LTC2366ITS8 - 12-Bit 3Msps Serial SAR ADC | Analog Devices
MPN: LTC2366ITS8 ✓ Hoạt độngLTC2366ITS8 Tóm tắt
A SAR ADC (Successive Approximation Register Analog-to-Digital Converter) is a type of data converter that performs a binary search against the analog input using an internal DAC and comparator, producing one conversion per N bit-clock cycles. SAR ADCs are valued in precision data-acquisition systems because they sample the input on a single aperture, exhibit zero pipeline latency, and provide excellent DC accuracy with low power consumption - ideal attributes when a system must respond to multiplexed or transient analog events without delay. The LTC2366 family sits within the SAR ADC hierarchy: ADC -> data converter -> signal chain IC -> mixed-signal semiconductor.
Key features of the LTC2366 include a high dynamic range sample-and-hold front end, automatic Nap and Sleep power-down modes between conversions, a dedicated REF pin for an external reference, and an SDO line that goes high-impedance when CS is de-asserted to allow multiple parts to share a SPI bus. The TSOT-23-8 footprint is among the smallest available for any 12-bit ADC in this speed class, enabling dense multi-channel data-acquisition front ends on compact PCBs.
Architecturally the LTC2366 combines a charge-redistribution DAC array with a low-noise comparator and on-chip clock generator. The external reference (typically 2.5 V or 3.0 V) sets full-scale range; the wide-input-tolerance single-supply design simplifies power-tree design in 3.3 V systems. Latency is one conversion cycle, with throughput controlled by the SCK frequency and CS framing.
Typical applications include portable instrumentation, isolated data acquisition, multi-channel multiplexed sensor front ends, motor control feedback loops, optical sensor read-out, and process-control analog input modules. Industrial automation modules and battery-powered handheld meters benefit from its low 2.6 mA active current and sub-microamp Sleep mode. The wide SINAD margin also allows direct connection to high-impedance bridge sensors or audio-bandwidth signal sources when paired with appropriate input buffers.
When designing with this part, ensure the reference bypass network uses a high-quality ceramic capacitor close to the REF pin to avoid conversion noise, and keep the SCK trace impedance-controlled to prevent coupling into the analog input. The Nap/Sleep duty-cycle can be tuned to average supply current well below the active 2.6 mA figure for duty-cycled battery systems.
This page synthesizes distributor pricing, drop-in alternatives drawn from the same LTC236x family and competitor parametric equivalents, and practical PCB design notes that are not collated in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho LTC2366ITS8 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với LTC2366ITS8 (cùng hình factor và footprint) — khác nhau ở Package, Sample Rate, Supply Voltage, Resolution, Architecture.
LTC2365ITS8
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2366ITS8#TRPBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC2366ITS8#TRMPBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC2366CTS8#TRMPBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC2361ITS8
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →LTC2366ITS8 Tỷ lệ tối đa & tính chất điện
| Part Number | LTC2366ITS8 |
| Manufacturer | Analog Devices (formerly Linear Technology) |
| Độ phân giải | 12 bit |
| Cấu trúc | SAR (Successive Approximation Register) |
| Sample Rate | 3 Msps |
| Number of Channels | 1 input |
| Điện áp cung cấp | 2.35 V to 3.6 V (single supply, 3 V nominal) |
| Điện áp cung cấp | 2.6 mA at 3 Msps (3 V supply) |
| Input Range | 0 V to VDD (unipolar, true ground-referenced) |
| SINAD | 72 dB at 3 Msps |
| THD | -80 dB at 3 Msps |
| Giao diện | Serial SPI / QSPI / MICROWIRE-compatible |
| Power-Down Modes | Nap and Sleep modes |
| Hộp | TSOT-23-8 |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
| Khoảng nhiệt độ hoạt động | -40C to +85C (industrial) |
Cấu hình chân LTC2366ITS8
| Chân 1 | VDD — Analog supply input (2.35 V to 3.6 V) |
| Chân 2 | IN+ — Analog input (0 V to VDD unipolar) |
| Chân 3 | GND — Analog ground |
| Chân 4 | REF — External reference input (sets full-scale) |
| Chân 5 | SCK — Serial clock input |
| Chân 6 | SDO — Serial data output (high-Z when CS high) |
| Chân 7 | CS — Chip select input (active low) |
| Chân 8 | GND — Analog ground |
Ứng dụng tiêu biểu
LTC2366ITS8 phù hợp cho 6 Áp dụngs: Portable Battery-Powered Instrumentation, Multi-Channel Sensor Data Acquisition, Motor Control Feedback Loop, Optical Sensor Readout, Industrial Process Control Analog Input Modules, Audio-Bandwidth Signal Capture.
Portable Battery-Powered Instrumentation
The LTC2366ITS8 fits portable battery-powered instrumentation by combining 12-bit resolution at 3 Msps with only 2.6 mA supply current on a 3 V rail. When used as the analog front-end of a handheld multimeter or data logger, its Nap and Sleep modes allow the system controller to duty-cycle conversions and drop average current below 100 uA between samples. The TSOT-23-8 footprint is among the smallest available for any 12-bit ADC in this speed class, freeing PCB area for the battery, display, and user interface. Compared with 16/18-bit ADCs in the same class, the LTC2366ITS8 offers a deliberate trade-off: lower resolution in exchange for higher sample rate and lower power.
Được đề xuất
Multi-Channel Sensor Data Acquisition
The LTC2366ITS8's SDO line goes high-impedance when CS is de-asserted, enabling multiple parts to share a single SPI bus in multi-channel multiplexed data-acquisition front ends. Its 72 dB SINAD at 3 Msps provides ample dynamic range for thermocouple, strain gauge, and process-control analog signals when paired with a low-noise input buffer. The 0 V to VDD true-ground-referenced input eliminates the need for bipolar biasing networks, simplifying signal-chain design in industrial sensor modules. The 3 Msps throughput is also sufficient for vibration monitoring, where sampling above Nyquist of audio-bandwidth mechanical resonances is critical.
Được đề xuất
Motor Control Feedback Loop
The LTC2366ITS8's 3 Msps sample rate and one-cycle SAR latency make it a strong fit for current-sense feedback loops in BLDC and PMSM motor drives. By sampling the shunt or Hall-sensor-derived current at 3 Msps, the digital controller has enough fresh data per PWM cycle to compute precise torque commands without oversampling-induced aliasing. The single 3 V supply rail integrates naturally with 3.3 V logic-level DSP or MCU controllers. The 8-pin TSOT-23 footprint allows the ADC to be placed adjacent to the current-sense amplifier, minimizing trace-length noise pickup near the high-di/dt switching node.
Được đề xuất
Optical Sensor Readout
The LTC2366ITS8 is well-suited to optical sensor readout applications such as photodiode arrays, light meters, and optical encoders, where its 72 dB SINAD and -80 dB THD preserve signal fidelity across a wide dynamic range. The 0 V to VDD input range aligns naturally with photodiode transimpedance amplifier outputs biased around ground. At 3 Msps the part can sample multi-channel photodiode arrays via external multiplexer switching, building a compact spectrometer-grade data-acquisition channel. The TSOT-23-8 footprint enables placement directly under the sensor, shortening analog trace lengths and reducing EMI pickup.
Được đề xuất
Industrial Process Control Analog Input Modules
The LTC2366ITS8 is qualified for industrial process-control analog input modules thanks to its -40C to +85C industrial temperature range and RoHS compliance. Its single-supply 2.35 V to 3.6 V operation matches 3.3 V industrial backplanes, eliminating the need for additional negative rails. The 12-bit resolution is sufficient for 4-20 mA loop digitization, thermocouple cold-junction compensation, and 0-10 V process signal capture when paired with input protection networks. The 3 Msps throughput also enables simultaneous sampling of multiple process variables via external multiplexers, simplifying PLC and DCS analog input card design.
Được đề xuất
Audio-Bandwidth Signal Capture
With -80 dB THD at 3 Msps, the LTC2366ITS8 is well-suited for audio-bandwidth signal capture up to the full Nyquist bandwidth, suitable for sub-Nyquist audio sampling in test and measurement instruments. While its 12-bit resolution is below audiophile 16/24-bit DAC standards, the part is a strong fit for acoustic measurement microphones, sonar hydrophone arrays, and audio-bandwidth vibration analyzers where the goal is data capture rather than playback fidelity. The 0 V to VDD input range accepts DC-coupled audio signals directly from bias-biased microphone pre-amplifiers.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho LTC2366ITS8 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | LTC2365ITS8 | LTC2366ITS8#TRPBF | LTC2366ITS8#TRMPBF | LTC2366CTS8#TRMPBF | LTC2361ITS8 |
|---|---|---|---|---|---|---|
| Package | TSOT-23-8 | TSOT-23-8 - same | TSOT-23-8 - same | TSOT-23-8 - same | TSOT-23-8 - same | TSOT-23-8 - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit |
| Sample Rate | 3 Msps | 1 Msps | 3 Msps | 3 Msps | 3 Msps | 250 ksps |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | 0C to +70C | -40C to +85C |
| Interface | SPI/QSPI/MICROWIRE | SPI/QSPI/MICROWIRE | SPI/QSPI/MICROWIRE | SPI/QSPI/MICROWIRE | SPI/QSPI/MICROWIRE | SPI/QSPI/MICROWIRE |
| Input Range | 0 V to VDD | 0 V to VDD | 0 V to VDD | 0 V to VDD | 0 V to VDD | 0 V to VDD |
Bảo phân biệt quan trọng
- Full 3 Msps throughput at 2.6 mA on single 3 V supply (vsLTC2365ITS8)
- Industrial temperature grade qualification (vsLTC2366CTS8#TRMPBF)
- Industry-standard 72 dB SINAD at 3 Msps (vsLTC2361ITS8)
Ghi chú thiết kế
The LTC2366ITS8 draws 2.6 mA at 3 Msps from a 3 V supply. The Nap and Sleep power-down modes allow the host controller to duty-cycle conversions for battery-powered applications. Place a 0.1 uF ceramic decoupling capacitor as close as possible to the VDD pin (pin 1), and add a 10 uF bulk capacitor on the supply rail. When operating in Sleep mode between conversions, the SCK line must remain idle for the part to fully enter low-power state.
Route the analog input IN+ (pin 2) and reference REF (pin 4) traces away from the SCK (pin 5), SDO (pin 6), and CS (pin 7) digital lines to prevent coupling. Use a ground plane on layer 2 to provide a low-impedance return path for both analog and digital currents. Place the REF bypass capacitor (typically 10 uF ceramic in parallel with 0.1 uF) directly at pin 4 - reference stability is the dominant contributor to conversion noise.
Do not leave the CS pin floating; tie it to a logic controller output or pull it high during reset to keep the SDO line in high-impedance state. When chaining multiple LTC2366 parts on a single SPI bus, ensure only one CS is asserted at a time. Avoid driving SCK faster than the maximum rated frequency when operating at the high end of the supply voltage range - SCK edge timing degrades with higher supply.
Thông tin tuân thủ
RoHS compliant per Analog Devices product page. Lead-free (Pb-free) finish per the #TRPBF suffix. AEC-Q100 not applicable - this part is not automotive-qualified; choose an AEC-Q100 part for automotive applications.
