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Texas Instruments ADS8343EB
- Part No.:
- ADS8343EB
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
ADS8343EB.pdf
- Description:
- IC ADC 16BIT SAR 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
ADS8343EB from Texas Instruments is a 16-bit, 4-channel SAR analog-to-digital converter with serial interface, bipolar input range (±VREF), and up to 100kHz throughput. It operates from a single 2.7V–5V supply, features onboard multiplexer, shutdown mode (<15µW), and SSOP-16 package. It is used in portable data loggers and battery-powered test equipment requiring high-resolution sampling with low power.
For engineers reviewing the ADS8343EB datasheet, ADS8343EB pinout, ADS8343EB application, or ADS8343EB equivalent, key selection criteria include integral linearity error (±6 LSB), 86dB SINAD at 10kHz, 2.4MHz max external clock support, and compatibility with single-ended or differential input configurations across –40°C to +85°C.
Technical Context
The ADS8343EB implements a capacitive redistribution SAR architecture with integrated sample-and-hold, supporting both internal and external clock modes. Its 4-channel analog multiplexer enables flexible input routing-either 4 single-ended channels referenced to COM or 2 differential pairs (CH0/CH1, CH2/CH3).
Digital control uses an 8-bit command byte (S-A2-A1-A0-SGL/DIF-PD1-PD0) for channel selection, input mode, and power-down configuration. The device outputs binary two's complement data via DOUT synchronized to DCLK falling edges, with BUSY indicating conversion status.
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 portable instrumentation and industrial monitoring. |
| Integral Linearity Error | ±6 LSB (max) - ensures monotonicity and accurate end-point calibration over full temperature range. |
| SINAD | 86 dB at 10 kHz - enables >14 ENOB for clean signal digitization in noise-sensitive environments. |
| Supply Range | 2.7 V to 5 V - allows direct integration into both 3.3 V and 5 V systems without level-shifting. |
| Reference Range | 0.5 V to VCC/2 - permits scalable input spans (e.g., ±1.25 V at 2.7 V supply, ±2.5 V at 5 V supply). |
| Power Dissipation | 5 mW typical at 2.7 V / 100 kHz - extends battery life in handheld PDA and field data acquisition units. |
Pinout & Package
ADS8343EB is housed in a 16-pin SSOP (DBQ) package with 0.65 mm pitch, optimized for compact PCB layouts in space-constrained portable systems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +VCC (Pins 1, 9) | Power supply input | Dual power pins reduce IR drop and improve PSRR; accepts 2.7–5 V with specified performance across full range. |
| CH0–CH3 (Pins 2–5) | Analog input channels | Four single-ended inputs; configurable as differential pairs (e.g., CH0/CH1) when SGL/DIF = LOW. |
| COM (Pin 6) | Common-mode reference | Serves as return for single-ended inputs or negative leg in differential mode; typically tied to VREF. |
| SHDN (Pin 7) | Shutdown control | Active-low input; reduces quiescent current to <3 µA when asserted, enabling ultra-low-power sleep states. |
| VREF (Pin 8) | External reference voltage | Unbuffered input; sets full-scale span (±VREF); requires low-noise source due to 13–40 µA input current. |
| GND (Pins 10, 11) | Analog/digital ground | Dual ground pins separate analog return path from digital switching noise, improving SNR. |
| DOUT (Pin 12) | Serial data output | High-impedance when CS = HIGH; outputs MSB-first two's complement code on DCLK falling edge. |
| BUSY (Pin 13) | Conversion status indicator | Active-high pulse signals ongoing conversion; synchronizes host read timing without polling overhead. |
| DIN (Pin 14) | Serial data input | Latches 8-bit control byte on DCLK rising edge; includes start bit (S), channel select (A2–A0), and mode bits. |
| CS (Pin 15) | Chip select | Enables serial interface and initiates conversion sequence; must be held LOW during full 24-clock cycle. |
| DCLK (Pin 16) | Serial clock input | Drives data I/O and (in external mode) controls SAR conversion timing; max 2.4 MHz for 100 kHz throughput. |
Key Features
| Feature | Design Value |
|---|---|
| Pin-for-pin compatibility with ADS7841 and ADS8341 | Enables drop-in replacement or design reuse across TI's 12-bit and 16-bit SAR ADC families without layout change. |
| Bipolar input range (±VREF) | Supports true differential or offset-referenced single-ended measurements without external op-amp level shifting. |
| Configurable power-down modes | Three selectable modes (always-on, auto power-down, internal clock) allow fine-grained trade-off between latency and power. |
| Channel-to-channel isolation >100 dB | Minimizes crosstalk in multi-sensor systems, preserving accuracy when scanning multiple analog sources. |
| Onboard 4-channel multiplexer | Reduces external component count and board area versus discrete ADC + MUX solutions in compact DAQ designs. |
Applications
| Portable Data Logger | Industrial Sensor Interface |
|---|---|
|
Use Scenario: Battery-powered environmental monitor logging temperature, humidity, and pressure from four analog sensors. IC Role / Device Role / Timing Role: 4-channel SAR ADC performing time-multiplexed sampling at 10–100 Hz with automatic shutdown between reads. Use Value: 16-bit resolution captures subtle sensor drift; 5 mW power at 2.7 V extends runtime beyond 12 months on AA batteries. |
Use Scenario: PLC analog input module conditioning signals from RTDs, strain gauges, and 4–20 mA transmitters. IC Role / Device Role / Timing Role: Precision front-end ADC with programmable gain and bipolar range for unified sensor signal digitization. Use Value: ±6 LSB INL and 86 dB SINAD ensure compliance with IEC 61000-4-3 immunity requirements for industrial EMC. |
| Handheld Test Equipment | Medical Vital Sign Monitor |
|
Use Scenario: Portable oscilloscope/multimeter hybrid acquiring waveform data from probe inputs with user-selectable ranges. IC Role / Device Role / Timing Role: High-speed sampling ADC with differential input support for noise rejection in unshielded handheld enclosures. Use Value: 100 kHz throughput and 100 dB channel isolation enable simultaneous capture of ECG and respiration waveforms without interference. |
Use Scenario: Wearable patient monitor measuring biopotentials (ECG, EMG) and physiological parameters (SpO₂, NIBP). IC Role / Device Role / Timing Role: Low-noise, low-power ADC converting analog biosignals with minimal thermal drift over body temperature range. Use Value: 81–86 dB SINAD at 1–10 kHz and <1 µVrms noise meet AAMI EC11 clinical accuracy thresholds for diagnostic-grade 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 |
|---|---|---|---|
| ADS8341 | 16-bit, 2-channel, same SSOP-16 package and pinout; lacks CH2/CH3 and COM pin; no differential mode support. | Restricted to dual-input systems (e.g., voltage/current pair); unsuitable for 4-sensor data loggers. | Select ADS8341 only when channel count and differential capability are unnecessary and BOM cost reduction is critical. |
| ADS7841 | 12-bit, 4-channel, pin-compatible but lower resolution; 1 LSB = 1.22 mV at 5 V vs. 76 µV for ADS8343EB; higher missing-code risk (12-bit vs. 15-bit no-missing-codes). | Acceptable for non-critical industrial monitoring where 12-bit ENOB suffices; not suitable for precision medical or metrology use. | Choose ADS7841 when system-level accuracy tolerances exceed ±20 mV and total harmonic distortion >–70 dB is acceptable. |
Compared with ADS8341 and ADS8341, the ADS8343EB delivers 4-bit higher resolution, 15-bit guaranteed no-missing-codes operation, and full differential input flexibility-making it the only option among the three qualified for battery-powered precision data acquisition demanding >14 ENOB.
Availability
ADS8343EB is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor interfaces, and medical vital sign monitors requiring stable component supply and long-term manufacturability.
Supply support for ADS8343EB 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 connectivity technologies, with decades of expertise in precision data converters.
The ADS8343EB belongs to TI's precision SAR ADC product line, engineered for high-resolution, low-power, multi-channel data acquisition in portable and industrial systems operating across extended temperature ranges.
FAQ
What is the maximum sampling rate supported by the ADS8343EB?
The ADS8343EB supports a maximum throughput rate of 100 kHz under specified conditions (fCLK = 2.4 MHz, VCC = 2.7–5 V, TA = –40°C to +85°C). This requires 24 clock cycles per conversion, including acquisition, SAR decision, and serial data transfer. At lower clock frequencies or higher temperatures, the achievable rate may decrease due to timing margin constraints.
Does the ADS8343EB support differential input mode?
Yes, the ADS8343EB supports differential input mode via its 4-channel multiplexer. When the SGL/DIF bit is set LOW in the control byte, pairs CH0/CH1 and CH2/CH3 become differential inputs. Each pair delivers a full-scale span of ±VREF, with channel-to-channel isolation exceeding 100 dB at 50 kHz, ensuring minimal crosstalk in multi-signal acquisition.
How does the reference voltage affect the ADS8343EB's effective resolution?
The ADS8343EB's LSB size scales linearly with VREF (LSB = VREF / 65,536). At VREF = 2.5 V, LSB = 76 µV; at VREF = 1.25 V, LSB = 38 µV. However, internal noise (~20 µVrms) dominates below ~1.5 V reference, reducing stable ENOB. Thus, while resolution remains 16-bit, usable ENOB drops from ~14.2 bits (at 2.5 V) to ~13.2 bits (at 1.25 V) per typical characteristics.
What power-down modes are available on the ADS8343EB?
The ADS8343EB offers three power-down configurations controlled by PD1/PD0 bits: (1) always-on (PD1=PD0=1), (2) auto power-down between conversions (PD1=PD0=0), and (3) internal clock mode (PD1=1, PD0=0). In auto power-down, supply current drops to <3 µA between conversions, with zero wake-up latency-the first conversion after wake-up is fully valid with no settling delay.
Is the ADS8343EB pin-compatible with other TI ADCs?
Yes, the ADS8343EB is explicitly pin-for-pin compatible with the ADS7841 (12-bit, 4-channel) and ADS8341 (16-bit, 2-channel) in the SSOP-16 (DBQ) package. Pin mapping for power, ground, reference, control, and serial I/O is identical. However, ADS8343EB adds CH2, CH3, and COM pins-unused pins on ADS8341 must be left floating or tied appropriately per target design.
ADS8343EB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 100k
- Number of Inputs:
- 2, 4
- 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:
- 16-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS8343EB FAQ
1.How can I place an order for ADS8343EB through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8343EB 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 ADS8343EB reliable?
The price and inventory of ADS8343EB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8343EB is usually 5 days.
3.What payment methods are accepted for ADS8343EB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8343EB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8343EB?
ADS8343EB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8343EB 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 ADS8343EB?
For technical support, including ADS8343EB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8343EB requirements.
6.How does Aetrix verify that ADS8343EB is sourced from the original manufacturer or authorized distributors?
All ADS8343EB 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 ADS8343EB meets industry standards.
7.What is the process for return or replacement of ADS8343EB?
All ADS8343EB units undergo pre-shipment inspection (PSI). If there is an issue with ADS8343EB, 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 ADS8343EB part is unused and in its original packaging.
Return procedure for ADS8343EB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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