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Texas Instruments ADS9817RSHT
- Part No.:
- ADS9817RSHT
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 56-VFQFN Exposed Pad
- Datasheet:
-
ADS9817RSHT.pdf
- Description:
- EIGHT-CHANNEL 18-BIT 2-MSPS/CH
- Quantity:
- Payment:
- Shipping:
Inventory:151
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Product details
Overview
ADS9817RSHT from Texas Instruments is an 8-channel, 18-bit dual simultaneous-sampling SAR ADC with integrated analog front-end, 2-MSPS per channel throughput, ±12V common-mode input range, and 4.096V internal reference. It delivers DNL ±0.5LSB, SNR 92dB, and THD –113dB for high-precision parametric test and battery formation systems.
For engineers reviewing the ADS9817RSHT datasheet, ADS9817RSHT pinout, ADS9817RSHT application, or ADS9817RSHT equivalent, this page provides verified specifications, package mapping to RSH (56-pin VQFN), functional pin definitions, real-world use cases in PMU and DAQ systems, and two validated alternative parts with documented technical differences.
Technical Context
The ADS9817RSHT implements a dual ADC architecture enabling true simultaneous sampling across two independent 4-channel banks, each with programmable gain amplifiers and user-selectable low-pass filters (21kHz or up to 400kHz). Its constant 1MΩ input impedance eliminates external driver requirements for direct sensor interfacing.
It integrates a precision 4.096V ADC reference and a buffered 2.5V reference output, supports ±12V overvoltage protection on all analog inputs, and operates across –40°C to +125°C using separate 5V analog, 1.8V core, and 1.2–1.8V I/O supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 18-bit SAR with no missing codes - ensures full dynamic range utilization in high-fidelity measurement systems. |
| Sampling Rate | 2 MSPS per channel - enables real-time capture of fast transients in battery cell voltage monitoring. |
| Input Impedance | 1 MΩ (±15%) - allows direct connection to shunt resistors, current sensors, and transformer outputs without buffer stages. |
| DC Accuracy | DNL ±0.5 LSB, INL ±0.8 LSB - guarantees monotonicity and linearity critical for calibration-grade instrumentation. |
| AC Performance | SNR 92 dB, THD –113 dB at 2 kHz - supports high-resolution spectral analysis in power electronics validation. |
| Reference | Integrated 4.096 V ADC reference with 10–25 ppm/°C drift - eliminates external reference component count and thermal drift uncertainty. |
| Supply Voltages | AVDD_5V (4.75–5.25 V), VDD_1V8 (1.75–1.85 V), IOVDD (1.15–1.85 V) - enables clean separation of analog, core digital, and interface power domains. |
Pinout & Package
RSH package: 56-pin VQFN, 7 mm × 7 mm, exposed thermal pad connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN1P–AIN8P / AIN1M–AIN8M | Analog input differential pairs (8 channels) | Supports bipolar/unipolar operation with ±12V common-mode range and ±18V overvoltage tolerance - simplifies front-end protection design. |
| REFIO / REFM / REFOUT_2V5 | Reference I/O and ground | REFIO serves as internal reference output or external reference input; REFOUT_2V5 provides stable 2.5V for external circuitry - enables flexible reference architecture. |
| SMPL_CLKP / SMPL_CLKM | Differential sampling clock input | Accepts single-ended (via SMPL_CLKP only) or differential clock - improves jitter immunity in noisy industrial environments. |
| D0–D3 / DCLKOUT / FCLKOUT | CMOS data interface outputs | 4-lane DDR/SDR parallel output with frame clock - reduces interface timing margin pressure versus serial protocols. |
| CS / SCLK / SDI / SDO / SPI_EN | SPI configuration interface | Configurable via standard SPI (up to 20 MHz); SPI_EN selects between internal/external reference - enables runtime reconfiguration without hardware change. |
Key Features
| Feature | Design Value |
|---|---|
| Dual simultaneous-sampling banks | Enables time-aligned acquisition across 8 channels - essential for phase-sensitive measurements in motor drive current/voltage analysis. |
| User-selectable LPF bandwidth (21kHz / 400kHz) | Allows trade-off between noise rejection and signal fidelity per channel - supports both low-noise battery voltage logging and higher-bandwidth fault detection. |
| ±12V common-mode input range | Permits direct connection to isolated amplifier outputs or transformer secondaries without level-shifting - reduces BOM and layout complexity. |
| Integrated 2.5V reference output | Provides precision bias for external comparators, op-amps, or auxiliary ADCs - eliminates need for discrete reference ICs in multi-rail DAQ systems. |
| 1 MΩ input impedance with <25 ppm/°C drift | Ensures consistent gain accuracy across temperature - critical for uncalibrated long-term deployment in environmental test chambers. |
Applications
| Parametric Measurement Unit (PMU) | Battery Cell Formation System |
|---|---|
Use Scenario: High-accuracy DC parametric testing of semiconductor devices under varying bias conditions. IC Role / Device Role / Timing Role: Primary 8-channel digitizer capturing voltage/current waveforms with synchronized sampling and sub-LSB linearity. Use Value: Simultaneous dual-bank sampling eliminates inter-channel skew, enabling precise IV curve tracing without software interpolation. |
Use Scenario: Real-time monitoring and control of individual lithium-ion cell voltages during charge/discharge cycling. IC Role / Device Role / Timing Role: Front-end ADC for multi-cell stack monitoring with ±12V common-mode support for floating cell measurements. Use Value: 1 MΩ input impedance allows direct connection to cell taps without loading effects, preserving formation accuracy over thousands of cycles. |
| Data Acquisition (DAQ) System | Power Electronics Validation |
Use Scenario: Modular industrial DAQ system acquiring sensor data from strain gauges, thermocouples, and RTDs. IC Role / Device Role / Timing Role: Channel-dense, high-linearity ADC with integrated PGA and programmable input ranges (±2.5V to ±12V). Use Value: Single-device support for multiple sensor types eliminates need for external range-switching circuitry or gain-setting resistors. |
Use Scenario: Capturing gate drive waveforms, bus voltage ripple, and current sense signals in inverter validation benches. IC Role / Device Role / Timing Role: Simultaneous sampling ADC capturing correlated voltage/current pairs for switching loss analysis. Use Value: Dual-bank architecture captures voltage and current on same sample edge - removes timing uncertainty in Eon/Eoff calculations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision, multi-channel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS9815RSHT | 1-MSPS/channel sampling rate, 165 mW typical power vs. 232 mW for ADS9817RSHT | Lower throughput suitable for slower battery monitoring or static DAQ; identical pinout and register map | Select when full 2-MSPS/channel is unnecessary and thermal/power budget is constrained. |
| AD7606C-18BSTZ | 8-channel, 18-bit, 1-MSPS, ±10V max input range, no integrated 2.5V reference output, uses external reference | Lacks wide common-mode support (±12V) and integrated auxiliary reference; requires external 4.096V reference and decoupling | Choose when existing designs already use AD7606-family layout and external reference infrastructure is in place. |
Compared with ADS9815RSHT, the ADS9817RSHT delivers 2× sampling throughput and higher SNR at full speed; compared with AD7606C-18BSTZ, it adds ±12V common-mode capability and an on-chip 2.5V reference, reducing external component count and improving system-level accuracy.
Availability
ADS9817RSHT is available at Aetrix Electronics and suitable for parametric measurement units, battery cell formation equipment, and industrial data acquisition systems requiring stable component supply, extended temperature operation (–40°C to +125°C), and long-term production continuity.
Supply support for ADS9817RSHT 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 conversion and industrial-grade signal chain solutions.
The ADS981x product line was designed specifically for high-channel-count, high-accuracy parametric test and battery manufacturing applications - integrating analog front-end functionality, simultaneous sampling, and robust industrial operating conditions into a single IC.
FAQ
What is the maximum analog input voltage range supported by the ADS9817RSHT?
The ADS9817RSHT supports programmable analog input ranges of ±2.5V, ±3.5V, ±5V, ±7V, ±10V, and ±12V. Its analog inputs tolerate up to ±18V absolute maximum voltage, providing robust overvoltage protection during transient events. The ±12V common-mode range allows direct interfacing with isolated amplifiers and transformer-coupled signals without level-shifting circuitry.
Does the ADS9817RSHT require external reference components?
No - the ADS9817RSHT integrates a precision 4.096V internal reference for the ADC core and provides a buffered 2.5V reference output (REFOUT_2V5) for external circuits. External references can be used via the REFIO pin if higher accuracy or custom voltage is required, but they are not mandatory for standard operation.
How many analog input channels does the ADS9817RSHT have, and how are they sampled?
The ADS9817RSHT features eight analog input channels organized into two independent 4-channel banks (channels 1–4 and 5–8). It performs true dual simultaneous sampling - both banks acquire data at the exact same instant - enabling time-aligned measurements critical for phase-sensitive applications like motor current/voltage analysis.
What package type and pin count does the ADS9817RSHT use?
The ADS9817RSHT is housed in a RSH package: a 56-pin VQFN measuring 7 mm × 7 mm with an exposed thermal pad. This package is optimized for thermal performance in high-density industrial PCB layouts and is pin-compatible with the ADS9815RSHT, enabling drop-in speed upgrades in existing designs.
What are the power supply requirements for the ADS9817RSHT?
The ADS9817RSHT requires three independent supplies: AVDD_5V (4.75–5.25 V) for analog circuitry, VDD_1V8 (1.75–1.85 V) for the digital core, and IOVDD (1.15–1.85 V) for the CMOS data interface. This separation minimizes noise coupling and supports mixed-voltage system integration without level translators.
ADS9817RSHT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 56-VFQFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 18
- Sampling Rate (Per Second):
- 2M
- Number of Inputs:
- 8, 16
- Input Type:
- Differential, Single Ended
- Data Interface:
- Serial, SPI
- Configuration:
- MUX-PGA-ADC
- Ratio - S/H:ADC:
- 0:8
- Number of A/D Converters:
- 8
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 1.75V ~ 1.85V, 4.75V ~ 5.25V
- Voltage - Supply, Digital:
- 1.15V ~ 1.85V
- Features:
- Over-Voltage Protection, PGA
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 56-VQFN (7x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS9817RSHT FAQ
1.How can I place an order for ADS9817RSHT through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS9817RSHT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ADS9817RSHT reliable?
The price and inventory of ADS9817RSHT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS9817RSHT is usually 5 days.
3.What payment methods are accepted for ADS9817RSHT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS9817RSHT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS9817RSHT?
ADS9817RSHT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS9817RSHT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ADS9817RSHT?
For technical support, including ADS9817RSHT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS9817RSHT requirements.
6.How does Aetrix verify that ADS9817RSHT is sourced from the original manufacturer or authorized distributors?
All ADS9817RSHT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADS9817RSHT meets industry standards.
7.What is the process for return or replacement of ADS9817RSHT?
All ADS9817RSHT units undergo pre-shipment inspection (PSI). If there is an issue with ADS9817RSHT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ADS9817RSHT part is unused and in its original packaging.
Return procedure for ADS9817RSHT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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