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Texas Instruments ADS8344EG4
- Part No.:
- ADS8344EG4
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
ADS8344EG4.pdf
- Description:
- IC ADC 16BIT SAR 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,954
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Product details
Overview
ADS8344EG4 from Texas Instruments is a 16-bit, 8-channel SAR analog-to-digital converter with synchronous serial interface, single-supply operation (2.7V–5V), up to 100kHz throughput, 84dB SINAD, and QSOP-20 package. It integrates an on-chip 8-channel multiplexer and supports both single-ended (8-channel) and differential (4-channel) input configurations for precision data acquisition in portable and industrial systems.
For engineers reviewing the ADS8344EG4 datasheet, ADS8344EG4 pinout, ADS8344EG4 application, or ADS8344EG4 equivalent, key selection considerations include its 16-bit resolution with ±0.05% gain error (E-grade), 2.7V–5V supply flexibility, shutdown mode (<15µW), and compatibility with microprocessor serial interfaces requiring precise timing control and low-noise analog front-end design.
Technical Context
The ADS8344EG4 implements a capacitive redistribution SAR architecture with integrated sample-and-hold, enabling true 16-bit linearity without external components. Its analog input path supports programmable configuration via serial control bits (SGL/DIF, A2–A0) to select among eight single-ended or four differential channel pairs referenced to COM.
Digital operation is governed by a 24-cycle serial protocol: 8 cycles for control byte (including START, channel address, SGL/DIF, PD1/PD0), followed by 16 conversion cycles. BUSY output signals active conversion periods, while DOUT shifts out MSB-first straight-binary data on DCLK falling edges-enabling isolation-ready system integration.
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 monitoring |
| SINAD | 84 dB - ensures ≥13.6 effective number of bits (ENOB) at 10kHz input, critical for dynamic signal fidelity |
| Supply Range | 2.7 V to 5 V - supports direct interfacing with Li-ion battery rails and standard logic supplies |
| Gain Error | ±0.05% FSR (ADS8344E grade) - limits full-scale calibration drift across temperature and supply variation |
| Power Dissipation | 10 mW at 5 V / 100 kHz - balances speed and battery life in portable instrumentation |
| Operating Temp | –40°C to +85°C - qualified for industrial environments without derating |
Pinout & Package
ADS8344EG4 is packaged in QSOP-20 (DBQ), a 0.154-inch body width, 0.65mm pitch surface-mount package suitable for high-density PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 | Analog input channels | Eight configurable inputs supporting single-ended or differential acquisition; routed through internal multiplexer controlled by serial command |
| COM | Analog ground reference | Sets zero-code voltage in single-ended mode; connects to system AGND or bias point for differential offset control |
| SHDN | Shutdown enable | Active-low input that reduces quiescent current to <15 µW; essential for duty-cycled battery-powered logging |
| VREF | External reference input | Accepts 0.5 V to VCC; defines full-scale range (0 V to VREF); unbuffered, requiring low-impedance source |
| +VCC (Pins 12, 20) | Power supply | Dual power pins reduce IR drop and improve PSRR; supports 2.7–5 V operation with 1.5–2.0 mA quiescent current |
| GND (Pins 13, 14) | Analog/digital ground | Separate ground pins minimize noise coupling between analog and digital sections |
| DIN / DOUT | Serial data I/O | CMOS-compatible, over-voltage tolerant (to +5.5 V); DOUT tri-stated when CS is high for bus sharing |
| CS / DCLK / BUSY | Control and timing | Chip-select gated interface; DCLK synchronizes all transfers; BUSY indicates conversion or control-byte read state |
Key Features
| Feature | Design Value |
|---|---|
| On-chip 8-channel analog multiplexer | Eliminates external MUX and associated layout complexity; supports flexible channel sequencing via serial command |
| Configurable input mode (SGL/DIF) | Single-ended (8 ch) or differential (4 ch) operation selectable per conversion, enabling mixed-signal system reuse |
| Internal clock mode (PD1=1, PD0=0) | Offloads SAR timing generation from host MCU; allows asynchronous readout at any DCLK rate ≤2.0 MHz |
| Low-power shutdown (<15 µW) | Extends battery life in intermittent-sampling applications such as environmental sensors and portable DAQ |
| Over-voltage tolerant digital I/O | Withstands +5.5 V on DIN/DOUT/CS/DCLK regardless of +VCC, simplifying level-shifting in mixed-supply systems |
Applications
| Data Acquisition Systems | Test & Measurement Equipment |
|---|---|
Use Scenario: Multi-channel voltage logging in field-deployable environmental monitors with solar/battery hybrid power. IC Role / Device Role / Timing Role: Primary ADC capturing synchronized samples from thermocouples, RTDs, and pressure transducers at 10–100 kHz rates. Use Value: 16-bit resolution and 84 dB SINAD ensure accurate thermal drift tracking; QSOP-20 footprint enables compact sensor node PCBs. | Use Scenario: Portable oscilloscope front-end digitizing analog waveforms with variable gain and offset calibration. IC Role / Device Role / Timing Role: High-fidelity sampling engine with programmable input range (via VREF) and differential rejection of common-mode noise. Use Value: Channel-to-channel isolation >100 dB prevents crosstalk between probe inputs; 100 kHz throughput supports real-time waveform reconstruction. |
| Industrial Process Control | Battery-Powered Systems |
Use Scenario: PLC analog input module acquiring 4–20 mA loop signals and thermocouple outputs across 8 zones. IC Role / Device Role / Timing Role: Precision ADC with integrated multiplexer and robust ESD protection (per TI production data), operating in noisy factory environments. Use Value: ±0.05% gain error and –40°C to +85°C qualification ensure long-term accuracy without recalibration; dual GND pins suppress ground bounce. | Use Scenario: Handheld multimeter or PDA with multi-range DC/AC voltage, current, and resistance measurement. IC Role / Device Role / Timing Role: Core ADC providing flexible input scaling (via VREF), low standby current, and serial interface compatible with low-pin-count MCUs. Use Value: Shutdown mode draws <15 µW, extending coin-cell or Li-ion runtime; 2.7 V minimum supply enables operation down to near-end-of-life battery voltage. |
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 (not 8-channel); identical pinout except CH4–CH7 omitted; same QSOP-20 package | Reduced channel count suits simpler systems where only four analog sources require digitization | Select ADS8345IPW when board space and BOM cost must be minimized and 8-channel capability is unused |
| ADS8325IDRCT | 16-bit, 1-MSPS SAR ADC in VSSOP-10; no internal MUX; single-ended only; higher speed but no differential mode or shutdown | Targeted at high-speed single-channel applications like motor phase current sensing, not multi-channel DAQ | Choose ADS8325IDRCT only if throughput >100 kHz is mandatory and multiplexing is handled externally |
Compared with ADS8344EG4, ADS8345IPW offers identical performance in a reduced-channel variant with pin compatibility, while ADS8325IDRCT trades channel count and features for raw speed and smaller footprint-neither is pin-compatible, and both require PCB redesign for substitution.
Availability
ADS8344EG4 is available at Aetrix Electronics and suitable for data acquisition systems, industrial process controllers, and battery-powered portable instruments requiring stable component supply, extended temperature operation, and verified 16-bit precision.
Supply support for ADS8344EG4 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 ADS8344EG4 belongs to TI's precision SAR ADC product line, designed specifically for portable and multi-channel data acquisition where resolution, low power, and serial interface simplicity are prioritized over ultra-high speed.
FAQ
What is the maximum conversion rate supported by the ADS8344EG4?
The ADS8344EG4 supports a maximum throughput rate of 100 kHz under specified conditions (VCC = 5 V, fDCLK = 2.4 MHz). This corresponds to a minimum conversion time of 10 µs per sample, achievable using the external clock mode with proper timing alignment per Figure 3 in the SBAS139E datasheet. The internal clock mode maintains this rate but decouples DCLK from conversion timing.
Does the ADS8344EG4 support differential input mode, and how is it configured?
Yes, the ADS8344EG4 supports 4-channel differential input mode. Configuration is performed via the serial control byte: setting the SGL/DIF bit LOW and selecting channel pairs (e.g., CH0/CH4, CH1/CH5) using A2–A0 bits per Table II in the datasheet. In this mode, the device measures the voltage difference between two inputs, rejecting common-mode noise up to 100 dB.
What is the purpose of the COM pin on the ADS8344EG4, and how should it be connected?
The COM pin serves as the analog ground reference for single-ended inputs and the negative input reference for differential pairs. In single-ended mode, it must be connected to system AGND or a stable bias voltage to define the zero-code point. In differential mode, it is not used for signal routing but should remain tied to a clean ground plane to maintain analog integrity and minimize offset drift.
Can the ADS8344EG4 operate from a 3.3 V supply, and what performance changes occur?
Yes, the ADS8344EG4 is fully specified for 2.7 V to 5 V operation, including 3.3 V. At 3.3 V, typical power dissipation drops to ~5 mW at 100 kHz, and gain error remains ±0.05%. However, the absolute analog input range contracts to 0 V to VREF (max 3.3 V), and noise performance may degrade slightly due to reduced LSB size-verified in the +2.7 V electrical characteristics table of SBAS139E.
How does the shutdown mode function on the ADS8344EG4, and what is its power impact?
The ADS8344EG4 enters shutdown mode when the SHDN pin is driven LOW, reducing supply current to less than 15 µW. This state disables the internal reference buffer, analog front-end, and digital logic-retaining no register state. Recovery is immediate upon SHDN HIGH; the first conversion after exit is valid with no wake-up delay, making it ideal for burst-mode sampling in battery-powered ADS8344EG4 systems.
ADS8344EG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-SSOP (0.154", 3.90mm 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:
- -
ADS8344EG4 FAQ
1.How can I place an order for ADS8344EG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8344EG4 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 ADS8344EG4 reliable?
The price and inventory of ADS8344EG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8344EG4 is usually 5 days.
3.What payment methods are accepted for ADS8344EG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8344EG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8344EG4?
ADS8344EG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8344EG4 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 ADS8344EG4?
For technical support, including ADS8344EG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8344EG4 requirements.
6.How does Aetrix verify that ADS8344EG4 is sourced from the original manufacturer or authorized distributors?
All ADS8344EG4 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 ADS8344EG4 meets industry standards.
7.What is the process for return or replacement of ADS8344EG4?
All ADS8344EG4 units undergo pre-shipment inspection (PSI). If there is an issue with ADS8344EG4, 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 ADS8344EG4 part is unused and in its original packaging.
Return procedure for ADS8344EG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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