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Texas Instruments ADS8318IBDRCR
- Part No.:
- ADS8318IBDRCR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
ADS8318IBDRCR.pdf
- Description:
- IC ADC 16BIT SAR 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:4,019
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Product details
Overview
ADS8318IBDRCR from Texas Instruments is a 16-bit, 500-kSPS successive approximation register (SAR) analog-to-digital converter with unipolar differential input range (–Vref to +Vref), SPI-compatible serial interface, ±1.0 LSB max INL, ±0.75 LSB max DNL, and 95.2 dB SNR at 10 kHz - used in precision battery-powered data acquisition systems.
For engineers reviewing the ADS8318IBDRCR datasheet, ADS8318IBDRCR pinout, ADS8318IBDRCR application, or ADS8318IBDRCR equivalent, key selection considerations include its 10-pin SON package, zero-latency operation at full speed, 2.048–5.5 V reference input range, 18 mW typical power dissipation at 500 kSPS, and daisy-chain capability for multi-channel synchronization.
Technical Context
The ADS8318IBDRCR implements a capacitor-based SAR architecture with inherent sample-and-hold, enabling zero-latency conversion at full 500-kSPS throughput. Its internal clock drives fixed-duration conversion (1400 ns typ), independent of external timing.
It supports two primary interface modes: CS mode (3- or 4-wire) and daisy-chain mode, selected by SDI logic level at CONVST rising edge. The device outputs 16-bit data synchronously with SCLK and optionally includes a leading busy indicator bit.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 1 LSB = Vref/65536 quantization step for high-precision measurement |
| Sample Rate | 500 kSPS - enables real-time capture of signals up to 250 kHz Nyquist bandwidth |
| INL / DNL | ±1.0 LSB max / ±0.75 LSB max - ensures monotonicity and accurate end-point linearity in closed-loop control |
| SNR @ 10 kHz | 95.2 dB typ - supports >15.5 ENOB for low-noise sensor signal digitization |
| Power Dissipation | 18 mW typ at 500 kSPS - scales linearly to 3.6 mW/100 kSPS for adaptive power management |
| Reference Range | 2.048 V to 5.5 V - allows flexible system-level reference sourcing (e.g., 2.5 V, 4.096 V, or 5 V) |
| Power-Down Current | 0.25 µW typ - reduces standby consumption in intermittent-sampling applications |
Pinout & Package
ADS8318IBDRCR is housed in a 10-pin 3 mm × 3 mm SON package (DRC), optimized for space-constrained PCB layouts and thermal performance (θJA = 70°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 REFIN | Reference input | Positive reference voltage terminal; requires 0.1 µF bypass + 10 µF storage capacitor to GND for stable conversion accuracy |
| 2 +VA | Analog supply | 4.5–5.5 V analog power rail; decoupled to GND to minimize noise coupling into SAR core |
| 3 +IN | Analog input (+) | Noninverting differential input; accepts common-mode voltage at Vref/2 for unipolar differential operation |
| 4 –IN | Analog input (–) | Inverting differential input; forms differential pair with +IN; both inputs disconnected during conversion |
| 5 GND | Common ground | Shared return for +VA and +VBD; critical for minimizing PSRR degradation and offset drift |
| 6 CONVST | Conversion start / CS | Rising edge initiates sampling; functions as chip select in CS mode; timing-critical for synchronization |
| 7 SDO | Serial data output | 3-state SPI-compatible output; transmits MSB first; driven only when CONVST is low or busy active |
| 8 SCLK | Serial clock input | Accepts up to 50 MHz clock; falling edge triggers data valid on SDO for synchronous readout |
| 9 SDI | Serial data input | Mode-select input sampled at CONVST rising edge; determines CS vs. daisy-chain and busy/no-busy operation |
| 10 +VBD | Digital I/O supply | 2.375–5.5 V digital rail; powers interface logic; must be decoupled independently from +VA |
Key Features
| Feature | Design Value |
|---|---|
| Zero-latency conversion | Delivers fully settled 16-bit result immediately after conversion completes - no pipeline delay for real-time control loops |
| SPI-compatible daisy chain | Enables cascading of multiple ADS8318 devices using single SCLK/SDI/SDO lines - reduces PCB trace count and host GPIO usage |
| Unipolar differential input | Supports –Vref to +Vref differential swing with Vref/2 common-mode - simplifies front-end driver design for bipolar signal conditioning |
| Auto power-down | Enters ultra-low-power state (<0.3 µW) automatically after conversion completion - eliminates need for explicit sleep commands |
| Busy indicator option | Optional leading status bit indicates conversion readiness - removes polling overhead and improves deterministic host timing |
Applications
| Battery-Powered Data Loggers | Industrial Process Monitoring |
|---|---|
Use Scenario: Continuous 16-bit voltage/current logging in portable environmental sensors powered by coin-cell or Li-ion batteries. IC Role / Device Role / Timing Role: Primary ADC capturing analog sensor outputs at 100–500 kSPS with minimal power draw and no external sample-hold circuitry. Use Value: 18 mW typical power at full speed and 0.25 µW power-down current extend battery life while maintaining resolution for long-term deployment. | Use Scenario: High-accuracy analog input module in PLC I/O cards measuring 4–20 mA loop signals and thermocouple outputs. IC Role / Device Role / Timing Role: Precision SAR ADC interfacing to isolated signal conditioners; synchronized via CONVST across multiple channels. Use Value: ±1.0 LSB INL and 95.2 dB SNR ensure compliance with IEC 61000-4-30 Class A measurement accuracy requirements. |
| Medical Patient Monitoring | Optical Network Diagnostics |
Use Scenario: Digitizing ECG, EEG, or bioimpedance waveforms in handheld diagnostic tools requiring low noise and galvanic isolation. IC Role / Device Role / Timing Role: Isolated-side ADC operating in 3-wire CS mode to minimize optocoupler count; zero-latency output enables real-time waveform analysis. Use Value: 6 ps aperture jitter and –108 dB THD at 10 kHz preserve signal fidelity for clinical-grade interpretation. | Use Scenario: Real-time monitoring of laser bias current and photodiode feedback in fiber-optic transceivers. IC Role / Device Role / Timing Role: Fast-response ADC sampling analog monitor outputs at 500 kSPS; daisy-chained with other ADS8318 units for multi-parameter telemetry. Use Value: 1400 ns fixed conversion time and 600 ns acquisition enable tight closed-loop control of optical power without timing uncertainty. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8320IBDRCR | 16-bit, 1-MSPS, same 10-pin SON package but higher power (30 mW typ), no daisy-chain mode | Higher-speed applications where latency tolerance permits pipelined architecture; lacks busy indicator and daisy-chain flexibility | Select when throughput >500 kSPS is required and interface simplicity is prioritized over multi-device synchronization |
| AD7682BRMZ | 16-bit, 250-kSPS, 10-lead MSOP, SPI interface, ±1.5 LSB INL, no daisy-chain support | Lower-power, lower-speed instrumentation where TI's daisy-chain capability is not needed and ADI ecosystem integration is preferred | Choose for legacy ADI-based designs or when 250-kSPS suffices and board space allows MSOP instead of SON |
Compared with ADS8320IBDRCR and AD7682BRMZ, the ADS8318IBDRCR uniquely balances 500-kSPS speed, ultra-low power scaling, daisy-chain capability, and zero-latency operation - making it optimal for compact, multi-channel, battery-aware precision acquisition systems.
Availability
ADS8318IBDRCR is available at Aetrix Electronics and suitable for battery-powered equipment, industrial process monitoring, medical diagnostics, and optical network telemetry requiring stable component supply and long-term manufacturability.
Supply support for ADS8318IBDRCR 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 low-power signal chain solutions.
The ADS8318IBDRCR belongs to TI's precision SAR ADC product line, designed specifically for high-resolution, low-power, space-constrained applications including portable instrumentation and distributed sensing nodes.
FAQ
What is the maximum sampling rate supported by the ADS8318IBDRCR?
The ADS8318IBDRCR supports a maximum sampling rate of 500 kSPS, with fixed 1400 ns conversion time and 600 ns acquisition time. This enables full 16-bit resolution at sustained throughput without pipeline delay or missing codes, verified across –40°C to +85°C operating temperature range.
Does the ADS8318IBDRCR require an external clock source for conversion?
No, the ADS8318IBDRCR uses an internal clock for SAR conversion and does not require an external clock input for core ADC operation. The SCLK signal is used solely for serial data transfer; conversion timing is autonomous and deterministic, ensuring zero-latency output at 500 kSPS.
How does the daisy-chain interface mode work on the ADS8318IBDRCR?
The ADS8318IBDRCR enters daisy-chain mode when SDI is low at the CONVST rising edge. In this mode, multiple devices share SCLK and SDI lines; SDO of one device connects to SDI of the next. A single 16×N-bit frame reads all N devices' results sequentially, reducing host interface complexity and PCB routing.
What is the reference voltage range supported by the ADS8318IBDRCR?
The ADS8318IBDRCR supports an external reference voltage range of 2.048 V to 5.5 V on the REFIN pin. Operation at 2.048 V yields 31.25 µV LSB, while 5 V yields 76.3 µV LSB - allowing trade-offs between resolution, noise floor, and system reference availability.
Can the ADS8318IBDRCR operate with separate analog and digital supplies?
Yes, the ADS8318IBDRCR features independent +VA (analog supply, 4.5–5.5 V) and +VBD (digital I/O supply, 2.375–5.5 V) pins. This separation allows optimization of noise isolation - e.g., +VA from low-noise LDO, +VBD from noisy system rail - while maintaining full 16-bit performance and specified PSRR of 80 dB.
ADS8318IBDRCR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- microPOWER™
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 500k
- Number of Inputs:
- 1
- Input Type:
- Differential
- 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:
- 2.375V ~ 5.5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 10-VSON (3x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS8318IBDRCR FAQ
1.How can I place an order for ADS8318IBDRCR through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8318IBDRCR 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 ADS8318IBDRCR reliable?
The price and inventory of ADS8318IBDRCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8318IBDRCR is usually 5 days.
3.What payment methods are accepted for ADS8318IBDRCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8318IBDRCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8318IBDRCR?
ADS8318IBDRCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8318IBDRCR 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 ADS8318IBDRCR?
For technical support, including ADS8318IBDRCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8318IBDRCR requirements.
6.How does Aetrix verify that ADS8318IBDRCR is sourced from the original manufacturer or authorized distributors?
All ADS8318IBDRCR 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 ADS8318IBDRCR meets industry standards.
7.What is the process for return or replacement of ADS8318IBDRCR?
All ADS8318IBDRCR units undergo pre-shipment inspection (PSI). If there is an issue with ADS8318IBDRCR, 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 ADS8318IBDRCR part is unused and in its original packaging.
Return procedure for ADS8318IBDRCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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