ISL26325FVZ-T7A - 12-bit 250kSPS 4-ch SAR ADC | Renesas
Teilenummer: ISL26325FVZ-T7A ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $5.95 | $5,95 |
| 10 | $5.32 | $53,20 |
| 100 | $4.62 | $462,00 |
| 500 | $3.99 | $1.995,00 |
| 1.000 | $3.45 | $3.450,00 |
ISL26325FVZ-T7A Übersicht
An SAR ADC is a Nyquist-rate converter that performs a binary search on the analog input using an internal capacitive DAC and comparator. Unlike sigma-delta ADCs, SAR converters deliver a single conversion per acquisition with no pipeline latency, making them ideal for multiplexed multi-channel data-acquisition systems where deterministic latency and fast channel-to-channel settling matter. SAR parts slot into the hierarchy analog-to-digital converter -> data converter -> signal-chain IC -> mixed-signal semiconductor.
Key features of the ISL26325FVZ include ±1 LSB INL (typical), a true 12-bit no-missing-codes guarantee, a serial SPI-/QSPI-/MICROWIRE-compatible interface, and a proprietary input multiplexer with integrated input buffer amplifier that reduces the external driver requirements. The part accepts single-ended inputs in the range 0 V to AVDD and differential inputs in the range -AVDD to +AVDD, supporting bipolar signal swings around a common-mode voltage.
Typical applications span industrial process control, multi-loop programmable logic controllers (PLC) analog front ends, portable instrumentation, battery-powered sensor hubs, 4-wire RTD / thermocouple digitizers, and general-purpose data-acquisition cards. The wide supply range, low power, and small TSSOP-16 footprint also make the device attractive in compact embedded designs where board area and quiescent current are at a premium.
When designing with the ISL26325FVZ, choose the analog input capacitor and external reference capacitor per the application note recommendations for AC performance, place the AVSS and DGND ground returns on a low-impedance ground plane, and verify the SCLK idle level matches the chosen SPI mode (CPOL/CPHA) of the host microcontroller. Decouple AVDD and DVDD with separate 10 µF + 0.1 µF pairs to keep digital switching transients out of the analog reference.
This page synthesizes distributor pricing (as of 2026-10-13), drop-in alternatives, comparison parameters, and design notes not collated in the manufacturer datasheet alone, giving engineers a single reference for sourcing and second-sourcing decisions on the ISL26325 family.
Drop-in-Alternativen für ISL26325FVZ-T7A – 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 ISL26325FVZ-T7A (gleiche Bauform und Footprint) – abweichend in Number of Input Channels, Package, Input Type, Operating Temperature Range, Sample Rate.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
ISL26325FVZ
✅ Drop-In✓ Auf Lager
$3.1 / Stück
Datenblatt ansehen →ISL26320FBZ-T7A
✅ Drop-In✓ Auf Lager
$3.45 / Stück
Datenblatt ansehen →ISL26315FVZ-T7A
✅ Drop-In✓ Auf Lager
$2.52 / Stück
Datenblatt ansehen →ISL26312FVZ-T
✅ Drop-In✓ Auf Lager
$1.02 / Stück
Datenblatt ansehen →ISL26311FBZ
✅ Drop-In✓ Auf Lager
$2.3 / Stück
Datenblatt ansehen →ADS7822PG4
✅ Drop-In✓ Auf Lager
$3.2 / Stück
Datenblatt ansehen →ISL26325FVZ-T7A Grenzwerte & elektrische Eigenschaften
| Auflösung | 12 bit |
| Sample Rate | 250 kSPS |
| Architecture | SAR (Successive Approximation Register) |
| Number of Input Channels | 4 (single-ended or differential) |
| Input Type | Single-Ended and Differential |
| Analog Supply Voltage (AVDD) | 2.7 V to 5.5 V |
| Digital Supply Voltage (DVDD) | 2.7 V to 5.5 V |
| Analog Input Range (single-ended) | 0 V to AVDD |
| Analog Input Range (differential) | -AVDD to +AVDD |
| Referenzspannung | External, up to AVDD |
| Schnittstelle | Serial SPI / QSPI / MICROWIRE-compatible |
| INL (typical) | ±1 LSB |
| Supply Current at 250 kSPS | 1.9 mA (typical) |
| Power-Down Current | Few hundred nA (typical) |
| Betriebstemperatur | -40 °C to +125 °C |
| Gehäuse | 16-pin TSSOP |
| Montageart | Surface Mount |
| RoHS-Status | Compliant |
| Lead-Free | Yes |
ISL26325FVZ-T7A Pin-Konfiguration
| Pin 1 | AIN0/REF+ — Analog input 0 / external reference positive |
| Pin 2 | AIN1 — Analog input 1 |
| Pin 3 | AIN2 — Analog input 2 |
| Pin 4 | AIN3 — Analog input 3 |
| Pin 5 | AVSS — Analog ground |
| Pin 6 | REF- — External reference negative (connect to AVSS if unused) |
| Pin 7 | AVDD — Analog supply voltage (2.7 V to 5.5 V) |
| Pin 8 | DVDD — Digital supply voltage (2.7 V to 5.5 V) |
| Pin 9 | DGND — Digital ground |
| Pin 10 | CS — Chip select (active low) |
| Pin 11 | SCLK — Serial clock input |
| Pin 12 | SDOUT — Serial data output |
| Pin 13 | SDIN — Serial data input |
| Pin 14 | PD — Power-down input (active high) |
| Pin 15 | NC — Not connected (per datasheet) |
| Pin 16 | NC — Not connected (per datasheet) |
Typische Anwendungen
ISL26325FVZ-T7A ist geeignet für 6 Anwendungs: Industrial Process Control & PLC Analog Front End, Battery-Powered Portable Instrumentation, Multi-Channel Temperature Sensor Digitizer (RTD / Thermocouple), General-Purpose Data Acquisition Card (USB / Ethernet DAQ), Programmable Logic Controller (PLC) Digital Input Module, Embedded Sensor Hub / IoT Edge Node.
Industrial Process Control & PLC Analog Front End
The ISL26325FVZ-T7A fits industrial process-control analog front ends thanks to its 4 single-ended or differential inputs (matching 4-20 mA loop conditioner outputs), 12-bit resolution with ±1 LSB INL, and 250 kSPS throughput that over-samples slow plant variables. The TSSOP-16 footprint drops onto a PLC analog-input card, where the SPI interface streams conversions to the host MCU without bus contention. Wide 2.7-5.5 V supply tolerates 24 V loop-derived rails after regulation, and the -40 to +125 °C rating covers cabinet environments. The internal input buffer reduces the need for external op-amp drivers, cutting BOM cost on multi-channel PLC designs where each saved amplifier multiplies across many channels.
Empfohlen
Battery-Powered Portable Instrumentation
The ISL26325FVZ-T7A's 1.9 mA typical operating current and nanoamp-level power-down current make it well-suited for handheld multimeters, portable data loggers, and field instruments that duty-cycle between conversions. A single Li-ion cell (nominally 3.7 V) sits inside the 2.7-5.5 V supply window without boost conversion, simplifying the power tree. The 4-channel input directly digitizes multiple sensors (temperature, pressure, voltage) in one IC, reducing board area. SPI/QSPI/MICROWIRE compatibility connects directly to low-power MCUs without glue logic, and the TSSOP-16 package keeps the analog section small enough for pen-style form factors.
Empfohlen
Multi-Channel Temperature Sensor Digitizer (RTD / Thermocouple)
The ISL26325FVZ-T7A's 4 differential inputs and ±AVDD common-mode range naturally accept thermocouple and 4-wire RTD bridge signals after low-noise instrumentation-amp conditioning. Its 12-bit resolution (4096 codes) gives ~0.024 % full-scale resolution, adequate for K-type thermocouple digitization over -200 to +1372 °C after linearization. The 250 kSPS throughput lets the host MCU cycle through all 4 channels in well under 1 ms, supporting fast over-temperature protection loops. Low integral nonlinearity (±1 LSB) keeps calibration error minimal across the operating range, which is critical for IEC 60730 functional-safety temperature monitoring.
Empfohlen
General-Purpose Data Acquisition Card (USB / Ethernet DAQ)
The ISL26325FVZ-T7A's 250 kSPS aggregate sample rate suits cost-optimized 4-channel DAQ cards targeting 100 kSPS-per-channel effective rates for vibration, strain-gauge, and analog-frontend digitization. Its SAR architecture provides deterministic single-conversion latency - essential for triggered acquisition and time-correlated measurements - unlike sigma-delta ADCs with their group-delay. Differential inputs reject common-mode noise picked up on long sensor cables. The SPI interface bridges to FPGA or MCU DAQ controllers, and the TSSOP-16 footprint allows 8-channel DAQ cards to pair two ISL26325s on a single board for 8 simultaneous inputs without exotic multiplexing.
Empfohlen
Programmable Logic Controller (PLC) Digital Input Module
The ISL26325FVZ-T7A's 4-channel multiplexer and integrated input buffer are an effective fit for PLC mixed-signal I/O modules that must digitize 0-10 V analog inputs alongside digital I/O. SAR single-shot conversion avoids the latency of oversampling-and-decimate converters, allowing fast loop-response times for closed-loop valve control. Industrial temperature grade (-40 to +125 °C) tolerates cabinet environments without derating. Differential input capability rejects ground potential differences between PLC chassis and remote sensor grounds, and the 5 V supply tolerance is compatible with the 24 V backplane after local regulation.
Empfohlen
Embedded Sensor Hub / IoT Edge Node
The ISL26325FVZ-T7A fits IoT edge nodes that aggregate multiple analog sensors (light, gas, sound level, soil moisture) into a single low-power ADC. The 4-channel input handles four sensor types in one IC, and the nanoamp power-down current lets the MCU power-cycle the ADC between sample windows for sub-100 µA average draw. SPI/QSPI/MICROWIRE compatibility talks directly to popular IoT microcontrollers (Renesas RA, ESP32, Nordic nRF) without external logic. Operating from a single 3.3 V rail simplifies power design for battery or energy-harvesting edge nodes. The 12-bit resolution is sufficient for most environmental sensor reporting where 1 % absolute accuracy is acceptable.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für ISL26325FVZ-T7A – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | ISL26325FVZ | ISL26320FBZ-T7A | ISL26315FVZ-T7A | ISL26312FVZ-T | ISL26311FBZ | ADS7822PG4 |
|---|---|---|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Texas Instruments |
| Package | 16-TSSOP | 16-TSSOP - same | 16-TSSOP - same | 16-TSSOP - same | 16-TSSOP - same | 16-TSSOP - same | 16-TSSOP - same |
| Interface | SPI/QSPI/MICROWIRE | SPI/QSPI/MICROWIRE | SPI/QSPI/MICROWIRE | SPI | SPI | SPI | SPI/QSPI/MICROWIRE |
| Architecture | SAR | SAR | SAR | SAR | SAR | SAR | SAR |
| Operating Temperature | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +85 °C (typical) | -40 °C to +85 °C (typical) | -40 °C to +85 °C (typical) | -40 °C to +85 °C |
Wichtigste Unterscheidungsmerkmale
- Integrated 4-channel input multiplexer with input buffer amplifier (vs. ISL26320FBZ-T7A)
- Wide 2.7 V to 5.5 V supply range supports both 3.3 V and 5 V rails (vs. ADS7822PG4 (TI))
- No-missing-codes 12-bit performance with ±1 LSB INL typical (vs. Generic TSSOP-16 SAR ADCs)
Designhinweise
Decouple AVDD and DVDD with separate 10 µF bulk + 0.1 µF ceramic pairs placed within 5 mm of the supply pins. Tie AVDD and DVDD together at a single point near the IC when running from one 3.3 V rail; route star-ground back to the regulator. The internal analog and digital grounds (AVSS, DGND) should be joined at one low-impedance copper pour beneath the IC to prevent digital switching currents from corrupting the analog reference.
Place the external reference decoupling capacitor (typically 10 µF tantalum + 0.1 µF ceramic in parallel) directly between the REF+/REF- pins with traces short and wide. Keep digital lines (CS, SCLK, SDOUT, SDIN) routed away from the analog input traces and AVDD/REF planes. Use a guard ring around the analog inputs tied to AVSS to absorb stray leakage currents from the TSSOP-16 package, particularly in high-impedance sensor applications.
Verify the SPI mode (CPOL/CPHA) of the host MCU matches the ISL26325FVZ-T7A timing diagram in the datasheet - mismatched modes cause the SDOUT data to appear shifted or stuck. Ensure CS idle-high between conversions and provide adequate tSU_CSS setup time before the first SCLK rising edge. Do not exceed the AVDD absolute maximum (6 V) during transient events; place a TVS or Zener clamp on the analog supply if the input is hot-pluggable.
For best AC performance (SNR, THD), drive the analog inputs from a low-impedance source (<100 Ω) through a short PCB trace, since the internal buffer amplifier reduces but does not eliminate input drive requirements. In multi-channel scanning applications, add 10 kHz or higher anti-aliasing RC filters ahead of the analog inputs to suppress out-of-band noise that would otherwise alias into the conversion bandwidth. Avoid switching digital lines adjacent to the analog inputs during the acquisition window (tACQ) to prevent kickback coupling.
Compliance-Informationen
RoHS and lead-free per Renesas product page. Not AEC-Q100 qualified (consumer/industrial grade). MSL level not stated in retrieved web data - see datasheet for floor-life.