Texas Instruments ADS8341EB

Overview

ADS8341EB from Texas Instruments is a 16-bit, 4-channel SAR analog-to-digital converter with synchronous serial interface, single-supply operation (2.7V–5V), up to 100kHz throughput, and SSOP-16 package. It features 86dB SINAD, 4-channel single-ended or 2-channel differential input, and shutdown mode drawing <15µW - ideal for portable data loggers and battery-powered test equipment.

For engineers reviewing the ADS8341EB datasheet, ADS8341EB pinout, ADS8341EB application, or ADS8341EB equivalent, key selection criteria include its 16-bit resolution with guaranteed no-missing-codes performance (15 LSB INL max), 100kHz sampling rate at 2.4MHz DCLK, and flexible reference range (0.5V to VCC) enabling precise input scaling in low-power embedded measurement systems.

Technical Context

The ADS8341EB implements a capacitive redistribution successive approximation register (SAR) architecture with integrated sample-and-hold, supporting both external and internal clock modes. Its four-channel analog multiplexer allows configurable single-ended (CHx-to-COM) or differential (CHx-to-CHy) input routing via serial control bits A2–A0 and SGL/DIF.

Digital interface timing is tightly coupled to conversion control: in external clock mode, 24 DCLK cycles complete one conversion (including 8-bit control byte + 16-bit result), while internal clock mode decouples conversion timing from serial I/O, allowing DCLK rates from 0 to 2.0MHz after BUSY asserts high.

Key Specifications

Pinout & Package

ADS8341EB is housed in a 16-pin SSOP (DBQ) package with 0.65mm pitch, optimized for compact PCB layouts in portable instrumentation. Pin functions are electrically isolated between analog and digital domains, with dual GND pins (pins 10 and 11) and dual +VCC pins (pins 1 and 9) to minimize supply noise coupling into the SAR core.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit SAR ADC applications.

Compared with ADS8342EB, the ADS8341EB provides greater design flexibility via external reference scaling and identical pinout to ADS7841, while ADS8325IPW sacrifices channel count and differential capability to reduce unit cost - making ADS8341EB optimal for upgradeable, multi-sensor, low-power portable systems.

Availability

ADS8341EB is available at Aetrix Electronics and suitable for portable data acquisition, battery-powered test equipment, and industrial process control requiring stable component supply with guaranteed long-term availability and consistent parametric performance.

Supply support for ADS8341EB 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 low-power signal chain solutions.

The ADS8341EB belongs to TI's precision SAR ADC product line, designed specifically for portable and battery-operated measurement systems requiring high resolution, low power, and flexible input configuration without sacrificing industrial-grade temperature performance.

FAQ

What is the maximum sampling rate supported by the ADS8341EB?

The ADS8341EB supports a maximum sampling rate of 100kHz when operated with a 2.4MHz external DCLK in external clock mode. This rate is achieved using 24 clock cycles per conversion (8-bit control byte + 16-bit result). At lower DCLK frequencies or in internal clock mode, the effective throughput scales accordingly - for example, 12.5kHz sampling draws only 220µA at +2.7V, optimizing battery life in intermittent acquisition systems.

Does the ADS8341EB require an external reference voltage?

Yes, the ADS8341EB requires an external reference voltage applied to the VREF pin. It accepts any stable voltage from 0.5V to +VCC, which directly defines the full-scale input range (e.g., 0–2.5V with 2.5V reference). The reference is unbuffered and draws 13–40µA depending on VREF level and sampling rate, so a low-noise, well-bypassed source is essential to maintain 16-bit accuracy and 86dB SINAD performance.

How does the ADS8341EB handle differential versus single-ended inputs?

The ADS8341EB configures its analog input via serial control bits: when SGL/DIF = HIGH, it operates in 4-channel single-ended mode (each CHx measured vs COM); when SGL/DIF = LOW, it supports 2-channel differential mode (e.g., CH0–CH1 or CH2–CH3). The A2–A0 bits select the active channel pair. This is implemented in hardware using the internal multiplexer shown in Figure 2 of the SBAS136D datasheet - no external components are needed to switch modes.

Can the ADS8341EB be used with a microcontroller that lacks a dedicated SPI peripheral?

Yes, the ADS8341EB can be interfaced with GPIO-based bit-banged serial communication because its digital interface uses standard CMOS-level signals and well-defined timing (e.g., tDS = 50ns min setup before DCLK rising edge). The control byte format (S-A2-A1-A0-xx-SGL/DIF-PD1-PD0) and 24-cycle conversion protocol are fully documented, enabling reliable software-driven operation even on resource-constrained MCUs without hardware SPI.

What is the significance of the 'B' suffix in ADS8341EB?

The 'B' suffix in ADS8341EB denotes the enhanced performance grade: it guarantees tighter integral nonlinearity (±6 LSB max vs ±8 LSB for ADS8341E) and improved offset error match (1.2 LSB vs 4.0 LSB), as verified in the Electrical Characteristics tables of the SBAS136D datasheet. This makes ADS8341EB preferred for high-accuracy applications like calibrated test equipment and precision sensor interfaces where code-edge consistency is critical.