My Inquiry
My Account
Texas Instruments ADS8344EB
- Part No.:
- ADS8344EB
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
ADS8344EB.pdf
- Description:
- IC ADC 16BIT SAR 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:186
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADS8344EB from Texas Instruments is a 16-bit, 8-channel SAR analog-to-digital converter with serial interface, ±0.024% gain error, 100kHz throughput rate, and QSOP-20 package - designed for precision data acquisition in battery-powered test equipment and industrial process control systems.
For engineers reviewing the ADS8344EB datasheet, ADS8344EB pinout, ADS8344EB application, or ADS8344EB equivalent, key selection considerations include its 8-channel single-ended/differential input flexibility, 2.7V–5V single-supply operation, 84dB SINAD at 10kHz, low-power shutdown mode (<15µW), and compatibility with isolated serial interfaces in remote sensing applications.
Technical Context
The ADS8344EB implements a capacitive redistribution SAR architecture with integrated sample-and-hold, enabling precise 16-bit conversion 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 4-wire synchronous serial protocol (CS, DCLK, DIN, DOUT) with BUSY signaling and configurable clock modes - external clock (24-cycle conversion) or internal clock (8µs max conversion time, asynchronous readout). Reference voltage range is 0.5V to VCC, directly scaling full-scale input span and LSB size (e.g., 76µV at 5V VREF).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 discrete output codes for high-fidelity signal digitization. |
| Throughput Rate | 100kHz - enables real-time sampling of fast transients in test and measurement systems. |
| Gain Error | ±0.024% - ensures accurate amplitude scaling across temperature (–40°C to +85°C). |
| SINAD | 84dB at 10kHz - supports >13.6 effective number of bits (ENOB) for clean spectral performance. |
| Supply Range | 2.7V to 5V - allows direct integration into 3.3V or 5V embedded systems without level-shifting. |
| Power Dissipation | 5mW typical at 100kHz/2.7V - extends battery life in portable PDA and data logger applications. |
| Shutdown Current | <15µW - reduces standby power by >99.9% during idle intervals in cyclic acquisition systems. |
Pinout & Package
ADS8344EB is housed in a QSOP-20 (DBQ) package - 0.64mm pitch, 7.2mm × 4.4mm body, gull-wing leads - optimized for high-density PCB layouts while maintaining thermal and ESD robustness per TI's production-grade qualification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 | Analog Input Channels | Eight independent inputs configurable as single-ended (vs. COM) or differential pairs (e.g., CH0/CH4); support multiplexed scanning without external switches. |
| COM | Analog Ground Reference | Sets zero-code voltage in single-ended mode; must be connected to system ground or stable reference point to avoid offset drift. |
| SHDN | Active-Low Shutdown Control | Pulls device into sub-15µW state when driven LOW; resumes full operation within microseconds on HIGH transition - no wake-up delay. |
| VREF | External Reference Input | Unbuffered input accepting 0.5V–VCC; defines full-scale range (0V to VREF) and LSB weight (e.g., 76µV at 5V); requires local 1µF bypassing. |
| +VCC, GND | Power Supply Terminals | Dual +VCC pins (pins 12 & 20) and dual GND pins (13 & 14) reduce supply impedance and improve PSRR in noisy environments. |
| CS, DCLK, DIN, DOUT | Serial Interface Signals | CMOS-compatible 4-wire interface; DOUT is tri-stated when CS = HIGH, enabling bus sharing; BUSY indicates conversion status independently of CS. |
| BUSY | Conversion Status Output | Active-LOW open-drain signal asserting during control byte latching and conversion; remains LOW for entire 8µs internal-clock cycle. |
Key Features
| Feature | Design Value |
|---|---|
| Pin-for-pin compatibility with ADS7844 | Enables drop-in upgrade path from 12-bit to 16-bit resolution without PCB redesign or firmware changes. |
| Configurable input topology | Single-ended (8 ch) or differential (4 ch) selection via SGL/DIF bit - eliminates need for external instrumentation amplifiers in mixed-signal systems. |
| Internal clock mode | Removes dependency on microcontroller clock generation; allows flexible readout timing and simplifies timing-critical firmware design. |
| Channel-to-channel isolation | 100dB at 10kHz - prevents crosstalk between adjacent channels during simultaneous multi-point monitoring in industrial sensors. |
| Low-noise reference interface | Input current ≤40µA at 2.7V VREF - permits use of low-power bandgap references (e.g., REF3025) without buffer amplifiers. |
Applications
| Portable Data Loggers | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Multi-channel environmental monitoring (temperature, pressure, humidity) in field-deployed units powered by Li-ion batteries. IC Role / Device Role / Timing Role: Primary ADC capturing synchronized samples from 8 sensor front-ends; internal clock mode decouples sampling from host MCU timing constraints. Use Value: 5mW typical power at 100kHz and <15µW shutdown enable >1-year battery life; 84dB SINAD preserves dynamic range across sensor bandwidths up to 10kHz. |
Use Scenario: Analog input module in PLC I/O rack acquiring signals from 4–20mA transmitters and RTD bridges. IC Role / Device Role / Timing Role: High-accuracy digitizer with programmable gain and offset calibration; differential mode rejects common-mode noise on long sensor cables. Use Value: ±0.024% gain error and 100dB channel isolation ensure traceable metrology-grade measurements; QSOP-20 footprint fits standard 25mm pitch I/O card layouts. |
| Handheld Test Equipment | Battery-Powered Medical Devices |
|
Use Scenario: Portable oscilloscope or multimeter with 8-channel voltage/current inputs and real-time FFT analysis. IC Role / Device Role / Timing Role: Core sampling engine providing 100kHz sustained throughput across all channels; serial interface enables galvanic isolation via digital optocouplers. Use Value: 24-cycle external clock mode supports deterministic timing for trigger-aligned acquisitions; 84dB SINAD meets Class II handheld instrument accuracy requirements. |
Use Scenario: Wearable vital sign monitor (ECG, SpO₂, respiration) requiring ultra-low power and high SNR in compact form factor. IC Role / Device Role / Timing Role: Low-noise analog front-end digitizer; shutdown mode activated between heartbeat cycles to minimize average current draw. Use Value: 16-bit resolution resolves microvolt-level ECG signals; 2.7V operation matches single-cell battery voltage; QSOP-20 eases routing in space-constrained flex PCBs. |
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 |
|---|---|---|---|
| ADS8344N | SSOP-20 package; ±0.05% gain error (vs. ADS8344EB's ±0.024%); same electrical specs otherwise. | Preferred for cost-sensitive industrial modules where 0.026% gain error margin is acceptable and SSOP-20 thermal profile suits convection-cooled enclosures. | Select ADS8344N when board space allows SSOP-20 and tighter gain accuracy is not required for calibration budget. |
| ADS8345 | Same QSOP-20 package; adds internal reference (2.5V); removes VREF pin; gain error ±0.03%; 85dB SINAD. | Used in systems lacking precision external references; trades reference flexibility for simplified BOM and layout - no external VREF filter needed. | Choose ADS8345 if eliminating external reference components outweighs loss of VREF programmability and slight SINAD reduction. |
Compared with ADS8344N and ADS8345, the ADS8344EB provides the highest DC accuracy (±0.024% gain error) in the QSOP-20 footprint, making it optimal for applications requiring minimal post-calibration trim - especially where VREF is actively controlled for range adaptation or ratiometric sensing.
Availability
ADS8344EB is available at Aetrix Electronics and suitable for portable data loggers, industrial PLC analog input modules, and handheld test equipment requiring stable component supply, long-term lifecycle support, and guaranteed TI production-grade quality.
Supply support for ADS8344EB 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 reliability.
The ADS8344EB belongs to TI's precision SAR ADC product line, engineered for high-resolution, low-power, multi-channel data acquisition in battery-operated and noise-sensitive environments - emphasizing accuracy, flexibility, and ease of system integration.
FAQ
What is the maximum conversion rate supported by the ADS8344EB?
The ADS8344EB supports a maximum throughput rate of 100kHz, achieved with a 2.4MHz external clock (fDCLK = 24 × fSAMPLE). This rate is fully specified over the –40°C to +85°C temperature range and at both 2.7V and 5V supply voltages, ensuring consistent real-time performance in demanding industrial and portable applications. The ADS8344EB maintains 84dB SINAD even at this maximum rate.
Does the ADS8344EB require an external reference voltage?
Yes, the ADS8344EB requires an external reference voltage applied to the VREF pin. It accepts any stable voltage from 0.5V to +VCC (2.7V–5V), which directly sets the full-scale input range (0V to VREF). The device does not include an internal reference; using a precision external reference (e.g., REF3025) is essential to achieve its ±0.024% gain error specification and maintain measurement traceability.
How does the ADS8344EB handle differential versus single-ended inputs?
The ADS8344EB configures its 8-channel multiplexer via the SGL/DIF control bit and A2–A0 address bits: when SGL/DIF = HIGH, it operates in single-ended mode (CH0–CH7 referenced to COM); when LOW, it pairs channels as differential inputs (e.g., CH0/CH4, CH1/CH5). This is implemented entirely in hardware - no external op-amps or resistor networks are needed - and is selected dynamically per conversion via the serial control byte.
What power-saving features does the ADS8344EB offer?
The ADS8344EB offers two complementary low-power modes: (1) SHDN pin assertion reduces quiescent current to <15µW, and (2) PD1/PD0 bits enable auto power-down between conversions (PD1=PD0=0), cutting average current to ~3µA at 100kHz. Both modes resume full operation in microseconds - critical for burst-mode sensing in battery-powered ADS8344EB applications like portable medical monitors.
Is the ADS8344EB pin-compatible with other devices in the ADS834x family?
Yes, the ADS8344EB is pin-for-pin compatible with the ADS7844 (12-bit predecessor) and shares identical QSOP-20 pinout with ADS8344E/N variants. However, it is not pin-compatible with ADS8345 (which replaces VREF with internal reference) or ADS8343/ADS8341 (different channel counts and packages). Always verify package designation (DBQ for QSOP-20) and ordering suffix (/2K5) to ensure mechanical and electrical interchangeability.
ADS8344EB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-SSOP (0.154", 3.90mm Width)
- Packaging:
- Bulk
- 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:
- -
ADS8344EB FAQ
1.How can I place an order for ADS8344EB through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8344EB 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 ADS8344EB reliable?
The price and inventory of ADS8344EB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8344EB is usually 5 days.
3.What payment methods are accepted for ADS8344EB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8344EB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8344EB?
ADS8344EB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8344EB 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 ADS8344EB?
For technical support, including ADS8344EB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8344EB requirements.
6.How does Aetrix verify that ADS8344EB is sourced from the original manufacturer or authorized distributors?
All ADS8344EB 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 ADS8344EB meets industry standards.
7.What is the process for return or replacement of ADS8344EB?
All ADS8344EB units undergo pre-shipment inspection (PSI). If there is an issue with ADS8344EB, 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 ADS8344EB part is unused and in its original packaging.
Return procedure for ADS8344EB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADS8344EB Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
