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Analog Devices Inc. LTC2327HMS-18#PBF
- Part No.:
- LTC2327HMS-18#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TFSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2327HMS-18#PBF.pdf
- Description:
- IC ADC 18BIT SAR 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,229
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Product details
Overview
LTC2327HMS-18#PBF from Analog Devices (formerly Linear Technology) is an 18-bit, 500ksps successive approximation register (SAR) analog-to-digital converter with pseudo-differential inputs and true bipolar ±10.24V input range. It features 95dB SNR, ±5LSB INL max, no missing codes at 18 bits, and operates from a single 5V supply. It is used in high-speed industrial data acquisition systems requiring wide dynamic range and precision at extended temperature.
For engineers reviewing the LTC2327HMS-18#PBF datasheet, LTC2327HMS-18#PBF pinout, LTC2327HMS-18#PBF application, or LTC2327HMS-18#PBF equivalent, key selection criteria include guaranteed operation to 125°C, internal 2.048V reference with 20ppm/°C drift, SPI-compatible daisy-chain interface, and nap/sleep power management for embedded instrumentation.
Technical Context
The LTC2327HMS-18#PBF implements a charge redistribution capacitor DAC architecture with internal oscillator timing, eliminating external clock dependencies. Its pseudo-differential input stage uses resistor divider networks and clamping diodes to support ±10.24V true bipolar operation while rejecting common-mode noise up to 66dB at 250kHz.
Conversion is initiated by a rising edge on CNV, with zero cycle latency and no pipeline delay. The 18-bit 2's complement output is serialized via SPI-compatible interface supporting 1.8V–5V I/O levels, daisy-chain mode, and BUSY-synchronized readout - all while maintaining full 500ksps throughput and guaranteed 18-bit monotonicity across –40°C to 125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 18-bit - delivers 262,144 distinct output codes with guaranteed no missing codes over full temperature range. |
| Sampling Rate | 500ksps - enables real-time capture of signals up to 250kHz Nyquist bandwidth without undersampling. |
| Input Range | ±10.24V true bipolar - supports direct interfacing with industrial ±10V sensor outputs without external level-shifting. |
| SNR | 95dB (typ) at fIN = 2kHz - ensures >15.8 effective number of bits (ENOB) for high-fidelity signal digitization. |
| INL | ±5LSB (max) - limits integral nonlinearity error to <0.0076% of full scale, critical for calibration-critical applications. |
| Reference | Internal 2.048V bandgap + 2× buffer (4.096V) - provides stable, low-drift reference with 20ppm/°C max TC over –40°C to 125°C. |
| Power Dissipation | 36mW (typ) at 500ksps - scales with sample rate; drops to 300μW in sleep mode for battery-sensitive portable instrumentation. |
Pinout & Package
Package: 16-lead plastic MSOP (3mm × 4.9mm), RoHS-compliant, with exposed pad for thermal performance. Rated for operation from –40°C to 125°C (H-grade).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 2) | Analog power supply | 5V ±2.5% supply; bypassed with 10µF ceramic capacitor to GND for low-noise ADC core operation. |
| IN+ / IN– (Pins 4, 5) | Pseudo-differential analog inputs | Support ±10.24V true bipolar swing; IN– serves as ground sense point with ±500mV range, enabling remote sensing and CMRR optimization. |
| REFBUF (Pin 7) | Reference buffer output | Nominally 4.096V (2× REFIN); decoupled with 47µF ceramic capacitor; can be overdriven externally (2.5V–5V) to scale input range. |
| REFIN (Pin 8) | Internal reference output / external reference input | 2.048V ±5mV bandgap output; bypassed with 100nF ceramic capacitor; accepts 1.25V–2.4V external reference for enhanced accuracy. |
| CNV (Pin 9) | Convert trigger input | Rising-edge–sensitive control signal; initiates acquisition and conversion sequence with no setup/hold timing constraints. |
| CHAIN / RDL/SDI / SCK / SDO / BUSY (Pins 10–14) | SPI-compatible serial interface | Supports daisy-chain configuration (CHAIN high), 100MHz SCK, 2's complement output, and BUSY-synchronized readout for deterministic timing. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay, zero cycle latency | Enables immediate post-conversion readout and deterministic real-time control loop response without FIFO buffering. |
| Onboard single-shot capable reference buffer | Eliminates need for external op-amp buffer; supports both internal reference use and external overdrive modes with seamless range scaling. |
| Automatic nap mode between conversions | Reduces average power proportionally to sampling rate - e.g., ~18mW at 250ksps - optimizing thermal budget in dense PCB layouts. |
| True bipolar ±10.24V input with 7MHz linear bandwidth | Directly interfaces with legacy industrial ±10V sensors and PLC analog I/O modules without signal conditioning circuitry. |
| Guaranteed operation to 125°C | Validated performance across full H-grade temperature range - suitable for under-hood automotive, downhole oil/gas, and industrial furnace monitoring. |
Applications
| Programmable Logic Controllers | Industrial Process Control |
|---|---|
Use Scenario: High-accuracy analog input module in modular PLC chassis acquiring voltage signals from pressure, flow, and temperature transmitters. IC Role / Device Role / Timing Role: Primary SAR ADC digitizing ±10V field signals with synchronized sampling and deterministic SPI readout for cyclic I/O update. Use Value: Eliminates external signal conditioning and reference buffers, reducing BOM count and improving long-term gain/offset stability over temperature. |
Use Scenario: Distributed control system (DCS) analog input card measuring reactor vessel level, pH, and dissolved oxygen with 18-bit resolution. IC Role / Device Role / Timing Role: Precision ADC providing calibrated 18-bit data to FPGA-based control engine with BUSY-driven read synchronization. Use Value: ±5LSB INL and 95dB SNR ensure measurement repeatability within ±0.002% FS across 20-year plant lifecycle, meeting ISA-84 SIL-2 requirements. |
| High-Speed Data Acquisition | Portable or Compact Instrumentation |
Use Scenario: 16-channel, 500ksps per channel DAQ system for vibration analysis and partial discharge detection in rotating machinery. IC Role / Device Role / Timing Role: Channel ADC in daisy-chained configuration, sharing single SCK/BUSY lines to minimize FPGA pin count and routing complexity. Use Value: Daisy-chain mode reduces interconnect count by 75% vs parallel interface; 500ksps throughput enables 32k-point FFT at 2kHz input without aliasing. |
Use Scenario: Battery-powered handheld oscilloscope or power quality analyzer requiring high dynamic range in compact form factor. IC Role / Device Role / Timing Role: Core ADC operating in nap/sleep modes to extend battery life while delivering 18-bit resolution at user-selectable sample rates. Use Value: 300μW sleep current and automatic nap mode reduce average power to <15mW at 100ksps - enabling >8-hour runtime on 2000mAh Li-ion cell. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed, high-resolution SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7606C-18 | 18-bit, 1MSPS, ±10V input, integrated analog front-end (AFE) with PGA and anti-alias filter; requires dual ±15V supplies for full range. | Better suited for multi-channel simultaneous sampling systems with built-in oversampling and digital filtering; higher power (120mW). | Select when simultaneous sampling across ≥2 channels and on-chip filtering are required; avoid if single-supply 5V operation is mandatory. |
| ADS8860 | 16-bit, 1MSPS, ±5V input, no internal reference, external VREF required; lower SNR (91dB), smaller 3mm × 3mm QFN package. | Targeted at space-constrained, cost-sensitive designs where 16-bit resolution suffices and external reference design is acceptable. | Select for compact, high-speed applications with relaxed linearity (±1.5LSB INL) and no requirement for true ±10.24V input range. |
Compared with AD7606C-18 and ADS8860, the LTC2327HMS-18#PBF uniquely combines single 5V supply operation, ±10.24V true bipolar input, internal reference + buffer, and guaranteed 125°C operation - making it optimal for ruggedized industrial DAQ where supply simplicity and temperature robustness are prioritized over simultaneous sampling or ultra-high speed.
Availability
LTC2327HMS-18#PBF is available at Aetrix Electronics and suitable for programmable logic controllers, industrial process control systems, and high-speed data acquisition requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC2327HMS-18#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 semiconductors, formed through the acquisition of Linear Technology in 2017.
The LTC2327HMS-18#PBF belongs to ADI's precision SAR ADC product line, engineered for industrial, test & measurement, and energy infrastructure applications demanding wide input range, low noise, and extended temperature reliability.
FAQ
What is the maximum operating temperature for the LTC2327HMS-18#PBF?
The LTC2327HMS-18#PBF is rated for continuous operation from –40°C to +125°C (H-grade), with full electrical specifications guaranteed across this range. Absolute maximum junction temperature is 150°C, and thermal resistance θJA is 110°C/W in the 16-lead MSOP package. This makes LTC2327HMS-18#PBF suitable for under-hood automotive, downhole, and furnace-mounted instrumentation where ambient temperatures exceed 105°C.
Does the LTC2327HMS-18#PBF require an external reference?
No, the LTC2327HMS-18#PBF includes a factory-trimmed 2.048V internal bandgap reference and a 2× gain reference buffer delivering 4.096V at REFBUF. This enables full ±10.24V input range operation with no external components. However, REFIN accepts 1.25V–2.4V external references for improved accuracy, and REFBUF can be overdriven (2.5V–5V) to scale input range to ±6.25V or ±12.5V - all supported in the same LTC2327HMS-18#PBF device.
How does the nap mode function in the LTC2327HMS-18#PBF?
The LTC2327HMS-18#PBF automatically enters nap mode between conversions when not actively sampling, reducing supply current from 18.6mA (typ) to ~0.1mA. Power dissipation scales linearly with sampling rate - e.g., ~18mW at 250ksps and 36mW at 500ksps. A dedicated sleep mode further reduces current to 300μW for extended idle periods, controlled via CNV timing. This behavior is inherent to LTC2327HMS-18#PBF and requires no software configuration.
Can the LTC2327HMS-18#PBF interface directly with a 1.8V microcontroller?
Yes, the LTC2327HMS-18#PBF supports 1.8V, 2.5V, 3.3V, and 5V logic levels on its digital interface (OVDD pin). When OVDD = 1.8V, all digital inputs (CNV, CHAIN, RDL/SDI, SCK) recognize 0.36V/1.44V thresholds, and outputs (SDO, BUSY) drive to 1.6V/0.2V levels - fully compatible with 1.8V MCU GPIOs. No level-shifting circuitry is needed, simplifying host interface design for the LTC2327HMS-18#PBF.
What is the significance of "pseudo-differential" input in the LTC2327HMS-18#PBF?
The LTC2327HMS-18#PBF uses pseudo-differential inputs: IN+ carries the signal, while IN– serves as a dedicated ground-sense node (±500mV range), not a true complementary signal. This architecture rejects common-mode noise on the signal path and enables remote ground sensing to eliminate ground loop errors. It differs from fully differential inputs but provides superior noise immunity over single-ended topologies - a key design feature of the LTC2327HMS-18#PBF for industrial environments.
LTC2327HMS-18#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:
- 18
- 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-18#PBF FAQ
1.How can I place an order for LTC2327HMS-18#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2327HMS-18#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-18#PBF reliable?
The price and inventory of LTC2327HMS-18#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-18#PBF is usually 5 days.
3.What payment methods are accepted for LTC2327HMS-18#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2327HMS-18#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2327HMS-18#PBF?
LTC2327HMS-18#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2327HMS-18#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-18#PBF?
For technical support, including LTC2327HMS-18#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2327HMS-18#PBF requirements.
6.How does Aetrix verify that LTC2327HMS-18#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2327HMS-18#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-18#PBF meets industry standards.
7.What is the process for return or replacement of LTC2327HMS-18#PBF?
All LTC2327HMS-18#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2327HMS-18#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-18#PBF part is unused and in its original packaging.
Return procedure for LTC2327HMS-18#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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