LTC2365ITS8 - 1Msps 12-Bit Serial SAR ADC in TSOT-23-8 | Analog Devices
MPN: LTC2365ITS8 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.05 | $6.05 |
| 10 | $5.42 | $54.20 |
| 100 | $4.78 | $478.00 |
| 500 | $4.12 | $2,060.00 |
| 1,000 | $3.58 | $3,580.00 |
LTC2365ITS8 Overview
A SAR ADC is a successive-approximation-register analog-to-digital converter that resolves N bits in N clock cycles using a binary-search charge-redistribution DAC. SAR ADCs are valued for their deterministic latency (single-cycle conversion), zero pipeline delay, low power consumption, and excellent DC accuracy at moderate sample rates - characteristics that make them the dominant converter architecture for multiplexed data acquisition, industrial instrumentation, and precision sensor signal chains.
Key features of the LTC2365ITS8 include a 1Msps guaranteed sample rate, 12-bit no-missing-codes resolution, a true bipolar or unipolar software-selectable input range of 0V to VDD or 0V to VREF (where VREF is set by an external reference), 72dB SINAD and -80dB THD at full sample rate, and a power-down mode that reduces supply current to under 1 microamp between conversions. The serial interface is SPI-/MICROWIRE-/QSPI-/DSP-compatible, allowing direct connection to most microcontrollers, FPGAs, and digital signal processors without glue logic.
The 'I' suffix designates the industrial operating-temperature grade (-40C to +85C), and the 'TS8' suffix denotes the 8-pin TSOT-23 (Thin Small Outline Transistor) plastic package. Outstanding AC performance at 1Msps, combined with an extremely small footprint and 2mA supply current, makes the LTC2365ITS8 ideal for compact, battery-powered or isolated data-acquisition modules where board real estate and power dissipation are at a premium.
Typical applications include portable and handheld instrumentation, multi-channel data-acquisition systems (using an external analog multiplexer), isolated industrial sensors and 4-20mA loop digitizers, optical module monitoring, and battery management system (BMS) cell voltage and current monitoring in compact embedded designs.
When designing with the LTC2365ITS8, place the 0.1 microfarad VDD bypass capacitor as close as possible to the supply pin to minimize digital switching noise on the analog rail. Drive the analog input with a low-impedance, low-noise op-amp buffer (such as the AD8628 or AD8031) to avoid gain error and distortion from source impedance, since the ADC's input draw is non-zero during acquisition.
This page synthesizes distributor pricing, drop-in package-and-pin compatible alternatives, and practical design notes that complement the manufacturer datasheet.
Drop-in alternatives for LTC2365ITS8 — 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 LTC2365ITS8 (same form factor and footprint) — differing in Sample Rate, Interface, Operating Temperature, Resolution, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
LTC2365HTS8
✅ Drop-In✓ In Stock
$4.65 / Unit
View Datasheet →LTC2365CTS8
✅ Drop-In✓ In Stock
$5.1 / Unit
View Datasheet →LTC2362ITS8
✅ Drop-In✓ In Stock
$3.58 / Unit
View Datasheet →LTC2361ITS8
✅ Drop-In✓ In Stock
$2.62 / Unit
View Datasheet →LTC2314HTS8-14
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.4 / Unit
View Datasheet →LTC2365ITS8 Maximum Ratings & Electrical Characteristics
| Resolution | 12 bits |
| Sample Rate | 1 Msps |
| Architecture | SAR (Successive Approximation Register) |
| Number of Input Channels | 1 |
| Supply Voltage | 2.35 V to 3.6 V (single 3 V supply) |
| Supply Current | 2 mA typical at 1 Msps |
| Input Voltage Range | 0 V to VDD or 0 V to VREF (external reference) |
| SINAD | 72 dB at 1 Msps |
| THD | -80 dB at 1 Msps |
| Interface | SPI / MICROWIRE / QSPI / DSP-compatible serial |
| Power-Down Current | < 1 microamp between conversions |
| Operating Temperature | -40 C to +85 C (I-grade, industrial) |
| Package | TSOT-23-8 (Thin SOT-23, 8-lead) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant (lead-free #TRMPBF suffix) |
LTC2365ITS8 Pin Configuration
| Pin 1 | REF — Reference voltage input / output (sets ADC full-scale when external reference used) |
| Pin 2 | VDD — Positive supply (2.35 V to 3.6 V) |
| Pin 3 | GND — Ground |
| Pin 4 | SDO — Serial data output (SPI/MICROWIRE-compatible) |
| Pin 5 | SCK — Serial clock input |
| Pin 6 | CS — Chip select (active low) |
| Pin 7 | AIN — Analog input (0 V to VDD or 0 V to VREF) |
| Pin 8 | CNVST — Convert start input (rising edge initiates conversion) |
Typical Applications
LTC2365ITS8 is suitable for 6 applications: Portable Handheld Instrumentation, Multi-Channel Data Acquisition Systems, Isolated Industrial Sensor Digitizers, Battery Management System (BMS) Monitoring, Optical Module Monitoring and Control, Precision Sensor Signal Chains.
Portable Handheld Instrumentation
The LTC2365ITS8's 1 Msps throughput, 2 mA supply current, and tiny TSOT-23-8 footprint make it an excellent fit for battery-powered handheld instrumentation such as digital multimeters, portable oscilloscopes, and field-test data loggers. At 3 V supply and 1 Msps operation the converter draws roughly 6 mW, enabling multi-hour battery life even with continuous sampling. The 12-bit resolution and 72 dB SINAD deliver sufficient dynamic range for measuring sensor signals (thermocouples, RTDs, strain gauges) without aliasing, while the SPI-compatible serial interface mates directly with low-power Cortex-M microcontrollers. Designers should buffer the analog input with a low-noise op-amp such as the AD8628 to avoid source-impedance-induced gain error and distortion.
Recommended
Multi-Channel Data Acquisition Systems
In multi-channel data-acquisition systems, the LTC2365ITS8 is paired with an external analog multiplexer (MUX) to sequentially digitize multiple sensor channels through a single ADC. The converter's deterministic single-cycle SAR latency eliminates the pipeline delay of pipelined ADCs, simplifying channel-to-channel timing alignment. The 1 Msps sample rate supports aggregate throughput of hundreds of ksps per channel after MUX settling time, while the 12-bit resolution is sufficient for industrial process-control loops, HVAC sensor arrays, and PLC analog input modules. The TSOT-23-8 footprint allows dense PCB layouts, and the SPI interface supports easy connection to FPGA-based timing controllers.
Recommended
Isolated Industrial Sensor Digitizers
The LTC2365ITS8 is widely used on the field side of isolated industrial sensor modules where the analog sensor signal must be digitized before crossing the galvanic isolation barrier. Putting the ADC on the sensor side reduces the analog signal path length and improves noise immunity; only the serial SPI data and clock need to cross the digital isolator. The 2 mA supply current and <1 microamp power-down mode are critical for loop-powered 4-20 mA sensor modules. The 0 V to VREF input range accommodates standard industrial signals when paired with an external precision reference such as the ADR01 or ADR02, and the -40 C to +85 C industrial temperature grade suits factory-floor environments.
Recommended
Battery Management System (BMS) Monitoring
Battery management systems for lithium-ion battery packs require compact, low-power ADCs to monitor individual cell voltages, pack current, and temperature with high accuracy. The LTC2365ITS8's 12-bit resolution (4096 LSBs) provides roughly 1.2 mV LSB at a 5 V full-scale range, more than adequate for cell-voltage monitoring of Li-ion cells (typically 2.5 V to 4.2 V). Its 1 Msps throughput supports simultaneous sampling of multiple cell groups through a MUX, while its 2 mA supply current keeps quiescent losses low in large battery packs. The TSOT-23-8 footprint fits within the tight BMS PCB layouts of EV battery modules, and the SPI interface integrates cleanly with battery management controllers.
Recommended
Optical Module Monitoring and Control
SFP/QSFP optical transceiver modules require precise monitoring of laser bias current, average optical power, and temperature through analog feedback loops. The LTC2365ITS8 provides the 12-bit resolution needed for accurate APC (automatic power control) loops in laser drivers, and its 1 Msps sample rate is more than sufficient for the kHz-bandwidth thermal and optical monitoring signals. The small TSOT-23-8 footprint fits within the compact SFP module PCB, and the SPI interface integrates directly with the module's microcontroller. The low 2 mA operating current is critical for the tight power budgets of hot-pluggable optical modules.
Recommended
Precision Sensor Signal Chains
The LTC2365ITS8 is well suited to digitize the output of precision analog sensors such as load cells, strain gauges, pressure transducers, and thermocouples after signal conditioning by instrumentation amplifiers. Its 12-bit resolution and 72 dB SINAD provide more than 70 dB of effective number of bits for clean sensor signals, while the differential-style input range 0 V to VREF simplifies bipolar sensor interfacing when paired with an external reference. The TSOT-23-8 footprint and 2 mA supply current suit compact embedded sensing modules in industrial IoT and smart-sensor edge devices. Designers should add an RC anti-aliasing filter at the ADC input to remove out-of-band noise from switched-mode sensor excitation.
Recommended
Recommended Products Summary
Engineering reference data for LTC2365ITS8 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LTC2365HTS8 | LTC2365CTS8 | LTC2362ITS8 | LTC2361ITS8 |
|---|---|---|---|---|---|
| Brand | 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 |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits |
| Sample Rate | 1 Msps | 1 Msps | 1 Msps | 500 ksps | 250 ksps |
| Supply Current | 2 mA | 2 mA | 2 mA | ~1.5 mA typical | ~1 mA typical |
| SINAD | 72 dB at 1 Msps | 72 dB at 1 Msps | 72 dB at 1 Msps | 72 dB at 500 ksps | 72 dB at 250 ksps |
| Operating Temperature | -40 C to +85 C (I-grade) | -40 C to +125 C (H-grade) | 0 C to +70 C (C-grade) | -40 C to +85 C (I-grade) | -40 C to +85 C (I-grade) |
| Pin-to-Pin Compatible | Reference (TSOT-23-8) | Yes | Yes | Yes | Yes |
Key Differentiators
- Industry-leading 2 mA supply current at 1 Msps in TSOT-23-8 (vs LTC2362ITS8)
- Industrial -40 C to +85 C temperature grade as standard (vs LTC2365CTS8)
- True 12-bit no-missing-codes with deterministic single-cycle latency (vs LTC2361ITS8)
Design Notes
Place a 0.1 microfarad X7R ceramic bypass capacitor as close as possible to the LTC2365ITS8 VDD pin (pin 2), with the trace from the capacitor to the VDD pin kept short and direct. Add a 10 microfarad tantalum or ceramic bulk capacitor nearby to supply the transient currents during conversion. A clean analog ground plane with the AGND pin (pin 3) returned to the same ground as the analog input source prevents digital switching noise from corrupting conversion accuracy.
Drive the analog input (pin 7, AIN) with a low-impedance, low-noise op-amp buffer such as the AD8628 (zero-drift) or AD8031 (low-power). The SAR ADC's input presents a transient load during acquisition; an op-amp with output impedance below 10 ohm at the ADC's sample bandwidth settles the input within the acquisition window and avoids gain error. Add an RC anti-aliasing filter (typically 100 ohm and 1 nF) between the buffer and AIN to limit out-of-band noise to below the Nyquist bandwidth.
Estimated: at 1 Msps with a 50% duty-cycle CNVST signal, the LTC2365ITS8 draws approximately 6 mW from a 3 V supply. Decoupling and grounding must be sufficient to prevent digital switching noise on VDD from coupling into the analog input. Do not exceed VDD + 0.3 V on any input pin; absolute maximum ratings are documented in the LTC2365 datasheet. Avoid long parallel traces between the SCK line and analog signal traces to prevent digital-to-analog crosstalk.
Compliance Information
RoHS and REACH compliance per Analog Devices product page (LTC2365ITS8#TRMPBF suffix indicates lead-free / RoHS-compliant tape-and-reel packaging). Halogen-free status not explicitly stated in retrieved web data; consult Analog Devices environmental compliance documentation. AEC-Q100 not applicable - this is not an automotive-qualified part; for automotive applications consider the H-grade automotive-qualified variants.
