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Analog Devices Inc. LTC2377CDE-18#PBF
- Part No.:
- LTC2377CDE-18#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LTC2377CDE-18#PBF.pdf
- Description:
- IC ADC 18BIT SAR 16DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,153
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Product details
Overview
LTC2377CDE-18#PBF from Analog Devices (formerly Linear Technology) is an 18-bit, 500ksps successive approximation register (SAR) analog-to-digital converter with ±1.75LSB INL max, 102dB SNR at 2kHz, and fully differential ±VREF input range (2.5V–5.1V). It operates from a single 2.5V supply, consumes 6.8mW at full speed, and features digital gain compression (DGC) to enable single-supply amplifier driving-used in high-speed data acquisition systems requiring precision, low power, and wide dynamic range.
For engineers reviewing the LTC2377CDE-18#PBF datasheet, LTC2377CDE-18#PBF pinout, LTC2377CDE-18#PBF application, or LTC2377CDE-18#PBF equivalent, key selection criteria include guaranteed 18-bit no-missing-codes performance, daisy-chain SPI interface compatibility (1.8V–5V I/O), internal conversion clock, zero-cycle latency, and operation across 0°C to 70°C in a 4mm × 3mm DFN package.
Technical Context
The LTC2377CDE-18#PBF implements a charge redistribution capacitor DAC (CDAC) architecture with differential comparator and internal oscillator-controlled timing, eliminating external clock dependency. Its acquisition phase samples differential voltage across IN+/IN– using 45pF sampling capacitance and 40Ω switch RON, followed by a deterministic 1.5µs conversion time.
Digital gain compression (DGC) is controlled via the REF/DGC pin: when grounded, it remaps zero-scale from 0V to 0.1·VREF and full-scale from VREF to 0.9·VREF, enabling 0.5V–4.5V input swing with 5V reference-preserving full 18-bit resolution while allowing single 5.5V-supply amplifier biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 18-bit-guaranteed no missing codes over full temperature range. |
| Sampling Rate | 500ksps-maximum throughput with zero pipeline delay or cycle latency. |
| SNR | 102dB typical at fIN = 2kHz, VREF = 5V-enables high-fidelity signal capture in medical imaging and instrumentation. |
| INL | ±1.75LSB maximum-ensures accurate end-point linearity for calibrated measurement systems. |
| Power Consumption | 6.8mW at 500ksps, 6.8µW at 500sps-supports battery-operated or thermally constrained designs. |
| Reference Range | 2.5V to 5.1V-flexible scaling for varying signal chain headroom and noise budget requirements. |
| Digital Interface | SPI-compatible serial I/O with daisy-chain mode-reduces host GPIO count in multi-channel systems. |
Pinout & Package
Package: 16-lead (4mm × 3mm) plastic DFN with exposed pad (Pin 17), RoHS-compliant, rated for 0°C to 70°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+, IN– | Differential analog inputs | Accept ±VREF fully differential signal; 45pF sampling capacitance, 40Ω switch RON; require matched layout and low-impedance drive. |
| REF | Reference voltage input | 2.5V–5.1V range; decoupled with 47µF X5R ceramic capacitor; defines LSB size (e.g., 38µV at 5V ref). |
| REF/DGC | Digital gain compression control | Ground to enable DGC (0.5V–4.5V input range with 5V ref); tie to REF to disable (±5V input range). |
| CNV | Convert trigger input | Rising-edge initiates acquisition and conversion; powers up device from auto power-down state. |
| BUSY | Conversion status indicator | Active-high open-drain output signals conversion progress; used for timing synchronization or interrupt generation. |
| SDO, SCK, RDL/SDI, CHAIN | SPI serial interface | MSB-first 2's complement output; supports 1.8V–5V logic levels; CHAIN high enables daisy-chain mode for multi-ADC readout. |
| VDD, OVDD, GND | Power supplies | VDD = 2.375–2.625V (core); OVDD = 1.71–5.25V (I/O); exposed pad (Pin 17) must be soldered to PCB ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Digital Gain Compression (DGC) | Enables single-supply amplifier operation (e.g., LT6350 from +5.5V) by compressing full-scale input to 10%–90% of ±VREF, preserving 18-bit resolution without negative rail. |
| No Cycle Latency | First conversion completes in fixed 2µs after CNV rising edge-ideal for deterministic real-time control loops and burst-mode sampling. |
| Auto Power-Down | Reduces current to ≤0.9µA between conversions-scales power linearly with sample rate for ultra-low average power in intermittent acquisition. |
| Internal Conversion Clock | Eliminates need for external timing components; ensures consistent tCONV = 1–1.5µs across temperature and supply variations. |
| Guaranteed Operation to 70°C | Specified performance (INL, SNR, THD) maintained across full commercial temperature range-no derating required for industrial ambient conditions. |
Applications
| Medical Imaging Signal Chain | Portable High-Speed Data Logger |
|---|---|
Use Scenario: Digitizing low-noise, wide-dynamic-range analog outputs from ultrasound beamformer channels or MRI gradient amplifiers. IC Role / Device Role / Timing Role: Primary SAR ADC capturing 500ksps differential sensor data with 102dB SNR and <±2LSB INL for quantitative image reconstruction. Use Value: Enables sub-0.1% amplitude accuracy and minimal harmonic distortion-critical for artifact-free B-mode and Doppler processing. |
Use Scenario: Battery-powered field instrument recording vibration, acoustic emission, or environmental sensor data over extended periods. IC Role / Device Role / Timing Role: Low-power 18-bit ADC operating at adaptive sample rates (500ksps to 500sps) with automatic power-down between bursts. Use Value: Achieves 6.8µW standby power and 6.8mW active power-extends lithium battery life to months while retaining DC-coupled precision. |
| Industrial Process Control Loop | Automated Test Equipment (ATE) |
Use Scenario: Closed-loop feedback acquisition in PLC analog I/O modules monitoring motor currents, pressure transducers, or thermal sensors. IC Role / Device Role / Timing Role: High-linearity ADC interfacing with isolated ±10V or 4–20mA front-ends via LT6350 driver, delivering stable 18-bit codes under EMI stress. Use Value: ±1.75LSB INL and 86dB CMRR ensure <0.01% gain error drift across 0°C–70°C-meeting SIL-2 functional safety calibration requirements. |
Use Scenario: Multi-channel parametric test system validating high-speed ICs with synchronized sampling across dozens of nodes. IC Role / Device Role / Timing Role: SPI daisy-chain configured ADC enabling simultaneous 500ksps capture on 8+ channels with single SCK/SDO bus. Use Value: Eliminates per-channel timing skew and reduces FPGA resource count-cutting test head complexity and cost by >30%. |
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 |
|---|---|---|---|
| AD7985BRUZ | 18-bit, 2.5MSPS, 3.3V supply only; no DGC; SPI interface lacks daisy-chain mode; higher 14.5mW power at full speed. | Higher throughput but requires dual-supply op-amps and tighter layout for >100dB SNR; less suitable for single-supply portable systems. | Select AD7985BRUZ only when >500ksps sampling is mandatory and system can accommodate higher power and complex analog front-end design. |
| ADS8860IDRCT | 16-bit, 1MSPS, 2.5–5V supply; no DGC; SPI with daisy-chain; 100dB SNR; lower 2.5mW power at 1MSPS. | Lower resolution limits dynamic range in demanding medical or metrology use cases; better suited for cost-sensitive 16-bit applications. | Choose ADS8860IDRCT where 16-bit resolution suffices and ultra-low power (<3mW) is prioritized over 18-bit fidelity and DGC flexibility. |
Compared with AD7985BRUZ and ADS8860IDRCT, the LTC2377CDE-18#PBF uniquely balances 18-bit precision, 500ksps speed, DGC-enabled single-supply operation, and daisy-chain scalability-making it optimal for compact, battery-aware, high-fidelity acquisition where full resolution and analog simplification are jointly critical.
Availability
LTC2377CDE-18#PBF is available at Aetrix Electronics and suitable for medical imaging signal chains, portable high-speed data loggers, and industrial process control systems requiring stable component supply, long-term manufacturability, and guaranteed commercial-temperature performance.
Supply support for LTC2377CDE-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, serving industrial, automotive, communications, and healthcare markets.
The LTC2377CDE-18#PBF belongs to ADI's legacy Linear Technology precision SAR ADC family, engineered for applications demanding low noise, low power, and high DC/AC accuracy-including instrumentation, medical devices, and automated test equipment.
FAQ
What is the operating temperature range for the LTC2377CDE-18#PBF?
The LTC2377CDE-18#PBF is specified for 0°C to 70°C operation-the "C" grade in its part number denotes commercial temperature range. All key specifications including ±1.75LSB INL, 102dB SNR, and 500ksps throughput are guaranteed across this full range without derating.
Does the LTC2377CDE-18#PBF require an external clock source?
No, the LTC2377CDE-18#PBF integrates an internal oscillator that sets conversion timing. This eliminates external clock components and ensures consistent 1–1.5µs conversion time across temperature and supply variations-simplifying system timing design.
How does Digital Gain Compression (DGC) work in the LTC2377CDE-18#PBF?
In the LTC2377CDE-18#PBF, DGC is enabled by grounding the REF/DGC pin. This digitally remaps zero-scale from 0V to 0.1·VREF and full-scale from VREF to 0.9·VREF, yielding a 0.5V–4.5V input range with 5V reference-allowing single-supply amplifier operation while preserving full 18-bit resolution.
What package type is used for the LTC2377CDE-18#PBF?
The LTC2377CDE-18#PBF uses a 16-lead plastic DFN package measuring 4mm × 3mm with an exposed thermal pad (Pin 17). This compact, RoHS-compliant package supports high-density PCB layouts and requires soldering the exposed pad directly to the ground plane for thermal and electrical integrity.
Can the LTC2377CDE-18#PBF interface with 1.8V logic systems?
Yes, the LTC2377CDE-18#PBF supports 1.8V, 2.5V, 3.3V, and 5V logic levels on its SPI interface (SCK, SDO, RDL/SDI, BUSY, CNV, CHAIN) via the OVDD supply pin. Setting OVDD = 1.8V configures all digital I/O for 1.8V-compatible operation without level-shifting circuitry.
LTC2377CDE-18#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:
- 18
- Sampling Rate (Per Second):
- 500k
- 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:
- 0°C ~ 70°C
- Supplier Device Package:
- 16-DFN (4x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2377CDE-18#PBF FAQ
1.How can I place an order for LTC2377CDE-18#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2377CDE-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 LTC2377CDE-18#PBF reliable?
The price and inventory of LTC2377CDE-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 LTC2377CDE-18#PBF is usually 5 days.
3.What payment methods are accepted for LTC2377CDE-18#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2377CDE-18#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2377CDE-18#PBF?
LTC2377CDE-18#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2377CDE-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 LTC2377CDE-18#PBF?
For technical support, including LTC2377CDE-18#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2377CDE-18#PBF requirements.
6.How does Aetrix verify that LTC2377CDE-18#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2377CDE-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 LTC2377CDE-18#PBF meets industry standards.
7.What is the process for return or replacement of LTC2377CDE-18#PBF?
All LTC2377CDE-18#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2377CDE-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 LTC2377CDE-18#PBF part is unused and in its original packaging.
Return procedure for LTC2377CDE-18#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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