LTC2361HTS8 - 250ksps 12-Bit SAR ADC | Analog Devices
MPN: LTC2361HTS8 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.86 | $4.86 |
| 10 | $4.32 | $43.20 |
| 100 | $3.78 | $378.00 |
| 500 | $3.29 | $1,645.00 |
| 1,000 | $2.85 | $2,850.00 |
LTC2361HTS8 Overview
A SAR ADC is a type of data converter that uses a binary search algorithm and a capacitive DAC to digitize an analog input. SAR converters are valued for low latency (single-cycle conversion), deterministic behavior, and high dynamic performance at moderate sample rates. The LTC2361 belongs to the broader data converter (ADC) family, which sits within the signal chain hierarchy of analog mixed-signal ICs, ultimately serving precision measurement, industrial, and instrumentation systems.
Key features of the LTC2361HTS8 include 12-bit resolution with no missing codes, an SPI/MICROWIRE-compatible serial interface, automatic power-down between conversions to reduce average current, and a small TSOT-23-8 footprint that enables high-density PCB designs. The LTC2360/LTC2361/LTC2362 family shares the same die and pinout across 100/250/500 ksps, allowing the same layout to be reused for different speed grades. The device accepts a 0 V to VDD or 0 V to VREF full-scale input, which suits single-ended sensor interfaces.
The internal architecture combines a precision sample-and-hold front-end with a charge-redistribution SAR core, a high-bandwidth internal reference buffer, and on-chip conversion clock generation. The serial data output (SDO) and serial clock (SCK) use a simple three-wire interface that connects directly to microcontrollers, DSPs, and FPGAs, while the automatic nap mode between conversions reduces average power consumption at lower throughput rates.
Typical applications for the LTC2361HTS8 include portable instrumentation, data acquisition front-ends, battery monitoring, industrial process control loops, and isolated sensor signal conditioning. The wide supply range and low current draw also make it suitable for low-power remote monitoring and energy-harvesting systems.
When designing with the LTC2361HTS8, observe the input driving requirements in the manufacturer datasheet — the S/H front-end has specific acquisition-time and source-impedance constraints. A low-impedance buffer or op-amp driver is often required to reach the rated THD and SNR performance; a poor driver will noticeably degrade the converter's effective resolution.
This page synthesizes distributor pricing, drop-in alternatives drawn from the LTC2360/2361/2362 same-package family, and practical design notes not found in the manufacturer datasheet, providing a one-stop engineering reference for selecting the LTC2361HTS8.
Drop-in alternatives for LTC2361HTS8 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with LTC2361HTS8 (same form factor and footprint) — differing in RoHS Status, Supply Voltage, Input Type, Resolution, Sample Rate.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
LTC2360HTS8
✅ Drop-In✓ In Stock
$3.78 / Unit
View Datasheet →LTC2362HTS8
✅ Drop-In✓ In Stock
$4.12 / Unit
View Datasheet →LTC2312HTS8-12
✅ Drop-In✓ In Stock
$4.18 / Unit
View Datasheet →LTC2313HTS8-14
✅ Drop-In✓ In Stock
$4.1 / Unit
View Datasheet →LTC2314HTS8-14
✅ Drop-In✓ In Stock
$4.4 / Unit
View Datasheet →LTC2361HTS8 Maximum Ratings & Electrical Characteristics
| Manufacturer | Analog Devices Inc. (formerly Linear Technology) |
| MPN | LTC2361HTS8 |
| Function | 12-bit SAR Analog-to-Digital Converter (ADC) |
| Number of Channels | 1 |
| Resolution | 12 bit |
| Sample Rate | 250 ksps |
| Input Type | Single-Ended, Unipolar (0 V to VDD or 0 V to VREF) |
| Supply Voltage (Analog/Digital) | 2.35 V to 3.6 V |
| Supply Current (typ) | 0.75 mA at 250 ksps |
| Reference | External VREF or internal VDD |
| Data Interface | SPI / MICROWIRE-compatible serial |
| Package / Case | TSOT-23-8 |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 C to +85 C (HTS8 industrial grade) |
| RoHS Status | Compliant (per #PBF / #TRPBF suffix ordering) |
| Lead-Free | Yes (PBF suffix indicates lead-free) |
LTC2361HTS8 Pin Configuration
| Pin 1 | CH1 / IN+ — Analog input channel 1 (single-ended positive input) |
| Pin 2 | VDD — Power supply, 2.35 V to 3.6 V |
| Pin 3 | GND — Ground reference |
| Pin 4 | VREF — Reference voltage input (0 V to VDD full-scale) |
| Pin 5 | SDO — Serial data output (SPI/MICROWIRE-compatible) |
| Pin 6 | SCK — Serial clock input |
| Pin 7 | CNV — Convert / Chip Select input (rising edge starts conversion) |
| Pin 8 | GND — Ground reference (or NC per variant marking) |
Typical Applications
LTC2361HTS8 is suitable for 6 applications: Portable Data Acquisition Front-End, Battery Monitoring & Management, Industrial Process Control Loops, Medical & Patient Monitoring, Isolated Sensor Signal Conditioning, Energy Harvesting & Remote Sensing.
Portable Data Acquisition Front-End
The LTC2361HTS8 fits portable data-acquisition front-ends because of its 12-bit resolution, 250 ksps throughput, and 0.75 mA supply current. The 2.35-3.6 V single-supply range matches 3.3 V LDO rails, while the TSOT-23-8 footprint minimizes board area in handheld instruments. The SPI-compatible serial interface connects directly to low-power Cortex-M microcontrollers, and the automatic power-down between conversions reduces average current in battery-powered logging systems. The 0 V to VREF input range is well suited to sensor outputs conditioned by a low-noise op-amp buffer.
Recommended
Battery Monitoring & Management
The LTC2361HTS8 suits battery-monitoring applications because of its low supply current (0.75 mA) and wide 2.35-3.6 V supply range, which lets the ADC share the battery rail. Its 12-bit resolution and 0 V to VREF input range is well-matched to current-sense amplifier outputs from a hall-effect or shunt sensor, and the SAR architecture provides single-cycle conversion latency critical for cell-balancing loops. The 250 ksps sample rate easily captures fast transients during charge/discharge cycles while keeping average power low thanks to automatic nap mode.
Recommended
Industrial Process Control Loops
The LTC2361HTS8 fits industrial process-control loops because of its 12-bit resolution, ±1 LSB INL typical, and robust SAR architecture that delivers deterministic latency for PID control feedback. The 2.35-3.6 V supply range is compatible with industrial 3.3 V sensor interfaces, and the TSOT-23-8 small footprint enables high-density analog front-end designs. Its SPI interface easily bridges to PLC controllers or industrial microcontrollers, while the wide -40 to +85 C operating temperature range handles factory-floor environments.
Recommended
Medical & Patient Monitoring
The LTC2361HTS8 suits medical and patient-monitoring designs because of its 12-bit resolution and 0.75 mA supply draw, which enables battery-powered wearable devices. The SAR architecture provides single-shot, deterministic conversion ideal for capturing physiological events such as ECG or pulse oximetry waveforms. The compact TSOT-23-8 package and 2.35-3.6 V supply range match lithium-polymer battery rails, and the SPI interface connects to low-power microcontrollers commonly used in medical IoT devices.
Recommended
Isolated Sensor Signal Conditioning
The LTC2361HTS8 is a strong fit for isolated sensor signal conditioning because of its compact TSOT-23-8 footprint and 2.35-3.6 V supply range, which can be powered from an isolated DC/DC converter secondary. Its 12-bit resolution and 0 V to VREF input range are well-matched to amplified bridge-sensor or strain-gauge outputs on the isolated side, and the SPI interface is easily bridged across an isolation barrier using digital isolators. The 250 ksps throughput comfortably captures vibration and load-cell signals.
Recommended
Energy Harvesting & Remote Sensing
The LTC2361HTS8 fits energy-harvesting and remote-sensing nodes because of its 0.75 mA supply current, automatic power-down between conversions, and 2.35-3.6 V supply range that is compatible with small solar or thermoelectric harvesters. The SAR architecture provides single-cycle conversion with no pipeline delay, ideal for wake-and-measure duty cycles. Its TSOT-23-8 package and SPI interface enable compact wireless sensor nodes that pair naturally with low-power transceivers for IoT telemetry.
Recommended
Recommended Products Summary
Engineering reference data for LTC2361HTS8 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LTC2360HTS8 | LTC2362HTS8 | LTC2312HTS8-12 | LTC2313HTS8-14 | LTC2314HTS8-14 |
|---|---|---|---|---|---|---|
| Brand | 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) |
| Resolution | 12 bit | 12 bit (same) | 12 bit (same) | 12 bit (same) | 14 bit | 14 bit |
| Sample Rate | 250 ksps | 100 ksps | 500 ksps | 500 ksps | 500 ksps | 450 ksps |
| Supply Voltage | 2.35 V to 3.6 V | 2.35 V to 3.6 V (same) | 2.35 V to 3.6 V (same) | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V |
| Supply Current (typ) | 0.75 mA | 0.5 mA | 1.1 mA | 1.1 mA | 1.1 mA | 1.1 mA |
| Data Interface | SPI / MICROWIRE | SPI / MICROWIRE (same) | SPI / MICROWIRE (same) | SPI (same family) | SPI (same family) | SPI (same family) |
| Channels | 1 | 1 (same) | 1 (same) | 1 (same) | 1 (same) | 1 (same) |
Key Differentiators
- Balanced throughput-versus-power in a single TSOT-23-8 package (vs LTC2360HTS8 / LTC2362HTS8)
- Lower sample rate than LTC2362HTS8 reduces current draw by ~32% (vs LTC2362HTS8)
- 12-bit resolution with same pinout as 14-bit LTC2313HTS8-14 (vs LTC2313HTS8-14)
Design Notes
The analog input source impedance directly impacts the SAR converter's acquisition time. With a 250 ksps sample rate and 1.5 MHz internal acquisition window, the source impedance should be kept below 200 ohm to settle within 1 LSB at 12 bits. A poor driver or excessive series resistance will show up as gain error, INL, and noise. Place the input buffer (e.g., AD8021 or LT1028) as close to the CH1 pin as possible, with a 1 nF to 10 nF external hold-capacitor-reset capacitor only if recommended in the datasheet.
Place a 0.1 uF ceramic decoupling capacitor within 1-2 mm of the VDD pin and a 10 uF bulk capacitor on the same node. The TSOT-23-8 has a center GND thermal pad and exposed lead frame; provide a continuous ground pour on the top layer under the package, stitched to the bottom-layer ground plane with multiple vias, to minimize digital-return-current noise coupling into the analog input. Keep digital lines (SCK, SDO, CNV) routed away from the CH1 input trace and VREF pin to avoid digital kickback glitches.
Although the LTC2361 only draws 0.75 mA in active conversion, the automatic power-down current drops to a few microamps between conversions. At lower effective sample rates (e.g., 1 ksps), the average current is dominated by the wake-and-convert cycle and can be far less than 0.75 mA. For battery-powered designs, a low-quiescent LDO such as the LT3010 or LT3009 on the analog supply and a separate digital-rail LDO on the microcontroller's IO supply help to minimize digital noise coupling into the analog front-end.
Compliance Information
RoHS compliance per #PBF / #TRPBF suffix ordering. Not AEC-Q100 qualified (industrial grade only).
