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Analog Devices Inc. LTC2377CMS-18#TRPBF
- Part No.:
- LTC2377CMS-18#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TFSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2377CMS-18#TRPBF.pdf
- Description:
- IC ADC 18BIT SAR 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,727
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Product details
Overview
LTC2377CMS-18#TRPBF 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 to 5.1V reference). It operates from a single 2.5V supply, consumes only 6.8mW at full speed, and features digital gain compression (DGC) for single-supply amplifier interfacing - used in high-speed data acquisition and medical imaging systems.
For engineers reviewing the LTC2377CMS-18#TRPBF datasheet, LTC2377CMS-18#TRPBF pinout, LTC2377CMS-18#TRPBF application, or LTC2377CMS-18#TRPBF equivalent, key selection criteria include guaranteed 18-bit no-missing-codes performance, daisy-chain SPI interface compatibility, internal conversion clock, operation up to 125°C (H-grade variant), and DGC-enabled 0.5V–4.5V input range with 5V reference.
Technical Context
The LTC2377CMS-18#TRPBF implements a charge redistribution capacitor DAC (CDAC) architecture with differential comparator and 18-bit successive approximation logic. Conversion is initiated by a rising edge on CNV, with no pipeline delay and fixed 1.5µs conversion time, enabling deterministic timing in real-time control loops.
Its digital gain compression (DGC) function remaps zero-scale from 0V to 0.1·VREF and full-scale from VREF to 0.9·VREF, preserving full 18-bit resolution while allowing single-supply driver amplifiers - eliminating need for negative rails without sacrificing dynamic range or linearity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 18-bit - delivers 262,144 distinct output codes with guaranteed no missing codes across temperature. |
| Sampling Rate | 500ksps - supports real-time capture of signals up to 250kHz Nyquist bandwidth with no cycle latency. |
| SNR | 102dB (typ, fIN = 2kHz, VREF = 5V) - enables >16.9 effective number of bits (ENOB) in precision measurement. |
| INL | ±1.75LSB (max) - ensures monotonicity and accurate representation of small signal changes in sensor interfaces. |
| Power Dissipation | 6.8mW at 500ksps - reduces thermal load in compact instrumentation and extends battery life in portable systems. |
| Digital I/O Voltage | 1.8V to 5V compatible - allows direct interfacing with FPGA, MCU, or ASIC I/O banks without level shifters. |
| Reference Range | 2.5V to 5.1V - supports flexible system-level scaling from low-voltage sensors to industrial ±10V inputs via external drivers. |
Pinout & Package
Package: 16-lead MSOP (4.0mm × 3.0mm), exposed pad not present (DFN variant has exposed pad; MSOP does not).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CHAIN (1) | Mode selector | Low = normal SPI mode (RDL/SDI as bus enable); high = daisy-chain mode (RDL/SDI as serial data input). |
| VDD (2) | Analog supply | 2.5V ±62.5mV supply for core ADC circuitry; requires 10µF ceramic bypass to GND. |
| GND (3,6,10,16) | Ground reference | Four dedicated ground pins minimize ground bounce and improve PSRR in high-speed sampling. |
| IN+, IN– (4,5) | Differential analog inputs | Accept ±VREF fully differential input; 45pF sampling capacitance and 40Ω switch RON define drive requirements. |
| REF (7) | Reference voltage input | 2.5V–5.1V external reference; decoupled with 47µF X5R ceramic capacitor for low-noise operation. |
| REF/DGC (8) | Reference/DGC control | Tied to REF → DGC disabled (±VREF range); tied to GND → DGC enabled (0.1–0.9·VREF range). |
| CNV (9) | Convert trigger | Rising-edge–initiated conversion; powers up ADC and starts acquisition phase with deterministic timing. |
| BUSY (11) | Status indicator | Active-high open-drain output signaling conversion progress; synchronizes host read timing. |
| RDL/SDI (12) | Serial interface control/data | Function depends on CHAIN state; enables SDO or accepts daisy-chain input data. |
| SCK (13) | Serial clock input | Supports up to 100MHz SCK (10ns period); controls MSB-first data shift-out timing on SDO. |
| SDO (14) | Serial data output | 2's complement 18-bit result; valid within 9.5ns of SCK↑ (CL = 20pF); supports daisy-chain readout. |
| OVDD (15) | Digital I/O supply | 1.71V–5.25V logic supply; sets VIH/VIL thresholds and powers SPI interface independently of VDD. |
Key Features
| Feature | Design Value |
|---|---|
| Digital Gain Compression (DGC) | Enables single-supply amplifier operation by mapping full-scale input to 10%–90% of ±VREF, preserving full 18-bit resolution without negative rail. |
| No Pipeline Delay | Zero-cycle latency ensures immediate availability of conversion results - critical for closed-loop control and real-time triggering. |
| Auto Power-Down | Reduces current to 0.9µA between conversions, scaling power linearly with sample rate for battery-powered applications. |
| Internal Conversion Clock | Eliminates need for external timing components; simplifies layout and improves jitter immunity in noise-sensitive environments. |
| 125°C Operation (H-grade) | Guaranteed performance over –40°C to +125°C ambient - suitable for under-hood automotive and industrial edge nodes. |
Applications
| Medical Imaging Signal Chain | High-Speed Industrial DAQ |
|---|---|
Use Scenario: Digitizing low-noise CT/MRI front-end signals requiring >16 ENOB and minimal harmonic distortion. IC Role / Device Role / Timing Role: Primary SAR ADC capturing differential sensor outputs at 500ksps with deterministic CNV-triggered timing. Use Value: 102dB SNR and –124dB THD preserve image fidelity; DGC eliminates dual-supply op-amps, reducing BOM cost and board area. | Use Scenario: Real-time monitoring of motor vibration, pressure transients, or power quality waveforms in factory automation. IC Role / Device Role / Timing Role: High-fidelity data acquisition node synchronized to PLC triggers via CNV input and BUSY status. Use Value: No missing codes and ±1.75LSB INL ensure accurate amplitude tracking; daisy-chain SPI supports multi-channel expansion without added GPIO. |
| Portable Precision Instrumentation | ATE Test Equipment |
Use Scenario: Battery-powered handheld multimeters or spectrum analyzers needing low power and high DC accuracy. IC Role / Device Role / Timing Role: Core ADC operating in auto power-down mode between measurements to extend runtime. Use Value: 6.8µW standby power (500sps) and 6.8mW active power enable >24-hour operation; 18-bit resolution supports µV-level DC measurements. | Use Scenario: Modular ATE systems requiring fast, repeatable digitization of DUT outputs across multiple channels. IC Role / Device Role / Timing Role: Channel-synchronized ADC in parallel or daisy-chain configuration with precise CNV edge alignment. Use Value: Internal oscillator removes clock skew between modules; 1.5µs conversion time enables tight test cycle timing budgets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-resolution SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7986BCPZ-RL7 | 18-bit, 1MSPS, 11.5mW; no DGC; SPI-only (no daisy-chain); 2.5V–5V ref range. | Higher speed but higher power; lacks DGC for single-supply driver simplification. | Select when throughput >500ksps is required and dual-supply drivers are acceptable. |
| ADS8860IPWR | 16-bit, 1MSPS, 3.3mW; no DGC; 2.5V–5V ref; SPI with daisy-chain support. | Lower resolution (16-bit), lower power, same package footprint; no guaranteed no-missing-codes spec. | Select when 16-bit resolution suffices and ultra-low power (<3.3mW) is prioritized over 18-bit fidelity. |
Compared with AD7986BCPZ-RL7 and ADS8860IPWR, the LTC2377CMS-18#TRPBF uniquely balances 18-bit no-missing-codes integrity, DGC-enabled single-supply interface simplicity, and 6.8mW/500ksps efficiency - making it optimal for space-constrained, thermally sensitive, or cost-sensitive high-precision systems where driver complexity must be minimized.
Availability
LTC2377CMS-18#TRPBF is available at Aetrix Electronics and suitable for medical imaging, high-speed data acquisition, and portable instrumentation requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for LTC2377CMS-18#TRPBF 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 LTC2377-18 belongs to ADI's precision SAR ADC product line, designed specifically for applications demanding high resolution, low power, and deterministic timing - including portable test equipment, medical diagnostics, and industrial process control.
FAQ
What is the maximum sampling rate of the LTC2377CMS-18#TRPBF?
The LTC2377CMS-18#TRPBF achieves a maximum sampling rate of 500ksps with no cycle latency. This is guaranteed across its operating temperature range (0°C to 70°C for the C-grade version denoted by 'CMS'), and the conversion time remains fixed at 1.5µs regardless of throughput setting - enabling precise timing predictability in real-time systems.
Does the LTC2377CMS-18#TRPBF support daisy-chain configuration?
Yes, the LTC2377CMS-18#TRPBF supports daisy-chain mode via the CHAIN pin (Pin 1). When CHAIN is high, the RDL/SDI pin functions as serial data input, allowing multiple LTC2377CMS-18#TRPBF devices to share a single SPI bus. Data from each device shifts out sequentially on SDO, reducing GPIO count and simplifying multi-channel designs.
How does Digital Gain Compression (DGC) work in the LTC2377CMS-18#TRPBF?
Digital Gain Compression (DGC) in the LTC2377CMS-18#TRPBF is enabled by grounding the REF/DGC pin (Pin 8). It digitally remaps the zero-scale code from 0V to 0.1·VREF and full-scale code from VREF to 0.9·VREF. With a 5V reference, this yields a usable input range of 0.5V to 4.5V - permitting single-supply amplifier operation while retaining full 18-bit resolution and linearity.
What is the supply voltage requirement for the LTC2377CMS-18#TRPBF?
The LTC2377CMS-18#TRPBF requires two independent supplies: VDD = 2.375V to 2.625V (nominal 2.5V) for the analog core, and OVDD = 1.71V to 5.25V for the digital I/O interface. This separation allows interfacing with 1.8V, 2.5V, 3.3V, or 5V logic families without level shifters, while maintaining analog performance integrity.
Is the LTC2377CMS-18#TRPBF pin-compatible with other variants in the LTC2377 family?
Yes, the LTC2377CMS-18#TRPBF shares identical pinout and footprint with all MSOP-packaged variants (e.g., LTC2377IMS-18#TRPBF, LTC2377HMS-18#TRPBF). Differences lie solely in temperature grade (0°C–70°C for CMS, –40°C–85°C for IMS, –40°C–125°C for HMS) and associated screening - enabling drop-in replacement during design iteration or qualification ramp-up.
LTC2377CMS-18#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TFSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2377CMS-18#TRPBF FAQ
1.How can I place an order for LTC2377CMS-18#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2377CMS-18#TRPBF 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 LTC2377CMS-18#TRPBF reliable?
The price and inventory of LTC2377CMS-18#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2377CMS-18#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2377CMS-18#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2377CMS-18#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2377CMS-18#TRPBF?
LTC2377CMS-18#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2377CMS-18#TRPBF 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 LTC2377CMS-18#TRPBF?
For technical support, including LTC2377CMS-18#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2377CMS-18#TRPBF requirements.
6.How does Aetrix verify that LTC2377CMS-18#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2377CMS-18#TRPBF 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 LTC2377CMS-18#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2377CMS-18#TRPBF?
All LTC2377CMS-18#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2377CMS-18#TRPBF, 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 LTC2377CMS-18#TRPBF part is unused and in its original packaging.
Return procedure for LTC2377CMS-18#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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