Texas Instruments ADS8355IRTER

Overview

ADS8355IRTER from Texas Instruments is a dual, 16-bit, 1-MSPS simultaneous-sampling analog-to-digital converter with integrated programmable 2.5-V internal reference, supporting both single-ended and pseudo-differential inputs. It delivers ±1-LSB INL, 88-dB SNR, and –97-dB THD across –40°C to +125°C, enabling high-fidelity position feedback in servo drives and power quality monitoring.

For engineers reviewing the ADS83535IRTER datasheet, ADS8355IRTER pinout, ADS8355IRTER application, or ADS8355IRTER equivalent, this page provides verified specifications, WQFN-16 package mapping, dual-channel timing alignment (40-ps A/B match), and validated alternatives for industrial analog acquisition systems requiring simultaneous sampling and extended temperature operation.

Technical Context

The ADS8355IRTER integrates two independent SAR ADC cores sharing a flexible serial interface with separate SDO_A/SDO_B outputs, enabling true simultaneous conversion without inter-channel latency. Its REFIO_A/REFIO_B pins support either external references or independently programmable internal REFDACs (0x1FF = 2.5 V).

Input configuration is controlled via the INPUT_CONFIG register: RANGE_SEL selects 0–VREF or 0–2×VREF full-scale range, while AINM_SEL configures single-ended (AINM_x grounded) or pseudo-differential (AINM_x biased at VREF_x/2) operation - both settings applied identically to ADC_A and ADC_B.

Key Specifications

Pinout & Package

ADS8355IRTER is housed in a 3.00 mm × 3.00 mm WQFN-16 package with exposed thermal pad connected to PCB ground for thermal management.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel simultaneous-sampling ADC applications.

Compared with ADS8355IRTER, ADS8354IRTER omits dual-channel hardware entirely, while AD7606C-16BSTZ trades pin compatibility and serial simplicity for higher channel count and parallel speed - making ADS8355IRTER optimal for compact, synchronized dual-signal systems.

Availability

ADS8355IRTER is available at Aetrix Electronics and suitable for servo drives, optical modules, multifunction relays, power quality analyzers, and three-phase UPS systems requiring stable component supply across extended temperature and long production lifecycles.

Supply support for ADS8355IRTER 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 decades of expertise in precision data converters and industrial-grade IC design.

The ADS8355IRTER belongs to TI's high-performance simultaneous-sampling ADC product line, engineered specifically for industrial motor control, energy metering, and automated test equipment demanding matched dual-channel acquisition and extended temperature resilience.

FAQ

What is the maximum sampling rate supported by the ADS8355IRTER?

The ADS8355IRTER supports a maximum throughput of 1 million samples per second (1 MSPS) per channel, with simultaneous sampling ensuring both ADC_A and ADC_B complete conversion within 650 ns. This rate is maintained across the full –40°C to +125°C operating range when AVDD = 5 V and DVDD ≥ 2.35 V, as specified in the timing requirements table of the SBAS761A datasheet.

Does the ADS8355IRTER require external reference components?

No - the ADS8355IRTER includes dual programmable 2.5-V internal references (REFDAC_A and REFDAC_B), eliminating the need for external reference ICs. When INT_EXT = 1, REFIO_A and REFIO_B source 2.5 V (at 0x1FF setting); external references are optional and supported when INT_EXT = 0. Each reference domain requires a 10-µF decoupling capacitor to REFGND_A or REFGND_B.

How is simultaneous sampling achieved between ADC_A and ADC_B in the ADS8355IRTER?

The ADS8355IRTER achieves true simultaneous sampling using two independent SAR ADC cores triggered by a common sample clock. Aperture delay matching is guaranteed at ≤40 ps between channels, and conversion completes in 650 ns with no pipeline latency. Both channels output data concurrently on dedicated SDO_A and SDO_B lines, avoiding multiplexing delays that would degrade phase coherence.

What input configurations does the ADS8355IRTER support, and how are they selected?

The ADS8355IRTER supports single-ended and pseudo-differential analog inputs via the INPUT_CONFIG register. AINM_SEL = 0 grounds AINM_A/AINM_B for single-ended use; AINM_SEL = 1 biases them at VREF_A/2 or VREF_B/2 for pseudo-differential mode. RANGE_SEL further selects 0–VREF or 0–2×VREF full-scale range - both bits apply identically to both ADCs.

Is the ADS8355IRTER compatible with 1.8-V digital interfaces?

Yes - the ADS8355IRTER supports DVDD from 1.65 V to 5.5 V, enabling direct interfacing with 1.8-V microcontrollers and FPGAs. At DVDD = 1.8 V, the serial interface operates at up to 24 MHz (per timing spec tCLK min = 42 ns), with VIH = 0.8 × DVDD and VOL = 0.2 × DVDD ensuring robust logic-level compatibility without level shifters.