Texas Instruments ADS8343EBG4

Overview

ADS8343EBG4 from Texas Instruments is a 16-bit, 4-channel SAR analog-to-digital converter with synchronous serial interface, ±VREF bipolar input range, 100kHz throughput, and SSOP-16 package. It supports single-ended or differential analog inputs, operates from 2.7V to 5V, and includes shutdown mode reducing power to <15µW - ideal for portable data loggers and battery-powered test equipment.

For engineers reviewing the ADS8343EBG4 datasheet, ADS8343EBG4 pinout, ADS8343EBG4 application, or ADS8343EBG4 equivalent, key selection criteria include its 16-bit resolution with 86dB SINAD at 10kHz, channel-to-channel isolation of 100dB, integral linearity error of ±6 LSB (typ), and compatibility with ADS7841/ADS8341 in same SSOP-16 footprint.

Technical Context

The ADS8343EBG4 implements a capacitive redistribution SAR architecture with integrated sample-and-hold, enabling true 16-bit accuracy without external hold circuitry. Its 4-channel multiplexer supports configurable single-ended or differential input modes via SGL/DIF control bit, with COM pin referenced to VREF for common-mode biasing.

Digital interface uses an 8-bit control byte (S-A2-A1-A0-SGL/DIF-PD1-PD0) followed by 16-bit two's complement output, synchronized to DCLK. Power-down modes are selectable via PD bits: auto power-down between conversions (PD1=PD0=0) or internal clock mode (PD1=1, PD0=0), with BUSY signal indicating conversion status.

Key Specifications

Pinout & Package

ADS8343EBG4 is housed in a 16-pin SSOP (DBQ) package with 0.65 mm pitch, optimized for compact PCB layouts and thermal performance in industrial temperature range (–40°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8341IPW and ADS7841IPW, the ADS8343EBG4 uniquely delivers 16-bit precision across four channels in the same SSOP-16 package - making it the only option among the three that satisfies high-resolution, multi-channel, space-constrained requirements without external components.

Availability

ADS8343EBG4 is available at Aetrix Electronics and suitable for portable instrumentation, industrial process control, and medical sensor interfaces requiring stable component supply and long-term manufacturability.

Supply support for ADS8343EBG4 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 ICs.

The ADS8343EBG4 belongs to TI's precision SAR ADC product line, designed specifically for battery-operated and space-constrained measurement systems demanding 16-bit accuracy, low power, and integrated multiplexing.

FAQ

What is the maximum sampling rate supported by the ADS8343EBG4?

The ADS8343EBG4 supports a maximum throughput rate of 100 kHz, achieved with a 2.4 MHz external DCLK and 24-clock-cycle conversion sequence. This rate is guaranteed across the full operating temperature range (–40°C to +85°C) and supply voltage (2.7 V to 5 V). At lower clock frequencies, sampling rate scales linearly - e.g., 1.2 MHz DCLK yields 50 kHz throughput. The ADS8343EBG4 maintains 86 dB SINAD and ±6 LSB INL at full speed.

Does the ADS8343EBG4 require an external reference voltage?

Yes, the ADS8343EBG4 requires an external reference voltage applied to the VREF pin. It accepts 0.5 V to VCC/2 (e.g., up to 2.5 V at +5 V supply), directly setting the ±VREF input range. With VREF = 1.25 V, LSB size is 38 µV; with VREF = 2.5 V, LSB size is 76 µV. The reference input is unbuffered and draws up to 40 µA (typ), so a low-noise, low-impedance source - such as a precision voltage reference IC - is recommended for optimal performance.

How does the ADS8343EBG4 handle differential versus single-ended inputs?

The ADS8343EBG4 supports both configurations via the SGL/DIF bit in its 8-bit control byte. In single-ended mode (SGL/DIF = HIGH), each channel (CH0–CH3) is measured relative to the COM pin, yielding a 0 V to 2×VREF unipolar range. In differential mode (SGL/DIF = LOW), pairs like CH0/COM or CH1/CH2 are used to deliver true bipolar ±VREF input. Input impedance matching between CHX and COM is critical in both modes to avoid gain/linearity errors - mismatched sources may require extended acquisition time.

What power-saving features does the ADS8343EBG4 offer?

The ADS8343EBG4 provides two hardware-controlled power-saving mechanisms: SHDN pin (active-low shutdown, <15 µW) and PD bits in the control byte. Setting PD1=PD0=0 enables auto power-down between conversions, reducing average current to 3 µA at low sampling rates. Setting PD1=1, PD0=0 activates internal clock mode, offloading timing generation from the host MCU. Quiescent current is 1.2 mA (typ) at 2.7 V and drops to 105 µA at 10 kHz sampling - all without sacrificing 16-bit accuracy or timing integrity.

Is the ADS8343EBG4 pin-compatible with other Texas Instruments ADCs?

Yes, the ADS8343EBG4 is explicitly specified as pin-for-pin compatible with the ADS7841 (12-bit, 4-channel) and ADS8341 (16-bit, 2-channel), all in SSOP-16 (DBQ) package. Pin mapping, power sequencing, timing behavior, and serial interface protocol are identical - allowing direct substitution in existing designs. However, resolution and channel count differ: ADS7841 offers lower accuracy, while ADS8341 lacks two input channels. Full functional equivalence requires verifying software control byte configuration and post-ADC signal processing.