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Texas Instruments ADS8344N
- Part No.:
- ADS8344N
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
ADS8344N.pdf
- Description:
- IC ADC 16BIT SAR 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:697
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Product details
Overview
ADS8344N from Texas Instruments is a 16-bit, 8-channel SAR analog-to-digital converter with serial interface, single-supply operation (2.7V–5V), up to 100kHz throughput, and 84dB SINAD. It integrates an on-chip 8-channel multiplexer and supports both single-ended (8-channel) and differential (4-channel) input configurations. It is used in portable data acquisition systems requiring low power and high resolution.
For engineers reviewing the ADS8344N datasheet, ADS8344N pinout, ADS8344N application, or ADS8344N equivalent, this page delivers verified technical context, package-specific pin functions, real-world use cases, and validated alternative options for industrial and battery-powered measurement designs.
Technical Context
The ADS8344N implements a capacitive redistribution SAR architecture with integrated sample-and-hold, operating from a single 2.7V–5V supply. Its analog front-end uses an 8-channel multiplexer configurable via serial control bits (A2–A0 and SGL/DIF) for either single-ended or differential input modes.
Digital communication occurs over a 4-wire CMOS-compatible serial interface (CS, DCLK, DIN, DOUT) with BUSY signaling. Conversion timing supports both external clock mode (fDCLK = 24 × fSAMPLE) and internal clock mode, enabling flexible microprocessor interfacing without strict timing constraints on the host controller.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 discrete output codes for high-precision voltage digitization. |
| Throughput Rate | 100 kHz - enables real-time sampling of fast transients in test equipment and process monitoring. |
| SINAD | 84 dB at 10 kHz - ensures ≥13.6 effective number of bits (ENOB) for accurate signal reconstruction. |
| Input Configuration | 8-channel single-ended or 4-channel differential - simplifies multi-sensor interfacing without external mux or instrumentation amps. |
| Reference Range | 0.5 V to VCC - allows scalable full-scale input range (e.g., 0–2.5 V or 0–5 V) while maintaining LSB weight proportionality. |
| Power Dissipation | 5 mW at 100 kHz / +2.7 V - supports extended runtime in battery-powered PDAs and handheld loggers. |
| Operating Temp | –40°C to +85°C - qualified for industrial environments including factory automation and remote sensing nodes. |
Pinout & Package
ADS8344N is packaged in SSOP-20 (Package Drawing DB), a 0.65 mm pitch, surface-mount, 20-pin small outline package suitable for compact PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 | Analog input channels | Eight dedicated analog inputs; selected via A2–A0 and SGL/DIF control bits for single-ended or differential acquisition. |
| COM | Analog ground reference | Sets zero-code voltage in single-ended mode; connects to system ground or isolated reference point. |
| SHDN | Shutdown control | Active-low input that reduces supply current to ≤3 µA, enabling ultra-low-power sleep between measurements. |
| VREF | External reference input | Unbuffered input accepting 0.5 V to VCC; directly sets full-scale range and LSB weight (e.g., 76 µV/LSB at 5 V). |
| +VCC (Pins 12 & 20) | Power supply | Dual power pins reduce IR drop and improve PSRR; supports 2.7 V–5 V operation with 1.2–2.0 mA quiescent current. |
| GND (Pins 13 & 14) | Analog/digital ground | Separate ground pins minimize noise coupling between analog and digital sections; must be tied at single point. |
| DIN / DOUT | Serial data I/O | CMOS-compatible bidirectional serial interface; DOUT is tri-stated when CS is high for clean bus sharing. |
| CS / DCLK / BUSY | Control and status signals | Chip-select synchronizes transfers; DCLK clocks data; BUSY indicates conversion or control-byte latching state. |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply operation | 2.7 V–5 V supply eliminates need for dual-rail or charge-pump circuitry in portable systems. |
| Configurable input topology | Software-selectable single-ended (8 ch) or differential (4 ch) mode via serial command-no hardware changes required. |
| Internal clock mode | On-chip conversion clock relieves host MCU of precise timing generation; enables asynchronous readout at ≤2 MHz. |
| Low-power shutdown | ≤3 µA shutdown current extends battery life in intermittent-sampling applications like environmental monitors. |
| Channel-to-channel isolation | 100 dB at 10 kHz prevents crosstalk between adjacent channels during simultaneous multi-sensor acquisition. |
Applications
| Data Acquisition Systems | Test & Measurement Equipment |
|---|---|
|
Use Scenario: Multi-channel voltage logging in field-deployable environmental sensor nodes with solar/battery power. IC Role / Device Role / Timing Role: Primary ADC capturing analog outputs from temperature, humidity, and pressure sensors at 10–100 Hz rates. Use Value: 16-bit resolution and 84 dB SINAD ensure sub-millivolt accuracy across 8 inputs, while 5 mW power enables >1-year battery life. |
Use Scenario: Portable oscilloscope front-end digitizing ±5 V signals with DC coupling and variable gain stages. IC Role / Device Role / Timing Role: High-fidelity sampling engine supporting 100 kHz real-time capture and post-processing in embedded ARM-based instruments. Use Value: Differential input mode rejects common-mode noise from probe grounds; 100 dB channel isolation preserves signal integrity across multiple channels. |
| Industrial Process Control | Battery-Powered Systems |
|
Use Scenario: PLC analog input module acquiring 4–20 mA loop signals from flow meters and valve positioners. IC Role / Device Role / Timing Role: Precision ADC converting conditioned current-loop voltages with programmable gain and offset calibration. Use Value: ±0.05% gain error and –40°C to +85°C rating ensure stable performance in unconditioned factory environments. |
Use Scenario: Personal digital assistant (PDA) measuring touchscreen coordinates, battery voltage, and ambient light. IC Role / Device Role / Timing Role: Integrated multi-function ADC reducing BOM count by replacing discrete converters for each subsystem. Use Value: Single 2.7 V supply and <3 µA shutdown current maximize runtime; serial interface minimizes GPIO usage on resource-constrained SoCs. |
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 |
|---|---|---|---|
| ADS8344EB | Enhanced grade: ±0.024% gain error (vs. ±0.05%), 6 LSB integral linearity (vs. 8 LSB), QSOP-20 only. | Targeted at metrology-grade instruments where gain drift and INL must be minimized over temperature. | Select ADS8344EB when absolute accuracy and long-term stability outweigh cost and package flexibility. |
| ADS8325 | 5 V-only supply (4.75–5.25 V), no 2.7 V operation; 1 MSPS throughput; SPI-compatible but no internal clock mode. | Used in high-speed control loops (e.g., motor phase current sensing) where speed matters more than low-voltage operation. | Choose ADS8325 only if system operates strictly at 5 V and requires >100 kHz sampling with minimal latency. |
Compared with ADS8344EB, the ADS8344N trades minor accuracy for broader supply range and SSOP-20 availability; compared with ADS8325, it sacrifices speed for true single-supply versatility and internal clock convenience in resource-limited embedded hosts.
Availability
ADS8344N is available at Aetrix Electronics and suitable for data acquisition, industrial process control, and battery-powered systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ADS8344N 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-grade ICs.
The ADS8344N belongs to TI's precision SAR ADC product line, designed specifically for portable and multi-channel measurement applications demanding resolution, low power, and flexible input configuration without external support components.
FAQ
What is the maximum sampling rate supported by the ADS8344N?
The ADS8344N supports a maximum throughput rate of 100 kHz under specified conditions (e.g., +2.7 V or +5 V supply, fDCLK = 2.4 MHz). This rate is achieved using the external clock mode with 24 clock cycles per conversion. At lower clock frequencies or in internal clock mode, the effective sampling rate decreases accordingly, but the device maintains full 16-bit accuracy across its entire operational range.
Does the ADS8344N require an external reference voltage?
Yes, the ADS8344N requires an external reference voltage applied to the VREF pin. It accepts any stable voltage from 0.5 V to VCC, which directly defines the full-scale input range (e.g., 0–VREF for single-ended mode). The reference is unbuffered and draws current proportional to conversion rate and VREF level-typically 13 µA at 2.5 V and 100 kHz-so a low-noise, well-bypassed reference source is essential for optimal performance.
Can the ADS8344N operate from a 3.3 V supply?
Yes, the ADS8344N is fully specified for operation from 2.7 V to 5 V, including standard 3.3 V systems. Electrical characteristics-including 100 kHz throughput, 84 dB SINAD, and ±0.05% gain error-are guaranteed across this range. At +3.3 V, typical power dissipation drops to ~3.5 mW at 100 kHz, making it ideal for mixed-signal FPGA or microcontroller interfaces powered from 3.3 V rails.
How does the ADS8344N handle differential input configurations?
The ADS8344N supports true 4-channel differential input via software-configurable control bits (SGL/DIF = LOW and A2–A0). In this mode, pairs such as CH0/CH4, CH1/CH5, CH2/CH6, and CH3/CH7 form differential inputs referenced to COM. The device provides 100 dB channel-to-channel isolation and maintains 84 dB SINAD, enabling noise-rejecting measurements in electrically noisy industrial settings without external instrumentation amplifiers.
What package options are available for the ADS8344N?
The ADS8344N is exclusively offered in the SSOP-20 (Package Drawing DB) package-a 7.2 mm × 5.3 mm, 0.65 mm pitch surface-mount variant. Unlike the pin-compatible ADS8344E (QSOP-20), the ADS8344N is not available in QSOP. Its SSOP footprint supports high-density layouts and is compatible with standard reflow profiles, making it suitable for automated manufacturing of compact industrial and portable electronics.
ADS8344N Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 100k
- Number of Inputs:
- 4, 8
- 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:
- 2.7V ~ 3.6V, 5V
- Voltage - Supply, Digital:
- 2.7V ~ 3.6V, 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 20-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS8344N FAQ
1.How can I place an order for ADS8344N through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8344N 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 ADS8344N reliable?
The price and inventory of ADS8344N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8344N is usually 5 days.
3.What payment methods are accepted for ADS8344N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8344N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8344N?
ADS8344N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8344N 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 ADS8344N?
For technical support, including ADS8344N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8344N requirements.
6.How does Aetrix verify that ADS8344N is sourced from the original manufacturer or authorized distributors?
All ADS8344N 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 ADS8344N meets industry standards.
7.What is the process for return or replacement of ADS8344N?
All ADS8344N units undergo pre-shipment inspection (PSI). If there is an issue with ADS8344N, 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 ADS8344N part is unused and in its original packaging.
Return procedure for ADS8344N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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