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Analog Devices Inc. LTC2381HMS-16#TRPBF
- Part No.:
- LTC2381HMS-16#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TFSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2381HMS-16#TRPBF.pdf
- Description:
- IC ADC 16BIT SAR 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,369
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Product details
Overview
LTC2381HMS-16#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit, 250ksps successive approximation register (SAR) analog-to-digital converter with fully differential ±2.5V input range, 92dB SNR at 20kHz, ±2LSB INL max, and no missing codes. It operates from a single 2.5V supply, consumes only 3.25mW at full speed, and features extended 3.25µs acquisition time-enabling ultra-low-power ADC driver usage in high-precision data acquisition systems.
For engineers reviewing the LTC2381HMS-16#TRPBF datasheet, LTC2381HMS-16#TRPBF pinout, LTC2381HMS-16#TRPBF application, or LTC2381HMS-16#TRPBF equivalent, key selection considerations include guaranteed operation to +125°C, SPI-compatible serial interface with daisy-chain mode, internal conversion clock, no pipeline delay, and 1.8V–5V I/O voltage support for mixed-supply system integration.
Technical Context
The LTC2381HMS-16#TRPBF employs a proprietary sampling architecture that initiates acquisition of the next sample during the current conversion cycle, enabling its 3.25µs extended acquisition window. Its internal oscillator eliminates external clock dependency, and auto power-down between conversions scales quiescent current from 1.7mA at 250ksps to 0.5µA in shutdown.
This SAR ADC uses a 16-bit CDAC with differential comparator and 2's complement serial output. It supports true bipolar input handling via fully differential inputs referenced to an external 2.5V reference, with guaranteed performance across –40°C to +125°C ambient temperature per H-grade specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 discrete output levels for high dynamic range measurement fidelity |
| Sampling Rate | 250ksps - enables real-time capture of signals up to ~125kHz Nyquist bandwidth |
| SNR | 92dB (typ) at fIN = 20kHz - ensures >15-bit effective resolution in mid-band applications |
| INL | ±2LSB (max) - guarantees monotonicity and linearity critical for closed-loop control and calibration |
| Power Dissipation | 3.25mW at 250ksps - allows battery-powered or thermally constrained instrumentation without active cooling |
| Input Range | ±2.5V fully differential - supports wide-swing industrial sensor outputs and bipolar transducer interfaces |
| Temperature Range | –40°C to +125°C - qualified for under-hood automotive, downhole oil & gas, and industrial motor drive environments |
Pinout & Package
Package: 16-lead plastic MSOP (4mm × 5mm), exposed pad not present in MSOP variant; RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CHAIN (1) | Mode selector | High enables daisy-chain serial input (SDI); low enables RDL bus-enable function for SDO tri-state control |
| VDD (2) | Digital core supply | 2.5V ±62.5mV supply for logic and SAR core; requires 10µF ceramic bypass to GND |
| GND (3,6,10,16) | Analog/digital ground | Four dedicated ground pins minimize ground bounce and improve PSRR in high-speed conversion |
| IN+, IN– (4,5) | Differential analog inputs | Accept ±2.5V differential signal; 45pF input capacitance in sample mode; CMRR ≥70dB |
| REF (7,8) | Reference input | 2.4V–2.6V external reference; draws up to 285µA at 250ksps; requires 47µF X5R ceramic decoupling |
| CNV (9) | Convert trigger | Rising edge initiates conversion; high state after conversion enables automatic power-down |
| BUSY (11) | Conversion status | Active-high open-drain indicator; asserts at conversion start, deasserts on completion |
| RDL/SDI (12) | Serial interface control/data | Function depends on CHAIN state: bus enable (low) or serial data input (high) |
| SCK (13) | Serial clock input | Supports up to 100MHz SCK (10ns period); timing-critical for data capture synchronization |
| SDO (14) | Serial data output | 2's complement 16-bit MSB-first output; tri-stated when RDL = low in normal mode |
| OVDD (15) | I/O interface supply | 1.71V–5.25V logic-level supply; sets VIH/VIL thresholds and drives SDO/SCK/RDL/SDI buffers |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay / zero cycle latency | Enables deterministic real-time control loop timing without output data buffering or phase offset compensation |
| Extended 3.25µs acquisition time | Reduces required drive strength by >5× versus standard SAR ADCs, permitting use of sub-10mW op-amps like LT6350-H |
| Internal conversion clock | Eliminates need for external master clock source or PLL, simplifying PCB layout and reducing BOM count |
| 1.8V–5V I/O voltage compatibility | Allows direct interfacing with FPGA, MCU, or DSP operating at 1.8V, 2.5V, 3.3V, or 5V logic without level shifters |
| Guaranteed operation to +125°C | Validated performance over full H-grade temperature range supports deployment in harsh thermal environments |
Applications
| Medical Imaging Signal Chain | Industrial Process Control Loop |
|---|---|
Use Scenario: Digitizing low-noise, high-fidelity analog outputs from ultrasound beamformer channels or MRI gradient amplifiers. IC Role / Device Role / Timing Role: High-resolution, low-latency ADC capturing transient waveforms with minimal harmonic distortion and aperture jitter. Use Value: 92dB SNR and –106dB THD preserve diagnostic image contrast and spatial resolution; no missing codes prevent data corruption in safety-critical imaging paths. |
Use Scenario: Sampling feedback signals from servo motor current sensors, pressure transducers, and temperature RTDs in PLC-based control cabinets. IC Role / Device Role / Timing Role: Precision analog front-end digitizer interfacing directly with isolated analog sensor outputs in noisy factory environments. Use Value: ±2.5V differential input rejects common-mode noise; 70dB CMRR and 125°C rating ensure stable operation near high-power drives and transformers. |
| Portable Test & Measurement Equipment | Automotive Onboard Diagnostics (OBD) |
Use Scenario: Battery-powered handheld oscilloscopes, spectrum analyzers, and multimeters requiring high accuracy and low standby power. IC Role / Device Role / Timing Role: Core data acquisition engine delivering 16-bit resolution with 3.25mW active power and sub-µA shutdown current. Use Value: Extended acquisition time reduces ADC driver power by >80%, extending battery life while maintaining 92dB SNR performance. |
Use Scenario: Real-time monitoring of engine knock sensors, exhaust gas oxygen (EGO) signals, and battery cell voltages in engine control units (ECUs). IC Role / Device Role / Timing Role: Automotive-grade ADC performing synchronized multi-channel sampling under extreme thermal cycling conditions. Use Value: H-grade qualification (–40°C to +125°C), robust ESD-protected inputs, and guaranteed 16-bit no-missing-codes behavior meet AEC-Q100 reliability requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7960BCPZ-RL7 | 18-bit, 5MSPS, 2.5V supply, ±5V input range; requires external reference and separate VIO supply; higher power (39mW) | Targets ultra-high-resolution applications (e.g., precision metrology) where speed outweighs power constraints | Select when >16-bit resolution and >1MSPS throughput are mandatory; avoid if thermal budget or cost sensitivity applies |
| ADS8860IPWR | 16-bit, 1MSPS, 3V supply, pseudo-differential input; no daisy-chain mode; lower SNR (90.5dB); 125°C operation not guaranteed | Suitable for compact, high-throughput data loggers where single-ended sensor interfaces dominate | Choose for cost-sensitive, space-constrained designs needing faster sampling but tolerating reduced noise floor and narrower temp range |
Compared with AD7960BCPZ-RL7 and ADS8860IPWR, the LTC2381HMS-16#TRPBF uniquely balances 250ksps speed, 92dB SNR, 3.25mW power, and guaranteed +125°C operation in a single 2.5V-supply, daisy-chain-capable package-making it optimal for thermally demanding, battery-aware, and noise-sensitive embedded acquisition systems.
Availability
LTC2381HMS-16#TRPBF is available at Aetrix Electronics and suitable for medical imaging signal chains, industrial process control loops, and portable test equipment requiring stable component supply with long-term manufacturability and consistent parametric performance.
Supply support for LTC2381HMS-16#TRPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC2381HMS-16#TRPBF belongs to ADI's legacy Linear Technology precision data acquisition portfolio, engineered specifically for high-speed, low-power, wide-temperature-range applications where accuracy, reliability, and ease of system integration are critical.
FAQ
What is the maximum operating temperature for the LTC2381HMS-16#TRPBF?
The LTC2381HMS-16#TRPBF is rated for continuous operation from –40°C to +125°C ambient temperature, meeting the H-grade specification. This is confirmed in the Absolute Maximum Ratings table and validated across all electrical parameters in the "ELECTRICAL CHARACTERISTICS" section of the datasheet, including INL, SNR, and power consumption.
Does the LTC2381HMS-16#TRPBF require an external reference, and what are the specifications?
Yes, the LTC2381HMS-16#TRPBF requires an external 2.4V–2.6V reference applied to the REF pins (7 and 8). The reference must supply up to 285µA DC load current at 250ksps and be decoupled with a 47µF X5R ceramic capacitor. Recommended references include the LTC6652-2.5 (0.05% initial accuracy, 5ppm/°C drift), which was used for all published performance curves.
How does the daisy-chain mode work on the LTC2381HMS-16#TRPBF?
Daisy-chain mode is enabled by driving the CHAIN pin (1) high. In this mode, the RDL/SDI pin (12) functions as SDI, accepting serial data from the previous device in the chain, while SDO (14) outputs converted data to the next device. The SCK (13) synchronizes all devices, and BUSY (11) remains local to each part. This allows multiple LTC2381HMS-16#TRPBF units to share one SPI bus with minimal GPIO overhead.
What is the significance of the 3.25µs extended acquisition time in the LTC2381HMS-16#TRPBF?
The 3.25µs extended acquisition time allows the LTC2381HMS-16#TRPBF to settle input signals using significantly lower-bandwidth, lower-power drivers-such as the LT6350-H-without sacrificing SNR or THD. This reduces total system power, eases PCB layout, and improves thermal performance compared to SAR ADCs with shorter acquisition windows requiring high-output-current op-amps.
Is the LTC2381HMS-16#TRPBF pin-compatible with other members of the LTC2381 family?
Yes, the LTC2381HMS-16#TRPBF shares identical pinout and footprint with all MSOP-packaged variants (e.g., LTC2381CMS-16#TRPBF, LTC2381IMS-16#TRPBF), differing only in temperature grade and part marking. All MSOP versions use the same 16-pin configuration, electrical interface, and timing behavior-enabling drop-in replacement across C/I/H grades without PCB redesign.
LTC2381HMS-16#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TFSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 250k
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.375V ~ 2.625V
- Voltage - Supply, Digital:
- 2.375V ~ 2.625V
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 16-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2381HMS-16#TRPBF FAQ
1.How can I place an order for LTC2381HMS-16#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2381HMS-16#TRPBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LTC2381HMS-16#TRPBF reliable?
The price and inventory of LTC2381HMS-16#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2381HMS-16#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2381HMS-16#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2381HMS-16#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2381HMS-16#TRPBF?
LTC2381HMS-16#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2381HMS-16#TRPBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LTC2381HMS-16#TRPBF?
For technical support, including LTC2381HMS-16#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2381HMS-16#TRPBF requirements.
6.How does Aetrix verify that LTC2381HMS-16#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2381HMS-16#TRPBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LTC2381HMS-16#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2381HMS-16#TRPBF?
All LTC2381HMS-16#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2381HMS-16#TRPBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LTC2381HMS-16#TRPBF part is unused and in its original packaging.
Return procedure for LTC2381HMS-16#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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