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Texas Instruments ADS8695IPWR
- Part No.:
- ADS8695IPWR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADS8695IPWR.pdf
- Description:
- IC ADC 18BIT SAR 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,328
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Product details
Overview
ADS8695IPWR from Texas Instruments is an 18-bit, single-supply SAR analog-to-digital converter with integrated analog front-end, programmable bipolar/unipolar input ranges (±12.288 V to ±2.56 V or 0–12.288 V), 500 kSPS throughput, and on-chip 4.096-V reference. It delivers ±1.5 LSB INL, 92.5 dB SNR, and ±20 V input overvoltage protection, targeting high-precision industrial data acquisition systems.
For engineers reviewing the ADS8695IPWR datasheet, ADS8695IPWR pinout, ADS8695IPWR application, or ADS8695IPWR equivalent, key selection considerations include its software-programmable input ranges, multiSPI™ daisy-chain interface, 1 MΩ minimum input impedance across all ranges, extended –40°C to +125°C operation, and TSSOP-16 package compatibility with space-constrained industrial DAQ modules.
Technical Context
The ADS8695IPWR implements a successive approximation register (SAR) ADC architecture with integrated PGA, second-order LPF, and overvoltage protection circuitry enabling direct connection to ±20 V field signals without external clamping. Its analog front-end maintains ≥1 MΩ resistive input impedance regardless of selected range, eliminating gain-dependent loading effects.
It supports three serial interface modes - standard SPI, multiSPI™ daisy-chain, and source-synchronous (internal/external clock) - with configurable SDO outputs (SDO-0/SDO-1), ALARM threshold monitoring, and RVS status signaling. The device uses a single 5-V AVDD supply while accepting 1.65–5-V DVDD for flexible I/O interfacing with modern microcontrollers and FPGAs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 18-bit - guarantees monotonic output and no missing codes across full temperature range. |
| Sampling Rate | 500 kSPS - enables real-time capture of signals up to ~15 kHz bandwidth (–3 dB point). |
| INL / DNL | ±1.5 LSB / ±0.6 LSB - ensures <0.004% full-scale accuracy for precision sensor and test equipment calibration. |
| SNR / THD | 92.5 dB / –110 dB - supports high-fidelity digitization of low-distortion sine waves and complex waveforms. |
| Input Ranges | Software-selectable: ±12.288 V, ±10.24 V, ±6.144 V, ±5.12 V, ±2.56 V, or 0–12.288 V, 0–10.24 V, 0–6.144 V, 0–5.12 V - eliminates external gain-switching hardware. |
| Reference | On-chip 4.096-V reference with 4–7 ppm/°C drift - provides stable scaling without external voltage reference ICs or trimming. |
| Overvoltage Protection | ±20 V (AVDD = 5 V) - allows safe operation in noisy industrial environments with transient surges on analog inputs. |
Pinout & Package
TSSOP-16 package (5.00 mm × 4.40 mm), thermally enhanced for industrial ambient operation up to +125°C. Pinout validated per TI SBAS777B datasheet Figure 5-1 and Table 5-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN_P / AIN_GND | Differential analog input pair | Accepts true bipolar or unipolar signals; maintains ≥1 MΩ impedance regardless of range selection. |
| CONVST/CS | Dual-function digital control | Active-high conversion trigger or active-low chip select - enables flexible timing and multi-device bus sharing. |
| SDO-0 / SDO-1 | Serial data outputs | Support multiSPI™ daisy-chain configuration; SDO-1 doubles as ALARM output or GPO. |
| REFIO / REFCAP / REFGND | Reference subsystem terminals | REFIO outputs internal 4.096 V or accepts external reference; REFCAP requires 10 µF decoupling for stability. |
| RST / RVS | Reset and status signaling | Active-low asynchronous reset; RVS reflects internal ADCST state or protocol-specific handshake timing. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable input ranges | 9 software-configurable ranges (5 bipolar + 4 unipolar) eliminate external signal conditioning components and simplify firmware-driven range switching. |
| multiSPI™ interface | Backward-compatible with standard SPI while supporting daisy-chain topology - reduces host GPIO count and simplifies multi-channel system expansion. |
| Integrated overvoltage protection | ±20 V tolerance on AIN_P/AIN_GND with AVDD = 5 V - removes need for external TVS diodes or discrete clamp circuits in PLC analog input modules. |
| Constant input impedance | ≥1 MΩ across all ranges - prevents measurement error due to source impedance interaction, critical for high-Z sensors and legacy instrumentation interfaces. |
| Extended temperature range | –40°C to +125°C operation - qualified for under-hood automotive ECUs, motor drives, and industrial control cabinets without derating. |
Applications
| Analog Input Modules | Data Acquisition Systems |
|---|---|
|
Use Scenario: Modular PLC analog input cards acquiring voltage/current signals from field transmitters in factory automation. IC Role / Device Role / Timing Role: Primary ADC with integrated front-end, handling range switching, overvoltage protection, and SPI-based data streaming to controller. Use Value: Eliminates external op-amps, references, and protection components-reducing BOM cost and PCB area by >30% versus discrete solutions. |
Use Scenario: Benchtop DAQ units performing synchronized multi-channel measurements for semiconductor parametric testing. IC Role / Device Role / Timing Role: High-accuracy, low-latency sampling node with deterministic conversion timing and ALARM-triggered event capture. Use Value: 92.5 dB SNR and ±1.5 LSB INL enable sub-0.01% measurement repeatability required for wafer-level characterization. |
| LCD Panel Testing | Semiconductor Test Equipment |
|
Use Scenario: Automated test systems verifying gamma correction and uniformity of OLED/LCD display drivers via precision voltage sweeps. IC Role / Device Role / Timing Role: Digitizer for feedback loop closure in programmable voltage sources, capturing pixel-level response with calibrated full-scale linearity. Use Value: Software-selectable 0–12.288 V range matches display bias rail requirements; 500 kSPS supports fast pixel-by-pixel scanning. |
Use Scenario: ATE systems validating ADC/DAC performance of mixed-signal SoCs using known-good reference stimuli. IC Role / Device Role / Timing Role: Metrology-grade reference ADC providing traceable digitization of device-under-test outputs during functional and parametric tests. Use Value: On-chip 4.096-V reference with <7 ppm/°C drift ensures measurement stability across thermal soak cycles without recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8685IPWR | 16-bit resolution, 500 kSPS, same TSSOP-16 package and multiSPI™ interface, but lacks on-chip reference and ±20 V OVP. | Lower-cost alternative where 16-bit accuracy suffices and external reference/OVP circuitry is acceptable. | Select ADS8685IPWR when system-level calibration compensates for reference drift and external protection is already present. |
| AD7606C-18BSTZ | 18-bit, 1 MSPS, parallel + SPI interface, ±16.5 V OVP, but requires dual ±5 V supplies and has fixed ±10 V input range. | Better suited for high-throughput, multi-channel simultaneous-sampling systems with existing dual-supply infrastructure. | Choose AD7606C-18BSTZ only if simultaneous sampling across ≥2 channels is mandatory and board space allows larger LQFP-64 package. |
Compared with ADS8685IPWR and AD7606C-18BSTZ, the ADS8695IPWR uniquely combines 18-bit precision, software-programmable ranges, single 5-V supply, and ±20 V robustness in a compact TSSOP-16 - making it optimal for upgrade paths from 16-bit designs and space-constrained industrial DAQ nodes requiring field-replaceable flexibility.
Availability
ADS8695IPWR is available at Aetrix Electronics and suitable for analog input modules, data acquisition systems, and semiconductor test equipment requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for ADS8695IPWR 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 converters and industrial signal chain solutions.
The ADS869x family was designed specifically for ruggedized, high-accuracy industrial data acquisition - integrating front-end protection, programmable ranges, and robust serial interfaces to reduce system design complexity and time-to-market.
FAQ
What is the maximum input voltage range supported by the ADS8695IPWR?
The ADS8695IPWR supports nine software-programmable input ranges: five bipolar (±12.288 V, ±10.24 V, ±6.144 V, ±5.12 V, ±2.56 V) and four unipolar (0–12.288 V, 0–10.24 V, 0–6.144 V, 0–5.12 V). All ranges are internally calibrated for gain and offset, and the device maintains ≥1 MΩ input impedance across every setting. The ADS8695IPWR tolerates up to ±20 V on AIN_P/AIN_GND when AVDD = 5 V, ensuring robustness against field transients.
Does the ADS8695IPWR require an external reference voltage?
No, the ADS8695IPWR includes a highly stable on-chip 4.096-V reference with 4–7 ppm/°C temperature drift and 20-ms turn-on time (with 10 µF REFCAP). REFIO can be configured as an output to drive external circuitry or as an input to accept a precision external reference - but external reference is optional. The ADS8695IPWR achieves full specified performance using only its internal reference, reducing BOM count and layout complexity.
What serial interface protocols does the ADS8695IPWR support?
The ADS8695IPWR supports three interoperable serial modes: standard SPI (CPOL/CPHA configurable), multiSPI™ daisy-chain (using SDO-0 and SDO-1), and source-synchronous interfaces (with internal or external clock). All modes operate up to 66.67 MHz SCLK and maintain backward compatibility. The ADS8695IPWR's RVS pin provides real-time status feedback, and ALARM/SDO-1/GPO enables threshold-triggered interrupt signaling - simplifying host-controller integration without additional logic.
How does the ADS8695IPWR handle input overvoltage conditions?
The ADS8695IPWR integrates dedicated overvoltage protection circuitry on AIN_P and AIN_GND pins, rated for ±20 V when AVDD = 5 V and ±15 V when AVDD is floating. This protection operates independently of the selected input range and does not degrade accuracy or introduce leakage. The ADS8695IPWR continues normal operation after transient events, eliminating the need for external TVS diodes or series resistors in most industrial installations - verified per TI SBAS777B Absolute Maximum Ratings and Input Overvoltage Protection Circuit sections.
What is the operating temperature range of the ADS8695IPWR?
The ADS8695IPWR is specified for continuous operation from –40°C to +125°C ambient temperature, qualified per extended industrial standards. Thermal metrics (RθJA = 95.7°C/W, RθJB = 41.5°C/W) confirm reliable performance in sealed enclosures or high-power-density systems. The ADS8695IPWR maintains full electrical specifications - including ±1.5 LSB INL and 92.5 dB SNR - across this entire range, making it suitable for under-hood automotive, motor control, and outdoor industrial deployments.
ADS8695IPWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 18
- Sampling Rate (Per Second):
- 500k
- Number of Inputs:
- 1
- Input Type:
- Pseudo-Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- PGA-ADC
- Ratio - S/H:ADC:
- 0:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- Internal
- Voltage - Supply, Analog:
- 4.75V ~ 5.25V
- Voltage - Supply, Digital:
- 1.65V ~ 5.25V
- Features:
- Internal Oscillator, PGA
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 16-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS8695IPWR FAQ
1.How can I place an order for ADS8695IPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8695IPWR 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 ADS8695IPWR reliable?
The price and inventory of ADS8695IPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8695IPWR is usually 5 days.
3.What payment methods are accepted for ADS8695IPWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8695IPWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8695IPWR?
ADS8695IPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8695IPWR 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 ADS8695IPWR?
For technical support, including ADS8695IPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8695IPWR requirements.
6.How does Aetrix verify that ADS8695IPWR is sourced from the original manufacturer or authorized distributors?
All ADS8695IPWR 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 ADS8695IPWR meets industry standards.
7.What is the process for return or replacement of ADS8695IPWR?
All ADS8695IPWR units undergo pre-shipment inspection (PSI). If there is an issue with ADS8695IPWR, 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 ADS8695IPWR part is unused and in its original packaging.
Return procedure for ADS8695IPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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