Texas Instruments ADS8344N/1KG4

Overview

ADS8344N/1KG4 from Texas Instruments is a 16-bit, 8-channel SAR analog-to-digital converter with synchronous serial interface, ±0.05% gain error, 100 kHz throughput rate, and 84 dB SINAD. It operates from a single 2.7 V to 5 V supply and supports both single-ended (8-channel) and differential (4-channel) input configurations for precision data acquisition in battery-powered systems.

For engineers reviewing the ADS8344N/1KG4 datasheet, ADS8344N/1KG4 pinout, ADS8344N/1KG4 application, or ADS8344N/1KG4 equivalent, key selection criteria include its SSOP-20 package, 2.7–5 V supply flexibility, on-chip multiplexer, shutdown mode (<15 µW), and compatibility with microprocessor serial interfaces requiring precise timing control and low-noise sampling.

Technical Context

The ADS8344N/1KG4 implements a capacitive redistribution SAR architecture with integrated sample-and-hold, enabling true 16-bit resolution without external hold circuitry. Its analog front-end includes an 8-channel multiplexer configurable via serial control bits (A2–A0, SGL/DIF) for either single-ended or differential input modes, with COM pin referenced zero-code alignment.

Digital operation relies on a 4-wire CMOS-compatible serial interface (CS, DCLK, DIN, DOUT) supporting both external clock mode (f_DCLK = 24 × f_SAMPLE) and internal clock mode (2.4 MHz max), with BUSY signaling conversion status and automatic power-down control via PD1/PD0 bits.

Key Specifications

Pinout & Package

ADS8344N/1KG4 is housed in a 20-pin SSOP (Shrink Small Outline Package) with 0.65 mm lead pitch, optimized for compact PCB layouts and industrial temperature operation (–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 ADS8344EB/2K5, ADS8344N/1KG4 trades minor accuracy for broader supply tolerance and lower unit cost; versus ADS7844E/1K, it delivers 4 extra bits and differential capability at modest power penalty-making it optimal for mid-tier industrial and portable measurement designs.

Availability

ADS8344N/1KG4 is available at Aetrix Electronics and suitable for data acquisition systems, portable test equipment, and industrial process controllers requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for ADS8344N/1KG4 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 ADS8344N/1KG4 belongs to TI's precision SAR ADC product line, designed specifically for high-resolution, low-power, multi-channel sampling in portable and harsh-environment applications where accuracy, reliability, and serial interface simplicity are essential.

FAQ

What is the maximum sampling rate supported by the ADS8344N/1KG4?

The ADS8344N/1KG4 supports a maximum throughput rate of 100 kHz, corresponding to a minimum conversion time of 10 µs. This is achieved with an external clock frequency of 2.4 MHz (f_DCLK = 24 × f_SAMPLE). At lower rates, the device maintains full 16-bit performance and can operate down to single-shot or burst modes using its internal clock or power-down features.

Does the ADS8344N/1KG4 support differential input mode?

Yes, the ADS8344N/1KG4 supports true 4-channel differential input mode via the SGL/DIF control bit. When SGL/DIF = LOW, pairs CH0/CH4, CH1/CH5, CH2/CH6, and CH3/CH7 become differential input channels. The COM pin serves as the common-mode reference, and the device guarantees >100 dB channel-to-channel isolation at 10 kHz in this configuration.

What package type is used for the ADS8344N/1KG4?

The ADS8344N/1KG4 uses the SSOP-20 (Shrink Small Outline Package) with 20 leads and 0.65 mm pitch, designated by TI package code DB. This surface-mount package measures 7.2 mm × 5.3 mm and is rated for operation from –40°C to +85°C, making it suitable for industrial and portable applications with space and thermal constraints.

How does the reference voltage affect the LSB size in the ADS8344N/1KG4?

In the ADS8344N/1KG4, LSB size equals V_REF / 65536. For example, with V_REF = 2.5 V, one LSB = 38.1 µV; with V_REF = 5.0 V, one LSB = 76.3 µV. Lower V_REF reduces absolute resolution and amplifies the impact of offset/gain errors in LSB units-so a fixed 2 mV offset becomes ~53 LSBs at 2.5 V versus ~26 LSBs at 5.0 V.

Can the ADS8344N/1KG4 operate from a 3.3 V supply?

Yes, the ADS8344N/1KG4 is fully specified for operation from 2.7 V to 5 V, including standard 3.3 V logic supplies. At +3.3 V, it delivers 100 kHz throughput, 84 dB SINAD, and typical power dissipation of ~4.1 mW. Digital I/O levels remain CMOS-compatible, with VIH ≥ 2.31 V and VOL ≤ 0.4 V under load, ensuring robust interfacing with 3.3 V microcontrollers.