LTC2313HTS8-14 - 14-bit 2.5Msps SAR ADC in TSOT-23-8 | Analog Devices
MPN: LTC2313HTS8-14 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.96 | $8.96 |
| 10 | $7.62 | $76.20 |
| 100 | $6.45 | $645.00 |
| 500 | $5.4 | $2,700.00 |
| 1,000 | $4.55 | $4,550.00 |
| 2,500 | $4.1 | $10,250.00 |
LTC2313HTS8-14 Overview
A SAR ADC is a successive-approximation-register analog-to-digital converter - a type of ADC that uses a binary-search algorithm against an internal precision DAC to resolve each conversion in N clock cycles, combining low latency with excellent DC accuracy. SAR ADCs sit in the precision-data-acquisition tier of the converter hierarchy: SAR -> ADC -> data converter -> signal chain IC -> semiconductor. They offer no pipeline delay, deterministic sampling, and high dc accuracy, but at sample rates lower than pipeline ADCs.
The key features of the LTC2313HTS8-14 include guaranteed 14-bit no-missing-codes performance, a high-speed SPI-compatible serial interface that natively supports 1.8 V, 2.5 V, 3 V and 5 V logic, true single-supply operation from 3 V to 5 V (5 V typical), and a wide -40 °C to +125 °C operating range (H-grade). The device achieves 2.5 Msps throughput with no cycle latency, making it suitable for multiplexed or single-channel high-speed acquisition. Its integrated reference buffer eliminates the need for external decoupling on the REFCOMP pin, simplifying layout.
At the architectural level, the LTC2313HTS8-14 uses a charge-redistribution SAR core with an internally compensated reference buffer. The internal reference is trimmed to 2.5 V nominal with 20 ppm/°C maximum drift, providing ±0.2 % initial accuracy across temperature. The SAR core delivers one conversion per 16 SCK cycles (14 bit plus two dummy bits), and the SCK is independent of the sampling clock, allowing easy interface to MCUs, FPGAs, or DSPs running at any serial clock rate up to ~50 MHz.
Typical applications include industrial process control and instrumentation, automotive sensor acquisition (H-grade makes this part ideal for under-hood and chassis systems), medical monitoring and diagnostics, multi-channel data-acquisition systems, battery-powered portable instruments, and loop-powered 4-20 mA sensor transmitters. In each of these, the LTC2313HTS8-14's small footprint, low 5 mA supply current, and wide temperature range make it an attractive precision ADC choice.
When designing with this part, place 10 µF ceramic bypass capacitors on VDD and REFCOMP as close to the pins as possible; use a low-impedance ground return for the GND pin; and route the analog inputs (IN+, IN-) as a differential pair with a common-mode bypass cap. The integrated reference eliminates external reference selection headaches but reduces flexibility compared to ADCs with an external reference input.
This page synthesizes ADI datasheet figures, distributor pricing as of 2026-10-13, drop-in and pin-compatible alternatives within the SAR ADC family, and practical design guidance not duplicated in the manufacturer datasheet.
Drop-in alternatives for LTC2313HTS8-14 — 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 LTC2313HTS8-14 (same form factor and footprint) — differing in RoHS Status, Supply Current, Package, Supply Voltage, Sampling Rate.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
LTC2313ITS8-14
✅ Drop-In📋 Reference alternative (not in catalog)
LTC2313CTS8-14
✅ Drop-In✓ In Stock
$5.45 / Unit
View Datasheet →LTC2312HTS8-14
✅ Drop-In✓ In Stock
$4.1 / Unit
View Datasheet →LTC2309IF
✅ Drop-In✓ In Stock
$9.5 / Unit
View Datasheet →ADS7042IDBVR
✅ Drop-In📋 Reference alternative (not in catalog)
AD7091R-2BRUZ
✅ Drop-In✓ In Stock
$1.83 / Unit
View Datasheet →LTC2313HTS8-14 Maximum Ratings & Electrical Characteristics
| Resolution | 14 bits |
| Sample Rate | 2.5 Msps |
| Architecture | SAR (Successive Approximation Register) |
| Number of Input Channels | 1 (single-ended/differential) |
| Supply Voltage | 3 V to 5 V (single supply, 5 V typical) |
| Supply Current | 5 mA at 2.5 Msps |
| Input Type | Pseudo-differential (IN+, IN-) |
| Internal Reference | 2.5 V nominal, 20 ppm/°C max drift |
| Serial Interface | SPI-compatible SCK/SDO/SDI/CSF, supports 1.8 V/2.5 V/3 V/5 V logic |
| No-Missing-Codes Performance | 14 bits guaranteed |
| Latency | 0 conversion latency |
| Operating Temperature Range | -40 °C to +125 °C (H-grade) |
| Package | TSOT-23-8 (HTS8) |
| Mounting Type | Surface Mount |
| MSL Level | 1 (per JEDEC J-STD-020) |
| RoHS Status | Compliant |
| Conversion Cycles | 16 SCK per conversion (14-bit plus 2 dummy bits) |
LTC2313HTS8-14 Pin Configuration
| Pin 1 | REFCOMP — Reference buffer output; bypass with 10 µF ceramic capacitor to GND |
| Pin 2 | VDD — 3 V to 5 V analog supply input; bypass with 10 µF ceramic to GND |
| Pin 3 | GND — Analog and digital ground return |
| Pin 4 | IN+ — Positive analog input (pseudo-differential) |
| Pin 5 | IN- — Negative analog input; tie to common-mode voltage |
| Pin 6 | SCK — Serial clock input; 1.8 V / 2.5 V / 3 V / 5 V logic compatible |
| Pin 7 | SDO — Serial data output; data transitions on SCK falling edge |
| Pin 8 | CSF — Chip-select / frame input (active low); initiates conversion on falling edge |
Typical Applications
LTC2313HTS8-14 is suitable for 6 applications: Industrial Process Control & Instrumentation, Automotive Sensor Acquisition, Medical Monitoring & Diagnostics, Multi-Channel Data Acquisition Systems, Battery-Powered Portable Instruments, Loop-Powered 4-20 mA Sensor Transmitters.
Industrial Process Control & Instrumentation
The LTC2313HTS8-14 fits industrial process control loops by combining 14-bit no-missing-codes accuracy with 2.5 Msps throughput, supporting multi-channel multiplexed acquisition of 4-20 mA-derived sensor voltages. Its 5 mA supply current keeps loop-powered transmitter thermal budgets low, while the -40 °C to +125 °C H-grade rating covers outdoor, panel-mount, and factory-floor temperature ranges. According to the datasheet, the SAR core's zero-latency conversion enables deterministic response to fast-changing pressure, flow, or temperature signals.
Recommended
Automotive Sensor Acquisition
The H-grade screening (-40 °C to +125 °C) makes the LTC2313HTS8-14 suitable for under-hood and chassis sensor acquisition including pedal position, throttle body, oil-pressure, and exhaust gas temperature monitoring. Its TSOT-23-8 footprint saves critical PCB area in ECUs, and the integrated 2.5 V reference with 20 ppm/°C drift preserves calibration over automotive thermal cycles. According to the datasheet, the SAR core's deterministic sampling avoids the pipeline-delay hazards of higher-rate ADCs in control-loop feedback paths.
Recommended
Medical Monitoring & Diagnostics
Patient-monitoring equipment benefits from the LTC2313HTS8-14's 14-bit resolution for ECG, SpO2, temperature, and respiration channels where small signal amplitudes must be captured without loss of codes. The 5 mA supply current aligns with battery-powered and USB-powered portable instrument budgets, and the SPI-compatible serial interface simplifies connection to low-power MCUs. According to the datasheet, the integrated reference buffer reduces analog-side component count - critical for medical-device miniaturization and reliability.
Recommended
Multi-Channel Data Acquisition Systems
For modular DAQ cards, the LTC2313HTS8-14's 2.5 Msps throughput and zero pipeline latency enable sequential multi-channel scans where each conversion result must immediately feed DSP or FPGA logic without buffering. Its 8-pin TSOT-23-8 footprint supports high channel density on a single PCB stack-up, and the SPI-compatible interface allows multiple parts to share a bus by daisy-chaining the SDO pin. According to the datasheet, the SAR core achieves 14-bit no-missing-codes at the full 2.5 Msps rate, preserving accuracy in multiplexed sweeps.
Recommended
Battery-Powered Portable Instruments
Field-portable instruments such as handheld multimeters, gas analyzers, and environmental loggers benefit from the LTC2313HTS8-14's 5 mA supply current and single 3 V to 5 V supply operation, which extends runtime on Li-Ion or 4×AA battery packs. The TSOT-23-8 footprint fits inside compact handheld enclosures, and the wide -40 °C to +125 °C H-grade range covers outdoor and cold-storage deployments. According to the datasheet, the integrated reference and reference buffer eliminate the need for a separate reference circuit, reducing BOM cost in cost-sensitive portable designs.
Recommended
Loop-Powered 4-20 mA Sensor Transmitters
Loop-powered 4-20 mA transmitters have strict <3.6 mA total supply budgets, making the LTC2313HTS8-14's 5 mA supply current borderline but achievable when duty-cycled. The 14-bit resolution preserves the 4-20 mA's intrinsic ~14-bit signal range, and the integrated 2.5 V reference gives the DAC/ADC pair a stable absolute scale without external components. According to the datasheet, the SAR architecture's zero conversion latency enables fast update rates for critical control loops such as emergency shutoff valves.
Recommended
Recommended Products Summary
Engineering reference data for LTC2313HTS8-14 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LTC2313ITS8-14 | LTC2313CTS8-14 | LTC2312HTS8-14 | LTC2309IF | ADS7042IDBVR |
|---|---|---|---|---|---|---|
| Package | TSOT-23-8 (HTS8) | TSOT-23-8 - same | TSOT-23-8 - same | TSOT-23-8 - same | TSOT-23-8 - same | TSOT-23-8 (DBV) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Resolution | 14 bits | 14 bits | 14 bits | 12 bits | 12 bits | 12 bits |
| Sample Rate | 2.5 Msps | 2.5 Msps | 2.5 Msps | 2.5 Msps | 600 ksps | 1 Msps |
| Supply Voltage | 3 V to 5 V | 3 V to 5 V | 3 V to 5 V | 3 V to 5 V | 2.7 V to 5.5 V | 1.65 V to 3.6 V |
| Supply Current | 5 mA at 2.5 Msps | 5 mA | 5 mA | 4.5 mA | 1.4 mA at 600 ksps | 0.6 mA at 1 Msps |
| 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 +85 °C | -40 °C to +125 °C |
| Internal Reference | Yes (2.5 V, 20 ppm/°C) | Yes (2.5 V) | Yes (2.5 V) | Yes (2.5 V) | Yes (2.5 V) | External required |
| Serial Interface | SPI-compatible SCK/SDO/CSF | SPI-compatible | SPI-compatible | SPI-compatible | SPI-compatible | SPI-compatible |
Key Differentiators
- Industry's smallest 14-bit 2.5 Msps SAR ADC in TSOT-23-8 (vs ADS7042IDBVR (TI))
- Integrated 2.5 V reference and buffer (no external REF needed) (vs ADS7042IDBVR (TI))
- H-grade (-40 to +125 °C) built into the base part (vs LTC2309IF (AD I-grade))
- Zero conversion latency for real-time control loops (vs Pipeline ADCs (e.g. LTC2258IUJ-14))
Design Notes
Place 10 µF X7R (or X5R) ceramic bypass capacitors on VDD (pin 2) and REFCOMP (pin 1) as close to the package pads as possible, with a direct via to the GND plane. Place a 0.1 µF decoupling cap in parallel for high-frequency noise suppression. The IN+/IN- traces should be routed as a tightly-coupled differential pair over a continuous ground plane to reject common-mode noise from switching converters and digital signals.
Keep the SCK/SDO/CSF digital traces away from the analog IN+/IN- traces and the REFCOMP pin. Place a GND keep-out under the IN+ and IN- traces to minimize parasitic coupling to the digital return. According to the ADI datasheet, the SAR's sample-and-hold acquires the input on the SCK rising edge during conversion; clean clock edges prevent charge-injection glitches from distorting the conversion.
The TSOT-23-8 package's exposed lead-frame provides a thermal path to the PCB. Estimated: with the part dissipating ~16 mW (5 V × 5 mA × 0.64 typical) and a junction-to-ambient thermal resistance of ~150 °C/W on a 1-oz 4-layer PCB with modest copper pour, the junction temperature rise is roughly 2-3 °C above ambient - well below the +125 °C H-grade limit. No external heatsink is required for typical industrial use.
Do not skip the REFCOMP bypass capacitor - the integrated reference buffer is unbuffered without it, causing the internal reference to drift and reducing 14-bit no-missing-codes performance. Do not connect IN- to GND directly; tie IN- to mid-scale (VREF/2) to maximize signal swing and preserve the SAR's input common-mode range. Do not drive SCK faster than the datasheet's tSCK specification, as overshoot can cause conv start errors.
Compliance Information
RoHS compliant per ADI product page; Pb-free reflow profile per JEDEC J-STD-020 MSL1. H-grade temperature rating (-40 to +125 °C) supports automotive installations but is NOT AEC-Q100 qualified; this is an H-grade industrial part, not an automotive-qualified part.
