ISL26324FVZ-T - 12-bit 250kSPS 4-ch SAR ADC | Renesas
MPN: ISL26324FVZ-T ✓ NakahandaISL26324FVZ-T Ulas
An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that samples a continuous analog voltage and quantizes it into a discrete binary code. Within the converter taxonomy, SAR ADCs use a binary-search successive-approximation algorithm with an internal sample-and-hold and a precision DAC, providing deterministic latency, low power, and high accuracy at moderate sampling rates (typically up to ~1 MSPS). SAR ADCs are widely used as the precision A/D building block inside data-acquisition systems, motor control loops, instrumentation front-ends, and sensor signal chains where DC accuracy and repeatable sampling latency matter more than raw speed.
Key features of the ISL26324FVZ-T include a high-impedance analog input multiplexer with proprietary input buffer that relaxes external driver requirements, an SPI-compatible serial digital interface for easy connection to microcontrollers and FPGAs, an auto power-down mode that reduces operating current to 8 µA typical between conversions, and excellent linearity (THD -82 dBFS) over the full supply and temperature range.
The internal architecture combines an input multiplexer, a track-and-hold buffer, the SAR conversion core, and a precision reference input. The serial interface uses simple SCLK, SDOUT and CS lines, supporting read-out rates up to the maximum conversion rate without requiring an external clock. Channel selection and configuration are programmed through the SPI interface.
Typical applications include industrial process control, multi-channel sensor monitoring, portable instrumentation, factory automation, and medical patient monitoring. The wide supply range (2.7 V to 5.25 V) makes the part equally at home in 3.3 V microcontroller systems and 5 V industrial backplanes.
A key design consideration is the bypass network on AVDD and DVDD: place 10 µF tantalum and 0.1 µF ceramic capacitors within a few millimeters of each supply pin to keep switching transients out of the conversion result. Reference decoupling is also critical, particularly when an external reference is used.
This page synthesizes verified distributor pricing, drop-in alternative MPNs from the same ISL2632x family and competitive SAR ADCs, and practical design notes - information gain that is not assembled on the Renesas product page alone.
Mga alternatibo na pwedeng ilagay na ISL26324FVZ-T — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
Variante sa Seri na ito
Katulad na modelo sa serye na katugma sa pagpasok ISL26324FVZ-T (parehas na form factor at footprint) — pagkakaiba sa Package, Input Type, Auto Power-Down Current, Family, Interface.
ISL26324FVZ-T7A
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
ISL26325FVZ-T
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →ISL26323FVZ-T
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
ISL26322FVZ-T
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
ISL26329FVZ-T
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →ISL26321FVZ-T
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
ISL26324FVZ-T Mga Pinakamataas na Rating at Electrical Characteristics
| Pangangasiwaan | 12 bit |
| Rate ng Pagkupita | 250 kSPS |
| Architecture | SAR (Successive Approximation Register) |
| Number of Channels | 4 single-ended / 2 differential |
| Input Type | Single-Ended and Differential |
| Analog Supply Voltage | 2.7 V to 5.25 V |
| Digital Interface | SPI-compatible serial |
| Power Consumption at 250 kSPS | 15 mW typical |
| Auto Power-Down Current | 8 µA typical (between conversions) |
| SINAD / THD | THD -82 dBFS |
| Hanay ng Temperature na Operasyon | -40 °C to +125 °C (automotive grade per datasheet naming) |
| Packhaging | 16-pin TSSOP |
| Uri ng Pagpapasok | Surface Mount |
| Tindminan RoHS | Compliant |
| Lead-Free | Yes |
Pin Configuration ng ISL26324FVZ-T
| Pin 1 | AVDD — Analog supply voltage (2.7 V to 5.25 V) |
| Pin 2 | IN0 — Analog input channel 0 |
| Pin 3 | IN1 — Analog input channel 1 |
| Pin 4 | IN2 — Analog input channel 2 |
| Pin 5 | IN3 — Analog input channel 3 |
| Pin 6 | AGND — Analog ground |
| Pin 7 | REF+ — Positive reference input |
| Pin 8 | REF- — Negative reference input (typically tied to AGND) |
| Pin 9 | CS — Chip select (active low, SPI) |
| Pin 10 | SCLK — Serial clock input (SPI) |
| Pin 11 | SDOUT — Serial data output (SPI) |
| Pin 12 | DGND — Digital ground |
| Pin 13 | DVDD — Digital supply voltage |
| Pin 14 | NC — Not connected (per datasheet) |
| Pin 15 | NC — Not connected (per datasheet) |
| Pin 16 | NC — Not connected (per datasheet) |
Tipikal na mga Gamit
ISL26324FVZ-T ay nararapat para sa 6 aplikasyons: Industrial Process Control / Multi-Channel Sensor Monitoring, Portable Battery-Powered Instrumentation, Medical Patient Monitoring Equipment, Factory Automation & PLC Analog Modules, Energy Harvesting / Wireless Sensor Nodes, Motor Control Position / Current Sensing.
Industrial Process Control / Multi-Channel Sensor Monitoring
The ISL26324FVZ-T's 4 single-ended / 2 differential inputs, 12-bit resolution, and 250 kSPS throughput make it ideal for industrial PLC analog input modules and multi-channel sensor monitoring backplanes. Its wide 2.7-5.25 V supply tolerates 24 V industrial rails post-regulation. A 4-20 mA current loop or thermocouple, conditioned by a front-end op-amp, drives the MUX inputs sequentially, while the SPI interface streams conversion data to a host microcontroller. Compared with discrete ADCs, the ISL26324FVZ-T's 15 mW power budget keeps heat low in sealed IP67 enclosures, and the auto power-down to 8 µA between conversions lets the host poll the sensor cluster without overheating the module.
Inirekomenda
Portable Battery-Powered Instrumentation
With 15 mW power consumption at 250 kSPS and 8 µA quiescent current in auto power-down, the ISL26324FVZ-T is well-suited to portable battery-powered instruments such as handheld multimeters, field data loggers, and portable gas detectors. The integrated input buffer reduces the op-amp drive requirements, lowering the BOM cost in compact handheld designs where board space is critical. Operating from a single Li-ion cell (3.0 V to 4.2 V) or two AA cells, the device delivers 12-bit precision on temperature, voltage, and current sensor inputs. SPI control lets the host microcontroller duty-cycle the ADC, only converting when a measurement is needed.
Inirekomenda
Medical Patient Monitoring Equipment
The ISL26324FVZ-T's 12-bit resolution and 250 kSPS are well-matched to medical patient-monitoring front-ends that digitize ECG, SpO2, temperature, and respiration channels. The 4 single-ended inputs allow simultaneous digitization of multiple patient parameters through a single ADC, reducing board space and BOM cost in compact bedside monitors. The proprietary input buffer simplifies the front-end anti-alias filter design, while the SPI interface streams data to a medical-grade microcontroller. The 2.7-5.25 V supply range permits direct operation from battery packs or regulated 3.3 V rails. For higher channel count, the pin-compatible ISL26329FVZ-T provides 8 single-ended channels in the same 16-pin TSSOP.
Inirekomenda
Factory Automation & PLC Analog Modules
PLC analog input modules and factory-automation controllers require multi-channel ADCs that can digitize 4-20 mA loop signals, 0-10 V analog outputs, and thermistor/thermocouple inputs. The ISL26324FVZ-T's 4 single-ended / 2 differential input channels directly interface with these standardized industrial sensor outputs through signal conditioning, while the SPI interface integrates with the PLC's central processor. The 250 kSPS throughput enables sub-millisecond loop response time, critical for closed-loop process control. The wide 2.7-5.25 V supply tolerance handles 24 V industrial rails post-regulation. Compared with discrete ADC designs, the ISL26324FVZ-T reduces PCB area by integrating the input MUX and input buffer on-chip.
Inirekomenda
Energy Harvesting / Wireless Sensor Nodes
Energy-harvesting wireless sensor nodes depend on ultra-low-power ADCs to maximize battery life. The ISL26324FVZ-T's 8 µA auto power-down current between conversions and 15 mW active power at 250 kSPS make it a strong fit for solar/vibration-powered sensor nodes that periodically digitize temperature, humidity, or strain-gauge data and transmit via radio. The integrated input buffer reduces the drive requirements on low-power sensor front-ends, while the SPI interface streams data to a wireless MCU such as a Renesas RL78 or RX. The 4 single-ended inputs allow multi-parameter sensing on a single ADC, reducing BOM and standby power.
Inirekomenda
Motor Control Position / Current Sensing
Brushless DC and stepper motor controllers require simultaneous sampling of phase current, DC-bus voltage, and position feedback signals at high update rates. The ISL26324FVZ-T's 250 kSPS throughput and 4 single-ended / 2 differential inputs are well-suited to digitize two phase currents differentially plus the DC-bus voltage and a temperature sensor through four channels. The SPI interface streams conversion data to the motor-control MCU with deterministic latency, enabling precise FOC commutation. The wide 2.7-5.25 V supply tolerates motor-bus transients post-regulation. Compared with delta-sigma ADCs, the SAR architecture provides no-latency conversion, ideal for current-loop control.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for ISL26324FVZ-T — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | ISL26324FVZ-T7A | ISL26325FVZ-T | ISL26323FVZ-T | ISL26322FVZ-T | ISL26329FVZ-T |
|---|---|---|---|---|---|---|
| Package | 16-pin TSSOP | 16-pin TSSOP (same) | 16-pin TSSOP (same) | 16-pin TSSOP (same) | 16-pin TSSOP (same) | 16-pin TSSOP (same) |
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit |
| Sampling Rate | 250 kSPS | 250 kSPS | 250 kSPS | 250 kSPS | 250 kSPS | 250 kSPS |
| Number of Channels | 4 SE / 2 Diff | 4 SE / 2 Diff (same) | 8 SE / 4 Diff (+4 ch) | 2 SE / 1 Diff (-2 ch) | 1 SE / 0 Diff (-3 ch) | 8 SE / 4 Diff (+4 ch) |
| Analog Supply | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V |
| Digital Interface | SPI | SPI | SPI | SPI | SPI | SPI |
Pangunahing mga Pagkakaiba
- Highest channel-count option in same TSSOP-16 footprint (kumpara saISL26322FVZ-T (1-channel))
- Lower channel count and BOM cost than higher-density variant (kumpara saISL26325FVZ-T (8-channel))
- Same die, larger reel format for production volume (kumpara saISL26324FVZ-T7A)
Talaan ng Disenyo
Decouple AVDD and DVDD with a 10 µF tantalum capacitor in parallel with a 0.1 µF ceramic capacitor placed within a few millimeters of each supply pin. The reference input (REF+ to REF-) must be bypassed with a similar 10 µF + 0.1 µF network to prevent reference-noise coupling into conversion results. The ISL26324FVZ-T draws 15 mW active and only 8 µA in auto power-down, so an LDO with low quiescent current is preferable to a switching regulator on the analog rail.
Keep the analog input traces short and routed away from digital switching lines (SCLK, CS, SDOUT) to minimize digital-coupling noise. Use a single-point ground star with the AGND pin returned directly to the system analog ground, and the DGND pin returned to the digital ground. The exposed pad of the TSSOP (where present) should be soldered to the analog ground copper pour for thermal dissipation.
Do not drive the analog inputs beyond AVDD + 0.3 V or below AGND - 0.3 V - the input protection diodes will conduct and inject current into the analog supply. Always enter auto power-down mode between conversions on battery-powered designs to achieve the 8 µA quiescent current; leaving the device in continuous-conversion mode wastes 15 mW continuously. The SPI SCLK frequency must not exceed the maximum rated value (refer to datasheet timing table) or SDOUT data will be corrupted.
The proprietary input multiplexer/buffer combination reduces the drive requirement on the front-end op-amp. Most modern low-noise op-amps (e.g. ISL28207, OPA2227) can drive the analog input directly without an additional buffer stage. For multi-MHz source-impedance sensors, place a 10 pF to 100 pF capacitor at each input pin to limit the input-bandwidth and prevent kickback-induced settling errors during channel switching.
Impormasyon ng Pagsunod sa Kautusan
RoHS compliant per Renesas product page. The -FVZ suffix indicates 16-pin TSSOP automotive-grade temperature range (-40 to +125 °C). Not AEC-Q100 qualified - confirm with manufacturer for automotive safety-critical applications.