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Texas Instruments ADS8344E
- Part No.:
- ADS8344E
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
ADS8344E.pdf
- Description:
- IC ADC 16BIT SAR 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:454
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Product details
Overview
ADS8344E from Texas Instruments is a 16-bit, 8-channel SAR analog-to-digital converter with synchronous serial interface, ±0.05% gain error, 100kHz throughput rate, and QSOP-20 package. It operates from a single 2.7V–5V supply, supports single-ended or differential input configurations, and delivers 84dB SINAD - ideal for precision data acquisition in battery-powered test equipment.
For engineers reviewing the ADS8344E datasheet, ADS8344E pinout, ADS8344E application, or ADS8344E equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative options, and supply-ready procurement guidance - all grounded in TI SBAS139E production data.
Technical Context
The ADS8344E implements a capacitive redistribution SAR architecture with integrated sample-and-hold, enabling precise 16-bit conversion without external hold circuitry. Its 8-channel analog multiplexer supports both single-ended (8 channels referenced to COM) and true differential (4 channel pairs) modes, selected via A2–A0 and SGL/DIF bits in the 24-bit control byte.
Digital operation uses a 4-wire CMOS-compatible serial interface (CS, DCLK, DIN, DOUT) with BUSY signaling. Conversion timing depends on clock mode: external clock (24 DCLK cycles per conversion, fDCLK = 24 × fSAMPLE) or internal clock (8µs max conversion time, DCLK only for data readout).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 discrete output codes for high-fidelity signal digitization. |
| Throughput Rate | 100 kHz - enables real-time sampling of fast transients in industrial monitoring systems. |
| SINAD | 84 dB - ensures ≥13.6 effective bits at 10kHz input, critical for dynamic range in measurement gear. |
| Gain Error | ±0.05% - limits full-scale accuracy drift to ≤32.8 LSB at 5V reference, supporting calibrated sensor interfaces. |
| Supply Range | 2.7 V to 5 V - allows direct integration into 3.3V or 5V microcontroller systems without level-shifting. |
| Power Dissipation | 10 mW at 5V/100kHz - enables multi-channel logging in portable PDAs with thermal headroom. |
| Operating Temp | –40°C to +85°C - qualified for deployment in uncontrolled industrial environments and field instrumentation. |
Pinout & Package
ADS8344E is housed in a 20-pin QSOP (DBQ) package with 0.65 mm pitch and 7.2 mm × 4.4 mm footprint - compatible with standard surface-mount reflow processes and space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 | Analog Input Channels | Eight single-ended inputs; configurable as four differential pairs (e.g., CH0/CH4) via SGL/DIF control bit. |
| COM | Analog Ground Reference | Sets zero-code voltage in single-ended mode; must be connected to system ground or stable reference point. |
| SHDN | Shutdown Control | Active-low input reducing power to <15 µW - essential for duty-cycled battery operation. |
| VREF | External Reference Input | Accepts 0.5 V to VCC; defines full-scale input span (0 V to VREF) and directly scales LSB size (e.g., 76 µV at 5 V). |
| +VCC (Pins 12, 20) | Power Supply | Dual power pins reduce IR drop and improve PSRR; supports 2.7–5 V operation with 1.5–2.0 mA quiescent current. |
| GND (Pins 13, 14) | Analog/Digital Ground | Separate ground pins minimize noise coupling between analog front-end and digital interface sections. |
| CS | Chip Select | Active-low enable for serial interface; places DOUT and BUSY in high-impedance state when deasserted. |
| DIN / DOUT | Serial Data I/O | CMOS-compatible bidirectional data path; DOUT outputs MSB-first straight-binary code on falling DCLK edge. |
| BUSY | Conversion Status Flag | Active-low open-drain output indicating acquisition/conversion in progress - used for hardware handshaking. |
| DCLK | Serial Clock Input | Drives data transfer and (in external mode) controls SAR bit decisions; supports up to 2.4 MHz clock rate. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip 8-channel multiplexer | Reduces external component count and board area in multi-sensor systems - eliminates need for external analog switches. |
| Configurable input topology | Single-ended (8 ch) or differential (4 ch) selection via software-controlled SGL/DIF bit - adapts to diverse sensor output types. |
| Internal sample-and-hold | Capacitive SAR architecture inherently samples and holds input during conversion - no external SH circuit required. |
| Two clock operation modes | External clock (deterministic timing) or internal clock (processor-friendly, decouples conversion from bus speed) - increases system flexibility. |
| Low-power shutdown | Reduces supply current to <3 µA in auto power-down mode (PD1=PD0=0), extending battery life in portable data loggers. |
Applications
| Data Acquisition Systems | Test & Measurement Equipment |
|---|---|
Use Scenario: Multi-channel voltage logging in environmental sensor nodes with thermocouples, RTDs, and strain gauges. IC Role / Device Role / Timing Role: Primary ADC capturing synchronized analog inputs across 8 channels with 16-bit resolution and 100kHz aggregate rate. Use Value: Enables simultaneous high-accuracy readings without multiplexing delay penalties - improves temporal correlation of sensor data. |
Use Scenario: Portable oscilloscope front-end digitizing analog waveforms up to 50kHz bandwidth. IC Role / Device Role / Timing Role: High-SINAD ADC providing clean 16-bit samples for FFT-based spectral analysis and waveform reconstruction. Use Value: 84dB SINAD and 92dB SFDR support accurate harmonic distortion measurements in benchtop analyzers. |
| Industrial Process Control | Battery-Powered Systems |
Use Scenario: PLC analog input module monitoring pressure, flow, and temperature signals in factory automation. IC Role / Device Role / Timing Role: Isolated ADC interfacing with 4–20mA transmitters via precision resistor networks and VREF scaling. Use Value: ±0.05% gain error and –40°C to +85°C rating ensure long-term calibration stability in harsh plant-floor conditions. |
Use Scenario: Personal digital assistant (PDA) acquiring biometric signals (ECG, pulse oximetry) from low-noise front-ends. IC Role / Device Role / Timing Role: Low-voltage ADC operating from 3.3V rail with shutdown mode activated between touch-screen polling intervals. Use Value: 5mW typical power at 3.3V/100kHz and <15µW shutdown current maximize runtime on coin-cell or Li-ion batteries. |
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 |
|---|---|---|---|
| ADS8345IPW | Same 16-bit SAR core but 4-channel (not 8-channel); identical QSOP-20 package and pinout except missing CH4–CH7 pins. | Lower channel count reduces PCB routing complexity in compact designs where only 4 inputs are needed. | Select ADS8345IPW when system requires fewer analog inputs and board space is constrained - no layout change needed due to shared pinout subset. |
| ADS8325IDRCT | 16-bit, 1-MSPS SAR ADC in 10-pin VSSOP; lacks on-chip multiplexer - requires external analog switching for multi-channel use. | Higher speed suits real-time control loops; absence of mux shifts channel selection responsibility to MCU firmware or external IC. | Choose ADS8325IDRCT when throughput >100kHz is mandatory and external multiplexing is acceptable - trade channel integration for speed. |
Compared with ADS8344E, ADS8345IPW offers identical performance in a reduced-channel form factor with mechanical pin compatibility, while ADS8325IDRCT trades integrated multiplexing and lower power for higher sampling speed - making ADS8344E optimal for balanced multi-channel, low-power, precision applications.
Availability
ADS8344E is available at Aetrix Electronics and suitable for data acquisition systems, industrial process control modules, and battery-powered portable instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADS8344E 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 IC design.
The ADS8344E belongs to TI's precision SAR ADC product line, engineered for high-resolution, low-power, multi-channel signal acquisition in portable and ruggedized measurement applications.
FAQ
What is the maximum recommended reference voltage for ADS8344E?
The ADS8344E accepts an external reference voltage (VREF) from 0.5 V up to +VCC. At +VCC = 5 V, the maximum VREF is 5 V; at +VCC = 2.7 V, it is 2.7 V. Exceeding VREF > +VCC violates absolute maximum ratings and risks damage. The reference directly sets full-scale input range (0 V to VREF), so proper scaling is required for sensor signal conditioning.
Does ADS8344E support true differential input mode?
Yes, ADS8344E supports true differential input using four channel pairs (e.g., CH0/CH4, CH1/CH5) selected via the SGL/DIF control bit and A2–A0 address bits. In differential mode, the device measures the voltage difference between two inputs, rejecting common-mode noise - confirmed in Tables I and II of TI SBAS139E.
What is the minimum acquisition time required for ADS8344E at 5V supply?
The minimum acquisition time (tACQ) for ADS8344E is 1.7 µs when operating at +VCC = 5 V, as specified in Table VII of SBAS139E. This timing ensures the internal sampling capacitor fully charges before conversion begins - violating this spec risks missing codes or degraded INL performance.
Can ADS8344E operate from a 3.3V supply while maintaining full 16-bit performance?
Yes, ADS8344E is fully specified at +VCC = 3.3 V (within its 2.7–5 V range). Electrical characteristics including 16-bit resolution, ±0.05% gain error, 100 kHz throughput, and 84 dB SINAD are guaranteed across –40°C to +85°C at 3.3 V - per SBAS139E Section "ELECTRICAL CHARACTERISTICS: +2.7V".
How does the SHDN pin function in ADS8344E?
The SHDN pin on ADS8344E is an active-low shutdown control. When pulled LOW, it places the device in ultra-low-power mode (<15 µW), disabling the internal reference buffer and SAR logic. When returned HIGH, the device resumes normal operation with no wake-up delay - enabling rapid duty-cycled operation in battery-powered ADS8344E systems.
ADS8344E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-SSOP (0.154", 3.90mm 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:
- -
ADS8344E FAQ
1.How can I place an order for ADS8344E through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8344E 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 ADS8344E reliable?
The price and inventory of ADS8344E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8344E is usually 5 days.
3.What payment methods are accepted for ADS8344E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8344E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8344E?
ADS8344E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8344E 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 ADS8344E?
For technical support, including ADS8344E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8344E requirements.
6.How does Aetrix verify that ADS8344E is sourced from the original manufacturer or authorized distributors?
All ADS8344E 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 ADS8344E meets industry standards.
7.What is the process for return or replacement of ADS8344E?
All ADS8344E units undergo pre-shipment inspection (PSI). If there is an issue with ADS8344E, 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 ADS8344E part is unused and in its original packaging.
Return procedure for ADS8344E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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