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Texas Instruments ADS8344NB/1KG4
- Part No.:
- ADS8344NB/1KG4
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
ADS8344NB/1KG4.pdf
- Description:
- IC ADC 16BIT SAR 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,060
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Product details
Overview
ADS8344NB/1KG4 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 features an on-chip 8-channel multiplexer supporting single-ended or 4-channel differential inputs, and operates across –40°C to +85°C in SSOP-20 package - ideal for portable data acquisition and battery-powered test equipment.
For engineers reviewing the ADS8344NB/1KG4 datasheet, ADS8344NB/1KG4 pinout, ADS8344NB/1KG4 application, or ADS8344NB/1KG4 equivalent, key selection considerations include its 16-bit resolution with ±0.024% gain error (NB grade), shutdown mode (<3µA), external reference flexibility (0.5V to VCC), and compatibility with microprocessor serial interfaces requiring precise timing control and low-noise analog front-end design.
Technical Context
The ADS8344NB/1KG4 implements a capacitive redistribution SAR architecture with integrated sample-and-hold, enabling true 16-bit accuracy without external hold circuitry. Its input stage supports configurable 8-channel single-ended or 4-channel differential acquisition via A2–A0 and SGL/DIF control bits, with COM pin referenced zero-code alignment.
Digital interface uses a 24-clock-cycle synchronous serial protocol (DIN/DOUT/BUSY/DCLK/CS) supporting both external clock mode (fDCLK = 24 × fSAMPLE) and internal clock mode (auto-generated 2.4MHz conversion clock), while SHDN enables sub-3µA power-down between conversions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 discrete output codes for high-fidelity signal digitization in precision measurement systems. |
| Throughput Rate | 100kHz - supports real-time sampling of fast transients in industrial process monitoring and PDA-based sensors. |
| SINAD | 84dB at 10kHz - ensures ≥13.6 effective number of bits (ENOB) for clean spectral performance in noise-sensitive applications. |
| Gain Error | ±0.024% (ADS8344NB grade) - reduces full-scale calibration burden in multi-channel systems requiring channel-to-channel matching. |
| Supply Range | 2.7V to 5V - enables direct integration into mixed-voltage embedded systems powered by Li-ion or regulated 3.3V/5V rails. |
| Reference Range | 0.5V to VCC - allows scalable input range tuning (e.g., 0–2.5V or 0–5V) without external op-amp buffering. |
| Power Dissipation | 5mW at 100kHz / +2.7V - extends battery life in portable instrumentation with minimal thermal impact. |
Pinout & Package
ADS8344NB/1KG4 is housed in a 20-pin SSOP (Shrink Small Outline Package) with 0.65mm lead pitch, JEDEC MO-153 compliant, and rated for –40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 (Pins 1–8) | Analog Input Channels | Eight single-ended inputs; configurable as four differential pairs (e.g., CH0/CH4) via SGL/DIF control bit. |
| COM (Pin 9) | Analog Ground Reference | Sets zero-code voltage in single-ended mode; must be connected to system ground or stable reference point. |
| SHDN (Pin 10) | Shutdown Control | Active-low input; reduces supply current to <3µA when asserted, enabling rapid wake-up without reset delay. |
| VREF (Pin 11) | External Reference Input | Unbuffered input driving CDAC array; sets full-scale span (0V to VREF); requires low-noise, low-impedance source. |
| +VCC (Pins 12, 20) | Power Supply | Dual VCC pins minimize IR drop and improve PSRR; accepts 2.7V–5V with 1.2–1.85mA quiescent current at +2.7V. |
| GND (Pins 13, 14) | Analog/Digital Ground | Separate ground pins reduce coupling between analog sampling and digital switching noise. |
| DOUT (Pin 15) | Serial Data Output | Three-state CMOS output; data valid on DCLK falling edge; high-impedance when CS is HIGH. |
| BUSY (Pin 16) | Conversion Status Flag | Active-low open-drain output indicating acquisition/conversion in progress; synchronizes host read timing. |
| DIN (Pin 17) | Serial Data Input | Accepts 24-bit control byte (START/A2–A0/SGL/DIF/PD1–PD0); latched on DCLK rising edge when CS is LOW. |
| CS (Pin 18) | Chip Select | Active-low enable; gates all serial I/O and BUSY output; must be held LOW during full 24-clock transaction. |
| DCLK (Pin 19) | Serial Clock Input | Drives data transfer and (in external mode) controls SAR conversion steps; supports up to 2.4MHz clock rate. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip 8-channel analog multiplexer | Eliminates need for external MUX and associated layout complexity, reducing BOM count and board area in multi-sensor systems. |
| Configurable single-ended/differential input | Supports both grounded-signal (CHx-to-COM) and floating-signal (CHx-to-CHy) acquisition without hardware change - selected via software control bits. |
| Internal clock mode (PD1=1, PD0=0) | Removes dependency on host MCU generating precise SAR clock; enables flexible read timing and simplifies firmware timing constraints. |
| Low-power shutdown (<3µA) | Enables energy-efficient duty-cycled operation in battery-powered loggers, extending runtime between charges without sacrificing startup latency. |
| CMOS-compatible digital interface | Ensures interoperability with standard 3.3V/5V microcontrollers; overvoltage-tolerant inputs (to +5.5V) simplify level-shifting requirements. |
Applications
| Data Acquisition Systems | Portable Test Equipment |
|---|---|
|
Use Scenario: Multi-channel voltage logging in environmental sensor nodes measuring temperature, pressure, and humidity via resistive bridges and thermistors. IC Role / Device Role / Timing Role: Central ADC managing time-multiplexed analog inputs with synchronized sampling and serial data streaming to MCU over SPI-like interface. Use Value: 16-bit resolution captures small ΔR changes in bridge sensors; 84dB SINAD preserves dynamic range despite noisy industrial ambient conditions. |
Use Scenario: Handheld oscilloscope module capturing transient waveforms at ≤100kS/s with battery operation and compact form factor. IC Role / Device Role / Timing Role: High-accuracy sampling front-end with internal clock mode decoupling acquisition timing from host processor clock jitter. Use Value: 2.7V operation and 5mW dissipation extend battery life; SSOP-20 footprint enables dense PCB layout in space-constrained enclosures. |
| Industrial Process Controllers | Personal Digital Assistants (PDAs) |
|
Use Scenario: Analog I/O expansion for PLCs monitoring motor currents, valve positions, and analog setpoints in factory automation. IC Role / Device Role / Timing Role: Isolated ADC subsystem digitizing 4–20mA loop signals and thermocouple outputs with channel-to-channel isolation >100dB. Use Value: ±0.024% gain error (NB grade) minimizes per-channel calibration; COM-referenced inputs simplify connection to field transmitters. |
Use Scenario: Integrated data capture in legacy PDAs acquiring pen-input coordinates, audio samples, and biometric sensor data. IC Role / Device Role / Timing Role: Low-voltage ADC interfacing directly to 3.3V SoC with minimal external components - no charge pump or LDO required. Use Value: Single 2.7V supply eliminates dual-rail design; serial interface reduces pin count vs parallel ADC, preserving precious GPIO resources. |
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 | Same architecture and pinout; tighter ±0.024% gain error spec and 6 LSB integral linearity (vs 8 LSB for NB), QSOP-20 package. | Preferred for metrology-grade instruments requiring highest DC accuracy; QSOP offers slightly better thermal dissipation than SSOP. | Select ADS8344EB/2K5 when absolute gain matching and lower INL are critical, and board layout accommodates QSOP footprint. |
| ADS7844E/1K | 12-bit resolution, same 8-channel MUX, identical serial interface and SSOP-20 package; lower power (2.5mW), but only 70dB SINAD. | Suitable for cost-sensitive, lower-precision applications like basic sensor monitoring where 12-bit resolution suffices. | Choose ADS7844E/1K when system SNR requirements are ≤70dB and BOM cost reduction outweighs resolution loss. |
Compared with ADS8344EB/2K5, ADS8344NB/1KG4 trades marginal DC accuracy for identical AC performance and SSOP packaging; versus ADS7844E/1K, it delivers 4 extra bits and 14dB higher SINAD at modest power increase - making ADS8344NB/1KG4 the optimal balance for mid-tier portable instrumentation.
Availability
ADS8344NB/1KG4 is available at Aetrix Electronics and suitable for data acquisition systems, portable test equipment, and industrial process controllers requiring stable component supply, long-term manufacturability, and guaranteed temperature-grade performance.
Supply support for ADS8344NB/1KG4 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 ADS8344 product line was engineered for high-resolution, low-power, multi-channel data acquisition in portable and harsh-environment applications - emphasizing configurability, serial interface simplicity, and robust DC/AC performance across wide supply and temperature ranges.
FAQ
What is the maximum sampling rate supported by the ADS8344NB/1KG4?
The ADS8344NB/1KG4 supports a maximum throughput rate of 100kHz, achieved using an external clock frequency of 2.4MHz (fDCLK = 24 × fSAMPLE). This rate is fully specified across the –40°C to +85°C temperature range and at both 2.7V and 5V supply voltages, with no derating required for the NB grade.
Does the ADS8344NB/1KG4 require an external reference voltage?
Yes, the ADS8344NB/1KG4 requires an external reference voltage 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 device does not include an internal reference; reference stability and noise directly impact overall ADC accuracy and noise floor.
How does the ADS8344NB/1KG4 handle differential input configurations?
The ADS8344NB/1KG4 supports differential inputs via its 8-channel MUX using the SGL/DIF control bit and A2–A0 address bits. When SGL/DIF = LOW, pairs such as CH0/CH4, CH1/CH5, CH2/CH6, and CH3/CH7 are configured as differential inputs, with COM pin unused. This mode provides common-mode rejection and improved noise immunity over single-ended operation.
What is the purpose of the SHDN pin on the ADS8344NB/1KG4?
The SHDN (shutdown) pin on the ADS8344NB/1KG4 is an active-low control that places the device into ultra-low-power mode, reducing supply current to under 3µA. In this state, the analog core and reference buffer are disabled, but register contents and configuration are retained. Asserting SHDN does not require reinitialization upon wake-up.
Can the ADS8344NB/1KG4 operate from a 3.3V supply?
Yes, the ADS8344NB/1KG4 is fully specified for operation from 2.7V to 5V, including standard 3.3V supplies. At +3.3V, it maintains 100kHz throughput, 84dB SINAD, and ±0.024% gain error, with typical supply current of 220µA during conversion and <3µA in shutdown - making it ideal for 3.3V embedded systems.
ADS8344NB/1KG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- -
ADS8344NB/1KG4 FAQ
1.How can I place an order for ADS8344NB/1KG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8344NB/1KG4 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/1KG4 reliable?
The price and inventory of ADS8344NB/1KG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8344NB/1KG4 is usually 5 days.
3.What payment methods are accepted for ADS8344NB/1KG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8344NB/1KG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8344NB/1KG4?
ADS8344NB/1KG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8344NB/1KG4 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/1KG4?
For technical support, including ADS8344NB/1KG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8344NB/1KG4 requirements.
6.How does Aetrix verify that ADS8344NB/1KG4 is sourced from the original manufacturer or authorized distributors?
All ADS8344NB/1KG4 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/1KG4 meets industry standards.
7.What is the process for return or replacement of ADS8344NB/1KG4?
All ADS8344NB/1KG4 units undergo pre-shipment inspection (PSI). If there is an issue with ADS8344NB/1KG4, 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/1KG4 part is unused and in its original packaging.
Return procedure for ADS8344NB/1KG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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