Texas Instruments ADS850-EVM

Overview

ADS850-EVM from Texas Instruments is an evaluation module designed specifically for the ADS850Y 14-bit, 10-MSPS analog-to-digital converter. It supports single-ended DC-coupled input, selectable internal/external reference operation, and optional active input filtering via user-populated components. The board enables fast performance validation in high-speed data acquisition systems requiring precise timing and low-jitter clocking.

For engineers reviewing the ADS850-EVM datasheet, ADS850-EVM pinout, ADS850-EVM application, or ADS850-EVM equivalent, this page delivers verified technical context, power supply requirements (+5V/–5V), clock interface specifications (50Ω SMA input, ≤2 ns edge rates), calibration/reset controls, and OVR indicator behavior - all critical for lab setup and signal integrity validation.

Technical Context

The ADS850-EVM implements a transformer-coupled differential front-end for the ADS850Y ADC, with jumper-selectable input ranges (2V or 4V) controlled by SEL and VREF configuration at JP5–JP7. It integrates CMOS octal buffers (IDT74FCT541ATSO) to isolate digital outputs and reduce bus loading.

Power is split across two dedicated connectors: P2 supplies analog front-end rails (±5V), while P1 supplies the converter core and VDRV pin (adjustable 3V–5V). The board includes on-board over-range detection (LED1) and calibration mode indication (LED2), both directly tied to ADS850Y status signals per SBAS154.

Key Specifications

Availability

ADS850-EVM is available at Aetrix Electronics and suitable for high-speed data acquisition, precision test instrumentation, and communications receiver development requiring stable component supply and validated reference design support.

Supply support for ADS850-EVM 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 delivering analog, embedded processing, and high-performance silicon solutions for industrial, automotive, and communications applications.

The ADS850-EVM belongs to TI's precision data converter evaluation platform family, engineered to accelerate characterization and system integration of high-speed ADCs like the ADS850Y in real-world signal chain designs.

FAQ

What is the primary function of the ADS850-EVM?

The ADS850-EVM is a dedicated evaluation module for the ADS850Y 14-bit, 10-MSPS ADC. It provides a complete, tested hardware environment-including signal conditioning, clock interface, power distribution, and buffered digital output-to enable rapid functional verification and performance benchmarking of the ADS850Y in lab and development settings.

Does the ADS850-EVM support both internal and external voltage references?

Yes, the ADS850-EVM supports both internal and external reference modes for the ADS850Y. Selection is made via solder jumpers JP5–JP7, allowing users to configure the input range (2V or 4V) and tie the VREF pin accordingly. This flexibility enables accurate testing under different system-level reference architectures without board modification.

How is the analog input configured on the ADS850-EVM?

The ADS850-EVM uses a Mini-Circuits ADT2-1T transformer to convert single-ended input signals applied at J2 into differential inputs for the ADS850Y. Only R39, R47, and T2 are pre-populated; additional components for alternative front-end circuits (e.g., active filter using OPA687) must be added by the user per the schematic and SBOS065 datasheet.

What power supplies does the ADS850-EVM require?

The ADS850-EVM requires two independent power sources: ±5V analog supply delivered via connector P2 (labeled –5V/GND/+5V), and a +5V core supply plus adjustable VDRV (3V–5V) delivered via connector P1 (labeled VDRV/GND/+5V). VDRV directly connects to pin 26 of the ADS850Y to control output logic levels.

How do the RESET and CALIBRATION buttons operate on the ADS850-EVM?

The RESET button clears the ADS850Y's internal memory and initiates a new acquisition cycle; users must allow for inherent data latency before capturing valid samples. The CALIBRATION button places the ADS850Y into self-calibration mode, indicated by LED2 activation. Both functions follow the exact timing and state sequences defined in the ADS850 datasheet (SBAS154).