Texas Instruments ADS8413IRGZRG4

Overview

ADS8413IRGZRG4 from Texas Instruments is a 16-bit, 2-MSPS SAR analog-to-digital converter with integrated 4-V internal reference, LVDS serial interface, and zero-latency operation. It delivers 92 dB SNR at 10 kHz input, ±2 LSB INL max, and operates in a 48-pin QFN package for high-speed data acquisition systems requiring precise unipolar differential sampling.

For engineers reviewing the ADS8413IRGZRG4 datasheet, ADS8413IRGZRG4 pinout, ADS8413IRGZRG4 application, or ADS8413IRGZRG4 equivalent, this page provides verified technical context, real-world timing behavior, validated LVDS interface configuration options, and confirmed alternative ADCs for medical instrumentation and closed-loop control designs.

Technical Context

The ADS8413IRGZRG4 implements a capacitor-based SAR architecture with inherent sample-and-hold, supporting unipolar differential input range of –4 V to +4 V referenced to internal 4.096-V reference. Its conversion time is fixed at 391 ns (at +VBD = 3.3 V) and acquisition time is 100 ns.

It features dual-mode LVDS serial interface: daisy-chain mode (MODE_C/D = 0) and cascade mode (MODE_C/D = 1), with configurable 16-/8-bit data frame via BYTE pin and selectable internal 200-MHz clock (CLK_I/E = 1) or external clock source. SYNC_O framing enables deterministic multi-device synchronization.

Key Specifications

Pinout & Package

ADS8413IRGZRG4 is housed in a 48-pin QFN package (RGZ) with exposed thermal pad, designed for low-inductance analog grounding and high-speed LVDS signal integrity. Pin layout supports separate analog/digital power domains (+VA/AGND and +VBD/BDGND) and dedicated reference ground (REFM).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed SAR ADC applications.

Compared with ADS8412IRGZT and ADS8402IPFBT, the ADS8413IRGZRG4 uniquely combines internal reference, LVDS serialization, zero-latency operation, and 48-pin QFN packaging-making it optimal for space-constrained, high-channel-count, real-time acquisition systems where reference integration and interface efficiency are critical.

Availability

ADS8413IRGZRG4 is available at Aetrix Electronics and suitable for medical instrumentation, industrial closed-loop control, and high-speed test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADS8413IRGZRG4 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 high-speed interface design.

The ADS8413IRGZRG4 belongs to TI's high-speed SAR ADC family targeting applications demanding both resolution and speed-designed specifically for systems where low latency, integrated reference, and robust LVDS interfacing eliminate external components and simplify FPGA integration.

FAQ

What is the absolute maximum input voltage range for ADS8413IRGZRG4?

The ADS8413IRGZRG4 supports an absolute analog input voltage range of –0.2 V to (Vref + 0.2 V) on both +IN and –IN pins, with Vref nominally 4.096 V. This yields a practical differential span of –4 V to +4 V when using the internal reference, and the input common-mode voltage must be maintained at Vref/2 ± 0.2 V. Exceeding these limits risks permanent damage per the absolute maximum ratings table.

Does ADS8413IRGZRG4 require an external reference, or can it operate with its internal reference?

The ADS8413IRGZRG4 can operate with its internal 4.096-V reference-no external reference is required. When using the internal reference, REFOUT must be shorted to REFIN, and a 1-µF storage capacitor must be placed between REFOUT and AGND. The internal reference exhibits 36 ppm/°C drift and achieves 4.080 V to 4.112 V accuracy at room temperature, making it suitable for many precision applications without calibration.

How does the Nap mode function in ADS8413IRGZRG4, and what power savings does it provide?

The Nap mode in ADS8413IRGZRG4 reduces supply current from 64 mA (2 MSPS active) to 25 mA during idle intervals between conversions, cutting power dissipation from 290 mW to ~125 mW. It is enabled by asserting the NAP pin high at conversion end and remains active until the next acquisition phase begins-ideal for burst-mode acquisition or thermally constrained systems where average power matters more than peak performance.

Can ADS8413IRGZRG4 support multiple devices in a daisy-chain configuration, and what is the maximum count?

Yes, ADS8413IRGZRG4 supports daisy-chain configurations with up to four devices operating simultaneously at full 2-MSPS throughput and 200-MHz LVDS clock rate. Each device forwards SDO, CLK_O, and SYNC_O to the next via SDI, CLK_I, and SYNC_I, while BUS_BUSY of one device drives RD of the next. The first device must have LAT_Y/N = 0; subsequent devices require LAT_Y/N = 1 to ensure proper frame alignment and timing propagation.

What is the significance of the BYTE pin on ADS8413IRGZRG4, and how does it affect data framing?

The BYTE pin on ADS8413IRGZRG4 selects between 16-bit and 8-bit LVDS data framing: when BYTE = 0, SYNC_O defines a 16-clock frame for full-word transfer; when BYTE = 1, SYNC_O defines an 8-clock frame for byte-wise transfer. This allows flexible FPGA resource allocation-byte mode halves clock cycles per word and simplifies deserialization logic, while 16-bit mode maximizes throughput efficiency for wide-data-path processors.