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Texas Instruments ADS8344NG4
- Part No.:
- ADS8344NG4
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
ADS8344NG4.pdf
- Description:
- IC ADC 16BIT SAR 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,637
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Product details
Overview
ADS8344NG4 from Texas Instruments is a 16-bit, 8-channel SAR analog-to-digital converter with synchronous serial interface, ±0.05% gain error, 84dB SINAD, and 100kHz throughput rate. It operates from a single 2.7V–5V supply, supports single-ended or differential input configurations, and features on-chip multiplexer and shutdown mode for battery-powered data acquisition systems.
For engineers reviewing the ADS8344NG4 datasheet, ADS8344NG4 pinout, ADS8344NG4 application, or ADS8344NG4 equivalent, key selection considerations include its QSOP-20/SSOP-20 package compatibility, 16-cycle conversion time, VREF range (0.5V to VCC), channel-to-channel isolation (>100dB), and CMOS-level serial interface timing requirements.
Technical Context
The ADS8344NG4 implements a capacitive redistribution SAR architecture with integrated sample-and-hold, enabling precise 16-bit conversions without external hold circuitry. Its 8-channel analog multiplexer supports both single-ended (8 channels referenced to COM) and differential (4 channel pairs) configurations via SGL/DIF and A2–A0 control bits.
Digital interface uses a 24-clock-cycle protocol: 8 clocks for control byte (START, channel address, SGL/DIF, PD1/PD0), followed by 16 clocks for data output. BUSY signal indicates conversion status, and DOUT is tri-stated when CS is high - enabling clean isolation in remote DAQ systems.
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 test equipment and process control |
| SINAD | 84 dB at 10 kHz - ensures >13.6 effective number of bits (ENOB) for precision measurement |
| Gain Error | ±0.05% - limits full-scale accuracy drift across temperature and supply voltage variation |
| Supply Range | 2.7 V to 5 V - supports direct integration into 3.3 V and 5 V embedded systems without level-shifting |
| Power Dissipation | 10 mW at 5 V / 100 kHz - enables thermally constrained portable designs with low thermal overhead |
| Shutdown Current | <15 µW - extends battery life in intermittent-sampling applications like handheld loggers |
Pinout & Package
ADS8344NG4 is packaged in SSOP-20 (Package Drawing DB), a 0.65 mm pitch, 7.2 mm × 5.3 mm surface-mount package suitable for high-density PCB layouts. Pin functions are validated per TI SBAS139E datasheet Rev E.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 | Analog Input Channels | Eight single-ended inputs or four differential pairs; selected via A2–A0 and SGL/DIF bits |
| COM | Analog Ground Reference | Sets zero-code voltage in single-ended mode; connects to system ground or bias reference |
| SHDN | Shutdown Control | Active-low input; reduces supply current to <3 µA when asserted |
| VREF | External Reference Input | Defines full-scale range (0 V to VREF); unbuffered, requires low-impedance source (≤13 µA typical) |
| +VCC, GND | Power Supply | Dual +VCC pins (pins 12 & 20) and dual GND pins (13 & 14) reduce supply noise and improve PSRR |
| DIN, DOUT, DCLK, CS | Serial Interface | CMOS-compatible 4-wire SPI-like interface; DOUT tri-stated when CS = HIGH for bus sharing |
| BUSY | Conversion Status Flag | Active-low open-drain output; signals acquisition/conversion phase; not tri-stated in internal clock mode |
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 mode (SGL/DIF) | Enables flexible sensor interfacing - single-ended for grounded sensors, differential for noise-immune measurements |
| Internal clock option (PD1=1, PD0=0) | Offloads timing-critical SAR clock generation from host MCU; allows asynchronous readout at any DCLK ≤ 2 MHz |
| Channel-to-channel isolation >100 dB | Prevents crosstalk between adjacent channels during rapid multiplexing - critical for simultaneous multi-signal capture |
| Reference input range: 0.5 V to VCC | Supports wide dynamic range scaling - e.g., 0.5 V reference yields 7.6 µV LSB for microvolt-level resolution |
Applications
| Data Acquisition Systems | Test & Measurement Equipment |
|---|---|
|
Use Scenario: Multi-channel voltage logging in portable environmental monitors with thermocouples, RTDs, and strain gauges. IC Role / Device Role / Timing Role: Central ADC managing sequential sampling of 8 analog sensors via internal multiplexer; synchronized to host controller via CS/DCLK. Use Value: Single-chip solution replaces discrete mux + ADC combinations, reducing BOM cost and layout complexity while maintaining 16-bit linearity. |
Use Scenario: Benchtop digital multimeter capturing AC/DC voltage, current, and resistance with auto-ranging. IC Role / Device Role / Timing Role: High-SINAD front-end digitizer providing calibrated 100 kHz sampling for RMS calculation and harmonic analysis. Use Value: 84 dB SINAD and <1 LSB INL ensure metrology-grade accuracy without post-calibration firmware compensation. |
| Industrial Process Control | Battery-Powered Systems |
|
Use Scenario: PLC I/O module acquiring analog feedback from pressure, flow, and temperature transmitters in factory automation. IC Role / Device Role / Timing Role: Isolated ADC node converting 4–20 mA loop signals (via external resistor) with programmable gain and offset correction. Use Value: Dual GND/+VCC pins and high PSRR (>3 LSB at 4.75–5.25 V) suppress noise from shared industrial power rails. |
Use Scenario: Handheld PDA or medical glucose meter requiring ultra-low-power analog sensing between user interactions. IC Role / Device Role / Timing Role: Power-gated ADC activated only during measurement bursts; SHDN pin controlled by system PMU. Use Value: Sub-15 µW shutdown power extends coin-cell battery life to >1 year in intermittent-use devices. |
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 |
|---|---|---|---|
| ADS8343N | 8-channel, 16-bit, but limited to 50 kHz max throughput and no internal clock mode | Suitable for lower-speed monitoring where 100 kHz is unnecessary; lacks PD1/PD0 flexibility | Select ADS8343N only if cost sensitivity outweighs speed and clocking flexibility requirements |
| ADS8345N | Pin-compatible upgrade with 125 kHz throughput, improved 86 dB SINAD, and enhanced THD (-92 dB) | Better suited for high-fidelity audio test or vibration analysis requiring higher dynamic range | ADS8345N offers drop-in performance uplift where board space and pinout must be preserved |
Compared with ADS8344NG4, ADS8343N trades speed and clocking versatility for lower cost, while ADS8345N delivers measurable SNR/SFDR improvements within identical footprint constraints - making it ideal for next-generation upgrades without layout revision.
Availability
ADS8344NG4 is available at Aetrix Electronics and suitable for data acquisition, industrial process control, and battery-powered systems requiring stable component supply, long-term manufacturability, and guaranteed temperature-range compliance (–40°C to +85°C).
Supply support for ADS8344NG4 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 ADS8344NG4 belongs to TI's precision SAR ADC product line, engineered for high-resolution, low-power, multi-channel signal acquisition in portable and harsh-environment applications.
FAQ
What is the maximum conversion rate supported by the ADS8344NG4?
The ADS8344NG4 supports up to 100 kHz throughput rate when operated with a 2.4 MHz DCLK (24 × fSAMPLE). This is achievable across its full specified temperature range (–40°C to +85°C) and supply range (2.7 V to 5 V), as confirmed in the SBAS139E datasheet Electrical Characteristics tables for both +5 V and +2.7 V conditions. The ADS8344NG4 maintains this rate with ≤1 LSB integral nonlinearity and 84 dB SINAD.
Does the ADS8344NG4 require an external reference voltage?
Yes, the ADS8344NG4 requires an external reference voltage applied to the VREF pin. It accepts VREF from 0.5 V to VCC, directly setting the full-scale input range (0 V to VREF). The reference is unbuffered and draws up to 40 µA (typical 13 µA at 2.5 V), so a low-impedance, low-noise source - such as a precision voltage reference IC - is required for optimal performance. The ADS8344NG4 does not include an internal reference.
Can the ADS8344NG4 operate in differential input mode?
Yes, the ADS8344NG4 supports true differential input mode using four of its eight channels (e.g., CH0/CH1, CH2/CH3, etc.), configured via the SGL/DIF bit and A2–A0 address bits in the serial control byte. In differential mode, the device measures the voltage difference between two selected inputs, rejecting common-mode noise up to 100 dB - a capability verified in the SBAS139E datasheet's Dynamic Characteristics table under "Channel-to-Channel Isolation".
What package type is used for the ADS8344NG4?
The ADS8344NG4 is supplied in SSOP-20 (Small Outline Package, 20-pin), with package drawing designation DB. This 0.65 mm pitch, 7.2 mm × 5.3 mm surface-mount package is RoHS-compliant and compatible with standard reflow soldering processes. It shares pinout and footprint with the QSOP-20 variant (ADS8344E), enabling layout reuse across performance grades.
How does the ADS8344NG4 handle power-down between conversions?
The ADS8344NG4 enters low-power shutdown between conversions when PD1 = PD0 = 0 in the control byte. In this mode, supply current drops to <3 µA, and the device powers up instantly for the next conversion - no wake-up delay or invalid first sample. This behavior is explicitly documented in the SBAS139E datasheet Table V ("Power-Down Selection") and verified in Typical Characteristics plots for supply current vs. temperature.
ADS8344NG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
ADS8344NG4 FAQ
1.How can I place an order for ADS8344NG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8344NG4 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 ADS8344NG4 reliable?
The price and inventory of ADS8344NG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8344NG4 is usually 5 days.
3.What payment methods are accepted for ADS8344NG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8344NG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8344NG4?
ADS8344NG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8344NG4 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 ADS8344NG4?
For technical support, including ADS8344NG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8344NG4 requirements.
6.How does Aetrix verify that ADS8344NG4 is sourced from the original manufacturer or authorized distributors?
All ADS8344NG4 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 ADS8344NG4 meets industry standards.
7.What is the process for return or replacement of ADS8344NG4?
All ADS8344NG4 units undergo pre-shipment inspection (PSI). If there is an issue with ADS8344NG4, 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 ADS8344NG4 part is unused and in its original packaging.
Return procedure for ADS8344NG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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