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Analog Devices Inc. LTC2379HMS-18#PBF
- Part No.:
- LTC2379HMS-18#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TFSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2379HMS-18#PBF.pdf
- Description:
- IC ADC 18BIT SAR 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,902
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Product details
Overview
LTC2379HMS-18#PBF from Analog Devices (formerly Linear Technology) is an 18-bit, 1.6 Msps successive approximation register (SAR) analog-to-digital converter with ±2 LSB INL max, 101.2 dB SNR at 2 kHz, and digital gain compression (DGC) support. It operates from a single 2.5 V supply, accepts ±VREF differential inputs (VREF = 2.5 V to 5.1 V), and delivers no missing codes across its full resolution - enabling high-fidelity signal acquisition in precision instrumentation and industrial control systems.
For engineers reviewing the LTC2379HMS-18#PBF datasheet, LTC2379HMS-18#PBF pinout, LTC2379HMS-18#PBF application, or LTC2379HMS-18#PBF equivalent, this page provides verified specifications, thermal-grade packaging details (–40°C to +125°C), DGC configuration guidance, SPI interface timing constraints, and validated alternative options for high-speed, low-noise data acquisition designs.
Technical Context
The LTC2379HMS-18#PBF implements a fully differential SAR architecture with internal conversion clock, eliminating external timing dependencies. Its charge redistribution CDAC samples input voltage during acquisition (200 ns minimum), then executes binary-weighted comparisons against VREF/2, VREF/4, ..., VREF/262144 using a high-precision differential comparator.
Digital Gain Compression (DGC) is controlled via the REF/DGC pin: when grounded, it remaps zero-scale from 0 V to 0.1·VREF and full-scale from VREF to 0.9·VREF, enabling single-supply amplifier drive (e.g., LT6350 from +5.5 V) while preserving 18-bit resolution. The device supports daisy-chain SPI mode via CHAIN and RDL/SDI pins for multi-ADC synchronization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 18-bit - delivers 262,144 discrete output levels for ultra-fine amplitude quantization. |
| Sampling Rate | 1.6 Msps - enables real-time capture of signals up to 800 kHz Nyquist bandwidth. |
| SNR | 101.2 dB (typ, fIN = 2 kHz, VREF = 5 V) - supports >16.8 effective bits under typical conditions. |
| INL | ±2 LSB (max, –40°C to +125°C) - ensures monotonicity and accurate end-point linearity over full temperature range. |
| Power Dissipation | 18 mW at 1.6 Msps - achieves 11.25 µW per sample, critical for thermally constrained or battery-assisted systems. |
| Input Range | ±VREF fully differential (VREF = 2.5 V to 5.1 V) - accommodates wide dynamic range sensor outputs without external scaling. |
| Digital Interface | SPI-compatible, 1.8 V to 5 V I/O logic - interoperable with FPGA, MCU, and DSP host interfaces across voltage domains. |
Pinout & Package
Package: 16-lead MSOP (4.0 mm × 3.0 mm), rated for –40°C to +125°C operation. Exposed pad not present in MSOP variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+, IN– | Differential analog input terminals | Accept ±VREF input swing; 45 pF sampling capacitance and 40 Ω switch resistance define settling requirements. |
| REF | Reference voltage input | Defines full-scale range; requires 47 µF X5R ceramic decoupling close to pin for noise immunity. |
| REF/DGC | Reference/Digital Gain Compression control | Ground to enable DGC (0.5 V–4.5 V input range with 5 V reference); tie to REF to disable. |
| CNV | Convert trigger input | Rising edge initiates acquisition and conversion; powers up internal circuitry from auto-power-down state. |
| BUSY | Conversion status indicator | Active-high open-drain output signals ongoing conversion; used for timing coordination or interrupt generation. |
| SDO, SCK, RDL/SDI, CHAIN | SPI serial interface signals | Support standard and daisy-chain modes; SDO outputs 2's complement 18-bit data MSB-first on SCK rising edges. |
| VDD, OVDD, GND | Power supplies | VDD = 2.375–2.625 V (core); OVDD = 1.71–5.25 V (I/O); separate supplies isolate digital noise from analog domain. |
Key Features
| Feature | Design Value |
|---|---|
| Digital Gain Compression (DGC) | Eliminates need for negative supply in front-end amplifiers by shifting usable input range to 10–90% of ±VREF, enabling single-rail +5.5 V LT6350 operation. |
| No Pipeline Delay / Zero Cycle Latency | Delivers first valid conversion result immediately after CNV rising edge - essential for deterministic real-time control loops. |
| Auto Power-Down Between Conversions | Reduces current draw to ≤0.9 µA (H-grade) during idle periods, scaling power linearly with sample rate for energy-efficient operation. |
| Guaranteed Operation to +125°C | Specified performance (INL, SNR, THD) maintained across full –40°C to +125°C range - qualified for under-hood automotive and downhole industrial use. |
| Internal Conversion Clock | Removes dependency on external clock source or PLL; simplifies PCB layout and reduces BOM count in space-constrained systems. |
Applications
| Medical Imaging Signal Chain | High-Speed Industrial Data Acquisition |
|---|---|
Use Scenario: Digitizing low-amplitude, high-frequency ultrasound echo signals in portable imaging systems. IC Role / Device Role / Timing Role: Primary SAR ADC capturing 1.6 Msps RF data with 101.2 dB SNR to preserve tissue contrast resolution. Use Value: DGC allows single-supply +5.5 V LNA/PGA design, reducing board area and power vs. dual-rail alternatives. |
Use Scenario: Real-time monitoring of motor phase currents and vibration spectra in predictive maintenance gateways. IC Role / Device Role / Timing Role: High-accuracy front-end ADC interfacing with isolated current sensors and anti-aliasing filters. Use Value: ±2 LSB INL and no missing codes ensure faithful representation of transient fault signatures across temperature extremes. |
| Portable Precision Test Equipment | Aerospace Avionics Sensor Interface |
Use Scenario: Handheld multimeters and waveform analyzers requiring battery longevity and metrology-grade accuracy. IC Role / Device Role / Timing Role: Core digitizer operating at 1.6 Msps with auto power-down to extend runtime between charges. Use Value: 18 mW active power and 0.9 µA shutdown current enable >10-hour operation on compact Li-ion cells. |
Use Scenario: Conditioning and digitizing inertial measurement unit (IMU) outputs in flight control computers. IC Role / Device Role / Timing Role: Radiation-tolerant-capable ADC (per Analog Devices H-grade qualification) handling ±5 V differential gyro/accelerometer signals. Use Value: Guaranteed –40°C to +125°C operation and 125°C junction temperature rating meet DO-160E environmental stress requirements. |
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 |
|---|---|---|---|
| AD7960BCPZ-RL7 | 18-bit, 5 Msps, 99.5 dB SNR, requires external reference and clock; no DGC; 32-lead LFCSP package. | Higher throughput but higher power (39 mW); lacks integrated DGC and internal clock - demands more external components. | Select when >1.6 Msps sampling is required and system can accommodate external timing/reference complexity. |
| LTC2380-16#PBF | 16-bit, 2 Msps, 96.5 dB SNR, same MSOP package, –40°C to +125°C grade, includes DGC and internal clock. | Lower resolution and SNR than LTC2379HMS-18#PBF, but faster sampling and identical thermal/feature compatibility. | Select when 16-bit resolution suffices and higher throughput (2 Msps) or lower cost is prioritized over 18-bit fidelity. |
Compared with AD7960BCPZ-RL7 and LTC2380-16#PBF, the LTC2379HMS-18#PBF uniquely balances 18-bit resolution, 1.6 Msps speed, integrated DGC, internal clock, and extended temperature capability in a compact MSOP - making it optimal for space- and power-constrained high-accuracy systems where design simplicity and thermal robustness are critical.
Availability
LTC2379HMS-18#PBF is available at Aetrix Electronics and suitable for medical imaging signal chains, high-speed industrial data acquisition, and portable precision test equipment requiring stable component supply across extended temperature ranges.
Supply support for LTC2379HMS-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 LTC2379-18 product line was developed by Linear Technology (acquired by ADI in 2017) to deliver ultra-low-noise, low-power, high-speed SAR ADCs for demanding instrumentation and control applications requiring guaranteed 18-bit performance over wide temperature ranges.
FAQ
What is the maximum operating temperature specification for the LTC2379HMS-18#PBF?
The LTC2379HMS-18#PBF is rated for continuous operation from –40°C to +125°C ambient temperature. This H-grade qualification is confirmed in the Absolute Maximum Ratings table and supported by temperature-tracked performance data (INL, SNR, THD) across the full range in the datasheet's Typical Performance Characteristics section.
How does Digital Gain Compression (DGC) affect the input voltage range of the LTC2379HMS-18#PBF?
When the REF/DGC pin is grounded, the LTC2379HMS-18#PBF enables DGC, mapping zero-scale code to 0.1·VREF and full-scale code to 0.9·VREF. With a 5 V reference, this yields a usable input range of 0.5 V to 4.5 V - providing 0.5 V headroom at each rail to allow single-supply amplifier operation without negative rails.
Does the LTC2379HMS-18#PBF require an external clock source?
No. The LTC2379HMS-18#PBF integrates an internal oscillator that sets conversion timing. This eliminates the need for an external clock generator or PLL, simplifying system timing architecture and reducing component count - a key advantage over alternatives like the AD7960 which require precise external clocking.
What package type and lead finish does the LTC2379HMS-18#PBF use?
The LTC2379HMS-18#PBF uses a 16-lead plastic MSOP package with lead-free (Pb-free) matte tin finish, compliant with RoHS Directive 2011/65/EU. The part marking "237918" appears on the top surface, and the temperature grade (H) is indicated on the shipping container label per Linear Technology order information documentation.
Can the LTC2379HMS-18#PBF be daisy-chained with other ADCs for synchronized sampling?
Yes. The LTC2379HMS-18#PBF supports daisy-chain mode via the CHAIN pin and RDL/SDI pin reconfiguration. When CHAIN is high, RDL/SDI becomes SDI, allowing serial data from a preceding ADC to feed into the LTC2379HMS-18#PBF's SDO output - enabling synchronized multi-channel acquisition without additional timing controllers.
LTC2379HMS-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):
- 1.6M
- 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:
- -
LTC2379HMS-18#PBF FAQ
1.How can I place an order for LTC2379HMS-18#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2379HMS-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 LTC2379HMS-18#PBF reliable?
The price and inventory of LTC2379HMS-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 LTC2379HMS-18#PBF is usually 5 days.
3.What payment methods are accepted for LTC2379HMS-18#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2379HMS-18#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2379HMS-18#PBF?
LTC2379HMS-18#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2379HMS-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 LTC2379HMS-18#PBF?
For technical support, including LTC2379HMS-18#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2379HMS-18#PBF requirements.
6.How does Aetrix verify that LTC2379HMS-18#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2379HMS-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 LTC2379HMS-18#PBF meets industry standards.
7.What is the process for return or replacement of LTC2379HMS-18#PBF?
All LTC2379HMS-18#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2379HMS-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 LTC2379HMS-18#PBF part is unused and in its original packaging.
Return procedure for LTC2379HMS-18#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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