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Analog Devices Inc. LTC2378IDE-16#PBF
- Part No.:
- LTC2378IDE-16#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LTC2378IDE-16#PBF.pdf
- Description:
- IC ADC 16BIT SAR 16DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,566
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Product details
Overview
LTC2378IDE-16#PBF from Analog Devices (formerly Linear Technology) is a 16-bit, 1 Msps successive approximation register (SAR) analog-to-digital converter with ±0.5 LSB INL max, 97 dB SNR at 2 kHz, and fully differential ±VREF input range (VREF = 2.5 V to 5.1 V). It operates from a 2.5 V analog supply and supports 1.8 V–5 V I/O logic, enabling direct interfacing with diverse host processors in high-precision data acquisition systems.
For engineers reviewing the LTC2378IDE-16#PBF datasheet, LTC2378IDE-16#PBF pinout, LTC2378IDE-16#PBF application, or LTC2378IDE-16#PBF equivalent, key selection criteria include guaranteed 16-bit no-missing-codes operation, digital gain compression (DGC) for single-supply amplifier drive, internal conversion clock, daisy-chain SPI interface, and –40°C to +85°C industrial temperature rating in 4 mm × 3 mm DFN package.
Technical Context
The LTC2378IDE-16#PBF implements a charge-redistribution SAR architecture with a 16-bit capacitive DAC and differential comparator. Conversion timing is governed by an internal oscillator (no external clock required), delivering fixed 460 ns conversion time and zero cycle latency. Its fully differential input stage supports common-mode rejection >86 dB up to 500 kHz and accepts input signals within ±VREF with 0.1 V headroom margins.
Digital gain compression (DGC) is controlled via the REF/DGC pin: when grounded, it remaps full-scale input from ±VREF to 0.1×VREF to 0.9×VREF, enabling use of single-rail amplifiers (e.g., LT6350 on +5.5 V only). The SPI-compatible serial interface supports 1.8 V–5 V OVDD and includes daisy-chain mode via CHAIN and RDL/SDI pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - guarantees monotonic transfer function and no missing codes across full operating temperature range. |
| Sampling Rate | 1 Msps - enables real-time capture of signals up to 34 MHz input bandwidth (–3 dB point) without pipeline delay. |
| SNR | 97 dB (typ, fIN = 2 kHz, VREF = 5 V) - supports >15.8 effective bits (ENOB) in precision measurement applications. |
| INL | ±0.5 LSB (max) - ensures accurate end-point linearity critical for closed-loop control and calibration systems. |
| Power Dissipation | 13.5 mW at 1 Msps - low quiescent current (0.9 µA in power-down mode) extends battery life in portable instrumentation. |
| Input Range | ±VREF, VREF = 2.5 V to 5.1 V - flexible reference scaling allows optimization of dynamic range for sensor or signal chain output levels. |
| Digital Gain Compression | Enabled via REF/DGC = GND - shifts usable input span to 0.5 V–4.5 V (at VREF = 5 V), eliminating need for negative supply in front-end amplifiers. |
Pinout & Package
Package: 16-lead (4 mm × 3 mm) plastic DFN with exposed pad (Pin 17 = GND, must be soldered to PCB ground plane). Thermal resistance θJA = 40°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CHAIN (1) | Chain Mode Selector | High enables daisy-chain SPI mode; low configures RDL/SDI as bus enable (not SDI). |
| VDD (2) | Analog Supply | 2.5 V ±62.5 mV supply for core ADC; requires 10 µF ceramic bypass to GND. |
| GND (3,6,10,16) | Analog/Digital Ground | Four dedicated ground pins minimize noise coupling between analog and digital sections. |
| IN+, IN– (4,5) | Differential Analog Inputs | Accept ±VREF input; input capacitance = 45 pF (sample mode); common-mode range = VREF/2 ±0.1 V. |
| REF (7) | Reference Input | 2.5 V–5.1 V external reference; decoupled with 47 µF X5R 0805 capacitor. |
| REF/DGC (8) | Reference/Digital Gain Control | Tied to REF → standard ±VREF range; tied to GND → DGC active (0.1–0.9×VREF span). |
| CNV (9) | Convert Trigger | Rising edge initiates conversion and powers up ADC; no minimum pulse width requirement. |
| BUSY (11) | Conversion Status | Active-high open-drain output; asserts at CNV↑, deasserts after tCONV (460 ns min). |
| RDL/SDI (12) | Serial Data Control/Input | In normal mode: bus enable; in chain mode: serial data input for daisy-chained devices. |
| SCK (13) | Serial Clock | Accepts up to 100 MHz SCK (10 ns period); controls MSB-first data shift on rising edge. |
| SDO (14) | Serial Data Output | 2's complement 16-bit output; valid 9.5 ns after SCK↑ (CL = 20 pF); tri-state when RDL = low. |
| OVDD (15) | I/O Supply | 1.71 V–5.25 V logic supply; sets VIH/VIL thresholds; bypassed with 0.1 µF capacitor. |
| GND (17, Exposed Pad) | Thermal & Electrical Ground | DFN-specific thermal pad; mandatory solder connection to PCB ground plane for thermal and EMI performance. |
Key Features
| Feature | Design Value |
|---|---|
| Digital Gain Compression (DGC) | Eliminates need for dual-rail op-amp supplies by digitally compressing full-scale input to 0.1–0.9×VREF, preserving 16-bit resolution while enabling single +5.5 V amplifier operation. |
| No Pipeline Delay / Zero Cycle Latency | Immediate availability of conversion result after BUSY deassertion-critical for deterministic real-time control loops and trigger-based sampling. |
| Internal Conversion Clock | Removes dependency on external timing sources; simplifies system design and improves jitter immunity compared to externally clocked SAR ADCs. |
| Daisy-Chain SPI Interface | Enables synchronous readout of multiple LTC2378-16 devices using single SCK/SDO lines-reducing FPGA/GPIO count and PCB routing complexity in multi-channel systems. |
| Guaranteed Operation to 125°C (H-grade variants) | While LTC2378IDE-16#PBF is rated –40°C to +85°C, the same silicon supports extended temperature grades-enabling reuse of layout and firmware across industrial and automotive platforms. |
Applications
| Medical Imaging Signal Chain | Industrial Process Monitoring |
|---|---|
Use Scenario: Digitizing low-noise, wide-dynamic-range signals from ultrasound transducer arrays or MRI gradient coils requiring high fidelity and minimal harmonic distortion. IC Role / Device Role / Timing Role: Primary high-speed, high-resolution ADC capturing analog front-end outputs with precise timing alignment and minimal aperture jitter (4 ps). Use Value: 97 dB SNR and –122 dB THD ensure accurate representation of weak physiological signals buried in noise, supporting early disease detection and quantitative imaging analysis. | Use Scenario: High-accuracy voltage/current sensing in PLC analog input modules where long-term stability and temperature resilience are critical under factory ambient conditions. IC Role / Device Role / Timing Role: Precision digitizer for isolated sensor interfaces, leveraging ±0.5 LSB INL and guaranteed no-missing-codes over –40°C to +85°C. Use Value: Enables <16-bit accuracy without post-fabrication calibration, reducing BOM cost and field maintenance while meeting IEC 61000-4 immunity requirements. |
| Portable Test Equipment | Automated Test Equipment (ATE) |
Use Scenario: Battery-powered handheld oscilloscopes or spectrum analyzers needing low power consumption without sacrificing resolution or sampling speed. IC Role / Device Role / Timing Role: Core ADC with auto power-down between conversions, reducing average power to 13.5 µW at 1 ksps while maintaining 16-bit integrity. Use Value: Extends battery life beyond 8 hours per charge in Class I handheld instruments while retaining 1 Msps burst capture capability for transient event analysis. | Use Scenario: Multi-channel parallel digitization in semiconductor wafer probers or board-level functional testers requiring synchronized sampling and deterministic latency. IC Role / Device Role / Timing Role: Synchronized SAR ADC in daisy-chain configuration, driven by shared CNV and SCK signals across 8+ channels. Use Value: Eliminates inter-channel skew (<1 ns) and enables simultaneous sampling across all channels-critical for parametric testing of high-speed digital ICs. |
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, 2.5 V supply, SPI interface, but requires external reference and clock; no DGC; higher power (36 mW at 5 Msps). | Targeted at ultra-high-resolution applications (>16-bit ENOB) where sampling rate >1 Msps is mandatory and system can accommodate external timing/reference. | Select AD7960BCPZ-RL7 when 18-bit resolution and 5 Msps throughput outweigh added system complexity and power budget constraints. |
| ADS8860IRGET | 16-bit, 1 Msps, 2.5 V supply, SPI interface, integrated reference, but no DGC; lower SNR (92.5 dB typ); smaller 3 mm × 3 mm VQFN package. | Optimized for space-constrained, cost-sensitive designs where integrated reference simplifies layout but DGC and highest SNR are non-critical. | Select ADS8860IRGET for compact, low-BOM-count data loggers where 92.5 dB SNR suffices and reference integration reduces component count. |
Compared with AD7960BCPZ-RL7 and ADS8860IRGET, the LTC2378IDE-16#PBF uniquely combines 16-bit no-missing-codes assurance, on-chip DGC for simplified analog front-end design, and best-in-class 97 dB SNR at 1 Msps-making it optimal for industrial and medical systems demanding both precision and architectural simplicity.
Availability
LTC2378IDE-16#PBF is available at Aetrix Electronics and suitable for medical imaging signal chains, industrial process monitoring systems, and portable test equipment requiring stable component supply, guaranteed –40°C to +85°C operation, and long-term production continuity.
Supply support for LTC2378IDE-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 LTC2378-16 product line was designed to deliver uncompromised DC accuracy and AC performance in low-power, pin-compatible SAR ADCs-specifically targeting high-fidelity data acquisition where 16-bit integrity, low noise, and flexible input drive are essential.
FAQ
What is the operating temperature range of the LTC2378IDE-16#PBF?
The LTC2378IDE-16#PBF is specified for operation from –40°C to +85°C. This industrial temperature grade is confirmed in the Absolute Maximum Ratings table and Order Information section of the official datasheet, and applies to the DFN package variant with part marking "23786". The device maintains full 16-bit no-missing-codes performance and ±0.5 LSB INL across this range.
Does the LTC2378IDE-16#PBF require an external clock source?
No, the LTC2378IDE-16#PBF does not require an external clock source. It features an internal oscillator that sets the conversion time (tCONV = 460 ns min), eliminating external timing dependencies. The SCK pin is used solely for serial data transfer timing-not for conversion control-allowing flexible host processor clocking and reducing system jitter sensitivity.
How does Digital Gain Compression (DGC) work in the LTC2378IDE-16#PBF?
Digital Gain Compression (DGC) in the LTC2378IDE-16#PBF is enabled by grounding the REF/DGC pin (Pin 8). This remaps the full-scale input range from ±VREF to 0.1×VREF to 0.9×VREF. For VREF = 5 V, the usable analog input becomes 0.5 V to 4.5 V, allowing single-supply amplifiers (e.g., LT6350 on +5.5 V) to drive the ADC without negative rails-preserving full 16-bit resolution and linearity.
What package type is used for the LTC2378IDE-16#PBF?
The LTC2378IDE-16#PBF uses a 16-lead plastic DFN package measuring 4 mm × 3 mm with an exposed thermal pad (Pin 17 = GND). This package is distinct from the MSOP variant (e.g., LTC2378IMS-16#PBF) and requires soldering the exposed pad directly to the PCB ground plane to meet thermal specification (θJA = 40°C/W) and ensure reliable operation.
Can the LTC2378IDE-16#PBF interface with a 1.8 V microcontroller?
Yes, the LTC2378IDE-16#PBF supports 1.8 V I/O logic through its OVDD supply pin (Pin 15), which accepts 1.71 V to 5.25 V. When OVDD = 1.8 V, the SDO output high level is ≥1.6 V and low level ≤0.36 V, and the SCK, CNV, CHAIN, and BUSY inputs recognize 1.8 V–compatible thresholds-enabling direct, level-shift-free connection to 1.8 V microcontrollers or FPGAs.
LTC2378IDE-16#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 1M
- 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-DFN (4x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2378IDE-16#PBF FAQ
1.How can I place an order for LTC2378IDE-16#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2378IDE-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 LTC2378IDE-16#PBF reliable?
The price and inventory of LTC2378IDE-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 LTC2378IDE-16#PBF is usually 5 days.
3.What payment methods are accepted for LTC2378IDE-16#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2378IDE-16#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2378IDE-16#PBF?
LTC2378IDE-16#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2378IDE-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 LTC2378IDE-16#PBF?
For technical support, including LTC2378IDE-16#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2378IDE-16#PBF requirements.
6.How does Aetrix verify that LTC2378IDE-16#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2378IDE-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 LTC2378IDE-16#PBF meets industry standards.
7.What is the process for return or replacement of LTC2378IDE-16#PBF?
All LTC2378IDE-16#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2378IDE-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 LTC2378IDE-16#PBF part is unused and in its original packaging.
Return procedure for LTC2378IDE-16#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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