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Texas Instruments ADS8327IBPWG4
- Part No.:
- ADS8327IBPWG4
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADS8327IBPWG4.pdf
- Description:
- IC ADC 16BIT SAR 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,241
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Product details
Overview
ADS8327IBPWG4 from Texas Instruments is a 16-bit, 500-kSPS unipolar-input SAR analog-to-digital converter with integrated sample-and-hold, internal conversion clock, and SPI/DSP-compatible serial interface. It delivers ±1 LSB max DNL, ±1.5 LSB max INL, 91 dB SNR at 10 kHz, and operates from 2.7 V to 5.5 V analog supply. It is used in high-precision transducer interface and medical instrument data acquisition systems.
For engineers reviewing the ADS8327IBPWG4 datasheet, ADS8327IBPWG4 pinout, ADS8327IBPWG4 application, or ADS8327IBPWG4 equivalent, key selection criteria include unipolar input range (0 V to VREF), deep power-down mode (2–50 nA), 16-pin TSSOP package, and EOC/INT programmable polarity for real-time system synchronization.
Technical Context
The ADS8327IBPWG4 implements a capacitor-based successive approximation register (SAR) architecture with inherent sample-and-hold, enabling single-shot conversion without external hold circuitry. Its built-in 10.5–12.2 MHz internal conversion clock eliminates need for external timing components.
It supports both manual and auto trigger modes, with configurable EOC/INT output polarity and daisy-chain operation via CDI/SDO routing. The device uses straight-binary data format and accepts external reference voltages up to 4.096 V with 80 kΩ input impedance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - guarantees monotonic output with no missing codes over full temperature range. |
| Sampling Rate | 500 kSPS - enables real-time capture of signals up to 250 kHz (Nyquist-limited) in continuous acquisition. |
| INL / DNL | ±1.5 LSB max / ±1 LSB max - ensures accurate amplitude fidelity for precision measurement applications. |
| SNR @ 10 kHz | 91 dB - supports >15-bit effective resolution for low-noise sensor signal digitization. |
| Power Dissipation | 10.6 mW at 2.7 V - enables battery-powered portable instrumentation with minimal thermal load. |
| Supply Range | +VA: 2.7–5.5 V; +VBD: 1.65–1.5×(+VA) - allows flexible dual-rail I/O interfacing with microcontrollers. |
| Reference Input | VREF = 2.5 V or 4.096 V - supports standard precision references without scaling circuitry. |
Pinout & Package
ADS8327IBPWG4 is housed in a 16-pin TSSOP (PW) package with exposed thermal pad internally connected to substrate. Pin 1 is +VA; pin 16 is +VBD; pins 7 and 6 are REF+ and REF− respectively; pin 10 is EOC/INT/CDI; pin 11 is FS/CS; pin 15 is SCLK; pin 13 is SDO; pin 12 is SDI; pins 3 and 4 are +IN and −IN; pin 5 is AGND; pin 14 is BDGND; pin 9 is CONVST; pin 8 is NC; pin 2 is RESERVED (connect to AGND or +VA).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN (Pin 3) | Analog input | Noninverting input for unipolar differential measurement; referenced to −IN (typically AGND). |
| −IN (Pin 4) | Analog input | Inverting input; must be tied to AGND for unipolar operation per datasheet configuration. |
| REF+ (Pin 7) | Reference input | Accepts external voltage reference (2.5 V or 4.096 V); defines full-scale range as 0 V to VREF. |
| REF− (Pin 6) | Reference return | Must connect directly to AGND via dedicated via to minimize noise coupling into reference path. |
| CONVST (Pin 9) | Control input | Edge-triggered start signal; freezes sample-and-hold and initiates conversion on next internal clock edge. |
| EOC/INT/CDI (Pin 10) | Status/output | Programmable status pin: EOC (default active-low), INT (programmable pulse), or CDI (daisy-chain data input). |
| FS/CS (Pin 11) | Interface control | Chip select for SPI or frame sync for DSP interfaces; enables serial communication and controls SDO 3-state behavior. |
| SCLK (Pin 15) | Serial clock | Supports up to 50 MHz externally; can serve as I/O clock only or both I/O and conversion clock (1–21 MHz range). |
| SDO (Pin 13) | Serial output | 3-state CMOS output; outputs 16-bit straight-binary result MSB-first; tri-states when CS is high. |
| SDI (Pin 12) | Serial input | Accepts configuration bits for EOC/INT polarity, TAG bit, and channel select (ADS8328 only); not used for ADS8327IBPWG4 configuration. |
Key Features
| Feature | Design Value |
|---|---|
| Built-in conversion clock (CCLK) | 10.5–12.2 MHz internal oscillator eliminates external crystal or clock generator, reducing BOM count and layout complexity. |
| Deep power-down mode | 2–50 nA quiescent current enables ultra-low-power sleep states in portable or energy-harvesting systems. |
| Programmable EOC/INT polarity | Configurable active-high/active-low status output simplifies interrupt handling across diverse MCU families without level-shifting. |
| Unipolar input range | 0 V to VREF (2.5 V or 4.096 V) eliminates need for input offset/bias circuitry in single-supply sensor front-ends. |
| Multi-chip daisy chain mode | Enables synchronized sampling across multiple ADS8327 devices using shared SCLK and CS, reducing controller GPIO requirements. |
Applications
| Transducer Interface | Medical Instrumentation |
|---|---|
Use Scenario: Digitizing low-level output from strain gauges, RTDs, or pressure sensors with millivolt-level spans. IC Role / Device Role / Timing Role: Precision ADC with integrated sample-and-hold and low-offset error (±0.5 mV max at 2.7 V) directly interfaces sensor bridges without signal conditioning. Use Value: Delivers 16-bit linearity (±1.5 LSB INL) and 91 dB SNR to resolve sub-μV changes in industrial-grade transducers. | Use Scenario: High-fidelity acquisition of ECG, EEG, or blood oxygen saturation signals in portable diagnostic equipment. IC Role / Device Role / Timing Role: Low-noise, low-power ADC providing clean digital samples for real-time waveform analysis and storage. Use Value: 10.6 mW power at 2.7 V and 91 dB SNR enable battery-operated devices with >8-hour runtime and clinical-grade signal integrity. |
| Industrial Process Control | Data Acquisition Systems |
Use Scenario: Monitoring analog process variables (temperature, flow, pH) in PLC I/O modules with isolated field-side inputs. IC Role / Device Role / Timing Role: Unipolar ADC accepting 0–5 V or 0–10 V sensor outputs; supports daisy-chained readout for multi-channel scan architectures. Use Value: ±1 LSB DNL and programmable EOC ensure deterministic timing for synchronized control loop updates across distributed nodes. | Use Scenario: Modular benchtop DAQ units requiring high-resolution, low-jitter sampling for lab-grade measurements. IC Role / Device Role / Timing Role: Standalone SAR ADC with internal CCLK and SPI interface, minimizing external timing components and firmware overhead. Use Value: 10 ps aperture jitter and 5 ns aperture delay preserve signal phase accuracy for FFT-based spectral analysis up to 100 kHz. |
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 |
|---|---|---|---|
| ADS8326IPW | 16-bit, 500 kSPS, but lacks internal CCLK; requires external clock source and has higher offset error (±2 mV). | Not suitable for space-constrained designs where clock generation ICs must be minimized. | Select ADS8326IPW only if external clock distribution already exists and lower cost outweighs added board area. |
| AD7682ACPZ-RL7 | 16-bit, 250 kSPS, SPI interface, no internal clock; features pseudo-differential inputs and lower power (1.2 mW at 100 kSPS). | Lower throughput limits use in high-speed transient capture; different input structure requires redesign of front-end biasing. | Choose AD7682ACPZ-RL7 for ultra-low-power, lower-throughput applications where 250 kSPS suffices and external clock is acceptable. |
Compared with ADS8326IPW and AD7682ACPZ-RL7, ADS8327IBPWG4 uniquely integrates the conversion clock and delivers higher throughput (500 kSPS) with tighter DC specs (±1 LSB DNL, ±0.5 mV offset), making it optimal for compact, high-accuracy, self-timed measurement systems.
Availability
ADS8327IBPWG4 is available at Aetrix Electronics and suitable for transducer interface, medical instrumentation, and industrial process control applications requiring stable component supply and guaranteed long-term sourcing.
Supply support for ADS8327IBPWG4 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, embedded processing, and connectivity technologies with over 90 years of innovation in precision signal chain solutions.
The ADS8327IBPWG4 belongs to TI's precision SAR ADC product line, designed specifically for high-resolution, low-power data acquisition in space- and power-constrained industrial and medical systems.
FAQ
What is the maximum external SCLK frequency supported by ADS8327IBPWG4?
The ADS8327IBPWG4 supports an external SCLK frequency up to 50 MHz when used solely as an I/O clock. When SCLK also serves as the conversion clock, the valid range is 1–21 MHz. This dual-mode flexibility allows designers to optimize between interface speed and conversion timing control without changing hardware.
Does ADS8327IBPWG4 require an external reference voltage?
Yes, ADS8327IBPWG4 requires an external reference voltage applied between REF+ (Pin 7) and REF− (Pin 6). It supports 2.5 V or 4.096 V references; REF− must be connected directly to AGND. No internal reference is provided, ensuring design flexibility and accuracy matching the chosen reference IC.
Can ADS8327IBPWG4 operate with a 1.8-V I/O supply?
Yes, ADS8327IBPWG4 supports +VBD from 1.65 V to 1.5×(+VA), so with +VA = 2.7 V, +VBD may be as low as 1.65 V - fully compatible with 1.8-V logic interfaces. The device maintains specified VIH/VIL thresholds and output drive strength across this range, enabling direct connection to 1.8-V microcontrollers.
What is the purpose of the RESERVED pin (Pin 2) on ADS8327IBPWG4?
The RESERVED pin (Pin 2) on ADS8327IBPWG4 has no internal connection and must be tied to either AGND or +VA per the datasheet. Leaving it floating may cause noise coupling or latch-up risk; grounding it is recommended for stability in noisy industrial environments.
How does the deep power-down mode affect wake-up time for ADS8327IBPWG4?
In deep power-down mode, ADS8327IBPWG4 draws 2–50 nA and requires a minimum wake-up time of 10 μs after exiting power-down before the first valid conversion. This interval allows internal bias circuits and reference path to stabilize, ensuring full DC and AC performance is restored prior to sampling.
ADS8327IBPWG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
ADS8327IBPWG4 FAQ
1.How can I place an order for ADS8327IBPWG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8327IBPWG4 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 ADS8327IBPWG4 reliable?
The price and inventory of ADS8327IBPWG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8327IBPWG4 is usually 5 days.
3.What payment methods are accepted for ADS8327IBPWG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8327IBPWG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8327IBPWG4?
ADS8327IBPWG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8327IBPWG4 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 ADS8327IBPWG4?
For technical support, including ADS8327IBPWG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8327IBPWG4 requirements.
6.How does Aetrix verify that ADS8327IBPWG4 is sourced from the original manufacturer or authorized distributors?
All ADS8327IBPWG4 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 ADS8327IBPWG4 meets industry standards.
7.What is the process for return or replacement of ADS8327IBPWG4?
All ADS8327IBPWG4 units undergo pre-shipment inspection (PSI). If there is an issue with ADS8327IBPWG4, 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 ADS8327IBPWG4 part is unused and in its original packaging.
Return procedure for ADS8327IBPWG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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