ISL26315FVZ-T7A - 12-bit 125kSPS 4-CH SAR ADC | Renesas
부품 번호: ISL26315FVZ-T7A ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.78 | $37.80 |
| 100 | $3.36 | $336.00 |
| 500 | $2.94 | $1,470.00 |
| 1,000 | $2.52 | $2,520.00 |
ISL26315FVZ-T7A 개요
A SAR ADC is a successive-approximation-register analog-to-digital converter that performs one conversion per clock cycle using a binary-search algorithm against an internal precision DAC, then digitizes a single input sample per acquisition. Unlike delta-sigma ADCs, SAR converters offer deterministic latency, no pipeline delay, and excellent DC accuracy, which is why they dominate multiplexed data acquisition, industrial process control, and precision instrumentation. The ISL26315FVZ-T7A fits the SAR -> ADC -> data converter -> signal chain IC hierarchy.
Key parametric features include ±1 LSB INL/DNL (max), 4 single-ended analog inputs routed through an internal MUX, an SPI/QSPI/MICROWIRE-compatible serial interface, and a hardware pin-selectable sequencer that cycles through pre-programmed input channels. The device supports both unipolar (0 to VREF) and bipolar (programmed through input scaling) input ranges by changing the reference voltage.
Architecturally, the ISL26315FVZ-T7A uses a charge-redistribution DAC array with a high-impedance input stage. The internal buffer allows direct connection to high-impedance sources, while the SAR engine completes a 12-bit conversion in 8 µs. Power consumption scales linearly with sample rate, drawing roughly 3 mA at 125 kSPS and dropping into the µA range at lower throughput, enabled by an automatic power-down between conversions.
Typical applications include industrial process control, battery-powered instrumentation, multi-channel sensor monitoring (temperature, pressure, strain gauges), and portable medical devices. The wide supply range and internal buffer make it ideal for monitoring multiple transducers with one ADC.
Design consideration: place a 10 µF tantalum plus 0.1 µF ceramic bypass close to pins 13 (AVDD) and 2 (DVDD), and keep the analog ground return isolated from digital switching currents. Decoupling and short analog traces are critical for meeting the ±1 LSB linearity spec.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
드롭인 대체품: ISL26315FVZ-T7A — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: ISL26315FVZ-T7A (동일 폼 팩터 및 풋프린트) — 차이점: Number of Input Channels, Input Type, Package, Interface, RoHS Status.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
ISL26312FVZ-T
✅ 드롭인 ⚠️ 사양 미검증✓ 재고 있음
$1.02 / 개
데이터시트 보기 →ISL26311FBZ
✅ 드롭인 ⚠️ 사양 미검증✓ 재고 있음
$2.3 / 개
데이터시트 보기 →ISL26314FVZ
✅ 드롭인 ⚠️ 사양 미검증✓ 재고 있음
$3.55 / 개
데이터시트 보기 →AD7993BRU-0REEL
✅ 드롭인✓ 재고 있음
$3.4 / 개
데이터시트 보기 →ADS7822PG4
✅ 드롭인✓ 재고 있음
$3.2 / 개
데이터시트 보기 →ISL26315FVZ-T7A 최대 정격 & 전기적 특성
| 분해능 | 12 bits |
| Sample Rate | 125 kSPS |
| Number of Input Channels | 4 single-ended (1 differential option) |
| ADC Architecture | SAR |
| Input Type | Single-ended |
| Analog Supply Voltage (AVDD) | 2.7 V to 5.25 V |
| Digital Supply Voltage (DVDD) | 1.68 V to 5.25 V |
| INL (Integral Non-Linearity) | ±1 LSB (max) |
| DNL (Differential Non-Linearity) | ±1 LSB (max) |
| 기준 전압 | External (0 to AVDD) |
| 인터페이스 | SPI/QSPI/MICROWIRE-compatible serial |
| Sequencer | Hardware-resettable, pin-programmable |
| Power Consumption at 125 kSPS | 3 mA (typ) |
| 패키지 | 16-TSSOP (FVZ) |
| 동작 온도 | -40 C to +125 C |
| 실장 유형 | Surface Mount |
| RoHS 상태 | Compliant |
ISL26315FVZ-T7A 핀 구성
| 핀 1 | SCLK — Serial clock input |
| 핀 2 | DVDD — Digital supply voltage |
| 핀 3 | DOUT — Serial data output |
| 핀 4 | DIN — Serial data input |
| 핀 5 | DGND — Digital ground |
| 핀 6 | AIN0 — Analog input channel 0 |
| 핀 7 | AIN1 — Analog input channel 1 |
| 핀 8 | AIN2 — Analog input channel 2 |
| 핀 9 | AIN3 — Analog input channel 3 |
| 핀 10 | REF — External reference voltage input |
| 핀 11 | AGND — Analog ground |
| 핀 12 | AGND — Analog ground |
| 핀 13 | AVDD — Analog supply voltage |
| 핀 14 | CS — Chip select (active low) |
| 핀 15 | SEQ/RESET — Sequencer enable / hardware reset |
| 핀 16 | CONVST — Conversion start input |
일반적인 애플리케이션
ISL26315FVZ-T7A 적합 용도: 6 애플리케이션s: Industrial Process Control PLCs, Battery-Powered Multi-Sensor Data Loggers, Portable Medical Patient Monitoring, Strain-Gauge Weigh Scales and Load Cells, Automotive Sensor Cluster Digitizers, IoT Edge Sensor Nodes.
Industrial Process Control PLCs
The ISL26315FVZ-T7A's 4 single-ended inputs and hardware sequencer enable direct connection to multiple 4-20 mA current-loop transducers (with shunt resistors) in PLC analog input modules. Its 125 kSPS throughput supports control-loop update rates above 1 kHz when multiplexing 4 channels, while ±1 LSB INL/DNL guarantees calibration accuracy across the industrial -40 C to +85 C range. The 2.7-5.25 V AVDD supply aligns with 24 V->5 V downstream rails common in PLC backplanes, simplifying power architecture.
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Battery-Powered Multi-Sensor Data Loggers
The ISL26315FVZ-T7A fits portable data loggers that monitor multiple sensors (temperature, pressure, humidity) from a single coin-cell or Li-ion source. Its automatic power-down between conversions drops supply current into the µA range at low sample rates, while 125 kSPS peak throughput supports burst-mode logging when the device wakes. The 4-channel input MUX eliminates the need for an external analog switch, reducing BOM and PCB area in compact wearable designs.
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Portable Medical Patient Monitoring
Medical patient monitors require low-noise, multi-channel acquisition for ECG, SpO2, temperature, and respiration sensors. The ISL26315FVZ-T7A's SAR architecture provides deterministic latency critical for synchronized ECG sampling, while ±1 LSB linearity ensures accurate SpO2 calculations from photodiode currents. The 16-TSSOP footprint fits compact wearable holter designs, and the wide 2.7-5.25 V supply supports both 3.3 V and 5 V analog front-ends commonly used in medical instrumentation.
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Strain-Gauge Weigh Scales and Load Cells
Load-cell digitizers require simultaneous sampling of 4 load cells to compute weight and center-of-gravity in platform scales. The ISL26315FVZ-T7A sequences through 4 single-ended channels synchronously, while its hardware sequencer removes MCU overhead for low-power battery operation. Combined with an AD8221 instrumentation amp, it achieves better than 0.1% FS accuracy for commercial weighing scales. The 12-bit resolution fits retail scales where 1 g resolution over 50 kg FS suffices.
추천
Automotive Sensor Cluster Digitizers
In automotive body controllers, the ISL26315FVZ-T7A digitizes multiple 0-5 V analog sensors (MAP, MAF, throttle position, oil pressure) over the 12 V battery rail. The 5.25 V AVDD supply tolerates regulated 5 V rails with transient headroom, while the -40 C to +125 C operating range matches automotive underhood requirements. SAR deterministic conversion supports engine management loops that demand fixed-latency sampling across multiple sensor inputs.
추천
IoT Edge Sensor Nodes
IoT edge nodes combine multiple MEMS sensors (accelerometer, gyroscope, magnetometer, pressure) behind a single ADC to minimize cost and pin count. The ISL26315FVZ-T7A's 4-channel input multiplexer handles sensor arrays with sample rates above 100 Hz, while its SPI interface integrates with low-cost Cortex-M0 microcontrollers. The TSSOP-16 footprint suits compact coin-cell-powered sensor beacons reporting over BLE or LoRa, with ADC power-down current under 1 µA between transmissions.
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추천 제품 요약
엔지니어링 참조 데이터: ISL26315FVZ-T7A — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | ISL26312FVZ-T | ISL26311FBZ | ISL26314FVZ | AD7993BRU-0REEL | ADS7822PG4 |
|---|---|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Analog Devices | Texas Instruments |
| Package | 16-TSSOP (FVZ) | 16-TSSOP - same | 16-TSSOP - same | 16-TSSOP - same | 16-TSSOP - same | 16-TSSOP - same |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 10/12 bits | 12 bits |
| Sample Rate | 125 kSPS | 125 kSPS | 125 kSPS | 125 kSPS | 188 kSPS | 200 kSPS |
| Input Channels | 4 single-ended | 2 single-ended | 1 channel | 2 SE / 1 DIFF | 4 single-ended | 1 channel |
| Interface | SPI/QSPI/MICROWIRE | SPI/QSPI/MICROWIRE | SPI/QSPI/MICROWIRE | SPI/QSPI/MICROWIRE | I2C | SPI |
| 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 5.5 V | 2.7 V to 5.25 V |
| INL (max) | ±1 LSB | ±1 LSB | ±1 LSB | ±1 LSB | ±1 LSB | ±1 LSB |
주요 차별점
- Hardware-resettable sequencer eliminates firmware overhead (vs ADS7822PG4)
- Wide 2.7-5.25 V AVDD with 1.68 V DVDD supports mixed-voltage systems (vs AD7993BRU-0REEL)
- Same-brand die family alternatives simplify drop-in migration (vs ISL26312FVZ-T (lower channel count))
설계 노트
Bypass AVDD (pin 13) with a 10 µF tantalum in parallel with a 0.1 µF ceramic placed within 5 mm of the supply pin. DVDD (pin 2) requires a 0.1 µF ceramic only. The internal analog and digital grounds are separated at pins 11/12 (AGND) and pin 5 (DGND); tie them together at a single point under the IC to avoid ground-loop noise injection into the SAR comparator.
Route analog input traces (AIN0-AIN3) as differential pairs with the analog ground, keeping them away from digital SPI lines (SCLK, DOUT, CS, CONVST). The external reference voltage at REF (pin 10) should be driven by a low-impedance buffer (e.g., AD8221 or simple op-amp follower); a high-impedance reference degrades INL during multiplexed acquisition due to dynamic charge injection.
Do not float the SEQ/RESET pin (pin 15) - tie it high for sequencer mode or low for single-channel mode. Floating this pin causes indeterminate channel sequencing. Also, the CONVST input (pin 16) must remain low for at least 8 µs before assertion to allow the internal sample-and-hold to settle; violation degrades linearity and increases THD beyond the ±1 LSB spec.
규정 준수 정보
RoHS compliant per Renesas product page. Not AEC-Q100 qualified; automotive designs should review AEC-Q100 alternatives. Halogen-free status not explicitly stated in retrieved data.
