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Texas Instruments ADS8344NB/1K
- Part No.:
- ADS8344NB/1K
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
ADS8344NB/1K.pdf
- Description:
- IC ADC 16BIT SAR 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,563
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Product details
Overview
ADS8344NB/1K 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 where low power, high resolution, and flexible input routing are critical.
For engineers reviewing the ADS8344NB/1K datasheet, ADS8344NB/1K pinout, ADS8344NB/1K application, or ADS8344NB/1K equivalent, this page delivers verified specifications, SSOP-20 package mapping, real-world use context for battery-powered instrumentation, and two validated alternative parts with documented functional and parametric differences.
Technical Context
The ADS8344NB/1K implements a capacitive redistribution successive approximation register (SAR) architecture with integrated sample-and-hold. Its analog front-end uses an 8-channel multiplexer configurable via serial control bits (A2–A0 and SGL/DIF) to route either single-ended inputs referenced to COM or differential pairs across CH0–CH7.
Digital operation relies on a synchronous 4-wire serial interface (CS, DCLK, DIN, DOUT) supporting both external clock mode (fDCLK = 24 × fSAMPLE) and internal clock mode (2.4MHz max). BUSY output signals conversion status, and SHDN enables sub-15µW shutdown power.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 discrete output codes for high-precision voltage digitization. |
| Input Channels | 8 single-ended or 4 differential - enables multi-sensor monitoring without external MUX hardware. |
| Throughput Rate | 100kHz - supports real-time sampling of fast transients in test equipment and process control loops. |
| SINAD | 84dB at 10kHz - ensures ≥13.6 effective number of bits (ENOB) for accurate signal reconstruction. |
| Supply Range | 2.7V to 5V - allows direct integration into 3.3V or 5V embedded systems without level-shifting. |
| Power Dissipation | 5mW at 100kHz / +2.7V - extends battery life in portable PDAs and handheld loggers. |
| Operating Temp | –40°C to +85°C - qualified for industrial environments including factory automation and remote sensing. |
Pinout & Package
ADS8344NB/1K is housed in a 20-pin SSOP (Shrink Small Outline Package) with 0.65mm lead pitch, JEDEC MO-153 compliant, and moisture sensitivity level (MSL) 3. The package provides compact footprint and thermal performance suitable for space-constrained PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–8 (CH0–CH7) | Analog input channels | Accept single-ended or differential voltage sources; routed by A2–A0 and SGL/DIF control bits. |
| 9 (COM) | Analog ground reference | Sets zero-code point in single-ended mode; connects to system AGND or bias reference. |
| 10 (SHDN) | Shutdown enable | Active-low input; reduces supply current to ≤3µA when asserted, enabling ultra-low-power sleep states. |
| 11 (VREF) | External reference input | Defines full-scale range (0V to VREF); accepts 0.5V to +VCC, enabling flexible input scaling. |
| 12, 20 (+VCC) | Positive supply | Dual power pins reduce IR drop and improve PSRR; support 2.7V–5V operation with 1.2–1.85mA quiescent current. |
| 13–14 (GND) | Analog/digital ground | Separate GND pins minimize noise coupling between analog and digital sections. |
| 15 (DOUT) | Serial data output | CMOS-compatible, tri-state when CS is high; outputs MSB-first straight-binary code on DCLK falling edge. |
| 16 (BUSY) | Conversion status flag | Active-low open-drain output; asserts during control-bit latching and conversion; indicates valid DOUT timing window. |
| 17 (DIN) | Serial data input | Latches control byte (S, A2–A0, SGL/DIF, PD1–PD0) on DCLK rising edge when CS is low. |
| 18 (CS) | Chip select | Active-low enable; controls DOUT tri-state and DIN latching; must be held low for full 24-clock conversion cycle. |
| 19 (DCLK) | Serial clock input | Drives data transfer and (in external mode) SAR conversion timing; supports up to 2.4MHz clock rate. |
Key Features
| Feature | Design Value |
|---|---|
| Pin compatibility with ADS7844 | Enables drop-in upgrade path from 12-bit to 16-bit resolution without PCB redesign. |
| Configurable input topology | Software-selectable single-ended (8 ch) or differential (4 ch) mode via serial command, reducing BOM count. |
| Internal clock mode | Eliminates need for precise external clock source; allows host MCU to read conversion result at its own pace (0–2.0MHz). |
| Low-power shutdown | Reduces supply current to ≤3µA, extending runtime in battery-powered data loggers and portable instruments. |
| Channel-to-channel isolation | ≥100dB 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 sensors monitoring temperature, pressure, and humidity. IC Role / Device Role / Timing Role: Primary ADC capturing synchronized samples from 8 analog sensor outputs with 16-bit precision and <100ns aperture jitter. Use Value: Enables high-fidelity waveform capture and post-processing without external amplification or anti-alias filtering due to 84dB SINAD and 100kHz throughput. |
Use Scenario: Portable oscilloscope front-end digitizing analog signals up to 50kHz bandwidth. IC Role / Device Role / Timing Role: High-resolution sampling engine interfacing directly to probe conditioning circuitry and microcontroller via SPI-like serial bus. Use Value: Delivers 13.6+ ENOB and 92dB SFDR, supporting accurate harmonic analysis and distortion measurement in handheld lab tools. |
| Industrial Process Control | Battery-Powered Systems |
|
Use Scenario: PLC I/O module acquiring analog feedback from motor drives, flow meters, and valve positioners. IC Role / Device Role / Timing Role: Isolated analog input conditioner converting 4–20mA or ±10V signals into digital values for real-time closed-loop control. Use Value: 8-channel integration reduces component count per slot; –40°C to +85°C rating ensures reliability in harsh factory environments. |
Use Scenario: Personal digital assistant (PDA) digitizing stylus position, battery voltage, and ambient light levels. IC Role / Device Role / Timing Role: Low-voltage ADC operating from 2.7V supply with dynamic power scaling via SHDN and PD bits. Use Value: 5mW typical power at 100kHz and sub-15µW shutdown extend single-charge battery life beyond 100 hours in intermittent-sampling mode. |
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/2K5 | Higher-grade variant: ±0.024% gain error (vs ±0.05% for ADS8344NB/1K) and 6 LSB integral linearity (vs 8 LSB). | Required for metrology-grade calibration equipment demanding <0.03% full-scale accuracy. | Select ADS8344EB/2K5 only when traceable gain match and tighter INL are mandatory; otherwise ADS8344NB/1K offers optimal cost/performance balance. |
| ADS8343N/1K | 4-channel version (no CH4–CH7), identical resolution, speed, and package; shares same pinout except unused pins 5–8 are no-connect. | Suitable for designs needing only four analog inputs-reduces channel routing complexity and software overhead. | Choose ADS8343N/1K to simplify firmware and layout when 4-channel capability suffices; retains full pin compatibility for future scalability. |
Compared with ADS8344EB/2K5, ADS8344NB/1K trades minor gain and linearity precision for lower unit cost and broader availability; compared with ADS8343N/1K, it adds four extra channels without changing PCB footprint or driver code structure-enabling seamless feature upgrades.
Availability
ADS8344NB/1K is available at Aetrix Electronics and suitable for data acquisition systems, industrial process controllers, and battery-powered portable instruments requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ADS8344NB/1K 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-performance signal chain solutions, with decades of expertise in precision data converters.
The ADS8344 product line was designed for portable and industrial applications demanding high-resolution, low-power, multi-channel analog digitization with minimal external components and flexible input configuration.
FAQ
What is the maximum sampling rate supported by the ADS8344NB/1K?
The ADS8344NB/1K supports a maximum throughput rate of 100kHz under specified conditions (fDCLK = 2.4MHz, +VCC = 2.7V–5V). This corresponds to a minimum conversion time of 10µs per sample, achievable in external clock mode with proper timing compliance per Table VI in the SBAS139E datasheet. Internal clock mode maintains the same 100kHz rate but decouples conversion timing from host clock constraints.
Does the ADS8344NB/1K require an external reference voltage?
Yes, the ADS8344NB/1K requires an external reference voltage applied to the VREF pin. It accepts 0.5V to +VCC, setting the full-scale input range (0V to VREF). The device does not include an internal reference; using a stable, low-noise external reference-such as the REF5025-is essential to achieve specified 84dB SINAD and ±0.05% gain accuracy.
Can the ADS8344NB/1K operate from a 3.3V supply?
Yes, the ADS8344NB/1K is fully specified for 2.7V to 5V single-supply operation, including 3.3V. At +VCC = 3.3V, it delivers 100kHz throughput, 84dB SINAD, and consumes approximately 3.2–5mW depending on conversion rate. Digital logic levels remain CMOS-compatible, with VIH ≥ 0.7×VCC and VOL ≤ 0.4V, ensuring reliable interfacing with 3.3V microcontrollers.
How does the SHDN pin function on the ADS8344NB/1K?
The SHDN pin on the ADS8344NB/1K is an active-low shutdown control. When pulled LOW, it places the device in ultra-low-power mode, reducing supply current to ≤3µA while preserving register state. The device resumes full operation within microseconds of SHDN returning HIGH, with no initialization delay-making it ideal for duty-cycled battery-powered systems where the ADS8344NB/1K wakes only for scheduled sampling bursts.
Is the ADS8344NB/1K pin-compatible with the ADS7844?
Yes, the ADS8344NB/1K is explicitly pin-compatible with the ADS7844 as stated in the official TI datasheet (SBAS139E, "FEATURES" section). Both devices share identical SSOP-20 or QSOP-20 footprints, matching pin functions (CH0–CH7, COM, SHDN, VREF, +VCC, GND, DOUT, BUSY, DIN, CS, DCLK), and compatible timing-enabling direct replacement to upgrade from 12-bit to 16-bit resolution without layout changes.
ADS8344NB/1K Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-SSOP (0.209", 5.30mm 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:
- -
ADS8344NB/1K FAQ
1.How can I place an order for ADS8344NB/1K through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8344NB/1K 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 ADS8344NB/1K reliable?
The price and inventory of ADS8344NB/1K are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8344NB/1K is usually 5 days.
3.What payment methods are accepted for ADS8344NB/1K?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8344NB/1K transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8344NB/1K?
ADS8344NB/1K orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8344NB/1K 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 ADS8344NB/1K?
For technical support, including ADS8344NB/1K datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8344NB/1K requirements.
6.How does Aetrix verify that ADS8344NB/1K is sourced from the original manufacturer or authorized distributors?
All ADS8344NB/1K 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 ADS8344NB/1K meets industry standards.
7.What is the process for return or replacement of ADS8344NB/1K?
All ADS8344NB/1K units undergo pre-shipment inspection (PSI). If there is an issue with ADS8344NB/1K, 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 ADS8344NB/1K part is unused and in its original packaging.
Return procedure for ADS8344NB/1K:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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