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Texas Instruments ADS8344NBG4
- Part No.:
- ADS8344NBG4
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
ADS8344NBG4.pdf
- Description:
- IC ADC 16BIT SAR 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,888
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Product details
Overview
ADS8344NBG4 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 supporting single-ended or 4-channel differential inputs, 84dB SINAD at 10kHz, and shutdown mode reducing power to <15µW. It is used in portable data acquisition systems requiring high resolution and low power.
For engineers reviewing the ADS8344NBG4 datasheet, ADS8344NBG4 pinout, ADS8344NBG4 application, or ADS8344NBG4 equivalent, key selection considerations include its 16-bit resolution with ±0.05% gain error (typ. ±0.024% for NB variant), QSOP-20/SSOP-20 package compatibility, 24-cycle serial interface timing, and support for external or internal clock modes.
Technical Context
The ADS8344NBG4 implements a capacitive redistribution SAR architecture with integrated sample-and-hold, enabling precise 16-bit conversion without external hold circuitry. Its input stage accepts either 8-channel single-ended or 4-channel differential configurations via programmable A2–A0 and SGL/DIF control bits, with COM pin defining the reference point for single-ended operation.
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. Clock mode (internal or external) is selected via PD1/PD0 bits, with internal mode allowing asynchronous readout at processor convenience.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 discrete output codes for high-precision measurement applications. |
| Throughput Rate | 100 kHz - supports real-time sampling of fast transients in test equipment and industrial monitoring. |
| SINAD | 84 dB at 10 kHz - ensures >13.6 effective number of bits (ENOB) for clean signal digitization. |
| Gain Error | ±0.024% (ADS8344NB variant) - enables accurate absolute voltage measurement without per-unit calibration. |
| Supply Range | 2.7 V to 5 V - allows direct integration into battery-powered (3.3 V) and legacy 5 V systems. |
| Power Dissipation | 5 mW at 100 kHz / 2.7 V - extends runtime in PDA and handheld data loggers. |
| Reference Range | 0.5 V to VCC - permits flexible full-scale input scaling (e.g., 0–2.5 V or 0–5 V) using external or internal references. |
Pinout & Package
ADS8344NBG4 is packaged in SSOP-20 (Package Drawing DB), a 0.65 mm pitch, surface-mount package with 20 leads and exposed thermal pad (not electrically connected). It is rated for –40°C to +85°C operation and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 | Analog Input Channels | Eight single-ended inputs; configurable as four differential pairs (CH0/CH4, CH1/CH5, etc.) via SGL/DIF bit. |
| COM | Analog Ground Reference | Sets zero-code voltage in single-ended mode; must be tied to system ground or stable reference point. |
| SHDN | Shutdown Control | Active-low input; pulls device into <15 µW standby when asserted, enabling rapid wake-up for burst-mode sampling. |
| VREF | External Reference Input | Unbuffered input driving CDAC array; sets full-scale range (0 V to VREF); requires low-noise, low-impedance source. |
| +VCC (Pins 12 & 20) | Power Supply | Dual power pins reduce supply path inductance; supports 2.7–5 V operation with typical quiescent current of 220 µA @ 100 kHz. |
| GND (Pins 13 & 14) | Analog/Digital Ground | Separate ground pins minimize noise coupling between analog front-end and digital interface sections. |
| DIN / DOUT / DCLK / CS / BUSY | Serial Interface Signals | Four-wire CMOS-compatible interface; DOUT is tri-stated when CS = high; BUSY indicates conversion progress. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip 8-channel multiplexer | Reduces external component count and PCB area in multi-sensor systems; eliminates need for external analog switches or MUX ICs. |
| Programmable clock mode (internal/external) | Internal clock relieves MCU timing constraints; external clock enables deterministic latency-critical for synchronized sampling across multiple ADCs. |
| 24-cycle serial protocol with START bit | Ensures robust synchronization and eliminates misreads due to clock skew or metastability during control byte latching. |
| Channel-to-channel isolation >100 dB | Prevents crosstalk between adjacent channels during simultaneous multi-point measurements in process control or sensor arrays. |
| Auto power-down between conversions | PD1=PD0=0 setting cuts average current to ~3 µA during idle periods-ideal for duty-cycled battery-powered telemetry nodes. |
Applications
| Data Acquisition Systems | Test & Measurement Equipment |
|---|---|
|
Use Scenario: Portable multi-channel data loggers capturing temperature, pressure, and strain from distributed sensors in field-deployed environmental monitoring stations. IC Role / Device Role / Timing Role: Primary ADC performing synchronized 16-bit sampling across 8 analog inputs, with internal clock mode decoupling timing from host controller. Use Value: Enables 100 kHz aggregate throughput across channels while maintaining <15 µW shutdown power-extending battery life to >1 year on two AA cells. |
Use Scenario: Benchtop multimeters and oscilloscope front-ends requiring high DC accuracy and AC performance up to 10 kHz. IC Role / Device Role / Timing Role: High-resolution digitizer interfacing directly to precision op-amp signal conditioning stages, referenced to low-drift 2.5 V bandgap. Use Value: 84 dB SINAD and ±0.024% gain error ensure traceable metrology-grade readings without post-conversion linearization. |
| Industrial Process Control | Battery-Powered Systems |
|
Use Scenario: PLC analog input modules acquiring 4–20 mA loop signals from flow meters, level transmitters, and valve positioners in hazardous-area enclosures. IC Role / Device Role / Timing Role: Isolated ADC receiving conditioned current-loop outputs via precision shunt resistors; operates from 3.3 V rail with low EMI emissions. Use Value: 100 dB channel-to-channel isolation prevents cross-talk between critical safety loops; 2.7 V minimum supply supports brownout resilience. |
Use Scenario: Personal digital assistants and handheld medical devices measuring biopotentials (ECG, EMG) with ultra-low power budget. IC Role / Device Role / Timing Role: Low-noise, low-power ADC with programmable gain and differential input configuration for front-end signal integrity. Use Value: 5 mW active power at 100 kHz and <15 µW shutdown enable continuous sensing with sub-10 µA average current over sleep/wake cycles. |
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); identical SSOP-20 package and pinout except missing CH4–CH7 pins. | Not suitable for 8-channel systems; appropriate only where channel count reduction is acceptable to simplify layout or reduce cost. | Select ADS8345IPW only if design uses ≤4 analog inputs and board space allows removal of unused channel traces. |
| ADS8325IPW | 16-bit, 1-MSPS SAR ADC in TSSOP-20; higher speed but no on-chip MUX; requires external analog switching for multi-channel use. | Requires additional components (MUX, drivers) and layout area; better suited for high-speed single-channel applications than multi-input DAQ. | Choose ADS8325IPW when throughput >100 kHz is required and channel count is fixed at one; not a drop-in replacement for ADS8344NBG4. |
Compared with ADS8344NBG4, ADS8345IPW offers identical functionality in a reduced channel count, simplifying design where 4 inputs suffice; ADS8325IPW trades integrated multiplexing for raw speed, demanding external signal routing and increasing BOM complexity for multi-channel use.
Availability
ADS8344NBG4 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 guaranteed RoHS-compliant sourcing.
Supply support for ADS8344NBG4 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 signal chain solutions.
The ADS8344 series was designed for high-resolution, low-power, multi-channel data acquisition in portable and harsh-environment applications-emphasizing integration, flexibility, and robustness over raw speed.
FAQ
What is the maximum sampling rate supported by the ADS8344NBG4?
The ADS8344NBG4 supports a maximum throughput rate of 100 kHz, achieved with a 2.4 MHz external clock (fDCLK = 24 × fSAMPLE). This rate is maintained across the full operating temperature range (–40°C to +85°C) and supply range (2.7 V to 5 V), as verified in the SBAS139E datasheet Electrical Characteristics tables.
Does the ADS8344NBG4 require an external reference voltage?
Yes, the ADS8344NBG4 requires an external reference voltage applied to the VREF pin. It accepts any stable reference between 0.5 V and VCC, and the full-scale input range is 0 V to VREF. The device does not include an internal reference; reference accuracy and noise directly impact overall system ENOB and gain error.
How does the ADS8344NBG4 handle differential input configurations?
The ADS8344NBG4 supports differential inputs via its 8-channel multiplexer: pairs CH0/CH4, CH1/CH5, CH2/CH6, and CH3/CH7 form four differential channels. Configuration is controlled by the SGL/DIF bit and A2–A0 address bits in the 8-bit control byte; when SGL/DIF = LOW, the selected pair defines +IN and –IN per Table II in the datasheet.
What is the purpose of the SHDN pin on the ADS8344NBG4?
The SHDN (shutdown) pin on the ADS8344NBG4 is an active-low control that places the device into a sub-15 µW standby state when driven LOW. In this mode, the internal bias circuits and reference buffer are disabled, but register contents and configuration are retained. Full functionality resumes within microseconds upon SHDN deassertion.
Can the ADS8344NBG4 operate from a 3.3 V supply?
Yes, the ADS8344NBG4 is fully specified for operation from 2.7 V to 5 V, including standard 3.3 V rails. At 3.3 V, it maintains 100 kHz throughput, 84 dB SINAD (at 1 kHz), and ±0.05% gain error (±0.024% for NB grade), with typical power dissipation of 3.2–5 mW depending on conversion rate and reference choice.
ADS8344NBG4 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:
- -
ADS8344NBG4 FAQ
1.How can I place an order for ADS8344NBG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8344NBG4 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 ADS8344NBG4 reliable?
The price and inventory of ADS8344NBG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8344NBG4 is usually 5 days.
3.What payment methods are accepted for ADS8344NBG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8344NBG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8344NBG4?
ADS8344NBG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8344NBG4 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 ADS8344NBG4?
For technical support, including ADS8344NBG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8344NBG4 requirements.
6.How does Aetrix verify that ADS8344NBG4 is sourced from the original manufacturer or authorized distributors?
All ADS8344NBG4 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 ADS8344NBG4 meets industry standards.
7.What is the process for return or replacement of ADS8344NBG4?
All ADS8344NBG4 units undergo pre-shipment inspection (PSI). If there is an issue with ADS8344NBG4, 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 ADS8344NBG4 part is unused and in its original packaging.
Return procedure for ADS8344NBG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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