Texas Instruments ADC08351CILQX/NOPB

Overview

ADC08351CILQX/NOPB from Texas Instruments is an 8-bit, 42 MSPS analog-to-digital converter with internal sample-and-hold, single +3V operation, 7.2 ENOB at 4.4 MHz input, and TRI-STATE digital outputs - designed for video digitization in portable imaging systems requiring low power and minimal external components.

For engineers reviewing the ADC08351CILQX/NOPB datasheet, ADC08351CILQX/NOPB pinout, ADC08351CILQX/NOPB application, or ADC08351CILQX/NOPB equivalent, key selection considerations include its 40 mW active power consumption, 20-pin TSSOP/WQFN packaging, guaranteed no missing codes, 4.4 MHz full-power bandwidth support, and compatibility with ac-coupled video signal chains in medical imaging and digital camcorder designs.

Technical Context

The ADC08351CILQX/NOPB employs a pipeline architecture with 2.5-clock-cycle latency and sampling triggered on the falling edge of CLK. Its analog input features dynamic capacitance (4 pF low, 11 pF high) and self-biasing via 18 kΩ/12 kΩ resistive divider to VREF and AGND, enabling both ac- and dc-coupled inputs without external bias networks.

It integrates a reference ladder with 0.0665×VREF to 0.7468×VREF full-scale range, supports VREF from 0.75 V to VA, and delivers 7.2 effective bits at fCLK = 42 MHz / fIN = 4.4 MHz - verified under TA = −40°C to +85°C, VA = VD = +3.0 V, and CL = 20 pF load conditions.

Key Specifications

Pinout & Package

ADC08351CILQX/NOPB is available in a 20-pin TSSOP (PW package) and 24-pin WQFN (RGE package); this variant uses the 20-pin TSSOP. Package dimensions: 6.5 mm × 4.4 mm × 1.2 mm, lead pitch 0.65 mm, moisture sensitivity level 2a.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit, 40+ MSPS ADC applications.

Compared with ADS820U and MAX1186EEE+, the ADC08351CILQX/NOPB uniquely combines 42 MSPS speed, 3 V operation, internal S/H, and sub-7 mW power-down - making it optimal for space- and energy-constrained portable video and imaging platforms where timing precision and thermal management are critical.

Availability

ADC08351CILQX/NOPB is available at Aetrix Electronics and suitable for video digitization, digital still cameras, and medical imaging systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for ADC08351CILQX/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, embedded processing, and connectivity technologies, with over 90 years of innovation in precision data conversion and signal chain solutions.

The ADC08351CILQX/NOPB belongs to TI's high-speed, low-power ADC portfolio targeting portable video, imaging, and communications - engineered for minimal external components, single-supply operation, and robust performance across industrial temperature ranges.

FAQ

What is the maximum input frequency supported by ADC08351CILQX/NOPB before ENOB drops below 7 bits?

The ADC08351CILQX/NOPB maintains 7.2 ENOB at fIN = 4.4 MHz with fCLK = 42 MHz. At fIN = 21 MHz, ENOB falls to 6.8 bits (min), and drops further to 6.1 bits at the same clock rate. Therefore, for sustained ≥7-bit effective resolution, the maximum recommended input frequency is 4.4 MHz - confirmed in the Electrical Characteristics table under "ENOB" test conditions.

Does ADC08351CILQX/NOPB require an external reference voltage source?

No - ADC08351CILQX/NOPB accepts an externally applied reference voltage at VREF (Pin 14), but does not include an internal reference. The device operates with VREF between 0.75 V and VA (up to +3.6 V), and TI recommends using VREF = 2.4 V for optimal performance. A stable, low-noise reference source with sufficient current drive (≥7.7 mA) is required.

Can ADC08351CILQX/NOPB operate with ac-coupled analog inputs?

Yes - ADC08351CILQX/NOPB includes internal 18 kΩ pull-up to VREF and 12 kΩ pull-down to AGND, establishing a self-biased input common-mode level. This allows direct ac-coupling of video or CCD signals without external bias networks, though dc-coupling is preferred for best SNR performance per the Applications Information section.

What is the pipeline latency of ADC08351CILQX/NOPB, and how does it affect system timing?

The ADC08351CILQX/NOPB has a fixed pipeline latency of 2.5 clock cycles plus tOD (14–19 ns). For example, at 42 MHz (23.8 ns period), total latency is ≈84 ns. This deterministic delay enables precise synchronization in frame-based video systems and time-critical electro-optic measurements - confirmed in the AC Electrical Characteristics table under "Pipline Delay (Latency)".

Is ADC08351CILQX/NOPB pin-compatible with other members of the ADC083xx family?

No - ADC08351CILQX/NOPB uses a unique 20-pin TSSOP (PW) or 24-pin WQFN (RGE) footprint. Other ADC083xx variants (e.g., ADC08320, ADC08350) differ in resolution, speed, and pinout. Pin compatibility is not claimed in the datasheet, and layout reuse requires verification against each device's specific Pin Configuration diagrams and pin descriptions.