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Texas Instruments ADS8327IPW
- Part No.:
- ADS8327IPW
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADS8327IPW.pdf
- Description:
- IC ADC 16BIT SAR 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:182
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Product details
Overview
ADS8327IPW from Texas Instruments is a 16-bit, 500-kSPS unipolar-input SAR analog-to-digital converter with built-in conversion clock, SPI/DSP-compatible serial interface, and ±2 LSB max integral nonlinearity. It operates from 2.7 V to 5.5 V analog supply and delivers 91 dB SNR at 10 kHz, targeting precision data acquisition in medical instruments and industrial process control.
For engineers reviewing the ADS8327IPW datasheet, ADS8327IPW pinout, ADS8327IPW application, or ADS8327IPW equivalent, key selection considerations include its unipolar input range (0 V to VREF), 18-cycle conversion time, deep power-down mode (2–50 nA), TSSOP-16 package, and compatibility with daisy-chain configurations for multi-channel systems.
Technical Context
The ADS8327IPW implements a capacitor-based successive approximation register (SAR) architecture with integrated sample-and-hold, enabling single-shot or auto-triggered conversions. Its internal 10.5–12.2 MHz conversion clock eliminates external timing components while supporting up to 50 MHz external SCLK for high-speed serial readout.
It features programmable EOC/INT polarity, global CONVST independent of CS, and dual operation modes: manual trigger (3-cycle acquisition) and auto-trigger (3-cycle acquisition + automatic restart). The device supports chain mode via CDI/SDO routing and uses straight-binary output format with no missing codes over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit SAR with guaranteed no missing codes across –40°C to +85°C |
| Sampling Rate | 500 kSPS maximum throughput with 18-cycle conversion time |
| INL / DNL | ±2 LSB max integral linearity and ±1 LSB max differential linearity |
| SNR / THD | 91 dB signal-to-noise ratio and –96 dB total harmonic distortion at 10 kHz |
| Power Dissipation | 10.6 mW at 500 kSPS with +VA = 2.7 V and +VBD = 1.8 V |
| Reference Input | External unipolar reference (0.3 V to 4.2 V); supports 2.5 V or 4.096 V VREF |
| Supply Range | +VA: 2.7 V to 5.5 V; +VBD: 1.65 V to 1.5×(+VA), enabling mixed-voltage I/O interfacing |
Pinout & Package
TSSOP-16 package with exposed thermal pad (internally connected to substrate; recommended to connect to AGND or leave floating, isolated from digital ground).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| +VA | Analog supply input | Primary analog power rail (2.7–5.5 V); powers SAR core, reference buffer, and sample-and-hold |
| +IN | Analog input | Noninverting unipolar input (0 V to VREF); referenced to –IN or COM |
| –IN | Analog input | Inverting input, typically tied to AGND for single-ended operation |
| REF+ | Reference input | Positive terminal of external voltage reference (e.g., 2.5 V or 4.096 V) |
| REF− | Reference input | Negative terminal; must be connected to AGND via dedicated via |
| SCLK | Digital input | Serial clock for SPI/DSP interface; supports up to 50 MHz when used as I/O clock only |
| SDO | Digital output | 3-state serial data output; MSB-first straight-binary format; supports daisy-chain mode |
| SDI | Digital input | Serial data input for configuration commands (e.g., reset, polarity setup) |
| FS/CS | Digital input | Frame sync / chip select; active-low SPI slave select or DSP frame sync signal |
| CONVST | Digital input | Conversion start trigger; freezes sample-and-hold and initiates conversion on next internal clock edge |
| EOC/INT/CDI | Digital I/O | Configurable status pin: end-of-conversion flag, programmable-interrupt output, or chain-data input in daisy-chain mode |
| AGND | Analog ground | Return path for analog circuitry; must be separated from BDGND to minimize noise coupling |
| BDGND | Digital ground | Return path for interface logic (+VBD domain); kept separate from AGND per layout guidance |
| +VBD | I/O supply | Buffer/digital interface supply (1.65–5.5 V); sets logic thresholds for SDI/SDO/FS/CS |
| NC | No connection | No internal connection; must be left unconnected or tied to AGND per PCB design rules |
Key Features
| Feature | Design Value |
|---|---|
| Built-in conversion clock (CCLK) | Eliminates need for external oscillator; internal 10.5–12.2 MHz clock enables self-timed conversion |
| Deep power-down mode | Reduces supply current to 2–50 nA, enabling ultra-low-power sleep states in battery-operated systems |
| Programmable EOC/INT polarity | Allows firmware to configure active-high or active-low interrupt signaling without external logic inversion |
| Global CONVST independent of CS | Enables synchronized sampling across multiple converters even when CS lines are individually controlled |
| Daisy-chain capability | Supports multi-device serial cascading using CDI/SDO routing, reducing GPIO count in channel-dense systems |
Applications
| Medical Instrumentation | Industrial Process Control |
|---|---|
Use Scenario: High-resolution measurement of biopotential signals (e.g., ECG, EEG) with low noise and stable DC accuracy. IC Role / Device Role / Timing Role: Primary ADC capturing analog sensor outputs with 16-bit resolution and <±2 LSB INL over temperature. Use Value: Enables clinical-grade accuracy with 91 dB SNR and ±0.5 mV offset error at 2.7 V, meeting IEC 60601-2-27 requirements. | Use Scenario: Monitoring and feedback control of pressure, temperature, and flow sensors in PLC analog input modules. IC Role / Device Role / Timing Role: Precision front-end digitizer interfacing with 4–20 mA transducers and RTDs via programmable gain amplifiers. Use Value: Delivers 16-bit NMC performance across –40°C to +85°C and supports daisy-chain configuration for compact multi-channel designs. |
| Data Acquisition Systems | Automatic Test Equipment |
Use Scenario: Modular DAQ cards requiring high-speed, low-power, and deterministic conversion timing for waveform capture. IC Role / Device Role / Timing Role: Standalone SAR ADC with 500 kSPS throughput, 18-cycle conversion, and programmable trigger modes. Use Value: Reduces system latency with manual/auto trigger options and supports chain-mode readout for synchronized multi-board acquisition. | Use Scenario: Calibration and stimulus-response testing of analog circuits where spectral purity and repeatability are critical. IC Role / Device Role / Timing Role: Reference-grade digitizer providing 100 dB SFDR and –96 dB THD for accurate harmonic analysis. Use Value: Ensures test validity with 91 dB SNR at 10 kHz and <10 ps aperture jitter, minimizing measurement uncertainty. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8328IPW | Dual-channel 2:1 MUX input with TAG bit output; identical core, timing, and power specs | Requires dual-sensor inputs or channel multiplexing; not pin-compatible due to +IN0/+IN1/COM pin mapping | Select when simultaneous sampling of two analog sources is required; requires PCB redesign for pinout |
| ADS8329IPW | 1-MSPS version with same 16-bit SAR architecture, TSSOP-16 package, and feature set | Higher throughput but increased power (14 mW vs. 10.6 mW at 2.7 V); identical interface and register map | Choose for bandwidth-critical applications where 500 kSPS is insufficient; verify thermal budget |
Compared with ADS8328IPW and ADS8329IPW, the ADS8327IPW provides optimal balance of power efficiency (10.6 mW), precision (±2 LSB INL), and simplicity for single-channel systems-making it ideal for space- and energy-constrained embedded DAQ where dual inputs or >500 kSPS are unnecessary.
Availability
ADS8327IPW is available at Aetrix Electronics and suitable for medical instrumentation, industrial process control, and data acquisition systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ADS8327IPW 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 and embedded processing technologies, with leadership in precision data converters and industrial-grade ICs.
The ADS8327IPW belongs to TI's low-power, high-speed SAR ADC product line, designed specifically for precision measurement applications demanding 16-bit resolution, sub-2 LSB nonlinearity, and flexible serial interfacing in harsh industrial and medical environments.
FAQ
What is the maximum sampling rate supported by the ADS8327IPW?
The ADS8327IPW supports a maximum sampling rate of 500 kSPS. This is achieved using its internal 10.5–12.2 MHz conversion clock and fixed 18-cycle conversion time. External SCLK can run up to 50 MHz for serial readout, but does not increase the sampling rate beyond 500 kSPS. The ADS8327IPW maintains full 16-bit performance-including ±2 LSB INL and 91 dB SNR-at this rate under specified supply and reference conditions.
Does the ADS8327IPW require an external reference voltage?
Yes, the ADS8327IPW requires an external unipolar reference voltage applied between REF+ and REF− pins. It supports reference ranges from 0.3 V to 4.2 V, commonly implemented with 2.5 V or 4.096 V precision references. REF− must be connected directly to AGND via a dedicated via to maintain accuracy; the device contains no internal reference. The ADS8327IPW's ±0.5 mV offset error at 2.7 V assumes proper external reference implementation.
How does the power-down functionality work on the ADS8327IPW?
The ADS8327IPW offers three power-down modes: Deep Power-Down (2–50 nA), Nap Power-Down (0.2–0.4 µA), and Auto Nap (automatic entry after conversion). These are controlled via SPI commands written to configuration registers. In Deep Power-Down, the internal clock and analog circuitry are disabled; wake-up requires CONVST pulse or CS activity. This enables ultra-low quiescent current in battery-powered ADS8327IPW applications such as portable medical monitors.
Can the ADS8327IPW operate with different analog and I/O supply voltages?
Yes, the ADS8327IPW supports independent analog (+VA: 2.7–5.5 V) and digital interface (+VBD: 1.65 V to 1.5×+VA) supplies. This allows interfacing with 1.8 V, 3.3 V, or 5 V controllers while maintaining full analog performance. For example, +VA = 2.7 V and +VBD = 1.8 V yields 10.6 mW total power, whereas +VA = 5 V and +VBD = 5 V increases dissipation to 38.5 mW. Logic thresholds scale with +VBD, ensuring robust signal integrity across mixed-voltage systems using ADS8327IPW.
Is the ADS8327IPW pin-compatible with other devices in the ADS832x family?
No, the ADS8327IPW is not pin-compatible with ADS8328IPW due to differing analog input pin assignments (+IN/–IN vs. +IN0/+IN1/COM) and reserved pin usage. However, it shares the same TSSOP-16 footprint and pinout with ADS8329IPW (1-MSPS variant) and ADS8330IPW (dual-channel 1-MSPS), enabling drop-in replacement where higher speed is acceptable. Always verify pin function mapping against the specific device's terminal functions table before board reuse.
ADS8327IPW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 500k
- Number of Inputs:
- 1
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 1.65V ~ 5.5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 16-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS8327IPW FAQ
1.How can I place an order for ADS8327IPW through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8327IPW 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 ADS8327IPW reliable?
The price and inventory of ADS8327IPW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8327IPW is usually 5 days.
3.What payment methods are accepted for ADS8327IPW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8327IPW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8327IPW?
ADS8327IPW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8327IPW 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 ADS8327IPW?
For technical support, including ADS8327IPW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8327IPW requirements.
6.How does Aetrix verify that ADS8327IPW is sourced from the original manufacturer or authorized distributors?
All ADS8327IPW 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 ADS8327IPW meets industry standards.
7.What is the process for return or replacement of ADS8327IPW?
All ADS8327IPW units undergo pre-shipment inspection (PSI). If there is an issue with ADS8327IPW, 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 ADS8327IPW part is unused and in its original packaging.
Return procedure for ADS8327IPW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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