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Analog Devices Inc. LTC2328HMS-18#PBF
- Part No.:
- LTC2328HMS-18#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TFSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2328HMS-18#PBF.pdf
- Description:
- IC ADC 18BIT SAR 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,341
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Product details
Overview
LTC2328HMS-18#PBF from Analog Devices (formerly Linear Technology) is an 18-bit, 1 Msps successive approximation register (SAR) analog-to-digital converter with pseudo-differential inputs, ±10.24 V true bipolar input range, and 95 dB SNR at 2 kHz. It operates from a single 5 V supply, integrates a 2.048 V low-drift (20 ppm/°C max) internal reference and reference buffer, and delivers guaranteed no-missing-codes performance across its full temperature range of –40°C to +125°C - ideal for high-voltage industrial data acquisition systems requiring precision and thermal robustness.
For engineers reviewing the LTC2328HMS-18#PBF datasheet, LTC2328HMS-18#PBF pinout, LTC2328HMS-18#PBF application, or LTC2328HMS-18#PBF equivalent, key selection considerations include its 16-lead MSOP package, SPI-compatible serial interface with daisy-chain mode, ±5 LSB INL (max), 1.8 V–5 V I/O voltage support, and automatic nap/sleep power management enabling 50 mW typical and 300 µW sleep-mode dissipation.
Technical Context
The LTC2328HMS-18#PBF implements a charge-redistribution SAR architecture with internal oscillator timing, eliminating external clock dependencies. Its pseudo-differential front-end uses resistor-divider networks and clamped inputs (±16.5 V absolute rating) to achieve 7 MHz –3 dB input linear bandwidth and 4 ps RMS aperture jitter.
Conversion is initiated by a rising edge on CNV; BUSY asserts during conversion (tCONV = 460–527 ns), with zero cycle latency and no pipeline delay. The 2's complement output is serialized via SDO on SCK rising edges, supporting daisy-chain mode when CHAIN is high and configurable 1.8 V–5 V OVDD logic levels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 18-bit - delivers 262,144 distinct codes with guaranteed no missing codes over full operating temperature range. |
| Sampling Rate | 1 Msps - enables real-time capture of signals up to 500 kHz Nyquist bandwidth without undersampling. |
| INL (Max) | ±5 LSB - ensures monotonicity and ≤0.002% full-scale linearity error in high-precision closed-loop control. |
| SNR (Typ) | 95 dB at fIN = 2 kHz - supports >15.8 effective number of bits (ENOB) for dynamic signal fidelity. |
| Input Range | ±10.24 V true bipolar - matches standard industrial sensor outputs and eliminates external level-shifting circuitry. |
| Reference | Integrated 2.048 V bandgap (20 ppm/°C max drift) with buffered 4.096 V output - reduces BOM count and improves thermal stability vs. external references. |
| Power Dissipation | 50 mW at 1 Msps, 300 µW in sleep mode - scales with sampling rate and enables low-power operation in intermittent acquisition systems. |
Pinout & Package
Package: 16-lead plastic MSOP (3 mm × 4.9 mm, 0.65 mm pitch), rated for operation from –40°C to +125°C (H-grade).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 2) | Analog power supply | 5 V ±2.5% input; powers ADC core and internal reference; requires 10 µF ceramic bypass to GND. |
| IN+ / IN– (Pins 4, 5) | Pseudo-differential analog inputs | Accept ±10.24 V differential swing; IN– serves as ground sense point with ±500 mV common-mode range. |
| REFBUF (Pin 7) | Buffered reference output | Nominally 4.096 V; decoupled with 47 µF ceramic capacitor; can be overdriven externally (2.5 V–5 V) to scale input range. |
| REFIN (Pin 8) | Internal reference output / external reference input | 2.048 V ±5 mV bandgap output; bypassed with 100 nF capacitor; accepts 1.25 V–2.4 V external overdrive for enhanced accuracy. |
| CNV (Pin 9) | Convert trigger input | Rising-edge–sensitive; initiates acquisition and conversion; logic levels referenced to OVDD. |
| CHAIN (Pin 10) | Daisy-chain mode selector | High = enable daisy-chain; low = normal RDL/SDI bus-enable mode - configures serial interface topology. |
| BUSY (Pin 11) | Conversion status indicator | Active-high open-drain output; asserts at CNV↑, deasserts upon result availability - used for timing synchronization. |
| RDL/SDI (Pin 12) | Serial interface control/data input | Function depends on CHAIN state: bus-enable (low CHAIN) or SDI (high CHAIN); supports SPI-compatible protocol. |
| SCK / SDO (Pins 13, 14) | Serial clock / data output | SCK clocks 18-bit 2's complement result out MSB-first on SDO; supports up to 100 MHz SCK (10 ns period). |
| OVDD (Pin 15) | Digital I/O supply | 1.71 V–5.25 V logic supply; sets VIH/VIL thresholds; bypassed with 0.1 µF capacitor - enables mixed-voltage system interfacing. |
Key Features
| Feature | Design Value |
|---|---|
| True bipolar ±10.24 V input range | Eliminates external op-amp level-shifting for industrial ±10 V sensors and PLC analog I/O modules. |
| No pipeline delay / zero cycle latency | Enables deterministic real-time control loop closure with sub-microsecond timing predictability. |
| Onboard single-shot capable reference buffer | Reduces external component count and PCB area while maintaining 4.096 V stability under dynamic load conditions. |
| 1.8 V–5 V I/O voltage compatibility | Direct interface to FPGAs, microcontrollers, and DSPs operating at 1.8 V, 2.5 V, 3.3 V, or 5 V logic levels - no level shifters required. |
| Automatic nap mode between conversions | Reduces average power proportionally to sampling rate - critical for battery-powered or thermally constrained instrumentation. |
| Guaranteed operation to +125°C | Validated performance across full H-grade temperature range - suitable for under-hood automotive, downhole, and industrial motor drive applications. |
Applications
| Programmable Logic Controllers | Industrial Process Control |
|---|---|
Use Scenario: High-accuracy analog input module acquiring ±10 V sensor signals (e.g., pressure transducers, RTD conditioners) in modular PLC backplanes. IC Role / Device Role / Timing Role: Primary SAR ADC digitizing conditioned field signals with deterministic 1 µs conversion interval and zero latency for fast control response. Use Value: ±5 LSB INL and 95 dB SNR ensure <0.01% measurement uncertainty over full temperature range, meeting IEC 61000-6-2 immunity requirements. |
Use Scenario: Distributed I/O node in refinery DCS collecting multi-channel 4–20 mA current loop signals via precision shunt resistors. IC Role / Device Role / Timing Role: High-speed, isolated analog front-end ADC with integrated reference - simplifies calibration and improves channel-to-channel matching. Use Value: Internal 2.048 V reference (20 ppm/°C max) and ±10.24 V input range eliminate external reference drift errors and reduce calibration frequency. |
| High Speed Data Acquisition | ATE |
Use Scenario: Compact benchtop DAQ system capturing transient waveforms (e.g., motor startup, power quality events) at 1 Msps with 18-bit resolution. IC Role / Device Role / Timing Role: Core sampling engine with SPI daisy-chain capability for multi-channel synchronized acquisition using single FPGA controller. Use Value: Daisy-chain mode and 100 MHz SCK support enable 16-channel 1 Msps acquisition with minimal FPGA pin count and deterministic inter-channel skew. |
Use Scenario: Automated test equipment digitizing high-fidelity stimulus responses (e.g., RF power amplifier characterization, sensor linearity testing). IC Role / Device Role / Timing Role: Precision ADC in calibrated test head; leverages internal reference and guaranteed specs to minimize system-level calibration overhead. Use Value: Guaranteed 18-bit no-missing-codes and ±5 LSB INL allow direct use in metrology-grade ATE without per-unit trimming or binning. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed precision SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7606C-18 | 8-channel simultaneous-sampling, ±10 V input, 1 MSPS per channel, internal reference (2.5 V), 2.5 V–5.5 V OVDD, 64-lead LQFP | Multi-channel parallel acquisition vs. single-channel high-density layout; higher channel count but larger footprint and fixed 2.5 V reference | Select AD7606C-18 when synchronizing ≥2 channels is required; LTC2328HMS-18#PBF preferred for space-constrained single-channel designs needing ±10.24 V exact scaling. |
| ADS8860 | 16-bit, 1 MSPS, ±VREF input, external reference only, 1.8 V–3.3 V OVDD, 16-lead WQFN, no internal reference or buffer | Lower resolution, no integrated reference, smaller package, lower power (21 mW), but requires external 2.048 V reference and driver | Select ADS8860 for cost-sensitive, lower-resolution applications where board space and power are critical and external reference infrastructure exists. |
Compared with AD7606C-18 and ADS8860, the LTC2328HMS-18#PBF uniquely combines 18-bit resolution, ±10.24 V true bipolar input, integrated 2.048 V reference with buffer, and H-grade temperature rating in a compact 16-lead MSOP - offering optimal trade-off of precision, integration, and thermal ruggedness for single-channel industrial DAQ.
Availability
LTC2328HMS-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, long-term lifecycle support, and guaranteed extended-temperature performance.
Supply support for LTC2328HMS-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 technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC2328 family was designed by Linear Technology (acquired by ADI in 2017) specifically for high-accuracy, high-speed industrial data acquisition - emphasizing thermal stability, integrated references, and robust packaging for harsh environments.
FAQ
What is the maximum operating temperature of the LTC2328HMS-18#PBF?
The LTC2328HMS-18#PBF is rated for continuous operation from –40°C to +125°C (H-grade). This specification is guaranteed across all electrical parameters in the datasheet, including ±5 LSB INL, 95 dB SNR, and 1 Msps throughput - making it suitable for under-hood automotive, downhole oil & gas, and high-ambient industrial applications where thermal reliability is critical. The 16-lead MSOP package features θJA = 110°C/W.
Does the LTC2328HMS-18#PBF require an external reference?
No, the LTC2328HMS-18#PBF does not require an external reference. It integrates a factory-trimmed 2.048 V bandgap reference (20 ppm/°C max drift) and a gain-of-2 reference buffer delivering 4.096 V at REFBUF. With REFIN = 2.048 V and REFBUF = 4.096 V, the device achieves its specified ±10.24 V input range. External references are optional for enhanced accuracy or different input ranges.
How does the daisy-chain mode work on the LTC2328HMS-18#PBF?
Daisy-chain mode is enabled by driving CHAIN (Pin 10) high. In this mode, RDL/SDI becomes SDI (serial data input), allowing multiple LTC2328HMS-18#PBF devices to be cascaded. The first device's SDO connects to the next device's SDI; all share one SCK and CNV. Conversion results shift out sequentially on a single SDO line, reducing FPGA I/O count and simplifying multi-channel synchronization without additional control logic.
What is the power consumption of the LTC2328HMS-18#PBF at 1 Msps?
At 1 Msps sampling rate, the LTC2328HMS-18#PBF consumes 14.5 mA from VDD and 10 mA from OVDD (typical), totaling ~50 mW dissipation. Power scales linearly with sample rate due to automatic nap mode between conversions. In sleep mode, total current drops to 300 µA (IVDD + IOVDD), reducing dissipation to 0.3 mW - enabling ultra-low-power standby in battery-operated or energy-conscious systems.
Is the LTC2328HMS-18#PBF pin-compatible with other members of the LTC2328 family?
Yes, the LTC2328HMS-18#PBF is pin-compatible with the C-grade (0°C to 70°C) and I-grade (–40°C to 85°C) variants - LTC2328CMS-18#PBF and LTC2328IMS-18#PBF - all housed in identical 16-lead MSOP packages with identical pin functions, electrical characteristics, and timing behavior. Only the guaranteed temperature range and some parametric limits (e.g., INL, SNR min) differ per grade.
LTC2328HMS-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):
- 1M
- 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:
- -
LTC2328HMS-18#PBF FAQ
1.How can I place an order for LTC2328HMS-18#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2328HMS-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 LTC2328HMS-18#PBF reliable?
The price and inventory of LTC2328HMS-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 LTC2328HMS-18#PBF is usually 5 days.
3.What payment methods are accepted for LTC2328HMS-18#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2328HMS-18#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2328HMS-18#PBF?
LTC2328HMS-18#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2328HMS-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 LTC2328HMS-18#PBF?
For technical support, including LTC2328HMS-18#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2328HMS-18#PBF requirements.
6.How does Aetrix verify that LTC2328HMS-18#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2328HMS-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 LTC2328HMS-18#PBF meets industry standards.
7.What is the process for return or replacement of LTC2328HMS-18#PBF?
All LTC2328HMS-18#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2328HMS-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 LTC2328HMS-18#PBF part is unused and in its original packaging.
Return procedure for LTC2328HMS-18#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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