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Analog Devices Inc. LTC2379IMS-18#PBF
- Part No.:
- LTC2379IMS-18#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TFSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2379IMS-18#PBF.pdf
- Description:
- IC ADC 18BIT SAR 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,774
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Product details
Overview
LTC2379IMS-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 fully differential ±VREF input range (2.5 V to 5.1 V). It operates from a single 2.5 V supply, consumes 18 mW at full speed, and features digital gain compression (DGC) for single-supply amplifier interfacing - used in high-speed data acquisition and precision instrumentation.
For engineers reviewing the LTC2379IMS-18#PBF datasheet, LTC2379IMS-18#PBF pinout, LTC2379IMS-18#PBF application, or LTC2379IMS-18#PBF equivalent, key selection criteria include guaranteed 18-bit no-missing-codes operation, internal conversion clock, SPI-compatible daisy-chain interface, 16-lead MSOP package with –40°C to +85°C temperature rating, and DGC-enabled 0.5 V to 4.5 V input range with 5 V reference.
Technical Context
The LTC2379IMS-18#PBF implements a charge-redistribution SAR architecture with a 18-bit CDAC and differential comparator, supporting true bipolar input sampling without pipeline latency. Its internal oscillator eliminates external clock dependency, and auto power-down scales current consumption with sampling rate - 18 µW at 1.6 ksps.
Digital gain compression (DGC) remaps zero-scale from 0 V to 0.1·VREF and full-scale from VREF to 0.9·VREF, enabling rail-to-rail single-supply amplifier drive while preserving full 18-bit resolution. The device supports 1.8 V to 5 V I/O logic levels via dedicated OVDD supply and offers daisy-chain mode via CHAIN/SDI pin reconfiguration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 18-bit - delivers 262,144 distinct output codes with guaranteed no missing codes across full temperature range. |
| Sampling Rate | 1.6 Msps - enables real-time digitization of signals up to ~34 MHz input bandwidth (–3 dB) with 200 ns transient response. |
| SNR | 101.2 dB (typ, fIN = 2 kHz, VREF = 5 V) - corresponds to effective resolution >16.5 bits under typical conditions. |
| INL | ±2 LSB (max) - ensures monotonicity and accurate end-point linearity for calibration-critical applications. |
| Power Consumption | 18 mW at 1.6 Msps - low quiescent current (7.2–8.6 mA total supply current) eases thermal design in compact systems. |
| Reference Range | 2.5 V to 5.1 V - supports flexible system-level scaling and compatibility with common precision references. |
| Digital Gain Compression | Enabled by grounding REF/DGC pin - shifts usable input range to 0.5 V–4.5 V with 5 V reference, eliminating need for negative amplifier supply. |
Pinout & Package
Package: 16-lead plastic MSOP (5.0 mm × 4.0 mm × 1.1 mm), exposed pad not present (unlike DFN variant), rated for –40°C to +85°C operating temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CHAIN (1) | Mode control input | Selects normal mode (RDL/SDI = bus enable) or daisy-chain mode (RDL/SDI = serial data input); logic referenced to VDD. |
| VDD (2) | Analog supply | 2.5 V ±62.5 mV main supply; bypassed with 10 µF ceramic capacitor to GND for noise suppression. |
| GND (3,6,10,16) | Ground reference | Four dedicated ground pins minimize ground bounce and improve PSRR; must be connected to low-impedance PCB ground plane. |
| IN+, IN– (4,5) | Differential analog inputs | Accept ±VREF fully differential signal; input capacitance 45 pF (sample mode), RON ≈ 40 Ω; require matched trace routing. |
| REF (7) | Reference voltage input | 2.5 V–5.1 V external reference; decoupled with 47 µF X5R ceramic (0805) directly at pin for stability. |
| REF/DGC (8) | Reference/DGC mode select | Tied to REF → standard ±VREF range; tied to GND → DGC active (0.1·VREF to 0.9·VREF mapping). |
| CNV (9) | Convert trigger | Rising-edge–initiated conversion start; powers up ADC and begins acquisition phase; timing-critical for jitter-sensitive applications. |
| BUSY (11) | Status indicator | Active-high open-drain output signaling conversion in progress; used for handshaking with FPGA/microcontroller. |
| RDL/SDI (12) | Serial interface control/data | In normal mode: bus enable (active-low); in chain mode: serial data input (MSB-first, SPI-compatible). |
| SCK (13) | Serial clock input | Accepts 10 ns min period (100 MHz max), supports 1.8 V–5 V logic; controls data shift-out timing on SDO. |
| SDO (14) | Serial data output | 2's complement 18-bit result shifted MSB-first; valid within 9.5 ns of SCK↑; compatible with daisy-chain cascading. |
| OVDD (15) | Digital I/O supply | 1.71 V–5.25 V logic supply; sets VIH/VIL thresholds; bypassed with 0.1 µF ceramic capacitor to GND. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay / zero cycle latency | Enables deterministic real-time control loops and immediate post-conversion processing without FIFO buffering. |
| Digital gain compression (DGC) | Eliminates need for dual-supply op-amps driving IN+/IN–, reducing BOM count and board area in portable instrumentation. |
| Internal conversion clock | Removes external clock source dependency and associated jitter, simplifying layout and improving SNR consistency. |
| Auto power-down between conversions | Reduces average power to 18 µW at 1.6 ksps - critical for battery-powered ATE and field-deployed sensors. |
| SPI-compatible daisy-chain mode | Supports multi-channel synchronized sampling with single SCK/SDO bus, minimizing microcontroller GPIO usage and PCB routing. |
| Guaranteed operation to 125°C (H-grade variants) | Validated performance over extended temperature range - applicable to industrial process control and downhole sensing. |
Applications
| Medical Imaging Signal Chain | High-Speed Industrial Data Acquisition |
|---|---|
Use Scenario: Digitizing low-noise CT/MRI sensor outputs requiring high dynamic range and minimal harmonic distortion. IC Role / Device Role / Timing Role: Primary 18-bit SAR ADC capturing analog front-end signals with 101.2 dB SNR and –120 dB THD at 2 kHz. Use Value: Enables detection of subtle tissue contrast gradients without amplification-induced noise floor elevation or clipping artifacts. |
Use Scenario: Real-time monitoring of motor phase currents and vibration spectra in predictive maintenance systems. IC Role / Device Role / Timing Role: High-throughput ADC sampling at 1.6 Msps with deterministic BUSY-driven readout for FPGA-based FFT analysis. Use Value: Captures transient fault signatures (e.g., bearing defects) with sufficient resolution to distinguish harmonics below –120 dB. |
| Portable Precision Instrumentation | Automated Test Equipment (ATE) |
Use Scenario: Battery-powered handheld multimeters and impedance analyzers demanding low power and high DC accuracy. IC Role / Device Role / Timing Role: Low-power 18-bit ADC with 18 µW standby current and ±2 LSB INL for calibrated DC voltage/current measurement. Use Value: Extends battery life while maintaining metrology-grade linearity and repeatability across temperature. |
Use Scenario: Channel-dense ATE systems requiring synchronized multi-ADC capture with minimal inter-channel skew. IC Role / Device Role / Timing Role: Daisy-chained LTC2379IMS-18#PBF units sharing one SCK/SDO bus for time-aligned sampling across 8+ channels. Use Value: Eliminates need for multiple SPI controllers or complex clock distribution networks, reducing test head complexity. |
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 | 20-bit, 5 Msps, 1.8 V/5 V dual-supply interface; requires external reference; no DGC; 32-lead LFCSP. | Higher resolution/speed but higher power (43 mW) and no integrated DGC - demands more complex analog front-end design. | Choose when >18-bit resolution and >1.6 Msps throughput are mandatory, and system can accommodate higher power and external ref. |
| LTC2380-16IMS#PBF | 16-bit, 2 Msps, same MSOP-16 package; 96.5 dB SNR; 12 mW power; shares DGC, daisy-chain, and pinout compatibility. | Lower resolution but faster sampling and lower power - suitable where 16-bit fidelity suffices and cost or power is constrained. | Choose for drop-in migration path if 16-bit resolution meets system requirements and faster throughput is beneficial. |
Compared with AD7960BCPZ-RL7, the LTC2379IMS-18#PBF trades 2 bits and 3.4 Msps for integrated DGC, lower power, and simpler supply scheme; versus LTC2380-16IMS#PBF, it delivers 2 extra bits at 0.4 Msps lower speed and 6 mW higher power - ideal for resolution-critical, thermally constrained designs.
Availability
LTC2379IMS-18#PBF is available at Aetrix Electronics and suitable for medical imaging signal chains, high-speed industrial data acquisition, and portable precision instrumentation requiring stable component supply, long-term lifecycle support, and guaranteed –40°C to +85°C operation.
Supply support for LTC2379IMS-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 LTC2379IMS-18#PBF belongs to ADI's precision SAR ADC product line, designed specifically for applications demanding high resolution, low noise, and low power in space- and energy-constrained systems - especially where single-supply signal conditioning is required.
FAQ
What is the maximum sampling rate of the LTC2379IMS-18#PBF?
The LTC2379IMS-18#PBF achieves a maximum sampling rate of 1.6 Msps with no pipeline delay or cycle latency. This is guaranteed across its full operating temperature range (–40°C to +85°C) and supported by internal timing circuitry that eliminates external clock dependencies. At this rate, the conversion time is 360–412 ns, and the minimum time between conversions is 625 ns.
Does the LTC2379IMS-18#PBF support daisy-chain configuration?
Yes, the LTC2379IMS-18#PBF supports daisy-chain mode via the CHAIN pin (Pin 1). When CHAIN is high, the RDL/SDI pin functions as a serial data input, allowing multiple LTC2379IMS-18#PBF devices to share a single SCK/SDO bus. Data from upstream devices shifts through each part sequentially, enabling synchronized multi-channel acquisition without additional controller resources.
How does Digital Gain Compression (DGC) work in the LTC2379IMS-18#PBF?
Digital Gain Compression (DGC) in the LTC2379IMS-18#PBF is activated by grounding the REF/DGC pin (Pin 8). This remaps the zero-scale code from 0 V to 0.1·VREF and full-scale code from VREF to 0.9·VREF. With a 5 V reference, the effective input range becomes 0.5 V to 4.5 V - enabling single-supply amplifiers (e.g., LT6350) to drive IN+/IN– without negative rails while preserving full 18-bit resolution.
What are the supply voltage requirements for the LTC2379IMS-18#PBF?
The LTC2379IMS-18#PBF requires two independent supplies: VDD (2.375 V to 2.625 V, nominally 2.5 V) for analog core operation, and OVDD (1.71 V to 5.25 V) for digital I/O interface logic. VDD must be bypassed with a 10 µF ceramic capacitor, and OVDD with a 0.1 µF ceramic capacitor. REF input accepts 2.5 V to 5.1 V and must be decoupled with a 47 µF X5R capacitor.
Is the LTC2379IMS-18#PBF pin-compatible with other members of the LTC2379 family?
Yes, the LTC2379IMS-18#PBF is pin-compatible with all MSOP-packaged variants of the LTC2379 family (e.g., LTC2379CMS-18#PBF, LTC2379HMS-18#PBF), sharing identical 16-pin MSOP footprint, pin functions, and electrical interface. Differences are limited to temperature grade (–40°C to +85°C for I-grade), internal trimming, and specified performance limits - enabling direct substitution in existing layouts.
LTC2379IMS-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 ~ 85°C
- Supplier Device Package:
- 16-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2379IMS-18#PBF FAQ
1.How can I place an order for LTC2379IMS-18#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2379IMS-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 LTC2379IMS-18#PBF reliable?
The price and inventory of LTC2379IMS-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 LTC2379IMS-18#PBF is usually 5 days.
3.What payment methods are accepted for LTC2379IMS-18#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2379IMS-18#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2379IMS-18#PBF?
LTC2379IMS-18#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2379IMS-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 LTC2379IMS-18#PBF?
For technical support, including LTC2379IMS-18#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2379IMS-18#PBF requirements.
6.How does Aetrix verify that LTC2379IMS-18#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2379IMS-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 LTC2379IMS-18#PBF meets industry standards.
7.What is the process for return or replacement of LTC2379IMS-18#PBF?
All LTC2379IMS-18#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2379IMS-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 LTC2379IMS-18#PBF part is unused and in its original packaging.
Return procedure for LTC2379IMS-18#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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