM98714CCMTX operate with different sensor types and sampling configurations?

Yes, the LM98714CCMTX supports three distinct AFE modes: Mode 3 (3-channel synchronous sampling at 15 MSPS/channel), Mode 2 (2-channel at 22.5 MSPS/channel for even/odd CIS), and Mode 1 (1-channel sequential line sampling up to 30 MSPS). Each mode is register-configurable and supports both CDS (for CCD) and S/H (for CIS/CMOS) input architectures - enabling one LM98714CCMTX design to serve diverse sensor platforms.