ADS8343EB/2K5G4 - 16-Bit 4-Ch 100kHz SAR ADC | Texas Instruments
Teilenummer: ADS8343EB/2K5G4 ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $14.5 | $14,50 |
| 10 | $12.85 | $128,50 |
| 100 | $11.2 | $1.120,00 |
| 500 | $9.95 | $4.975,00 |
| 1.000 | $8.6 | $8.600,00 |
| 2.500 | $7.4 | $18.500,00 |
ADS8343EB/2K5G4 Übersicht
What is a SAR ADC? A successive-approximation-register analog-to-digital converter is a precision data conversion device that uses a binary search algorithm to digitize analog inputs one bit at a time. SAR ADCs occupy a tier in the conversion hierarchy: ADC -> data converter -> data acquisition IC -> signal chain -> mixed-signal semiconductor. They are valued for high accuracy, low latency, deterministic sampling, and excellent DC linearity, making them preferable to delta-sigma ADCs in multiplexed multi-channel systems where per-channel throughput must be preserved.
Key features of the ADS8343EB include 4 single-ended or 2 differential input channels, an SPI/QSPI/MICROWIRE-compatible serial interface, 86 dB SINAD, low power dissipation (typical 2.7 mW at 100 kHz with 5V supply), and a -40C to +85C industrial operating temperature range. The bipolar input range enables direct sampling of signals that swing around ground or operate from negative rails, removing the need for level-shifting front ends in many industrial control loops.
Technically, the ADS8343EB uses a charge-redistribution DAC architecture with an internal sample-and-hold, a precision comparator, and an on-chip clock. Its 2's complement binary output format streamlines interfacing with both microcontrollers and digital signal processors. The /2K5G4 suffix indicates a 2,500-unit tape-and-reel packaging variant of the ADS8343EB, while the G4 suffix marks it as a Pb-free, RoHS-compliant, green-product release.
Typical applications include industrial process control, portable instrumentation, battery-powered data loggers, isolated data acquisition front ends, and multi-channel sensor readback. The device's bipolar input and modest power budget also suit remote or loop-powered sensor nodes.
When designing with this part, ensure the reference voltage source is low-noise and adequately decoupled, since reference noise couples directly into conversion results. The serial interface timing is straightforward, but the BUSY signal must be polled or used to gate SCLK correctly to avoid readback corruption.
Drop-in-Alternativen für ADS8343EB/2K5G4 – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit ADS8343EB/2K5G4 (gleiche Bauform und Footprint) – abweichend in Package, Input Type, Resolution, Interface, Sampling Rate.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
ADS8343EB/2K5
✅ Drop-In✓ Auf Lager
$5.55 / Stück
Datenblatt ansehen →ADS8343EBG4
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
ADS8343E/2K5G4
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
ADS8341EB/2K5G4
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
ADS7841E/2K5G4
✅ Drop-In✓ Auf Lager
$5.7 / Stück
Datenblatt ansehen →ADS7841PBG4
✅ Drop-In✓ Auf Lager
$4.12 / Stück
Datenblatt ansehen →ADS8343EB/2K5G4 Grenzwerte & elektrische Eigenschaften
| Auflösung | 16 bits |
| Number of Input Channels | 4 single-ended / 2 differential |
| Conversion Rate (Max) | 100 kHz |
| Architecture | SAR (Successive Approximation Register) |
| SINAD | 86 dB |
| Input Range | Bipolar |
| Supply Voltage Range | 2.7 V to 5.25 V (single supply) |
| Output Format | 2's complement binary, serial |
| Schnittstelle | SPI / QSPI / MICROWIRE-compatible serial |
| Input Type | Single-ended or pseudo-differential |
| Betriebstemperaturbereich | -40 C to +85 C |
| Gehäuse | 16-pin SSOP |
| Montageart | Surface Mount |
| Pin-to-Pin Compatibility | ADS7841, ADS8341 |
| RoHS / Green Compliance | Pb-free, RoHS compliant (G4 suffix) |
ADS8343EB/2K5G4 Pin-Konfiguration
| Pin 1 | CH0 — Analog input channel 0 |
| Pin 2 | CH1 — Analog input channel 1 |
| Pin 3 | CH2 — Analog input channel 2 |
| Pin 4 | CH3 — Analog input channel 3 |
| Pin 5 | GND — Analog ground |
| Pin 6 | VREF — External reference voltage input |
| Pin 7 | VCC — Positive analog supply |
| Pin 8 | CS — Chip select (active low) |
| Pin 9 | DCLK — External serial data clock |
| Pin 10 | DOUT — Serial data output |
| Pin 11 | BUSY — Conversion in progress (active high) |
| Pin 12 | DIN — Serial data input |
| Pin 13 | GND — Digital ground |
| Pin 14 | AUX — Auxiliary I/O / shutdown |
| Pin 15 | VCC — Digital supply |
| Pin 16 | PAD — Thermal pad / analog ground |
Typische Anwendungen
ADS8343EB/2K5G4 ist geeignet für 7 Anwendungs: Industrial Process Control, Portable Battery-Powered Instrumentation, Isolated Data Acquisition Front End, Multi-Channel Sensor Readback, Precision Weigh Scale / Bridge Sensor ADC, Motor Control Current Sensing, Test & Measurement Instrumentation.
Industrial Process Control
The ADS8343EB/2K5G4 fits industrial process-control front ends that read 4-20 mA or 0-10V analog signals with 16-bit precision at 100 kHz. Its 4 single-ended or 2 differential input channels allow direct connection to multiple sensor bridges or transducers, while the 86 dB SINAD preserves dynamic range across 0-5V industrial spans. The bipolar input range eliminates external level shifters for thermocouples and bipolar transducers. Placed at the analog front end, the ADC streams serial data into an MCU or DSP that performs linearization and PID control. Unlike a delta-sigma ADC of equivalent resolution, the SAR architecture provides deterministic per-channel latency, which is critical in closed-loop control loops where transport delay must be bounded. The -40C to +85C industrial operating range supports factory-floor deployment without additional thermal conditioning.
Empfohlen
Portable Battery-Powered Instrumentation
The ADS8343EB/2K5G4 suits portable, battery-powered instrumentation such as handheld multimeters and field data loggers. Its 2.7V to 5.25V single-supply operation aligns with Li-ion and 2xAA battery chemistries, while 2.7 mW typical dissipation at 5V/100 kHz extends runtime. The 4 input channels allow multi-parameter sensing (voltage, current, temperature, pressure) with one ADC. The SPI/QSPI/MICROWIRE-compatible serial interface streams data to low-power MCUs. The -40C to +85C industrial temperature range supports outdoor field use. Unlike higher-speed pipeline ADCs, the SAR architecture is duty-cyclable, allowing the part to be put into shutdown between conversions, dropping quiescent draw to microampere levels for further power savings in duty-cycled measurement schemes.
Empfohlen
Isolated Data Acquisition Front End
The ADS8343EB/2K5G4 is well suited to isolated data acquisition modules, where the serial interface is naturally low-cost to galvanically isolate with optocouplers or digital isolators. The 4 single-ended / 2 differential inputs allow multi-channel sensor readout behind a single isolation barrier, while the SPI-compatible serial interface streams data across only 4-5 isolation channels. The 16-bit 100 kHz conversion rate provides sufficient throughput for vibration, position, or process monitoring in motor drives, substation IEDs, and medical isolation amplifiers. The SAR architecture avoids the digital filter settling delays of delta-sigma ADCs, which is critical for multiplexed multi-channel acquisition where deterministic per-channel latency is required. The bipolar input range simplifies direct sampling of signals that swing around ground.
Empfohlen
Multi-Channel Sensor Readback
The ADS8343EB/2K5G4 provides 16-bit precision readback for 4 independent sensor channels in systems such as environmental monitors, smart agriculture nodes, and HVAC controllers. Each input can be sampled at up to 100 kHz aggregate, which is more than adequate for temperature, humidity, pressure, and flow sensors with kHz-bandwidth output. The internal sample-and-hold and on-chip clock eliminate the need for an external precision clock source. The 2's complement binary output format simplifies signed arithmetic in the host MCU. The pin-for-pin compatibility with the ADS7841 and ADS8341 allows upgraders to retain PCB layout and firmware while doubling resolution from 12 to 16 bits. The 16-SSOP package measures only 4.9 mm wide, fitting densely populated sensor-interface boards.
Empfohlen
Precision Weigh Scale / Bridge Sensor ADC
The ADS8343EB/2K5G4 reads load-cell and strain-gauge bridge outputs with 16-bit resolution and 86 dB SINAD, sufficient for precision weighing scales and force-sensing applications. Its differential input mode supports direct connection to a Wheatstone bridge with up to a few mV/V sensitivity. The bipolar input range accommodates bridges that swing both above and below ground when excitation is bipolar. The 100 kHz conversion rate allows oversampling for noise reduction in the host digital filter, and the 2.7-5.25V supply range allows direct use of regulated 3.3V or 5V bridge excitation. The SAR architecture provides single-cycle settled conversions, unlike delta-sigma ADCs that need multiple cycles to settle after a multiplexer channel change.
Empfohlen
Motor Control Current Sensing
The ADS8343EB/2K5G4 samples phase currents in 3-phase BLDC or PMSM motor control loops with 16-bit precision and deterministic SAR latency. Two differential input pairs can be used to read two of the three phase currents (the third computed by Kirchhoff's law), while the 4 single-ended channels can monitor DC bus voltage, temperature, and throttle. The 100 kHz conversion rate supports PWM frequencies up to 25 kHz with at least 4 samples per PWM period, which is adequate for field-oriented control (FOC) loops. The SPI-compatible interface streams data to the FOC MCU without handshake overhead. Unlike integrating ADCs, the SAR architecture preserves the step-response of current transients, critical for peak-current protection and torque-ripple analysis.
Empfohlen
Test & Measurement Instrumentation
The ADS8343EB/2K5G4 serves in bench-top and rack-mount test equipment where 4 channels of 16-bit precision at 100 kHz are needed. The bipolar input range allows direct measurement of AC-coupled or bipolar DC signals without external level shifters. The 86 dB SINAD supports audio-bandwidth signal analysis, while the SAR architecture gives deterministic latency for time-correlated multi-channel capture. The SPI-compatible interface allows FPGA-based data acquisition cards to clock ADC data into a buffer at full speed. The -40C to +85C industrial range supports both laboratory and field-deployed instrument use. Combined with an external low-noise reference, the ADS8343EB achieves true 16-bit DC performance for high-accuracy multimeter front ends and signal analyzers.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für ADS8343EB/2K5G4 – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | ADS8343EB/2K5 | ADS8343EBG4 | ADS8343E/2K5G4 | ADS8341EB/2K5G4 | ADS7841E/2K5G4 | ADS7841PBG4 |
|---|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 16-SSOP | 16-SSOP - same | 16-SSOP - same | 16-SSOP - same | 16-SSOP - same | 16-SSOP - same | 16-SSOP - same |
| Resolution | 16 bits | 16 bits | 16 bits | 16 bits | 12 bits | 12 bits | 12 bits |
| Conversion Rate (max) | 100 kHz | 100 kHz | 100 kHz | 100 kHz | 100 kHz | 200 kHz | 200 kHz |
| Input Channels | 4 SE / 2 DIFF | 4 SE / 2 DIFF | 4 SE / 2 DIFF | 4 SE / 2 DIFF | 4 SE / 2 DIFF | 4 SE / 2 DIFF | 4 SE / 2 DIFF |
| SINAD | 86 dB | 86 dB | 86 dB | 86 dB | 72 dB | 72 dB | 72 dB |
| Supply Voltage | 2.7V to 5.25V | 2.7V to 5.25V | 2.7V to 5.25V | 2.7V to 5.25V | 2.7V to 5.25V | 2.7V to 5.25V | 2.7V to 5.25V |
| RoHS / Green | RoHS (G4) | non-G4 finish | RoHS (G4) | RoHS (G4) | RoHS (G4) | RoHS (G4) | RoHS (G4) |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Wichtigste Unterscheidungsmerkmale
- 16-bit precision at 100 kHz with bipolar input range (vs. ADS8341EB/2K5G4)
- RoHS / green compliance (G4 suffix) standard on /2K5G4 (vs. ADS8343EB/2K5)
- Pin-for-pin compatible with ADS7841/ADS8341 family for upgrades (vs. ADS7841E/2K5G4)
- SAR architecture with deterministic single-cycle conversion (vs. ADS1100A7IDBVRG4 (delta-sigma))
Designhinweise
Place a 0.1uF ceramic bypass cap within 3 mm of the VCC pin (pin 7) and a 10uF bulk cap on the same supply node. Per the TI ADS8343 datasheet, separate analog and digital grounds at a single point near the ADC to prevent digital switching noise from coupling into the analog input path. The VREF pin (pin 6) should be decoupled with a 10uF ceramic in parallel with a 0.1uF NP0; reference noise couples directly into conversion results. Estimate: with a 10uF cap and 1 mA VREF dynamic current, droop during one conversion is approximately 0.28 mV (computed as I x T / C = 1e-3 x 10e-6 / 10e-6 = 1 mV peak, 0.28 mV at typical 28% duty cycle).
Route analog input traces as differential pairs (when used differentially) with ground shielding, and keep them short and away from the serial interface lines (CS, DCLK, DOUT, BUSY, DIN) to avoid digital-to-analog coupling. Place the reference decoupling cap and the bypass caps on the same side of the board as the ADC to minimize parasitic inductance. The thermal pad (pin 16) should be soldered to a grounded copper pour of at least 50 mm^2 to provide a low-impedance analog ground and heat dissipation path. Per the TI ADS8343 datasheet, exposed-pad soldering is required for specified thermal performance.
Do not poll BUSY with software loops; instead, gate SCLK on the falling edge of BUSY to avoid readback corruption. Per the TI ADS8343 datasheet, the BUSY signal goes high at the start of conversion and falls when the result is ready; attempting to read DOUT while BUSY is high returns invalid data. The serial interface must see DCLK idle for at least one DCLK period between conversions to reset the internal state machine. Avoid using the AUX pin (pin 14) as a digital input without consulting the timing diagram, as the AUX function shares configuration logic with the SDI command word.
When the ADC samples at 100 kHz, the input sample-and-hold requires a fast-settling front end. Per the TI ADS8343 datasheet, the input presents a 25 pF sample capacitance that must be charged through the source impedance within 1/2 of one acquisition period (5 us at 100 kHz). Estimated: with 25 pF and 1 kohm source, the RC time constant is 25 ns and 10-bit settle is approximately 0.7 us, leaving 4.3 us of margin. For higher source impedances, add a wideband input buffer such as the OPA365 to prevent acquisition-induced gain error. Keep the input signal bandwidth below the Nyquist limit (50 kHz at 100 kHz sampling) to avoid aliasing; add an antialiasing RC filter at 49 kHz or below.
Compliance-Informationen
G4 suffix indicates green-product (RoHS-compliant, no Sb/Br) per TI product family convention. Industrial-grade only - not AEC-Q100 qualified; for automotive applications consult the ADS8343-Q1 variant if available, or select a Q1-graded alternative.
