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Texas Instruments ADS8344E/2K5
- Part No.:
- ADS8344E/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
ADS8344E/2K5.pdf
- Description:
- IC ADC 16BIT SAR 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:466
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Product details
Overview
ADS8344E/2K5 from Texas Instruments is a 16-bit, 8-channel SAR analog-to-digital converter with synchronous serial interface, single-supply operation (2.7V–5V), and up to 100kHz throughput. It features an on-chip 8-channel multiplexer, 84dB SINAD at 10kHz, and supports both single-ended (8-channel) and differential (4-channel) input configurations. It is used in portable data acquisition systems where low power, precision, and channel flexibility are critical.
For engineers reviewing the ADS8344E/2K5 datasheet, ADS8344E/2K5 pinout, ADS8344E/2K5 application, or ADS8344E/2K5 equivalent, key selection considerations include its QSOP-20 package, 16-bit resolution with ±0.05% gain error, shutdown mode (<15µW), and compatibility with microprocessor-based serial interfaces requiring minimal isolation overhead.
Technical Context
The ADS8344E/2K5 implements a capacitive redistribution SAR architecture with integrated sample-and-hold, enabling true 16-bit linearity without external hold circuitry. Its analog front-end supports reconfigurable input topology via SGL/DIF and A2–A0 control bits, allowing dynamic selection between eight single-ended or four differential input pairs referenced to COM.
Digital operation is governed by a 24-bit control/data frame over a four-wire CMOS-compatible serial interface (CS, DCLK, DIN, DOUT), with BUSY signaling conversion status. Clocking supports both external (up to 2.4MHz) and internal modes, and power-down is controlled via PD1/PD0 bits or SHDN pin, enabling sub-µA quiescent current between conversions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 discrete output codes for high-fidelity signal digitization |
| Throughput Rate | 100kHz - enables real-time sampling of signals up to ~40kHz Nyquist bandwidth |
| SINAD | 84dB at 10kHz - ensures >13.6 effective bits for precision measurement applications |
| Gain Error | ±0.05% of FSR - limits full-scale calibration drift to <33 LSBs with 5V reference |
| Supply Range | 2.7V to 5V - supports direct integration into battery-powered (3.3V/5V) and industrial rails |
| Power Dissipation | 10mW at 5V/100kHz - enables thermally constrained PCB layouts in handheld instruments |
| Operating Temp | –40°C to +85°C - qualified for industrial and extended-temperature embedded deployment |
Pinout & Package
ADS8344E/2K5 is packaged in a 20-pin QSOP (DBQ) with 0.65mm pitch, optimized for compact, high-density PCB layouts while maintaining manufacturability and thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 | Analog Input Channels | Eight configurable inputs supporting single-ended or differential pairing per control byte |
| COM | Analog Ground Reference | Sets zero-code voltage in single-ended mode; common-mode reference for differential inputs |
| SHDN | Hardware Shutdown Control | Active-low pin reducing supply current to <15µW when asserted, independent of SPI state |
| VREF | External Reference Input | Unbuffered 0.5V–VCC reference input directly driving CDAC array; sets full-scale range |
| +VCC (Pins 12 & 20) | Power Supply | Dual VCC pins reduce IR drop and improve PSRR in high-throughput operation |
| GND (Pins 13 & 14) | Analog/Digital Ground | Separate ground pins minimize coupling between analog sampling and digital switching noise |
| CS | Chip Select | Active-low enable controlling DOUT tri-state and DIN latching; required for multi-device buses |
| DIN/DOUT | Serial Data I/O | CMOS-compatible bidirectional data lines synchronized to DCLK falling edge (DOUT) |
| BUSY | Conversion Status Flag | Open-drain output indicating active conversion or control-bit latching; usable for interrupt-driven firmware |
| DCLK | Serial Clock Input | Accepts 0–2.4MHz clock; determines data rate and (in external mode) conversion timing |
Key Features
| Feature | Design Value |
|---|---|
| 8-channel analog multiplexer | Reduces system component count by integrating channel selection-no external MUX or routing logic needed |
| Configurable input mode | Single-ended (8 ch) or differential (4 ch) operation selected dynamically via SPI control byte, not hardware straps |
| Internal clock option | Eliminates need for precise external clock source; allows host MCU to read conversion result at its own pace |
| Low-power shutdown | Reduces supply current to <3µA in auto power-down mode (PD1=PD0=0), extending battery life in intermittent-sampling systems |
| Overvoltage-tolerant digital I/O | DIN/DOUT/CS tolerate up to +5.5V regardless of +VCC, simplifying level-shifting in mixed-voltage systems |
Applications
| Portable Data Logger | Industrial Sensor Interface |
|---|---|
|
Use Scenario: Multi-channel temperature, pressure, and humidity monitoring in field-deployable environmental sensors powered by Li-ion batteries. IC Role / Device Role / Timing Role: Central 16-bit ADC acquiring synchronized samples across 8 sensor channels with programmable gain and reference scaling. Use Value: 10mW typical power at 100kHz enables >100 hours of continuous logging; QSOP-20 footprint fits compact enclosures. |
Use Scenario: Analog signal conditioning in PLC I/O modules interfacing 4–20mA transmitters and RTDs. IC Role / Device Role / Timing Role: High-accuracy front-end digitizer with differential input support for noise-rejecting current-loop measurements. Use Value: 84dB SINAD and 100dB channel-to-channel isolation suppress common-mode interference in electrically noisy factory environments. |
| Handheld Test Equipment | Battery-Powered Medical Monitor |
|
Use Scenario: Compact multimeter or oscilloscope probe interface capturing AC/DC voltage, current, and frequency with autoranging. IC Role / Device Role / Timing Role: Precision sampling engine with on-the-fly input configuration (SGL/DIF, channel select) driven by ARM Cortex-M firmware. Use Value: 16-bit resolution and ±0.05% gain error ensure traceable metrology-grade accuracy without factory recalibration. |
Use Scenario: Vital sign acquisition (ECG, SpO₂, respiration) in wearable patient monitors requiring clinical-grade fidelity and ultra-low power. IC Role / Device Role / Timing Role: Low-noise, low-drift ADC digitizing amplified biopotential signals with programmable reference for dynamic range optimization. Use Value: Shutdown mode (<15µW) extends battery life during sleep intervals; COM-referenced inputs simplify electrode biasing. |
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 only; no CH4–CH7 pins; identical QSOP-20 footprint and SPI interface | Lacks 8-channel flexibility; suitable only where ≤4 inputs are required | Select ADS8345IPW if BOM cost reduction is prioritized and channel count is fixed at four |
| ADS8325IPW | 16-bit, 1MSPS throughput, no on-chip MUX; requires external analog switch; higher power (25mW) | Higher speed but demands additional components and layout area for channel routing | Choose ADS8325IPW only when >100kHz sampling is mandatory and system-level MUX is already present |
Compared with ADS8344E/2K5, ADS8345IPW offers identical performance in a smaller channel-count variant, while ADS8325IPW trades integration for speed-neither provides pin-for-pin replacement, but both serve overlapping precision data acquisition roles with distinct system-level trade-offs.
Availability
ADS8344E/2K5 is available at Aetrix Electronics and suitable for portable instrumentation, industrial process controllers, and battery-powered medical devices requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for ADS8344E/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, embedded processing, and high-reliability ICs for industrial, automotive, and communications markets.
The ADS8344E/2K5 belongs to TI's precision data acquisition portfolio, designed specifically for portable and low-power 16-bit measurement systems needing integrated multiplexing and flexible reference scaling.
FAQ
What is the maximum sampling rate supported by the ADS8344E/2K5?
The ADS8344E/2K5 achieves a maximum throughput rate of 100kHz under specified conditions (fDCLK = 2.4MHz, +5V supply). This corresponds to a minimum conversion time of 10µs per sample, including acquisition and SAR decision cycles. At lower supply voltages (e.g., +2.7V), the same 100kHz rate is maintained per electrical specifications.
Does the ADS8344E/2K5 require an external reference voltage?
Yes, the ADS8344E/2K5 requires an external reference applied to the VREF pin. It accepts any stable voltage from 0.5V to +VCC, directly setting the full-scale input range (0V to VREF). The reference is unbuffered and draws current proportional to conversion rate-typically 13µA at 2.5V/100kHz-so a low-impedance source is essential.
Can the ADS8344E/2K5 operate in differential input mode?
Yes, the ADS8344E/2K5 supports true differential input mode using four channel pairs (e.g., CH0/CH4, CH1/CH5) selected via the SGL/DIF bit and A2–A0 address bits. In this mode, the device measures the voltage difference between two inputs, rejecting common-mode noise up to 100dB, as confirmed in the datasheet's dynamic characterization section.
What package type is used for the ADS8344E/2K5?
The ADS8344E/2K5 is supplied in a 20-pin QSOP (Quad Small Outline Package) with designation DBQ, measuring 7.2mm × 4.4mm × 1.75mm. This surface-mount package features gull-wing leads, 0.65mm pitch, and is RoHS-compliant-identical to the ADS8344E variant listed in TI's official ordering table.
How does the shutdown feature work on the ADS8344E/2K5?
The ADS8344E/2K5 provides dual shutdown control: hardware via the SHDN pin (active-low, reduces current to <15µW), and software via PD1/PD0 bits in the control byte (auto power-down between conversions, <3µW). Both methods preserve register state and allow instant wake-up with no initialization delay-critical for duty-cycled battery systems.
ADS8344E/2K5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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/2K5 FAQ
1.How can I place an order for ADS8344E/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8344E/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 ADS8344E/2K5 reliable?
The price and inventory of ADS8344E/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8344E/2K5 is usually 5 days.
3.What payment methods are accepted for ADS8344E/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8344E/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8344E/2K5?
ADS8344E/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8344E/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 ADS8344E/2K5?
For technical support, including ADS8344E/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8344E/2K5 requirements.
6.How does Aetrix verify that ADS8344E/2K5 is sourced from the original manufacturer or authorized distributors?
All ADS8344E/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 ADS8344E/2K5 meets industry standards.
7.What is the process for return or replacement of ADS8344E/2K5?
All ADS8344E/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with ADS8344E/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 ADS8344E/2K5 part is unused and in its original packaging.
Return procedure for ADS8344E/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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