Texas Instruments ADS8344EBG4

Overview

ADS8344EBG4 from Texas Instruments is a 16-bit, 8-channel SAR analog-to-digital converter with synchronous serial interface, ±0.024% gain error, 100kHz throughput rate, and QSOP-20 package. It supports single-ended or differential input configurations and operates from 2.7V to 5V supply, enabling high-precision data acquisition in battery-powered test equipment.

For engineers reviewing the ADS8344EBG4 datasheet, ADS8344EBG4 pinout, ADS8344EBG4 application, or ADS8344EBG4 equivalent, key selection criteria include guaranteed 16-bit no-missing-codes performance over –40°C to +85°C, 84dB SINAD at 10kHz, and low-power shutdown mode consuming <15µW - critical for portable instrumentation and industrial sensor interfaces.

Technical Context

The ADS8344EBG4 implements a capacitive redistribution SAR architecture with integrated sample-and-hold, eliminating external hold circuitry. Its 8-channel analog multiplexer supports configurable single-ended (8 channels) or differential (4 channels) input modes via SGL/DIF and A2–A0 control bits transmitted serially.

Digital interface uses a 4-wire CMOS-compatible serial protocol (CS, DCLK, DIN, DOUT) with BUSY signaling. Conversion timing is determined by external clock (f_DCLK = 24 × f_SAMPLE) or internal clock mode, supporting flexible microprocessor integration without strict timing constraints on host controller.

Key Specifications

Pinout & Package

ADS8344EBG4 is housed in a QSOP-20 (DBQ) package, 7.2mm × 4.4mm × 1.75mm body, 0.65mm lead pitch, RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8344N and ADS8345IPW, the ADS8344EBG4 uniquely balances ultra-low gain error (±0.024%), wide supply range (2.7–5V), and QSOP-20 compactness - making it optimal for portable, battery-voltage-scalable instrumentation where calibration stability and PCB area are both constrained.

Availability

ADS8344EBG4 is available at Aetrix Electronics and suitable for portable data loggers, industrial sensor interfaces, and handheld test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADS8344EBG4 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 signal chain solutions.

The ADS8344EBG4 belongs to TI's precision SAR ADC product line, engineered specifically for high-resolution, low-power, multi-channel data acquisition in portable and harsh-environment applications - emphasizing accuracy retention across voltage and temperature extremes.

FAQ

What is the guaranteed operating temperature range for ADS8344EBG4?

The ADS8344EBG4 is fully specified and tested over –40°C to +85°C ambient temperature. All key parameters-including gain error (±0.024%), integral linearity (6 LSB), and throughput rate (100kHz)-are ensured across this range per SBAS139E datasheet revision September 2006. This makes ADS8344EBG4 suitable for deployment in uncontrolled industrial enclosures and outdoor environmental monitoring hardware.

Does ADS8344EBG4 support true differential input mode?

Yes, ADS8344EBG4 supports true differential input using any of four complementary channel pairs (e.g., CH0/CH4, CH1/CH5) selected via the SGL/DIF control bit and A2–A0 address bits. In differential mode, the device measures the voltage difference between two inputs while rejecting common-mode noise up to 100dB - confirmed by channel-to-channel isolation specifications in the datasheet.

How does the reference voltage affect LSB size and noise performance in ADS8344EBG4?

In ADS8344EBG4, LSB size equals V_REF/65536 (e.g., 76µV at 5V, 38µV at 2.5V). Lower V_REF reduces absolute LSB weight but increases quantization noise relative to signal - requiring averaging or digital filtering for stable codes below ~1mV. The datasheet cautions that sub-500mV references may yield unstable output due to internal noise dominance.

Can ADS8344EBG4 operate with an external clock slower than 2.4MHz?

Yes - ADS8344EBG4 accepts external clock frequencies from 24kHz to 2.4MHz (f_DCLK = 24 × f_SAMPLE). At 24kHz, maximum throughput is 1kHz; at 2.4MHz, it reaches 100kHz. Timing tables confirm valid operation down to 2.7V supply with t_CL/t_CH ≥200ns, enabling compatibility with low-speed microcontrollers lacking high-frequency peripherals.

What is the function of the BUSY pin on ADS8344EBG4, and how does it behave in internal vs external clock modes?

The BUSY pin on ADS8344EBG4 is an active-low indicator of conversion activity. In external clock mode, BUSY goes LOW during control byte latching and remains LOW for 16 DCLK cycles during conversion. In internal clock mode, BUSY goes LOW at conversion start and returns HIGH after ≤8µs - providing deterministic, clock-independent timing for interrupt-driven firmware without polling.