Texas Instruments ADS8342EVM

Overview

ADS8342EVM from Texas Instruments is an evaluation module designed to characterize the ADS8342 16-bit, 100-kSPS successive-approximation analog-to-digital converter (ADC) in all operating modes. It features a buffered parallel data interface, four true bipolar analog inputs, on-board analog front-end (AFE) with OPA726 op amp, and jumper-configurable clock division (÷1 to ÷8) and byte/word output mode. The EVM supports direct interfacing with TI DSK platforms, TMS320 DSPs, and third-party development boards including the HPA449 MSP430 board.

For engineers reviewing the ADS8342EVM datasheet, ADS8342EVM pinout, ADS8342EVM application, or ADS8342EVM equivalent, this module enables rapid validation of ADC performance-including SNR, THD, and INL-under real-world analog signal conditioning, parallel host interface timing, and power supply noise sensitivity conditions typical in precision data acquisition systems.

Technical Context

The ADS8342EVM implements a modular architecture centered on the ADS8342IBPFBT ADC in a 48-pin TQFP package, with dedicated analog input routing via J1 header and SMA INPUT connector, and configurable AFE gain/filtering using user-placed R9–R12 and C21/C27 components. Power delivery includes separate ±5 VDC for analog circuitry and +3.3 VDC for digital logic, with filtering provided for all rails.

Digital control is implemented through J4 (10-pin header), supporting /CONVST initiation via /WR strobe, interrupt-driven readback via BUSY→INT, and address decoding (A0–A4) for channel selection (AIN0–AIN3). Parallel data access occurs over J3 (16-pin header), with D0–D15 routed to odd pins and even pins grounded-enabling both 16-bit word and 8-bit byte read modes controlled by W5 jumper.

Key Specifications

Availability

ADS8342EVM is available at Aetrix Electronics and suitable for precision data acquisition, industrial sensor interface, and embedded test equipment applications requiring stable component supply, traceable evaluation hardware, and documented reference design integration.

Supply support for ADS8342EVM 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 company specializing in analog, embedded processing, and high-performance data conversion technologies, with decades of leadership in precision ADC design and evaluation platform development.

The ADS8342EVM belongs to TI's modular evaluation module product line, engineered specifically to accelerate characterization and system integration of high-resolution SAR ADCs in laboratory and prototype environments-prioritizing signal integrity, configurability, and interoperability with TI's DSP and microcontroller ecosystems.

FAQ

What is the primary function of the ADS8342EVM?

The ADS8342EVM is an evaluation module built around the ADS8342IBPFBT 16-bit, 100-kSPS SAR ADC. Its purpose is to enable engineers to validate the ADC's dynamic performance (e.g., SNR, THD, INL), verify analog front-end signal conditioning, and test parallel interface timing with host processors such as TI DSPs or FPGAs-without requiring custom PCB design. The ADS8342EVM provides jumpers, headers, and socketed components to flexibly configure clocking, data format, input routing, and filtering.

Does the ADS8342EVM include the ADS8342 ADC device itself?

Yes, the ADS8342EVM includes the ADS8342IBPFBT device mounted on-board in a 48-pin TQFP package. This is the exact production-grade ADC intended for end-system use-not a sample or placeholder. The EVM's schematic (Section 6.2 of SLAU120) confirms U1 as REF1004C-2.5, U2 as OPA726AID, and DUT as ADS8342IBPFBT, with full bill-of-materials listing TI part numbers and placement designators.

Can the ADS8342EVM operate without an external host processor?

No-the ADS8342EVM requires an external host (e.g., TI DSK, TMS320-based board, or FPGA development system) to drive control signals (/CONVST, /RD, /CS, address lines) and read parallel data. It lacks onboard microcontroller, memory, or autonomous conversion logic. The ADS8342EVM is strictly an interface and signal-conditioning platform: conversions are initiated by the host's /WR strobe, and data is retrieved via /RD reads from J3, with BUSY→INT signaling completion.

What are the supported power supply requirements for the ADS8342EVM?

The ADS8342EVM requires three isolated DC supplies: +5 VDC and –5 VDC for analog circuitry (including the ADS8342 and OPA726), and +3.3 VDC for digital logic (buffers, level shifters, decode logic). These are applied via J2 (10-pin header), with pin assignments explicitly defined in Section 4 of SLAU120. While onboard filters exist, TI specifies that "optimal performance requires a clean, well-regulated power source" - underscoring sensitivity to ripple and noise on all rails.

How is analog input selection configured on the ADS8342EVM?

Analog input selection is controlled by jumpers W1–W4: shunts at pins 1–2 route signals directly from J1 (10-pin header) to AIN0–AIN3; shunts at pins 2–3 route signals from the SMA INPUT connector through the OPA726-based AFE. Each channel operates independently, allowing mixed-mode operation-for example, AIN0 and AIN1 from J1, AIN2 and AIN3 from the AFE. The AFE's gain and bandwidth are user-adjustable via resistor and capacitor sockets (R9–R12, C21, C27).