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Analog Devices Inc. LTC2327HMS-16#PBF
- Part No.:
- LTC2327HMS-16#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TFSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2327HMS-16#PBF.pdf
- Description:
- IC ADC 16BIT SAR 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,288
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Product details
Overview
LTC2327HMS-16#PBF from Analog Devices (formerly Linear Technology) is a 16-bit, 500ksps successive approximation register (SAR) analog-to-digital converter with pseudo-differential inputs and true bipolar ±10.24V input range. It operates from a single 5V supply, integrates a low-drift 2.048V internal reference and reference buffer, and delivers 93.5dB SNR and ±1.5LSB INL max - enabling high-precision data acquisition in industrial process control and high-speed instrumentation.
For engineers reviewing the LTC2327HMS-16#PBF datasheet, LTC2327HMS-16#PBF pinout, LTC2327HMS-16#PBF application, or LTC2327HMS-16#PBF equivalent, key selection considerations include guaranteed 16-bit no-missing-codes operation across –40°C to +125°C, SPI-compatible serial interface with daisy-chain mode, internal conversion clock, and nap/sleep power management for dynamic sampling-rate scaling.
Technical Context
The LTC2327HMS-16#PBF implements a charge-redistribution SAR architecture with a 16-bit CDAC and differential comparator, sampling the attenuated/level-shifted pseudo-differential input (IN+, IN–) during acquisition and performing binary-search conversion without pipeline delay. Its analog front-end includes 2kΩ input impedance resistor dividers and 45pF sampling capacitance, supporting ±10.24V full-scale range when REFBUF = 4.096V.
Conversion timing is governed by an internal oscillator (tCONV = 1.5µs typ), eliminating external clock dependencies; the BUSY signal asserts synchronously with CNV rising edge and deasserts upon result readiness. The SPI-compatible serial interface supports 1.8V–5V I/O logic levels, 100MHz SCK (10ns min period), and configurable RDL/SDI functionality depending on CHAIN pin state - enabling both standalone and daisy-chained multi-ADC configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution & Accuracy | 16-bit resolution with guaranteed no missing codes and ±1.5LSB INL max over –40°C to +125°C - ensures monotonicity and precision in closed-loop control feedback paths. |
| Sampling Rate | 500ksps maximum throughput with zero cycle latency - enables real-time capture of 200kHz bandwidth signals (Nyquist-limited) without buffering delays. |
| Dynamic Performance | 93.5dB SNR and –111dB THD at fIN = 2kHz (±10.24V range) - supports high-fidelity spectral analysis and low-distortion measurement in ATE and instrumentation. |
| Input Range | True bipolar ±10.24V pseudo-differential input range (configurable to ±6.25V or ±12.5V via reference options) - accommodates legacy industrial sensor outputs without external level-shifting. |
| Reference System | Integrated 2.048V bandgap reference (20ppm/°C max drift) with onboard 2× gain buffer (REFBUF = 4.096V) - eliminates need for external reference components in most applications. |
| Power Management | 36mW typical active power at 500ksps; 300μW sleep mode current - enables energy-efficient operation in portable or thermally constrained systems. |
| Temperature Range | Rated for –40°C to +125°C operation (H-grade) - qualified for under-hood automotive, downhole oil/gas, and industrial motor drive environments. |
Pinout & Package
Package: 16-lead plastic MSOP (3mm × 4.5mm, 0.5mm pitch), thermally enhanced with exposed pad (not electrically connected). Pin 1 marked with dot; top-side marking "232716".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDLBYP (1) | 2.5V LDO bypass | Internally regulated 2.5V supply for analog core; requires 2.2μF ceramic capacitor to GND for stability and noise reduction. |
| VDD (2) | 5V main supply | Primary analog/digital power rail (4.75–5.25V); bypass with 10μF ceramic capacitor to minimize switching noise coupling into ADC core. |
| GND (3,6,16) | Analog/digital ground | Three dedicated ground pins reduce ground bounce; must be tied to low-impedance PCB ground plane with short traces. |
| IN+ (4) | Pseudo-differential analog input (+) | Accepts true bipolar voltage up to ±10.24V relative to IN–; input impedance modeled as 2kΩ + 45pF - requires low-Z driver or buffer for settling. |
| IN– (5) | Pseudo-differential analog input (–) | Common-mode sense node with ±500mV range relative to GND; must connect to system ground or remote sense point to define common-mode reference. |
| REFBUF (7) | Reference buffer output | 4.096V buffered reference output (2× gain of REFIN); decoupled with 47μF ceramic capacitor - can be overdriven externally (2.5–5V) to scale input range. |
| REFIN (8) | Internal reference output / external reference input | 2.048V factory-trimmed bandgap reference; bypass with 100nF ceramic capacitor - accepts 1.25–2.4V external reference for improved accuracy or drift performance. |
| CNV (9) | Convert trigger input | Rising-edge–sensitive conversion start signal; logic levels referenced to OVDD - initiates acquisition phase and powers up internal circuitry. |
| CHAIN (10) | Daisy-chain mode selector | High = enable daisy-chain mode (RDL/SDI becomes SDI input); Low = normal mode (RDL/SDI controls SDO enable) - configures serial interface topology. |
| BUSY (11) | Conversion status indicator | Active-high open-drain output indicating conversion in progress; asserted synchronously with CNV↑ and cleared after tCONV completes. |
| RDL/SDI (12) | Serial bus control / daisy-chain data input | In normal mode: bus enable for SDO tri-state; in chain mode: serial data input from upstream ADC - eliminates need for separate chip-select lines in multi-ADC systems. |
| SCK (13) | Serial clock input | Master-controlled clock for SPI readout; supports 100MHz max frequency (10ns period); rising edge clocks out MSB-first 2's complement data on SDO. |
| SDO (14) | Serial data output | Tri-state CMOS output delivering 16-bit conversion result or daisy-chain data; driven only when RDL/SDI is low (normal mode) or CHAIN is high (chain mode). |
| OVDD (15) | I/O interface supply | Digital I/O voltage rail (1.71–5.25V); sets logic thresholds for CNV, CHAIN, BUSY, RDL/SDI, SCK, SDO - enables direct interfacing with 1.8V/2.5V/3.3V/5V controllers. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay, zero cycle latency | Enables deterministic real-time sampling for closed-loop control - conversion result available immediately after BUSY deasserts, with no FIFO or buffer-induced jitter. |
| Onboard single-shot capable reference buffer | Eliminates external op-amp buffer requirement while supporting external overdrive (1.25–2.4V at REFIN or 2.5–5V at REFBUF) for calibrated full-scale ranges. |
| Automatic nap mode between conversions | Reduces average power proportionally to sampling rate - e.g., 100ksps operation draws ~7.2mA instead of 11.4mA, extending battery life in portable DAQ systems. |
| SPI-compatible interface with daisy-chain mode | Allows up to 16 LTC2327HMS-16#PBF devices on a single 4-wire SPI bus (CNV, SCK, SDO, BUSY shared; RDL/SDI cascaded), minimizing MCU GPIO count and PCB routing complexity. |
| Guaranteed operation to +125°C | Validated performance across full H-grade temperature range - suitable for engine control units, power inverters, and industrial PLCs deployed in harsh thermal environments. |
Applications
| Programmable Logic Controllers | Industrial Process Control |
|---|---|
Use Scenario: High-accuracy analog input modules in modular PLC chassis acquiring 4–20mA current loop signals conditioned to ±10V via precision resistors. IC Role / Device Role / Timing Role: Primary SAR ADC digitizing sensor feedback (temperature, pressure, flow) with synchronized sampling across multiple channels using shared CNV. Use Value: ±1.5LSB INL and 93.5dB SNR ensure <0.005% measurement uncertainty over full industrial temperature range, meeting SIL-2 functional safety requirements for analog input integrity. | Use Scenario: Distributed I/O nodes in refinery DCS systems measuring thermocouple, RTD, and strain gauge outputs with cold-junction compensation and linearization. IC Role / Device Role / Timing Role: High-speed, low-latency ADC capturing transient events (valve actuation, pump startup) without missed samples due to zero-cycle latency. Use Value: 500ksps throughput and nap-mode power scaling allow burst-mode acquisition of fast transients while maintaining <10mW average power per channel in space-constrained field enclosures. |
| High Speed Data Acquisition | Portable or Compact Instrumentation |
Use Scenario: Benchtop oscilloscopes and spectrum analyzers requiring 16-bit resolution and >100kHz effective bandwidth for time-domain and FFT-based analysis. IC Role / Device Role / Timing Role: Front-end digitizer with internal reference and SPI interface feeding FPGA-based digital signal processing pipeline. Use Value: 7MHz –3dB input bandwidth and 4psRMS aperture jitter support accurate reconstruction of 200kHz sinusoids, while daisy-chain mode simplifies multi-channel board layout. | Use Scenario: Handheld multimeters and portable power quality analyzers needing high DC accuracy and AC performance in battery-powered form factors. IC Role / Device Role / Timing Role: Core ADC in ultra-low-power measurement subsystem, entering sleep mode (<300μW) between manual-triggered acquisitions. Use Value: Integrated 2.048V reference with 20ppm/°C drift and on-chip buffer eliminate external reference ICs and trimming, reducing BOM cost and calibration effort by 30%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed, high-accuracy SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8860IDRCT | 16-bit, 1MSPS, ±VREF unipolar input only; requires external reference and driver; no integrated reference buffer. | Unipolar-only input limits use with bipolar industrial sensors without external level-shifting circuitry. | Select when maximum speed (1MSPS) is critical and system already provides precision external reference and bipolar-to-unipolar conversion. |
| AD7616BSTZ | 16-bit, dual 1MSPS simultaneous-sampling ADC; integrated PGA and sequencer; 5V supply but no internal reference - requires external 2.5V reference. | Simultaneous sampling across 16 channels vs. single-channel LTC2327HMS-16#PBF; larger 64-lead LQFP package. | Select for multi-channel synchronized acquisition (e.g., motor phase current/voltage) where channel count outweighs per-channel cost and size constraints. |
Compared with ADS8860IDRCT and AD7616BSTZ, the LTC2327HMS-16#PBF uniquely combines true bipolar ±10.24V input, integrated low-drift reference buffer, and H-grade temperature rating in a compact MSOP package - making it optimal for space-constrained, high-reliability industrial analog input modules where bipolar signal fidelity and thermal robustness are non-negotiable.
Availability
LTC2327HMS-16#PBF is available at Aetrix Electronics and suitable for programmable logic controllers, industrial process control systems, and high-speed data acquisition equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC2327HMS-16#PBF 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 LTC2327HMS-16#PBF belongs to ADI's precision SAR ADC product line, designed specifically for high-dynamic-range, low-latency data acquisition in harsh industrial environments where accuracy, reliability, and extended temperature operation are critical.
FAQ
What is the operating temperature range specified for the LTC2327HMS-16#PBF?
The LTC2327HMS-16#PBF is rated for continuous operation from –40°C to +125°C (H-grade), with all electrical specifications guaranteed across this full range. This extends beyond standard industrial grade (–40°C to +85°C) and qualifies the device for under-hood automotive, downhole, and high-temperature industrial control applications where thermal resilience is essential. The datasheet confirms guaranteed INL, SNR, and timing parameters at +125°C ambient.
Does the LTC2327HMS-16#PBF require an external reference, or does it include one internally?
The LTC2327HMS-16#PBF includes a fully integrated 2.048V low-drift (20ppm/°C max) bandgap reference and a 2× gain reference buffer that outputs 4.096V at the REFBUF pin - enabling immediate use with ±10.24V input range. External references may optionally overdrive REFIN (1.25–2.4V) or REFBUF (2.5–5V) for enhanced accuracy or custom full-scale ranges, but are not required for basic operation of the LTC2327HMS-16#PBF.
How does the nap mode and sleep mode function in the LTC2327HMS-16#PBF?
The LTC2327HMS-16#PBF automatically enters nap mode between conversions, reducing supply current from 11.4mA (active) to 7.2mA (nap) at 500ksps - scaling dynamically with sample rate. Sleep mode is entered via hardware control (CNV inactive for >100ms) and draws only 300μW, ideal for battery-powered instruments between manual measurements. Both modes preserve reference stability and eliminate wake-up delay, ensuring the LTC2327HMS-16#PBF is ready for immediate conversion upon CNV assertion.
Can the LTC2327HMS-16#PBF interface directly with a 1.8V microcontroller SPI port?
Yes, the LTC2327HMS-16#PBF supports 1.8V–5V logic levels on all digital I/O pins (CNV, CHAIN, BUSY, RDL/SDI, SCK, SDO) via the OVDD supply pin. When OVDD = 1.8V, VIH = 1.44V min and VIL = 0.36V max, ensuring reliable communication with 1.8V MCUs without level shifters. The SDO output drives to OVDD – 0.2V high and 0.2V low, meeting standard SPI voltage thresholds for the LTC2327HMS-16#PBF.
What is the significance of the "HMS" suffix in LTC2327HMS-16#PBF?
The "HMS" in LTC2327HMS-16#PBF denotes the H-grade temperature rating (–40°C to +125°C) in a 16-lead MSOP package. The "H" specifies the extended temperature range, "M" indicates MSOP packaging, and "S" signifies tape-and-reel shipping format. This distinguishes it from the C-grade (0°C to +70°C) and I-grade (–40°C to +85°C) variants - confirming the LTC2327HMS-16#PBF is qualified for the most demanding thermal environments.
LTC2327HMS-16#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TFSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 500k
- Number of Inputs:
- 1
- Input Type:
- Pseudo-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, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 16-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2327HMS-16#PBF FAQ
1.How can I place an order for LTC2327HMS-16#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2327HMS-16#PBF 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 LTC2327HMS-16#PBF reliable?
The price and inventory of LTC2327HMS-16#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2327HMS-16#PBF is usually 5 days.
3.What payment methods are accepted for LTC2327HMS-16#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2327HMS-16#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2327HMS-16#PBF?
LTC2327HMS-16#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2327HMS-16#PBF 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 LTC2327HMS-16#PBF?
For technical support, including LTC2327HMS-16#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2327HMS-16#PBF requirements.
6.How does Aetrix verify that LTC2327HMS-16#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2327HMS-16#PBF 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 LTC2327HMS-16#PBF meets industry standards.
7.What is the process for return or replacement of LTC2327HMS-16#PBF?
All LTC2327HMS-16#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2327HMS-16#PBF, 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 LTC2327HMS-16#PBF part is unused and in its original packaging.
Return procedure for LTC2327HMS-16#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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