Texas Instruments LM98519VHB/NOPB

Overview

LM98519VHB/NOPB from Texas Instruments is a 10-bit, 65 MSPS six-channel imaging signal processor for color copiers and flatbed scanners. It integrates CDS/SH sampling, programmable 1×–10× PGA per channel, ±4-bit/±10-bit analog offset DACs, digital white/black level calibration loops, and three high-performance ADCs. Designed for CCD/CMOS sensor interfaces, it delivers 67.5 dB SNR at 1× gain with differential input architecture and 3.3-V single-supply operation.

For engineers reviewing the LM98519VHB/NOPB datasheet, LM98519VHB/NOPB pinout, LM98519VHB/NOPB application, or LM98519VHB/NOPB equivalent, key selection criteria include 6-channel parallel processing capability, CDS/SH gain selectability (1× or 2.1×), independent per-channel gain/offset correction, 80-pin TQFP package compatibility, and support for 10–32.5 MSPS (3-ch) or 5–32.5 MSPS (6-ch) input sampling rates.

Technical Context

The LM98519VHB/NOPB implements a symmetrical 2-channel-per-ADC architecture with three 65-MSPS 10-bit ADCs time-multiplexing six fully differential analog channels. Each channel includes dedicated CDS/SH stage (1× or 2.1× gain), 8-bit PGA (1×–10×), and dual offset DACs (±4-bit CDAC, ±10-bit FDAC) enabling independent black-level and white-level calibration per channel.

Its digital control subsystem supports automated calibration via CLPIN/BLKCLP pulses and AGC_ONB-triggered white-level loop, while the 4-wire serial interface (SCLK/SDI/SDO/SENB) configures registers including AFEPHASE for pixel-aligned sampling timing adjustment. The device operates across 0°C to 70°C with 3.0–3.6 V analog/digital supplies and achieves <1.04 W typical power dissipation in active mode.

Key Specifications

Pinout & Package

LM98519VHB/NOPB uses an 80-pin TQFP package (12.00 mm × 12.00 mm) with exposed thermal pad. Pin functions are validated per TI SNAS425C Rev C datasheet, supporting separate analog/digital/output power domains (VDDA/VDDD/VDDO), six differential analog inputs (OSR1/2, OSG1/2, OSB1/2), and 30-bit parallel LVDS-compatible data outputs (DB0–9, DG0–9, DR0–9).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar imaging signal processor applications.

Compared with LM98519VHB/NOPB, LM98516VHB/NOPB trades resolution and calibration depth for lower cost and power, while AD9945KSTZ offers higher bit depth but reduced per-channel configurability - making LM98519VHB/NOPB optimal for RGB color fidelity-critical 10-bit scanner AFEs.

Availability

LM98519VHB/NOPB is available at Aetrix Electronics and suitable for digital color copiers, flatbed scanners, and medical film digitizers requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for LM98519VHB/NOPB 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 and embedded processing technologies, with over 50 years of innovation in precision signal chain solutions.

The LM98519VHB/NOPB belongs to TI's Imaging Signal Processor product line, engineered specifically for high-fidelity digitization of CCD/CMOS sensor outputs in office automation and industrial imaging equipment.

FAQ

What is the maximum input sampling rate supported by the LM98519VHB/NOPB in six-channel mode?

The LM98519VHB/NOPB supports an input sampling rate of 5 to 32.5 MSPS per channel in six-channel mode, enabling simultaneous digitization of all RGB sensor pairs at up to 32.5 million samples per second. This rate is synchronized to the MCLK input and maintains full 10-bit resolution and 67.5 dB SNR performance as specified in the SNAS425C datasheet.

Does the LM98519VHB/NOPB support both CDS and Sample-and-Hold input architectures?

Yes, the LM98519VHB/NOPB supports both Correlated Double Sampling (CDS) and Sample-and-Hold (SH) modes via hardware-selectable gain settings of 1× or 2.1× in the input stage. The device automatically adapts its internal timing and calibration logic based on the selected mode, and both configurations are validated for use with CCD and CMOS image sensors per TI's application documentation.

How does the digital white-level calibration loop function in the LM98519VHB/NOPB?

The digital white-level calibration loop in the LM98519VHB/NOPB is triggered by a low pulse on the AGC_ONB pin and automatically adjusts the 8-bit PGA gain of each channel to achieve a user-programmed target output code level (e.g., 90% of full scale). This closed-loop operation runs independently per channel and requires no host processor intervention once initiated, ensuring consistent white-point stability across temperature and aging.

What are the power supply requirements for the LM98519VHB/NOPB analog and digital domains?

The LM98519VHB/NOPB requires three independent 3.0–3.6 V supplies: VDDA for analog circuitry (including PGAs and ADCs), VDDD for digital core logic, and VDDO for output drivers. TI specifies that VDDD must be ≥ VDDA and ≥ VDDO, and recommends deriving all three from a common low-noise linear regulator to maintain timing integrity and minimize cross-domain noise coupling.

Can the LM98519VHB/NOPB operate with a single 3.3-V supply across all domains?

Yes, the LM98519VHB/NOPB is fully compatible with a single 3.3-V supply applied to VDDA, VDDD, and VDDO simultaneously, provided the supply meets ripple (<10 mV_pp) and sequencing requirements (all rails powered within 100 ms). This configuration is explicitly validated in the SNAS425C datasheet and used in reference designs for simplified power architecture in space-constrained scanner modules.