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Texas Instruments ADS8320E/2K5G4
- Part No.:
- ADS8320E/2K5G4
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ADS8320E/2K5G4.pdf
- Description:
- IC ADC 16BIT SAR 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,471
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Product details
Overview
ADS8320E/2K5G4 from Texas Instruments is a 16-bit successive approximation register (SAR) analog-to-digital converter optimized for high-speed, low-power data acquisition. It delivers 100-kHz throughput with 1.8 mW power consumption at 2.7 V, features differential analog inputs (+In/–In), an external reference input (0.5 V to VCC), and SPI/SSI-compatible serial interface. It is used in battery-powered remote sensing nodes requiring precision, low quiescent current, and compact size.
For engineers reviewing the ADS8320E/2K5G4 datasheet, ADS8320E/2K5G4 pinout, ADS8320E/2K5G4 application, or ADS8320E/2K5G4 equivalent, key selection criteria include guaranteed 14-bit no-missing-codes performance, ±0.008% integral linearity error, 8-pin VSSOP package compatibility with ADS7816/ADS7822, and microPower operation down to 0.3 mW at 10 kHz - critical for portable instrumentation and isolated DAQ systems.
Technical Context
The ADS8320E/2K5G4 implements a capacitive redistribution SAR architecture with integrated sample-and-hold, enabling single-cycle acquisition and conversion without pipeline latency. Its internal CDAC and comparator operate synchronously with an external DCLOCK (24 kHz–2.4 MHz), and conversion result appears on DOUT MSB-first within 16 clock cycles after CS assertion.
It supports true differential input operation where –In serves as remote ground sense (not resampled mid-conversion), and accepts reference voltages from 0.5 V to VCC - directly scaling full-scale range and LSB weight (e.g., 76 µV/LSB at 5 V, 7.6 µV/LSB at 0.5 V). Power-down mode reduces supply current to ≤3 µA via CS/SHDN high assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - provides 65,536 discrete output codes for high dynamic range measurement. |
| Sampling Rate | 100 kHz - enables real-time capture of signals up to 50 kHz (Nyquist-limited) in continuous mode. |
| INL Error | ±0.008% FSR - ensures monotonicity and <±1 LSB linearity error over full temperature range (–40°C to +85°C). |
| Power Consumption | 1.8 mW at 100 kHz / 2.7 V - allows sustained operation in energy-constrained battery systems for >1 year on coin cell. |
| Reference Range | 0.5 V to VCC - permits flexible full-scale scaling (e.g., 0–2.5 V or 0–5 V) using internal or external references. |
| Package | 8-pin VSSOP (3.0 mm × 3.0 mm) - enables high-density PCB layout in space-constrained modules. |
| Interface | SPI/SSI-compatible 3-wire serial (CS/SHDN, DCLOCK, DOUT) - simplifies host MCU integration with minimal GPIO usage. |
Pinout & Package
ADS8320E/2K5G4 is housed in an 8-pin VSSOP (DGK) package with 0.65-mm lead pitch and exposed thermal pad (not electrically connected). The package supports standard reflow profiles and offers thermal resistance RθJA = 163.1°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: VREF | Analog reference input | Defines full-scale voltage range; must be stable and low-noise; draws 20–80 µA depending on sample rate. |
| 2: +In | Differential noninverting input | Accepts analog signal from 0.1 V below GND to VCC + 0.1 V; input capacitance = 45 pF. |
| 3: –In | Differential inverting input | Used for remote ground sensing; limited to –0.1 V to +0.5 V (2.7 V supply) or +1 V (5 V supply). |
| 4: GND | Analog/digital ground | Single ground plane required; separates analog and digital return paths only at star point. |
| 5: CS/SHDN | Digital input (active-low chip select / shutdown) | Pull HIGH to enter 3-µA shutdown; falling edge initiates conversion and serial data transfer. |
| 6: DOUT | Digital output | Serial MSB-first data stream; valid on falling DCLOCK edge; CMOS-level (0 V to VCC). |
| 7: DCLOCK | Digital input | External clock controlling conversion speed and data timing; min pulse width ≥200 ns. |
| 8: +VCC | Power supply | 2.7 V to 5.25 V operation; decoupling with 0.1 µF ceramic + 1–10 µF bulk capacitor required. |
Key Features
| Feature | Design Value |
|---|---|
| MicroPower operation | 1.8 mW at full 100-kHz rate (2.7 V); enables multi-year battery life in wireless sensor nodes. |
| No missing codes | Guaranteed 14-bit monotonicity (ADS8320E grade) - eliminates code ambiguities in closed-loop control. |
| Pin compatibility | Direct replacement for ADS7816 and ADS7822 - allows reuse of existing PCB layouts and firmware drivers. |
| Differential input architecture | +In/–In sampling occurs simultaneously; rejects common-mode noise from long sensor leads. |
| Flexible reference interface | Accepts reference from 0.5 V to VCC - supports low-voltage precision sensing (e.g., 0–2.5 V thermocouple outputs). |
Applications
| Battery-Powered Remote Sensing | Isolated Industrial Data Acquisition |
|---|---|
|
Use Scenario: Wireless environmental monitoring node powered by CR2032 battery, measuring temperature, humidity, and pressure over 2+ years. IC Role / Device Role / Timing Role: Primary ADC digitizing conditioned analog sensor outputs; synchronized to ultra-low-duty-cycle MCU wake-up events. Use Value: 0.3 mW power at 10 kHz sampling extends battery life beyond 24 months; 8-pin VSSOP minimizes board area. |
Use Scenario: DIN-rail mounted PLC module acquiring 4–20 mA current loop signals across galvanic isolation barrier. IC Role / Device Role / Timing Role: Isolated-side ADC converting analog inputs to digital for SPI transmission across transformer-coupled barrier. Use Value: Differential input rejects ground potential differences between field and control sides; 100-kHz rate supports fast loop updates. |
| Simultaneous Multi-Channel Sampling System | Vibration Analysis Front-End |
|
Use Scenario: 8-channel motor controller capturing phase currents and bus voltage with synchronized sampling. IC Role / Device Role / Timing Role: One ADS8320E/2K5G4 per channel, triggered by shared CS/SHDN and DCLOCK for deterministic timing alignment. Use Value: No pipeline delay ensures zero inter-channel skew; 16-bit resolution captures subtle current harmonics for FOC algorithms. |
Use Scenario: Portable handheld vibration analyzer measuring accelerometer outputs from rotating machinery. IC Role / Device Role / Timing Role: High-SNR ADC digitizing low-noise charge-amplified piezoelectric signals at 50 kHz effective bandwidth. Use Value: 90 dB SNR and –84 dB THD enable detection of sub-millig acceleration levels; microPower allows handheld operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-resolution, low-power SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7816IDGKR | 16-bit, 200-kSPS, but higher power (3.5 mW @ 5 V); no differential input; single-ended only. | Lacks differential rejection needed for noisy industrial environments; requires external op-amp for pseudo-differential use. | Select when cost sensitivity outweighs power and noise performance; verify input driver capability for single-ended sources. |
| ADS8322IPW | 16-bit, 100-kSPS, identical architecture and pinout; rated for extended temperature (–40°C to +105°C) and higher INL (±0.012% FSR). | Validated for automotive under-hood or industrial high-temp enclosures where ADS8320E/2K5G4's 85°C max is insufficient. | Choose for elevated ambient temperature operation; otherwise functionally interchangeable in existing designs. |
Compared with ADS7816IDGKR, ADS8320E/2K5G4 delivers superior noise immunity and lower system power via differential input and microPower design; compared with ADS8322IPW, it trades 20°C temperature margin for tighter INL and identical footprint - making it optimal for commercial-grade portable instrumentation.
Availability
ADS8320E/2K5G4 is available at Aetrix Electronics and suitable for battery-operated systems, remote data acquisition modules, and isolated industrial DAQ requiring stable component supply and long-term production continuity.
Supply support for ADS8320E/2K5G4 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 decades of leadership in precision data converters and industrial-grade ICs.
The ADS8320E/2K5G4 belongs to TI's precision SAR ADC product line, engineered for high-resolution, low-power, and small-footprint data acquisition in portable, remote, and isolated measurement systems.
FAQ
What is the guaranteed no-missing-codes resolution of ADS8320E/2K5G4?
The ADS8320E/2K5G4 guarantees no missing codes at 14 bits across its full operating temperature range (–40°C to +85°C). This specification is explicitly confirmed in the Electrical Characteristics tables for the ADS8320E grade under SYSTEM PERFORMANCE. While the device is 16-bit, monotonic behavior is assured down to 14 bits - critical for control loop stability and calibration accuracy in closed-loop systems using ADS8320E/2K5G4.
Does ADS8320E/2K5G4 support true differential input operation?
Yes, ADS8320E/2K5G4 supports true differential input: the voltage difference between +In and –In is sampled simultaneously onto the internal capacitor array and held during conversion. Unlike pseudo-differential architectures, –In is not resampled later in the cycle. However, –In is constrained to –0.1 V to +0.5 V (at 2.7 V supply) and functions best as a remote ground sense point rather than a full-range inverted signal input - a key design constraint verified in Section 7.3.1 of the ADS8320E/2K5G4 datasheet.
What is the minimum external reference voltage supported by ADS8320E/2K5G4?
The ADS8320E/2K5G4 supports an external reference voltage as low as 0.5 V, per Recommended Operating Conditions (Section 6.3). At 0.5 V reference, full-scale input range becomes 0 V to 0.5 V, and LSB weight drops to ~7.6 µV. Operation at this level requires careful attention to reference noise (<50 µV peak-to-peak), PCB layout, and bypassing - as confirmed in Section 7.3.2 and Figure 12 of the ADS8320E/2K5G4 datasheet.
Can ADS8320E/2K5G4 operate with a 3.3-V supply while interfacing to a 5-V microcontroller?
Yes, ADS8320E/2K5G4 supports mixed-voltage operation: its digital inputs (CS/SHDN, DCLOCK) tolerate logic-high levels up to 5.5 V regardless of VCC, allowing direct connection to 5-V MCU GPIOs. Its DOUT output swings 0 V to VCC (3.3 V), which is compatible with 5-V CMOS inputs (VIH threshold ≤3 V), though propagation delay may increase slightly - a behavior explicitly documented in Section 7.4.1 of the ADS8320E/2K5G4 datasheet.
Is ADS8320E/2K5G4 pin-compatible with ADS7822?
Yes, ADS8320E/2K5G4 is pin-compatible with ADS7822 in the same 8-pin VSSOP package, as stated in the Features section of the ADS8320E/2K5G4 datasheet. Both share identical pin numbering, functions, and electrical interface requirements (e.g., CS/SHDN active-low initiation, DOUT MSB-first timing). This allows drop-in replacement in legacy designs - provided the 16-bit resolution and 100-kHz rate of ADS8320E/2K5G4 meet system requirements.
ADS8320E/2K5G4 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/2K5G4 FAQ
1.How can I place an order for ADS8320E/2K5G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8320E/2K5G4 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/2K5G4 reliable?
The price and inventory of ADS8320E/2K5G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8320E/2K5G4 is usually 5 days.
3.What payment methods are accepted for ADS8320E/2K5G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8320E/2K5G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8320E/2K5G4?
ADS8320E/2K5G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8320E/2K5G4 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/2K5G4?
For technical support, including ADS8320E/2K5G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8320E/2K5G4 requirements.
6.How does Aetrix verify that ADS8320E/2K5G4 is sourced from the original manufacturer or authorized distributors?
All ADS8320E/2K5G4 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/2K5G4 meets industry standards.
7.What is the process for return or replacement of ADS8320E/2K5G4?
All ADS8320E/2K5G4 units undergo pre-shipment inspection (PSI). If there is an issue with ADS8320E/2K5G4, 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/2K5G4 part is unused and in its original packaging.
Return procedure for ADS8320E/2K5G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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