ISL26310FBZ - 12-bit 125kSPS SAR ADC | Renesas
Teilenummer: ISL26310FBZ ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $6.95 | $6,95 |
| 10 | $6.1 | $61,00 |
| 100 | $5.18 | $518,00 |
| 500 | $4.3 | $2.150,00 |
| 1.000 | $3.65 | $3.650,00 |
ISL26310FBZ Übersicht
A SAR ADC is a successive-approximation-register analog-to-digital converter. It uses a binary search algorithm and an internal precision DAC to compare the sampled input against a reference voltage, producing a digital code in N conversion cycles for an N-bit result. SAR ADCs excel at low-latency, single-shot conversions with no pipeline delay, occupy a small footprint, and draw no idle current between conversions - ideal for multiplexed channel scanning, low-duty-cycle battery-powered sensing, and microcontroller-interfaced data acquisition where simplicity and deterministic latency matter more than maximum throughput.
Key specifications of the ISL26310FBZ include 12-bit resolution, 125 kSPS maximum sampling rate, single +5V analog supply with +3.3V/+5V digital supply, single-ended and true-differential input pair operation, integrated track/hold, and a low-power serial interface that supports SPI, QSPI, and MICROWIRE protocols. The device includes a hardware shutdown pin to reduce current draw between conversions.
The ISL26310FBZ is part of the ISL26310/11/12/13/14/15/19 pin-compatible family that scales channel count, input configuration (single vs. differential), and resolution up to 14-bit. This lets designers migrate between channel counts without PCB redesign. The internal SAR core uses a charge-redistribution DAC array with auto-calibrated capacitor matching to deliver linearity performance consistent across the full industrial temperature range.
Typical applications include industrial process control loop monitoring, portable battery-powered instrumentation, multichannel data acquisition front ends, isolated sensor signal conditioning, and remote telemetry / SCADA modules. The 125 kSPS rate supports per-channel rates up to 10 kSPS in multiplexed multi-channel systems, sufficient for vibration, strain, and temperature acquisition.
When using this device, decouple AVDD and DVDD separately close to the pins with 10uF bulk plus 0.1uF ceramic bypass, and add a 0.1uF cap on REF+ to ground. The shutdown pin (SHDN) can be tied to logic high for always-on operation; drive low between conversions to minimize system power.
This page synthesizes current distributor pricing, drop-in pin-compatible alternatives from the ISL2631x family, and practical design notes not collated in the manufacturer datasheet.
Drop-in-Alternativen für ISL26310FBZ – 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 ISL26310FBZ (gleiche Bauform und Footprint) – abweichend in Package, Input Type, Operating Temperature Range, Architecture, Resolution.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
ISL26310FBZ-T7A
✅ Drop-In✓ Auf Lager
$3.79 / Stück
Datenblatt ansehen →ISL26310FBZ-T
✅ Drop-In✓ Auf Lager
$2.88 / Stück
Datenblatt ansehen →ISL26311FBZ
✅ Drop-In✓ Auf Lager
$2.3 / Stück
Datenblatt ansehen →ISL26312FBZ
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
ISL26319FBZ
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
ISL26310FBZ Grenzwerte & elektrische Eigenschaften
| Auflösung | 12 bits |
| Abtastrate | 125 kSPS |
| Architecture | SAR (Successive Approximation Register) |
| Number of Input Channels | 1 (single-ended or differential) |
| Input Type | Single-ended and pseudo-differential |
| Analog Supply Voltage (AVDD) | 4.75 V to 5.25 V |
| Digital Supply Voltage (DVDD) | 2.7 V to 5.25 V |
| Reference Voltage (REF+) | Up to AVDD |
| Serial Interface | SPI / QSPI / MICROWIRE compatible |
| Abschaltstrom | typ. 1 uA (per datasheet, hardware SHDN pin) |
| Betriebstemperaturbereich | -40 C to +85 C |
| Gehäuse | 8-pin SOIC (NB) |
| Montageart | Surface Mount |
| MSL-Level | 1 (unlimited floor life at <30C / 85% RH) |
| RoHS-Status | Compliant |
ISL26310FBZ Pin-Konfiguration
| Pin 1 | AVDD — Analog power supply, +4.75V to +5.25V |
| Pin 2 | IN+ — Non-inverting analog input |
| Pin 3 | IN- — Inverting analog input (tie to AGND for single-ended operation) |
| Pin 4 | AGND — Analog ground |
| Pin 5 | REF- — Reference ground (tie to AGND) |
| Pin 6 | REF+ — Reference voltage input (up to AVDD) |
| Pin 7 | DVDD — Digital power supply, +2.7V to +5.25V |
| Pin 8 | DGND — Digital ground |
Typische Anwendungen
ISL26310FBZ ist geeignet für 6 Anwendungs: Industrial Process Control Loop Monitoring, Portable Battery-Powered Instrumentation, Multichannel Data Acquisition Front End, Isolated Sensor Signal Conditioning, Remote Telemetry and SCADA Modules, Medical Patient Monitoring (Non-Critical).
Industrial Process Control Loop Monitoring
The ISL26310FBZ digitizes 4-20 mA loop-derived or 0-10V process signals in PLC analog input modules with 12-bit resolution at 125 kSPS. Its SAR architecture delivers deterministic single-shot conversion latency with no pipeline delay - critical for closed-loop PID controllers that demand the latest sample on every cycle. The 5V AVDD range accepts standard industrial sensor rails directly without external signal conditioning, and the SPI interface drops cleanly onto any 3.3V MCU digital bus. The hardware SHDN pin enables sub-microamp standby between scans, lowering module power budget in dense multi-channel systems.
Empfohlen
Portable Battery-Powered Instrumentation
The ISL26310FBZ suits handheld multimeters, field data loggers, and remote diagnostic instruments that spend most of their time in sleep mode. The hardware SHDN pin drops current to single-digit microamps between conversions, while the 125 kSPS burst rate handles rapid per-channel scans at wakeup. Single +5V AVDD operation simplifies the power tree when paired with a boost converter from a Li-ion cell. The 12-bit resolution is sufficient for temperature, voltage, and current measurements in portable test equipment, and the SOIC-8 footprint allows easy hand-soldering during prototyping.
Empfohlen
Multichannel Data Acquisition Front End
In multi-channel DAQ systems, multiple ISL26310FBZ devices can be paralleled - each handling one sensor channel with its own dedicated ADC - to avoid multiplexer settling errors at higher sampling rates. The deterministic SAR latency guarantees synchronized sampling across channels when triggered from the same CONVST pulse. The SOIC-8 package keeps per-channel PCB area minimal, and the SPI interface supports daisy-chaining of multiple converters for MCU pin conservation. This topology is preferred over a single high-channel-count ADC when per-channel isolation or independent reference scaling is required.
Empfohlen
Isolated Sensor Signal Conditioning
The ISL26310FBZ digitizes sensor signals right at the transducer, allowing the digital SPI output to cross an isolation barrier via digital isolator rather than carrying noisy analog signals across the barrier. This dramatically improves noise immunity in motor drive, medical, and industrial isolation applications. The 12-bit resolution is sufficient for most bridge sensors and thermocouples. The SHDN pin enables deterministic startup sequencing through the isolation barrier, and the wide 2.7V-5.25V DVDD range supports direct connection to the isolator's logic side.
Empfohlen
Remote Telemetry and SCADA Modules
In SCADA remote terminal units (RTUs) and telemetry outstations, the ISL26310FBZ digitizes analog field signals (tank level, pressure, flow) for transmission over radio or cellular backhaul. The 125 kSPS rate exceeds typical SCADA per-channel scan rates (1-10 Hz), providing massive oversampling headroom for software averaging. The hardware shutdown enables duty-cycled operation in solar-powered installations. The single +5V supply operation simplifies the power architecture in remote enclosures where component count and reliability drive long-term maintenance cost.
Empfohlen
Medical Patient Monitoring (Non-Critical)
The ISL26310FBZ is suitable for non-critical medical monitoring equipment such as fitness wearables, sleep trackers, and home health devices where 12-bit resolution is sufficient for heart rate, SpO2 trending, or temperature monitoring. Its low shutdown current extends battery life in always-on wearable form factors. The SPI interface integrates with low-power MCUs common in medical IoT. Note that critical-care diagnostic equipment requires higher resolution ADCs (16-bit or 24-bit) and IEC 60601 compliance, which is outside the ISL26310FBZ use envelope.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für ISL26310FBZ – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | ISL26310FBZ-T7A | ISL26310FBZ-T | ISL26311FBZ | ISL26312FBZ | ISL26319FBZ |
|---|---|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| Package | 8-pin SOIC (NB) | 8-pin SOIC (NB) - same | 8-pin SOIC (NB) - same | 8-pin SOIC (NB) - same | 8-pin SOIC (NB) - same | 8-pin SOIC (NB) - same |
| Resolution | 12 bits | 12 bits - same | 12 bits - same | 12 bits - same | 12 bits - same | 12 bits - same |
| Sampling Rate | 125 kSPS | 125 kSPS - same | 125 kSPS - same | 125 kSPS - same | 125 kSPS - same | 125 kSPS - same |
| Number of Input Channels | 1 (SE or diff) | 1 (SE or diff) - same | 1 (SE or diff) - same | 2 SE | 2 pseudo-diff | 8 SE |
| Analog Supply (AVDD) | +5V (4.75-5.25V) | +5V - same | +5V - same | +5V - same | +5V - same | +5V - same |
| Digital Supply (DVDD) | +2.7V to +5.25V | +2.7V to +5.25V - same | +2.7V to +5.25V - same | +2.7V to +5.25V - same | +2.7V to +5.25V - same | +2.7V to +5.25V - same |
| Serial Interface | SPI/QSPI/MICROWIRE | SPI/QSPI/MICROWIRE - same | SPI/QSPI/MICROWIRE - same | SPI/QSPI/MICROWIRE - same | SPI/QSPI/MICROWIRE - same | SPI/QSPI/MICROWIRE - same |
Wichtigste Unterscheidungsmerkmale
- Industry-standard 8-pin SOIC (NB) drop-in for pin-compatible ISL2631x family migration (vs. ISL26310FBZ-T7A)
- Pin-compatible 2/8-channel MUX variants on the same SAR core (vs. ISL26311FBZ)
- Wide 2.7V-5.25V digital supply eliminates level shifters (vs. ISL26310FBZ-T)
Designhinweise
Decouple AVDD (pin 1) and DVDD (pin 7) separately with a 10uF bulk ceramic plus a 0.1uF X7R ceramic bypass capacitor placed within 5mm of each supply pin. Place the AVDD capacitor on a dedicated analog copper pour tied to AGND; do NOT share the AVDD trace with switching converter returns. According to the Renesas ISL26310 datasheet, AVDD noise directly couples into the SAR conversion result because the reference ladder is ratiometric to AVDD. Drive AVDD from a low-noise LDO (such as an ADP7104 or similar) rather than directly from a switching regulator output.
For single-ended operation, tie IN- (pin 3) directly to AGND at the IC pin - do NOT route it through a separate trace, as stray inductance on IN- converts common-mode noise into differential noise. The reference voltage input (REF+, pin 6) must be buffered if its source impedance exceeds 10 ohms; add a 0.1uF ceramic cap directly at REF+ pin to ground. Avoid routing digital signals (SCLK, DOUT) parallel to the analog input traces, or cross them at 90 degrees if a crossing is unavoidable. Do not exceed AVDD on the analog input pins; add external clamping if overvoltage transients are possible.
Implement a split ground plane with AGND (pin 4) and DGND (pin 8) connected at a single point directly under the IC - typically at the exposed pad area or by a short trace joining both ground pins to the same ground pour. Route all analog traces on the AGND side and digital traces (SPI bus) on the DGND side of the split. Use a guard ring around the IN+/IN- traces tied to AGND to absorb stray leakage currents on high-impedance sensor inputs. According to standard SAR ADC layout practice (per CN-0247 and Renesas AN9764 application notes), keep analog traces as short as possible and avoid vias on the IN+/IN- signal path.
Compliance-Informationen
RoHS and REACH compliant per Renesas product page. Standard SOIC-8 (NB) package, MSL Level 1. Not AEC-Q100 qualified; for automotive designs consider AEC-Q100-qualified SAR ADCs from the Renesas ISL78xx or Texas Instruments ADS78xx automotive families.
