Analog Devices Inc. LTC2335CLX-16#PBF

Overview

LTC2335CLX-16#PBF from Analog Devices (formerly Linear Technology) is a 16-bit, 1 Msps, 8-channel differential successive approximation register (SAR) ADC with SoftSpan™ configurable input ranges (±10.24V, 0–10.24V, ±5.12V, 0–5.12V), 94.4 dB SNR, ±1 LSB INL, and integrated 4.096 V reference buffer. It operates from ±15 V analog supplies and 5 V digital supply, targeting high-voltage industrial signal acquisition in PLCs and power monitoring.

For engineers reviewing the LTC2335CLX-16#PBF datasheet, LTC2335CLX-16#PBF pinout, LTC2335CLX-16#PBF application, or LTC2335CLX-16#PBF equivalent, key selection criteria include guaranteed no-missing-codes at 16 bits, rail-to-rail input overdrive tolerance, 118 dB CMRR for noisy environments, and dual-mode SPI CMOS/LVDS serial interface compatibility with 1.8–5 V or 2.4–5.25 V OVDD.

Technical Context

The LTC2335CLX-16#PBF implements a true SAR architecture with no pipeline delay or cycle latency, enabling deterministic timing for real-time control loops. Its programmable sequencer supports per-conversion range selection across all eight channels without host intervention.

Analog inputs feature a wide common mode range (VEE to VCC – 4 V) and 125 dB active crosstalk suppression, allowing direct digitization of bipolar/unipolar signals in mixed-supply systems. The internal reference buffer delivers 4.096 V with 5 ppm/°C max drift and supports external overdrive for enhanced accuracy.

Key Specifications

Pinout & Package

48-lead (7 mm × 7 mm) LQFP package with exposed pad; thermal resistance θ_JA = 53°C/W. All GND pins (15, 18, 20, 25, 30, 36, 41, 44, 46) must be soldered to a solid ground plane for optimal noise performance and thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-resolution SAR ADC applications.

Compared with AD7606C-16 and ADS8688, the LTC2335CLX-16#PBF uniquely combines per-conversion SoftSpan™ range reconfiguration, 118 dB CMRR, and pin-selectable LVDS/CMOS I/O-enabling single-chip adaptation to diverse sensor types and harsh EMI environments without redesign.

Availability

LTC2335CLX-16#PBF is available at Aetrix Electronics and suitable for programmable logic controllers, industrial process control systems, and power line monitoring equipment requiring stable component supply, long-term manufacturability, and guaranteed C-grade temperature performance.

Supply support for LTC2335CLX-16#PBF 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

Analog Devices acquired Linear Technology in 2017 and maintains its precision analog portfolio, emphasizing high-performance signal chain solutions for industrial, instrumentation, and aerospace markets.

The LTC2335-16 product line was designed specifically for high-voltage, multi-channel industrial data acquisition-delivering flexible input scaling, exceptional noise immunity, and deterministic timing in compact LQFP packaging.

FAQ

What input voltage ranges does the LTC2335CLX-16#PBF support per channel?

The LTC2335CLX-16#PBF supports four SoftSpan™ input ranges on a per-conversion basis: ±10.24 V, 0–10.24 V, ±5.12 V, and 0–5.12 V. These are configured via SPI register writes and do not require hardware changes. Each channel can independently select any of these ranges during sequence operation, enabling mixed-signal acquisition without external multiplexers or gain stages.

Does the LTC2335CLX-16#PBF require an external reference?

No-the LTC2335CLX-16#PBF integrates a 2.048 V bandgap reference (REFIN) and a buffered 4.096 V output (REFBUF), eliminating the need for external references in most applications. However, REFIN accepts external overdrive (1.25–2.2 V) for improved initial accuracy and temperature stability, making the LTC2335CLX-16#PBF adaptable to metrology-grade requirements.

How does the LTC2335CLX-16#PBF handle input common-mode voltage variations?

The LTC2335CLX-16#PBF accepts input common-mode voltages from VEE to VCC − 4 V (e.g., −15 V to +11 V with ±15 V supplies), with 118 dB typical CMRR. This allows direct connection to sensors with floating grounds or mismatched supply domains. Its differential architecture rejects common-mode noise without requiring matched external resistor networks.

What is the power consumption of the LTC2335CLX-16#PBF at full throughput?

At 1 Msps sampling rate in acquisition mode, the LTC2335CLX-16#PBF consumes 182 mW typical (224 mW max) with CMOS I/O and 204 mW typical (248 mW max) with LVDS I/O. In Nap mode, power drops to ~125 mW (CMOS) or ~151 mW (LVDS); in Power Down mode, it falls to ≤1 μA (C-grade), enabling ultra-low-power wake-on-event architectures.

Is the LTC2335CLX-16#PBF pin-compatible with other members of the LTC2335 family?

Yes-the LTC2335CLX-16#PBF shares identical 48-lead LQFP pinout and footprint with LTC2335ILX-16#PBF (−40°C to +85°C) and LTC2335HLX-16#PBF (−40°C to +125°C). Only the temperature grade and part marking differ; all share identical electrical specifications, register maps, and timing behavior-enabling drop-in qualification upgrades.