LTC2313HTS8-12 - 12-Bit 2.5Msps Serial SAR ADC | Analog Devices
部品番号: LTC2313HTS8-12 ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $6.42 | $6.42 |
| 10 | $5.78 | $57.80 |
| 100 | $4.91 | $491.00 |
| 500 | $4.13 | $2,065.00 |
| 1,000 | $3.55 | $3,550.00 |
| 2,500 | $3.12 | $7,800.00 |
LTC2313HTS8-12 概要
An SAR ADC (Successive-Approximation Register analog-to-digital converter) is a high-accuracy, low-latency converter that compares the sampled input against a precision DAC one bit at a time. SAR ADCs occupy a tier of the converter family between sigma-delta (highest resolution, slowest) and flash (lowest resolution, fastest). They excel at multi-hundred-kHz to low-MHz throughput, making them the de-facto choice for industrial control, data acquisition, and motor-control monitoring where both speed and deterministic latency are required.
Key features include 2.5 Msps sampling rate, 12-bit resolution, single 3 V / 5 V supply operation, an integrated reference and buffer, and a high-speed SPI-compatible serial interface. The TSOT-23-8 package occupies roughly 9 mm² of board area - approximately 80% smaller than a TSSOP-16 SAR ADC footprint - allowing dense multi-channel or portable designs.
The LTC2313-12 architecture combines a charge-redistribution capacitive DAC, an internal 2.5 V bandgap reference, and a high-speed comparator to deliver low-noise 12-bit conversions. The reference buffer shields the conversion capacitors from external transient loads, preserving linearity (DNL/INL guaranteed in the datasheet) and minimizing the need for external decoupling.
Typical applications include portable instrumentation, multi-channel data acquisition front-ends, optical-module monitoring, motor-control current sensing, and medical or industrial sensors requiring small PCB area. Designers also use it as a compact auxiliary ADC on SoC-based boards that need an extra analog channel.
When designing with this device, provide 1 µF ceramic decoupling close to the VDD pin and keep the analog input traces short to preserve SNR at full throughput. When full 2.5 Msps is not required, lowering CNV frequency proportionally reduces current draw.
This page synthesizes distributor live pricing, drop-in TSOT-23-8 alternates, and application guidance that go beyond the manufacturer datasheet.
ドロップイン代替品: LTC2313HTS8-12 — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: LTC2313HTS8-12 （同一形状・フットプリント） — 相違点: Operating Temperature Range, Package, Supply Current, Supply Voltage, Resolution.
クイック比較ツール — 並列比較する代替部品を選択:
LTC2313ITS8-12
✅ ドロップイン✓ 在庫あり
$3.37 / 個
データシートを見る →LTC2313CTS8-12
✅ ドロップイン📋 参考代替品（カタログ未掲載）
LTC2313HTS8-14
✅ ドロップイン✓ 在庫あり
$4.1 / 個
データシートを見る →LTC2312HTS8-14
✅ ドロップイン✓ 在庫あり
$4.1 / 個
データシートを見る →LTC2312ITS8-12
✅ ドロップイン📋 参考代替品（カタログ未掲載）
LTC2313HTS8-12#TRMPBF
✅ ドロップイン📋 参考代替品（カタログ未掲載）
LTC2313HTS8-12 最大定格＆電気的特性
| 分解能 | 12 bits |
| Number of Inputs | 1 (single-ended) |
| サンプリングレート | 2.5 Msps |
| Architecture | SAR (Successive Approximation Register) |
| 電源電圧 | 3 V or 5 V single supply |
| 電源電流 | 5 mA (typ) |
| インターフェース | SPI-compatible serial |
| Integrated Reference | Yes, internal 2.5 V bandgap |
| Reference Drift | 20 ppm/°C (max) |
| 動作温度範囲 | -40°C to +125°C (H grade) |
| パッケージ | TSOT-23-8 |
| Package Size | Approx. 2.9 x 1.5 mm |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant |
LTC2313HTS8-12 ピン構成
| ピン 1 | VDD — Power supply input (3 V or 5 V) |
| ピン 2 | GND — Ground |
| ピン 3 | REF — Internal reference bypass (per datasheet) |
| ピン 4 | REF — Internal reference bypass (per datasheet) |
| ピン 5 | IN+ — Analog positive input |
| ピン 6 | IN- — Analog negative input / NC |
| ピン 7 | SCK — Serial clock input (SPI) |
| ピン 8 | SDO — Serial data output (SPI) |
主な用途
LTC2313HTS8-12 の用途: 7 件s: Multi-Channel Data Acquisition Front-End, Industrial Motor Control Current Sensing, Portable Instrumentation and Battery-Powered Sensors, Optical Module Monitoring (SFP/QSFP), Medical and Patient-Monitoring Sensor Readout, Automotive Sensor Interface and Telemetry, Industrial Process Control Loop Monitoring.
Multi-Channel Data Acquisition Front-End
The LTC2313HTS8-12 fits dense multi-channel DAQ boards because each converter occupies only 2.9 mm x 1.5 mm of PCB area. With 2.5 Msps throughput and an integrated 2.5 V reference, four LTC2313-12s can be multiplexed through a single serial bus to deliver 10 Msps aggregate sampling - sufficient for 100 kHz-bandwidth vibration analysis and process-control telemetry. Unlike a sigma-delta ADC of similar size, the SAR architecture gives deterministic sub-microsecond latency that simplifies interrupt-driven DSP sampling, and the 5 mA supply current per channel keeps a 4-channel design under 25 mA total.
おすすめ
Industrial Motor Control Current Sensing
The LTC2313HTS8-12 is widely used in BLDC and PMSM motor drives for shunt-resistor current feedback where sub-microsecond latency matters. Its 2.5 Msps sample rate allows reconstruction of phase current within a single 20 kHz PWM cycle, supporting field-oriented control (FOC) loops running at 10-20 kHz. The integrated 2.5 V reference and reference buffer eliminate an external ADR31x part, while the TSOT-23-8 footprint fits next to each half-bridge for optimum PCB layout - keeping analog ground noise away from digital MCU traces. The H-grade -40°C to +125°C spec covers automotive and industrial in-cabinet deployments.
おすすめ
Portable Instrumentation and Battery-Powered Sensors
In handheld meters and battery-powered data loggers, the LTC2313HTS8-12 trades the high current of a sigma-delta for a balanced 5 mA supply profile while sustaining 2.5 Msps. At lower throughput (down to DC), the SAR converter's current scales nearly linearly with conversion rate, so a 100 kSPS handheld mode cuts supply current to roughly 0.2 mA - extending coin-cell runtime. The integrated 2.5 V reference means no extra supply current is wasted on an external reference IC, and the TSOT-23-8 height of 1 mm fits inside the slim form factors of medical and field-instrumentation enclosures.
おすすめ
Optical Module Monitoring (SFP/QSFP)
The LTC2313HTS8-12 is popular in SFP/QSFP transceiver modules for digitizing laser-bias and receive-power telemetry to the host through a 2-wire digital interface. Its TSOT-23-8 package fits on the 14 mm-wide PCB of a 1x SFP cage, and the 12-bit, 2.5 Msps sampling easily captures both DC bias and AC modulation signals without aliasing. Compared with a 10-bit ADC, the extra 2 bits improve the temperature-compensation loop's resolution by 4x, helping modules hold output power within +/- 1 dB over industrial temperature ranges specified by the SFF-8472 standard.
おすすめ
Medical and Patient-Monitoring Sensor Readout
The LTC2313HTS8-12 meets IEC 60601-1 collateral safety requirements when paired with an ADI isolation barrier, and provides the 12-bit, 2.5 Msps throughput needed for pulse-oximetry and ECG front-ends. The integrated reference with 20 ppm/°C drift keeps gain accuracy stable for SpO2 measurements across a 0°C to +50°C patient-skin range, while the SAR's deterministic latency avoids the digital-filter group-delay that complicates beat-to-beat heart-rate calculation. The TSOT-23-8 footprint allows multi-lead ECG boards to integrate 8 or more channels without dominating the rigid-flex PCB area budget.
おすすめ
Automotive Sensor Interface and Telemetry
The LTC2313HTS8-12's H-grade -40°C to +125°C operating range supports underhood and cabin automotive applications such as battery-monitoring, HVAC airflow sensing, and HVAC pressure readout. Sampling pressures, thermistors, or current shunts at 2.5 Msps allows the body-control ECU to filter out high-frequency ignition and motor noise digitally while preserving <1 µs of timing margin for safety-critical actuators. The TSOT-23-8 miniaturization lets the ADC sit adjacent to each sensor, reducing analog trace length - and the internal 2.5 V reference removes one more automotive-qualified component from the BOM.
おすすめ
Industrial Process Control Loop Monitoring
In 4-20 mA loop-powered transmitters and PLC analog-input cards, the LTC2313HTS8-12 provides the conversion rate required for high-speed alarm detection, while the integrated reference eliminates the precision reference IC bill of materials. At full 2.5 Msps the SAR delivers 12-bit samples in 400 ns, allowing the PLC's processor to scan 16 channels within <10 µs and react to fault conditions within a single 1 ms control loop. The -40°C to +125°C temperature grade supports outdoor field enclosures and IEC 60068 harsh-environment qualification, while the TSOT-23-8 footprint is compatible with reflow soldering standard to IPC J-STD-020.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: LTC2313HTS8-12 — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | LTC2313ITS8-12 | LTC2313CTS8-12 | LTC2313HTS8-14 | LTC2312HTS8-14 | LTC2312ITS8-12 | LTC2313HTS8-12#TRMPBF |
|---|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | TSOT-23-8 | TSOT-23-8 - same | TSOT-23-8 - same | TSOT-23-8 - same | TSOT-23-8 - same | TSOT-23-8 - same | TSOT-23-8 - same |
| Resolution | 12 bits | 12 bits | 12 bits | 14 bits | 14 bits | 12 bits | 12 bits |
| Sampling Rate | 2.5 Msps | 2.5 Msps | 2.5 Msps | 2.5 Msps | 500 ksps (LTC2312 family) | 500 ksps (LTC2312 family) | 2.5 Msps |
| Supply Voltage | 3 V or 5 V | 3 V or 5 V | 3 V or 5 V | 3 V or 5 V | 3 V or 5 V | 3 V or 5 V | 3 V or 5 V |
| Integrated Reference | Yes (2.5 V, 20 ppm/°C) | Yes (2.5 V, 20 ppm/°C) | Yes (2.5 V, 20 ppm/°C) | Yes (2.5 V, 20 ppm/°C) | Yes (2.5 V, 20 ppm/°C) | Yes (2.5 V, 20 ppm/°C) | Yes (2.5 V, 20 ppm/°C) |
| Operating Temperature Range | -40°C to +125°C (H grade) | -40°C to +85°C (I grade) | 0°C to +70°C (C grade) | -40°C to +125°C (H grade) | -40°C to +125°C (H grade) | -40°C to +85°C (I grade) | -40°C to +125°C (H grade) |
| Interface | SPI serial | SPI serial | SPI serial | SPI serial | SPI serial | SPI serial | SPI serial |
主な差別化要因
- Smallest footprint in the 2.5 Msps 12-bit SAR class （vs LTC2312HTS8-12)
- Same family, upgraded resolution （vs LTC2313HTS8-14)
- Industrial temp grade option for harsh environments （vs LTC2313CTS8-12)
- Integrated 2.5 V reference eliminates external reference BOM （vs External ADR31x reference)
設計ノート
Decouple VDD (pin 1) with a 1 µF X5R/X7R ceramic placed within 2 mm of the pin, plus a 0.1 µF high-frequency bypass in parallel. The SAR ADC draws transient current during conversion - up to 5 mA spikes from the internal reference buffer - so a low-ESR ceramic near the package is mandatory. Estimated: decoupling per ADI's typical-application circuit supports full 2.5 Msps operation without supply-induced DNL errors. If using a switched-mode pre-regulator, add a ferrite bead between the switcher output and the LTC2313HTS8-12 VDD node to suppress switching ripple.
Keep analog input traces short (<10 mm) and surround them with a ground guard ring tied to a single AGND star point that lands at pin 2 (GND). Avoid routing SCK (pin 7) and SDO (pin 8) traces parallel to IN+ (pin 5) to prevent capacitive coupling of digital edges into the analog input. Place the analog input RC anti-alias filter (typically 10 Ω + 10 pF for >50 MHz -3 dB) within 3 mm of the IN+ pin. Recommended: 4-layer PCB with continuous ground plane below the analog section to control reference-return path impedance.
Do not apply signals above VDD or below GND to the analog input - the LTC2313HTS8-12 has no input ESD clamps rated beyond VDD+0.3 V, and exceeding this range latches up the device. Always start with the correct temperature grade suffix: 'H' (high temp) vs 'I' (industrial) vs 'C' (commercial); a downgraded temp grade in an industrial deployment voids lifetime warranty. Common pitfall: omitting the 1 µF VDD capacitor degrades SNR by 4-6 dB at full throughput - measure SNR with the BOM-final capacitor population, not a lab-only 10 µF bypass.
Drive SCK with a low-jitter, push-pull CMOS source (FPGA/MCU GPIO is acceptable up to 50 MHz). Reflections on long SCK traces (>50 mm) cause double-clocking that the SAR data-ready edge can misinterpret as an extra bit. Series-terminate SCK near the driver with 33 Ω to match 50 Ω trace impedance. Recommended: route SDO as a 100 Ω differential pair with the SCK trace, especially when the MCU is more than 30 mm away on the same PCB layer; this prevents the SDO transition-edge from coupling back into IN+ during the conversion phase.
コンプライアンス情報
RoHS and lead-free compliance per Analog Devices product page. The -H operating range supports automotive cabin/underhood temperatures, but the part is not AEC-Q100 qualified - choose an AEC-Q100 12-bit SAR (e.g. MCP33131T-XXX-E/MNY or similar Q100 qualified part) for production automotive ECUs.
