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Texas Instruments ADS8320E/250G4
- Part No.:
- ADS8320E/250G4
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ADS8320E/250G4.pdf
- Description:
- IC ADC 16BIT SAR 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,630
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Product details
Overview
ADS8320E/250G4 from Texas Instruments is a 16-bit successive approximation register (SAR) analog-to-digital converter with differential input, serial SPI/SSI interface, and microPower operation. It delivers 100-kHz throughput at 1.8 mW (2.7 V), supports 2.7–5.25-V supply, features ±0.008% integral linearity error (ADS8320E grade), and operates in battery-powered remote data acquisition systems.
For engineers reviewing the ADS8320E/250G4 datasheet, ADS8320E/250G4 pinout, ADS8320E/250G4 application, or ADS8320E/250G4 equivalent, key selection considerations include its 16-bit resolution with guaranteed no missing codes, differential input architecture enabling remote ground sensing, low-power shutdown mode (≤3 µA), and compatibility with 3- or 5-V logic systems via level-tolerant digital inputs.
Technical Context
The ADS8320E/250G4 implements a capacitive redistribution SAR architecture with integrated sample-and-hold, fabricated in 0.6-µm CMOS. It acquires and converts analog signals without pipeline delay, outputting straight-binary 16-bit data most-significant-bit first on DOUT synchronized to DCLOCK's falling edge.
Its differential analog input (+In/–In) captures voltage difference during hold phase; –In is not resampled mid-conversion and is intended for remote ground sensing (–0.1 V to +1 V range). Reference voltage (0.5 V to VCC) sets full-scale span and directly scales LSB size (e.g., 76 µV at 5 V, 7.6 µV at 0.5 V), making noise and error terms critically reference-dependent.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - guarantees 65,536 discrete output codes with no missing codes (ADS8320E grade: 14-bit monotonicity) |
| Sampling Rate | 100 kHz - maximum sustained conversion rate; supports real-time vibration analysis and multichannel simultaneous sampling |
| Supply Voltage | 2.7 V to 5.25 V - enables direct integration into both 3.3-V and 5-V embedded systems without level-shifting |
| Power Dissipation | 1.8 mW at 100 kHz / 2.7 V - enables >100-hour operation on coin-cell batteries in portable DAQ modules |
| Integral Linearity | ±0.008% FSR - ensures <±5 LSB error across full scale at 5-V reference, critical for precision sensor interfacing |
| Reference Range | 0.5 V to VCC - allows flexible scaling (e.g., 1.25 V reference for 0–1.25 V sensor output, minimizing quantization noise) |
| Interface | SPI/SSI-compatible 3-wire serial - requires only CS/SHDN, DCLOCK, and DOUT; no external framing or protocol overhead |
Pinout & Package
ADS8320E/250G4 is housed in an 8-pin VSSOP package (3.00 mm × 3.00 mm body), optimized for space-constrained PCB layouts in portable instrumentation and isolated sensor nodes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VREF | Analog reference input | Accepts external reference from 0.5 V to VCC; sets full-scale analog input range and LSB weight (e.g., 76 µV/LSB at 5 V) |
| 2 - +In | Differential noninverting input | Accepts analog signal from –0.1 V to VCC + 0.1 V; sampled against –In during acquisition phase |
| 3 - –In | Differential inverting input | Fixed reference point (e.g., remote ground); limited to –0.1 V to +1 V; enables common-mode rejection of small ground shifts |
| 4 - GND | Analog/digital ground | Single ground plane required; internal analog and digital sections share this node-no split-ground design needed |
| 5 - CS/SHDN | Digital input (active-low chip select / shutdown) | LOW initiates conversion and enables DOUT; HIGH forces 3-µA shutdown mode-no external power switch required |
| 6 - DOUT | Digital output | Serial 16-bit straight-binary data, MSB-first; valid on falling DCLOCK edge; tri-states after LSB transmission |
| 7 - DCLOCK | Digital input | Asynchronous clock input (24 kHz–2.4 MHz); determines sampling rate and conversion timing; min. 200 ns high/low time |
| 8 - +VCC | Power supply | 2.7–5.25 V single supply powers analog core, reference buffer, and digital interface-no separate AVDD/DVDD rails |
Key Features
| Feature | Design Value |
|---|---|
| MicroPower operation | 1.8 mW at full 100-kHz rate (2.7 V) enables continuous logging in energy-harvested or battery-critical systems |
| Differential input architecture | +In/–In sampling captures true voltage difference without mid-cycle resampling-supports remote ground sensing in noisy industrial environments |
| Reference-flexible input range | VREF programmable from 0.5 V to VCC allows matching to sensor output range (e.g., 1.25 V thermocouple amplifier), maximizing SNR |
| Level-tolerant digital I/O | Digital inputs accept up to 5.5 V regardless of VCC-enables direct connection to 5-V microcontrollers while powering ADC at 3.3 V |
| No pipeline delay | Output data corresponds to conversion currently in progress-eliminates latency uncertainty in closed-loop control applications |
Applications
| Battery-Powered Remote DAQ | Isolated Sensor Interface |
|---|---|
|
Use Scenario: Wireless environmental monitoring node powered by AA batteries, acquiring temperature and humidity over 6 months. IC Role / Device Role / Timing Role: Primary ADC digitizing conditioned analog outputs from low-power sensors; triggered by microcontroller on scheduled intervals. Use Value: 1.8-mW active power and 3-µA shutdown current extend battery life; differential input rejects ground loop noise across long sensor cables. |
Use Scenario: Industrial pressure transducer mounted in high-voltage motor enclosure, transmitting data across isolation barrier. IC Role / Device Role / Timing Role: Signal-conditioning ADC located on field side of digital isolator; referenced to local sensor ground (–In). Use Value: –In pin accepts remote ground potential up to ±100 mV offset, eliminating measurement error from ground potential differences across isolation gap. |
| Multichannel Simultaneous Sampling | Portable Vibration Analyzer |
|
Use Scenario: 8-channel motor health monitor using multiple ADS8320E/250G4 devices sharing synchronous DCLOCK. IC Role / Device Role / Timing Role: Independent per-channel ADC with identical sampling instants enabled by shared clock and CS timing. Use Value: No inter-channel skew; each device completes conversion in exactly 16 clock cycles-enabling precise phase correlation of mechanical waveforms. |
Use Scenario: Handheld machine condition analyzer capturing 10-kHz accelerometer data for FFT-based fault detection. IC Role / Device Role / Timing Role: High-fidelity front-end ADC feeding DSP; configured for 10-kHz sampling with oversampling and averaging. Use Value: 90-dB SNR and <±0.5-LSB transition noise ensure accurate amplitude and harmonic content capture for bearing defect diagnosis. |
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 |
|---|---|---|---|
| ADS7816U | 16-bit, 100-kSPS, but single-ended input only; no –In pin; 8-pin SOIC (larger than VSSOP) | Lacks differential capability and remote ground sensing-unsuitable for isolated or noisy ground-referenced sensors | Select when cost-sensitive designs require single-ended inputs and board space permits SOIC package |
| ADS8322E/250 | Pin-compatible 16-bit SAR ADC with improved specs: ±0.006% INL (ADS8322EB), 92-dB SNR, lower noise (15 µVrms) | Higher performance grade; same footprint and interface-drop-in upgrade path where enhanced accuracy is required | Choose for new designs demanding tighter linearity or higher dynamic range without layout change |
Compared with ADS7816U, ADS8320E/250G4 provides essential differential input functionality for ground-noise rejection; compared with ADS8322E/250, it offers proven reliability and lower cost in applications where ±0.008% INL and 90-dB SNR meet system requirements.
Availability
ADS8320E/250G4 is available at Aetrix Electronics and suitable for battery-operated systems, remote data acquisition modules, and isolated sensor interfaces requiring stable component supply across extended production lifecycles.
Supply support for ADS8320E/250G4 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.
The ADS8320E/250G4 belongs to TI's precision data acquisition portfolio, designed specifically for low-power, high-resolution analog sensing in portable, remote, and isolated measurement systems.
FAQ
What is the guaranteed minimum sampling rate for ADS8320E/250G4?
The ADS8320E/250G4 supports a minimum sampling rate of 24 kHz (1-kHz throughput), determined by internal capacitor leakage limits. At lower rates, average power drops proportionally-for example, 0.3 mW at 10 kHz and 2.7 V-making it ideal for duty-cycled sensor nodes where conversions occur infrequently.
Does ADS8320E/250G4 require an external clock source?
Yes, ADS8320E/250G4 requires an external DCLOCK signal between 24 kHz and 2.4 MHz to control sampling timing and serial data transfer. The clock duty cycle is flexible (min. 200 ns high/low time at VCC ≥ 2.7 V), and no internal oscillator is provided-enabling precise synchronization across multiple ADCs in multichannel systems.
Can ADS8320E/250G4 operate with a 0.75-V reference voltage?
Yes, ADS8320E/250G4 supports VREF from 0.5 V to VCC. With a 0.75-V reference, full-scale input range becomes 0–0.75 V and LSB size is 11.5 µV. However, internal noise contributes ~11 LSB peak-to-peak error at this level, so system-level noise budgeting and averaging are recommended to maintain effective resolution.
What is the absolute maximum rating for analog input voltage on ADS8320E/250G4?
The absolute maximum analog input voltage for ADS8320E/250G4 is –0.1 V to VCC + 0.1 V on +In, and –0.1 V to +1 V on –In. Exceeding these ranges risks linearity degradation or latch-up. For example, with VCC = 3.3 V, +In must stay within –0.1 V to 3.4 V, and –In must remain between –0.1 V and +1 V-critical for remote ground sensing applications.
How does power-down mode function on ADS8320E/250G4?
ADS8320E/250G4 enters ultra-low-power shutdown mode when CS/SHDN is driven HIGH, drawing ≤3 µA. Conversion resumes within one clock cycle after CS/SHDN returns LOW-no wake-up delay or re-initialization required. This enables rapid burst-mode acquisition in energy-constrained systems without sacrificing responsiveness.
ADS8320E/250G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- microPOWER™
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 100k
- Number of Inputs:
- 1
- Input Type:
- Pseudo-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:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-VSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS8320E/250G4 FAQ
1.How can I place an order for ADS8320E/250G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8320E/250G4 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 ADS8320E/250G4 reliable?
The price and inventory of ADS8320E/250G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8320E/250G4 is usually 5 days.
3.What payment methods are accepted for ADS8320E/250G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8320E/250G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8320E/250G4?
ADS8320E/250G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8320E/250G4 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 ADS8320E/250G4?
For technical support, including ADS8320E/250G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8320E/250G4 requirements.
6.How does Aetrix verify that ADS8320E/250G4 is sourced from the original manufacturer or authorized distributors?
All ADS8320E/250G4 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 ADS8320E/250G4 meets industry standards.
7.What is the process for return or replacement of ADS8320E/250G4?
All ADS8320E/250G4 units undergo pre-shipment inspection (PSI). If there is an issue with ADS8320E/250G4, 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 ADS8320E/250G4 part is unused and in its original packaging.
Return procedure for ADS8320E/250G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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