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Texas Instruments ADS8324EB/2K5
- Part No.:
- ADS8324EB/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ADS8324EB/2K5.pdf
- Description:
- IC ADC 14BIT SAR 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,118
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Product details
Overview
ADS8324EB/2K5 from Texas Instruments is a 14-bit, 50kHz sampling SAR analog-to-digital converter operating at 1.8V with differential bipolar input, SPI/SSI-compatible serial interface, and ultra-low power consumption (2.5mW at 1.8V, 3μA shutdown). It features ±2 LSB integral linearity error, MSOP-8 package, and supports isolated data acquisition in battery-powered sensor nodes.
For engineers reviewing the ADS8324EB/2K5 datasheet, ADS8324EB/2K5 pinout, ADS8324EB/2K5 application, or ADS8324EB/2K5 equivalent, key selection criteria include its 1.8V micro-power operation, differential input range referenced to VREF (0.5V to VCC/2), 16-cycle conversion time, binary two's complement output format, and compatibility with low-noise precision signal chains requiring <1mW average power at 10kHz throughput.
Technical Context
The ADS8324EB/2K5 implements a capacitive redistribution SAR architecture fabricated in 0.6μm CMOS, integrating sample-and-hold functionality. Its analog front-end accepts fully differential inputs with common-mode range dependent on VREF, and supports single-ended operation with fixed –In bias.
Digital communication uses a synchronous 3-wire SPI/SSI interface: CS/SHDN initiates conversion and controls tri-state output, DCLOCK synchronizes bit transfer (rising-edge capture typical), and DOUT outputs 16-bit data (MSB first) including two trailing zero dummy bits. Conversion completes in 16 clock cycles with 4.5-cycle acquisition window.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit - delivers 16,384 discrete output codes for high-precision measurement |
| Sampling Rate | 50 kHz - enables real-time monitoring of signals up to 25 kHz (Nyquist) |
| Supply Voltage | 1.8 V - enables direct integration into low-voltage battery systems without level-shifting |
| Integral Linearity Error | ±2 LSB - ensures monotonicity and <0.012% full-scale error for calibration-sensitive applications |
| Power Dissipation | 2.5 mW at 1.8 V - allows continuous 50 kHz operation in thermally constrained portable designs |
| Shutdown Current | 3 μA max - reduces system standby power when idle between acquisition bursts |
| Reference Range | 0.5 V to VCC/2 - permits flexible scaling of input range while maintaining 14-bit resolution |
Pinout & Package
ADS8324EB/2K5 is housed in an MSOP-8 (VSSOP DGK) package, 3.0 mm × 3.0 mm × 1.0 mm, with exposed pad for thermal enhancement and RoHS-compliant lead finish. Pin numbering follows standard top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREF | Reference Input | Sets full-scale input span (±VREF); must be stable, low-noise, and bypassed with 0.1 μF ceramic capacitor |
| +In | Non-Inverting Analog Input | Differential input node; accepts voltage within –0.1 V to VCC + 0.1 V; requires matched source impedance to –In |
| –In | Inverting Analog Input | Differential input node; common-mode range shifts with VREF; must stay within 0.8 V to 1.0 V at 1.8 V supply |
| GND | Analog Ground | Primary return path for analog circuitry; requires dedicated low-impedance connection to clean analog ground plane |
| CS/SHDN | Chip Select / Shutdown Control | Active-low conversion trigger; HIGH forces full digital/analog shutdown (3 μA mode) |
| DOUT | Serial Data Output | CMOS-level output (0 V to VCC); delivers 16-bit two's complement code MSB-first after fifth DCLOCK falling edge |
| DCLOCK | Data Clock Input | Asynchronous master clock (24 kHz–1.2 MHz); defines conversion speed and serial timing; min. 200 ns high/low pulse width |
| +VCC | Power Supply | 1.8 V nominal supply; requires local 0.1 μF ceramic bypass placed adjacent to pin; supports 1.8 V–3.6 V operation |
Key Features
| Feature | Design Value |
|---|---|
| Bipolar differential input | Enables true zero-centered measurement (±VREF range) without external op-amp level-shifting |
| 1.8 V micro-power operation | Reduces system-level power budget in coin-cell or energy-harvesting applications where >90% duty cycle is idle |
| 16-cycle deterministic conversion | Guarantees predictable latency (e.g., 320 ns at 50 MHz clock) for time-critical closed-loop control |
| SPI/SSI-compatible serial interface | Integrates directly with TI C2000, STM32, and other MCUs using standard hardware SPI peripherals-no custom logic required |
| MSOP-8 footprint | Provides compact layout (3×3 mm) compatible with space-constrained PCBs while enabling manual rework and optical inspection |
Applications
| Portable Battery Monitoring | Isolated Industrial Sensor Node |
|---|---|
Use Scenario: Measuring cell voltage and temperature in multi-cell Li-ion packs with galvanic isolation. IC Role / Device Role / Timing Role: ADC front-end digitizing isolated analog signals; synchronized via optocoupled DCLOCK and CS lines. Use Value: 14-bit resolution captures <1 mV changes across 0–4.2 V range; 2.5 mW dissipation extends runtime between charges. |
Use Scenario: Remote vibration sensing on rotating machinery using isolated current-loop transmitters. IC Role / Device Role / Timing Role: High-fidelity analog digitization before isolation barrier; operates from local 1.8 V LDO post-isolation. Use Value: Differential input rejects common-mode noise induced by motor EMI; ±2 LSB INL maintains calibration integrity over temperature. |
| Multi-Channel Simultaneous Sampling System | Low-Power Precision Data Logger |
Use Scenario: Synchronized acquisition across 8+ channels in structural health monitoring using time-aligned CS triggers. IC Role / Device Role / Timing Role: Channel-specific ADC with deterministic 16-cycle conversion enabling sub-microsecond inter-channel skew. Use Value: Pin-compatible upgrade from ADS7817 allows migration to 14-bit resolution without PCB redesign; MSOP-8 eases dense channel layout. |
Use Scenario: Environmental sensor node logging temperature, humidity, and pressure at 10 Hz using solar harvesting. IC Role / Device Role / Timing Role: Low-duty-cycle ADC activated only during measurement bursts; spends >99% time in 3 μA shutdown mode. Use Value: Average power <1 mW at 10 kHz sampling enables years of operation on small supercapacitors; 0.5 V reference support enables ultra-low-voltage operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 14-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8325EB/2K5 | 16-bit resolution, same 50 kHz rate, identical MSOP-8 pinout, but higher 4.5 mW power at 1.8 V | Used where ENOB >13.5 bits required for spectral analysis; not suitable for strict <3 mW budgets | Select ADS8325EB/2K5 only if additional 2 bits of resolution justify 80% higher active power and larger reference buffer requirements. |
| ADS7817E/2K5 | 12-bit resolution, 100 kHz rate, same MSOP-8 package and SPI interface, but ±1 LSB INL and 1.8 V–5.25 V supply range | Preferred for cost-sensitive, lower-accuracy industrial I/O modules needing wider supply flexibility | Choose ADS7817E/2K5 when 12-bit accuracy suffices and board space allows reuse of existing 12-bit firmware and layout. |
Compared with ADS8325EB/2K5, ADS8324EB/2K5 trades 2 bits of resolution for 44% lower active power and tighter thermal profile; versus ADS7817E/2K5, it delivers 4× finer quantization at half the sampling rate, making it optimal for precision over speed in energy-constrained systems.
Availability
ADS8324EB/2K5 is available at Aetrix Electronics and suitable for portable battery monitoring, isolated industrial sensor nodes, multi-channel simultaneous sampling systems, and low-power precision data loggers requiring stable component supply throughout extended production lifecycles.
Supply support for ADS8324EB/2K5 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 low-power design.
The ADS8324EB/2K5 belongs to TI's precision SAR ADC product line, engineered for high-resolution, low-power signal acquisition in portable, isolated, and multi-channel measurement systems where accuracy, size, and energy efficiency are critical.
FAQ
What is the maximum sampling rate supported by the ADS8324EB/2K5?
The ADS8324EB/2K5 supports a maximum sampling rate of 50 kHz under specified conditions (VCC = 1.8 V, fCLK = 1.2 MHz). This rate is limited by its 16-clock-cycle conversion time and minimum DCLOCK period. At lower supply voltages or elevated temperatures, the achievable rate may decrease slightly due to timing margin reduction.
Does the ADS8324EB/2K5 require an external reference voltage?
Yes, the ADS8324EB/2K5 requires an external reference voltage applied to the VREF pin. It operates with VREF between 0.5 V and VCC/2 (0.9 V at 1.8 V supply). The reference directly sets the full-scale input range (±VREF), and its stability and noise performance directly impact ADC accuracy and effective number of bits.
What is the meaning of "EB" in ADS8324EB/2K5?
The "EB" suffix in ADS8324EB/2K5 denotes the enhanced performance grade: ±2 LSB integral linearity error (vs ±3 LSB for the "E" grade), confirmed across the full –40°C to +85°C temperature range. This grade is validated per TI's production test flow and marked as "A24" on the device body and reel packaging.
Can the ADS8324EB/2K5 interface directly with a 3.3 V microcontroller SPI port?
No-ADS8324EB/2K5's DOUT output swings from 0 V to VCC (1.8 V), so connecting directly to a 3.3 V MCU SPI input risks violating the MCU's VIH specification. A level-shifter or 1.8 V–tolerant MCU GPIO is required. TI recommends using the ADS8324EB/2K5 with 1.8 V–compatible controllers like MSP430FRxx or selected STM32L4 variants.
How does the power-down mode function on the ADS8324EB/2K5?
The ADS8324EB/2K5 enters full power-down mode when CS/SHDN is driven HIGH, reducing supply current to ≤3 μA. During normal conversion, it automatically powers down analog circuitry between conversions. Maintaining CS HIGH between acquisitions minimizes average power-critical for battery life in intermittent-sampling applications.
ADS8324EB/2K5 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:
- Active
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 50k
- 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:
- 1.8V ~ 3.6V
- Voltage - Supply, Digital:
- 1.8V ~ 3.6V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-VSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS8324EB/2K5 FAQ
1.How can I place an order for ADS8324EB/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8324EB/2K5 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 ADS8324EB/2K5 reliable?
The price and inventory of ADS8324EB/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8324EB/2K5 is usually 5 days.
3.What payment methods are accepted for ADS8324EB/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8324EB/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8324EB/2K5?
ADS8324EB/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8324EB/2K5 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 ADS8324EB/2K5?
For technical support, including ADS8324EB/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8324EB/2K5 requirements.
6.How does Aetrix verify that ADS8324EB/2K5 is sourced from the original manufacturer or authorized distributors?
All ADS8324EB/2K5 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 ADS8324EB/2K5 meets industry standards.
7.What is the process for return or replacement of ADS8324EB/2K5?
All ADS8324EB/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with ADS8324EB/2K5, 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 ADS8324EB/2K5 part is unused and in its original packaging.
Return procedure for ADS8324EB/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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