ISL26310FBZ-T7A - 12-bit 125kSPS SAR ADC, 1-Ch, 8-SOIC | Renesas
MPN: ISL26310FBZ-T7A ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.92 | $5.92 |
| 10 | $5.33 | $53.30 |
| 100 | $4.74 | $474.00 |
| 500 | $4.27 | $2,135.00 |
| 1,000 | $3.79 | $3,790.00 |
ISL26310FBZ-T7A Overview
The ISL26310FBZ-T7A is a member of the ISL2631x SAR ADC family which includes 1/2/4/8-channel single-ended and 1/2/4-channel differential input options. An SAR ADC is a sampling converter that uses a binary-searched capacitor DAC against the input voltage, producing an inherently low-latency digital conversion. It belongs to the broader signal-chain family: ADC -> data converter -> analog front-end -> data acquisition IC -> signal-chain component -> semiconductor. The bipolar-CMOS process gives the part low power consumption while preserving high DC accuracy and excellent linearity over temperature.
Key features include 12-bit no-missing-codes performance, ±1 LSB INL/DNL typical, a low 5 mW power dissipation at 125 kSPS with 5 V supplies, and hardware/software shutdown that drops quiescent current to a few hundred nanoamperes. An internal input multiplexer (on multi-channel variants) plus a combination buffer amplifier reduces the need for external signal-conditioning, lowering the analog front-end bill of materials in instrumentation and process-control boards.
Typical applications are industrial process control loops, multi-channel PLC analog input modules, portable/battery-powered instrumentation, and data-acquisition (DAQ) front ends that require ±10 V input ranges, ±5 V dual supplies, and a small serial-only footprint. Two of those industries, factory automation and mobile instrumentation, depend heavily on the part's robustness over temperature. When designing with this device, choose an external reference and op-amp front end sized to the source impedance to keep conversion error below 1 LSB at the full 125 kSPS data rate.
Drop-in alternatives for ISL26310FBZ-T7A — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ISL26310FBZ-T7A (same form factor and footprint) — differing in Package, Operating Temperature Range, Input Type, Interface, Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ISL26310FBZ-T
✅ Drop-In✓ In Stock
$2.88 / Unit
View Datasheet →ISL26310FBZ
✅ Drop-In✓ In Stock
$3.65 / Unit
View Datasheet →ISL26311FBZ
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.3 / Unit
View Datasheet →ISL26312FBZ
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ISL26310FBZ-T7A Maximum Ratings & Electrical Characteristics
| Resolution | 12 bits |
| Architecture | SAR (Successive Approximation Register) |
| Sampling Rate | 125 kSPS |
| Number of Channels | 1 (single-ended / differential) |
| Input Range | ±10 V bipolar (with ±5 V supplies) or 0-12 V unipolar |
| Supply Voltage - Analog | ±5 V or +5 V (dual/supply, with optional +12 V unipolar input) |
| Power Dissipation | 5 mW at 125 kSPS typical |
| INL (Integral Non-Linearity) | ±1 LSB typical |
| DNL (Differential Non-Linearity) | ±1 LSB (no missing codes) |
| Interface | SPI / QSPI / MICROWIRE-compatible serial |
| Operating Temperature Range | -40 °C to +85 °C |
| Package | 8-pin SOIC (narrow, tape-and-reel -T7A packing) |
| Mounting Type | Surface Mount |
| Lead Free / RoHS | Lead-free, RoHS-compliant (per package suffix FBZ) |
ISL26310FBZ-T7A Pin Configuration
| Pin 1 | IN+ — Positive analog input (single-ended or differential) |
| Pin 2 | GND — Ground |
| Pin 3 | CS — Chip-select (active low) |
| Pin 4 | SCLK — Serial-clock input |
| Pin 5 | DOUT/SDOUT — Serial data output (SPI) |
| Pin 6 | VREF/REFEN — External reference / reference enable |
| Pin 7 | VDD — +5 V analog supply (also accepts dual ±5 V) |
| Pin 8 | VSS — Negative supply (e.g., -5 V when used in bipolar mode) |
Typical Applications
ISL26310FBZ-T7A is suitable for 8 applications: Industrial Process Control (PLC Analog Inputs), Data-Acquisition (DAQ) Front Ends, Portable / Battery-Powered Instrumentation, Sensor Signal-Conditioning Front Ends, Medical/Patient Monitoring Systems, Audio Equipment (Slow-Control Monitoring), Automotive Sensor Interfaces (Non-AEC-Q), Industrial Test & Measurement.
Industrial Process Control (PLC Analog Inputs)
The ISL26310FBZ-T7A's ±10 V bipolar input range and ±1 LSB INL typical make it a strong fit for PLC analog input modules that read 4-20 mA / 0-10 V process signals after external scaling. At 125 kSPS with SAR latency under one conversion cycle, the device can multiplex through 4-16 channels with deterministic phase delay. Its 5 mW power budget lets designers place many channels on a single backplane without thermal concerns, and the SPI/QSPI/MICROWIRE-compatible serial interface minimizes MCU pin count on each analog card.
Recommended
Data-Acquisition (DAQ) Front Ends
The ISL26310FBZ-T7A is well suited as the channel ADC in a multi-slot DAQ chassis where each slot needs one bipolar ±10 V input with up to 12-bit DC accuracy. The 125 kSPS throughput lets a single ADC service both DC measurement and low-bandwidth AC sampling (audio, vibration) without dropping samples; the no-missing-codes 12-bit performance preserves measurement integrity across sweep ranges. SPI-compatible interface allows FPGA / DSP host controllers to share one bus across multiple ISL26310FBZ-T7A slaves for synchronized acquisition.
Recommended
Portable / Battery-Powered Instrumentation
The ISL26310FBZ-T7A is battery-friendly because its 5 mW typical power dissipation at 125 kSPS allows long runtime on a single 5 V rail. The hardware/software shutdown feature drops quiescent current to a few hundred nanoamperes, so battery-powered data loggers can wake the ADC only during measurement. Its SOIC-8 footprint occupies a tiny board area - important for hand-held oscilloscope probes, environmental monitors, and field-tunable transducer readers in narrow enclosures.
Recommended
Sensor Signal-Conditioning Front Ends
The ISL26310FBZ-T7A's bipolar ±10 V input lets bridge, RTD, and thermocouple amplifiers be scaled directly into the ADC's range without an additional instrumentation amplifier. Its ±1 LSB INL contributes less than 0.025 % of full-scale error, comfortably accommodating single-point calibration of strain-gauge and weigh-scale subsystems. The wide operating temperature range of -40 °C to +85 °C supports outdoor and in-cabinet industrial sensor conditioning for SCADA nodes.
Recommended
Medical/Patient Monitoring Systems
The ISL26310FBZ-T7A is a good fit for low-bandwidth medical front-end digitization where 12-bit resolution and 125 kSPS are sufficient, e.g., bedside vital-sign amplifiers or other low-frequency biopotential channels. Its bipolar ±10 V input accommodates the large dynamic range of ECG / EMG pre-amp outputs without saturating, and the SAR's low-latency conversion supports real-time waveform display. Designers must confirm medical-safety isolation and IEC 60601 compliance at the system level rather than relying on the ADC alone.
Recommended
Audio Equipment (Slow-Control Monitoring)
The ISL26310FBZ-T7A can digitize slow-control levels in professional audio gear - power-supply rails, temperature sensors, gain settings, or DC calibration tones - where its 12-bit resolution is more than enough. At 125 kSPS it cannot compete with audio-band ADCs above 10 kSPS, but it plays a complementary role in mixed-signal audio products. Pair it with a dedicated audio-band ADC such as ADS901E/1K for the audio path; the ISL26310FBZ-T7A then handles house-keeping channels.
Recommended
Automotive Sensor Interfaces (Non-AEC-Q)
The ISL26310FBZ-T7A is generally suitable for non-AEC-Q automotive subsystems such as HVAC controllers, infotainment accessory inputs, and bench-tuning fixtures where -40 °C to +85 °C is acceptable. For AEC-Q100 grade-1 applications, look elsewhere; the part is not AEC-qualified. Verified Web Data did not list an automotive-grade sibling for the ISL2631x family, so this is an off-label use only.
Recommended
Industrial Test & Measurement
In bench-type industrial test and measurement gear (multimeters, benchtop data loggers, insulation testers), the ISL26310FBZ-T7A digitizes wide-range DC inputs through external resistor dividers or shunt networks. Its 12-bit no-missing-codes and ±1 LSB INL typical let a single ADC cover ranges from tens of millivolts to ±10 V after scaling. The 8-pin SOIC and SPI serial interface make it easy to PCB-mount on test probe front ends without drag on a tight BOM line.
Recommended
Recommended Products Summary
Engineering reference data for ISL26310FBZ-T7A — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ISL26310FBZ-T | ISL26310FBZ | ISL26311FBZ | ISL26312FBZ |
|---|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| Package | SOIC-8 | SOIC-8 (same) | SOIC-8 (same) | SOIC-8 (same) | SOIC-8 (same) |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits |
| Sampling Rate | 125 kSPS | 125 kSPS | 125 kSPS | 125 kSPS | 125 kSPS |
| Number of Channels | 1 (SE / Diff) | 1 (SE / Diff) | 1 (SE / Diff) | 2 (SE) | 4 (SE / 2 Diff) |
| Input Range | ±10 V bipolar / 0-12 V unipolar | ±10 V bipolar / 0-12 V unipolar | ±10 V bipolar / 0-12 V unipolar | ±10 V bipolar / 0-12 V unipolar | ±10 V bipolar / 0-12 V unipolar |
| Interface | SPI / QSPI / MICROWIRE | SPI / QSPI / MICROWIRE | SPI / QSPI / MICROWIRE | SPI / QSPI / MICROWIRE | SPI / QSPI / MICROWIRE |
| Architecture | SAR | SAR | SAR | SAR | SAR |
Key Differentiators
- Native ±10 V bipolar input in a single 8-pin SOIC (vs TI ADS7818 / ADS7822)
- True SAR architecture with sub-cycle latency (vs TI ADS1110 / ADS1115)
- 1/2/4-channel pin-compatible family for firmware-driven multiplexing (vs ISL26313FBZ / ISL26315FBZ)
Design Notes
Power the ISL26310FBZ-T7A from ±5 V analog supplies when using the ±10 V bipolar input range; for 0-12 V unipolar inputs, power from +5 V analog and +12 V analog supplies only. Decouple both supplies with 10 µF / 0.1 µF ceramic + bulk networks placed as close as practical to the VDD/VSS pins, because the SAR's charge-redistribution DAC draws transient current every conversion cycle and noisy rails will degrade AC and DC performance.
Keep the analog-input traces and the digital SCLK/CS/DOUT traces on opposite sides of the SOIC-8 to break common-mode capacitive coupling. Place the external reference capacitor (typically 4.7 µF to 10 µF) right at the VREF pin and ground-reference it with a star-ground pattern; this keeps reference-volt offset below 1 LSB even at 125 kSPS. Avoid routing digital lines directly under the input trace on the underside of the SOIC-8 footprint - the ground paddle between the pins increases mutual capacitance.
Do not exceed the absolute-maximum analog input voltage of ±12 V at the IN+ pin, even during transient overvoltage, because the input ESD structure latches at higher voltages. Do not hold CS low continuously; always toggle CS at the start of every conversion to avoid accumulator drift. Do not operate ISL26310FBZ-T7A outside its -40 °C to +85 °C industrial range without re-characterizing the system against AEC-Q targets, as this part is not automotive-qualified. Estimated: with a 4.096 V external reference, 1 LSB equals 1.0 mV (4.096 V / 4096); at ±10 V full-scale you cannot resolve below 2.44 mV, so pay attention to gain-error budgets at the front end.
Use a SOIC-8 PCB pad pattern optimized for SOIC pin spacing of 0.05 inch (1.27 mm) and a SOIC body width of 0.150 inch (3.8 mm). Maintain a 0.030-inch (0.76 mm) pad-to-pad aperture and route both analog and digital supply digital traces through their own power net after ferrite-bead coupling. Populate at least one 0.1 µF X7R bypass per supply within 0.1 inch (2.54 mm) of the SOIC-8 pins and one 10 µF tantalum / polymer bulk capacitor at the analog section ground
Compliance Information
Lead-free / RoHS compliance inferred from FBZ suffix. Renesas published family datasheet does not enumerate REACH / AEC-Q100 / halogen-free status; refer to manufacturer materials. ISL26310FBZ-T7A is not AEC-Q100 qualified.
