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Analog Devices Inc. LTC2377HMS-18#PBF
- Part No.:
- LTC2377HMS-18#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TFSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2377HMS-18#PBF.pdf
- Description:
- IC ADC 18BIT SAR 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,661
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Product details
Overview
LTC2377HMS-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 only 6.8mW at full speed, and features digital gain compression (DGC) for single-supply amplifier interfacing-used in high-speed data acquisition systems requiring precision and low power.
For engineers reviewing the LTC2377HMS-18#PBF datasheet, LTC2377HMS-18#PBF pinout, LTC2377HMS-18#PBF application, or LTC2377HMS-18#PBF equivalent, key selection criteria include guaranteed 18-bit no-missing-codes operation over –40°C to +125°C, SPI-compatible daisy-chain interface, internal conversion clock, zero-cycle-latency throughput, and DGC-enabled 0.5V–4.5V input swing with 5V reference.
Technical Context
The LTC2377HMS-18#PBF implements a charge-redistribution SAR architecture with a 18-bit CDAC and differential comparator, sampling the IN+/IN– inputs during acquisition and executing binary-search conversion without pipeline delay. Its internal oscillator eliminates external clock dependency, and auto power-down reduces current to 0.9µA between conversions.
Digital gain compression (DGC) is controlled via the REF/DGC pin: when grounded, it digitally remaps zero-scale from 0V to 0.1·VREF and full-scale from VREF to 0.9·VREF-enabling rail-to-rail amplifier output swing while preserving full 18-bit resolution. The device supports 1.8V–5V I/O logic levels via separate OVDD supply and offers daisy-chain mode via CHAIN and RDL/SDI pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 18-bit-guaranteed no missing codes across full temperature range (–40°C to +125°C). |
| Sampling Rate | 500ksps-zero-cycle-latency throughput enables real-time control loop sampling without buffering delay. |
| SNR | 102dB typical at fIN = 2kHz with 5V reference-supports >16.6 effective number of bits (ENOB) in precision measurement. |
| INL | ±1.75LSB maximum-ensures monotonicity and accurate DC linearity for calibration-critical instrumentation. |
| Power Consumption | 6.8mW at 500ksps (2.5V VDD)-enables portable, thermally constrained designs without active cooling. |
| Input Range | Fully differential ±VREF, VREF = 2.5V to 5.1V-flexible scaling for sensor interfaces from industrial transducers to medical front-ends. |
| DGC Function | Enables 0.5V–4.5V input swing with 5V reference-allows single 5.5V supply for driving amplifiers like LT6350-H. |
Pinout & Package
Package: 16-lead MSOP (4.0mm × 3.0mm), exposed pad not present (DFN variant has exposed pad; MSOP does not). Rated for –40°C to +125°C operation (H-grade).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CHAIN) | Chain Mode Selector | High enables daisy-chain serial input (RDL/SDI becomes SDI); low enables bus-enable mode for SDO control. |
| 2 (VDD) | Analog Core Supply | 2.375V–2.625V supply for ADC core; bypass with 10µF ceramic capacitor to GND. |
| 4,5 (IN+, IN–) | Differential Analog Inputs | Accept ±VREF fully differential signal; 45pF input capacitance and 40Ω switch RON define settling behavior. |
| 7 (REF) | Reference Input | 2.5V–5.1V external reference; requires 47µF X5R ceramic decoupling at pin. |
| 8 (REF/DGC) | Reference/Digital Gain Control | Tied to GND enables DGC (0.1–0.9·VREF mapping); tied to REF disables DGC (full ±VREF range). |
| 9 (CNV) | Convert Trigger | Rising edge initiates conversion and powers up ADC; asynchronous, no timing setup required. |
| 11 (BUSY) | Conversion Status Indicator | Active-high open-drain output signals conversion in progress; used for timing synchronization. |
| 12 (RDL/SDI) | Serial Bus Enable / Data Input | In normal mode: controls SDO tri-state; in chain mode: accepts serial data from upstream ADC. |
| 13 (SCK) | Serial Clock Input | Accepts 10ns min period (100MHz max); drives SDO output on rising edge in MSB-first 2's complement format. |
| 14 (SDO) | Serial Data Output | Tri-stateable 18-bit output; driven only when RDL/SDI is low or in chain mode with valid SCK. |
| 15 (OVDD) | Digital I/O Supply | 1.71V–5.25V logic supply; sets VIH/VIL thresholds and powers SDO driver; bypass with 0.1µF capacitor. |
| 3,6,10,16 (GND) | Analog & Digital Ground | Four dedicated ground pins minimize ground bounce; must be connected to low-impedance PCB ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Digital Gain Compression (DGC) | Eliminates need for negative supply in driving amplifiers by remapping full-scale range to 10%–90% of ±VREF-reducing system BOM count and power. |
| No Pipeline Delay / Zero Cycle Latency | Delivers first valid conversion result immediately after CNV rising edge-critical for deterministic real-time control applications. |
| Internal Conversion Clock | Removes dependency on external timing circuitry; simplifies layout and improves jitter immunity in noisy environments. |
| Auto Power-Down Between Conversions | Reduces quiescent current to 0.9µA (H-grade), scaling power linearly with sample rate-ideal for battery-powered DAQ. |
| SPI-Compatible Daisy-Chain Interface | Enables synchronous readout of multiple LTC2377HMS-18#PBF devices using single SCK/SDO lines-reducing FPGA GPIO usage and PCB routing complexity. |
Applications
| Medical Imaging Signal Chain | Industrial Process Monitoring |
|---|---|
Use Scenario: Digitizing low-noise, wide-dynamic-range signals from CT/MRI detector front-ends operating at ambient to elevated temperatures. IC Role / Device Role / Timing Role: Primary high-resolution ADC capturing analog sensor outputs with minimal latency and thermal drift. Use Value: 102dB SNR and ±1.75LSB INL ensure diagnostic-grade image fidelity; H-grade rating guarantees reliability at 125°C junction temperature in sealed enclosures. |
Use Scenario: High-speed monitoring of pressure, temperature, and flow sensors in oil & gas PLC modules deployed in harsh field environments. IC Role / Device Role / Timing Role: Precision data acquisition node interfacing with isolated analog conditioners and feeding FPGA-based control logic. Use Value: DGC enables single-supply 5.5V amplifier biasing, reducing system power and board area; daisy-chain mode simplifies multi-channel synchronization. |
| Portable Test Equipment | Automated Test Equipment (ATE) |
Use Scenario: Battery-powered handheld oscilloscopes and spectrum analyzers requiring high ENOB and low standby power. IC Role / Device Role / Timing Role: Core digitizer delivering 500ksps continuous capture with minimal thermal rise and long runtime. Use Value: 6.8mW active power and 0.9µA shutdown current extend battery life; 18-bit no-missing-codes ensures accurate waveform reconstruction. |
Use Scenario: Modular ATE slot cards performing parametric testing of mixed-signal ICs under temperature stress (–40°C to +125°C). IC Role / Device Role / Timing Role: High-accuracy reference ADC validating DUT output linearity and noise performance across temperature extremes. Use Value: Guaranteed H-grade specs-including INL, SNR, and THD-enable traceable metrology-grade measurements without derating. |
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, 5MSPS, but requires external reference and clock; higher power (43mW); no DGC; LVDS interface. | Targeted at ultra-high-speed systems where latency <200ns is critical; less suitable for low-power or single-supply amplifier interfaces. | Select AD7960BCPZ-RL7 only when >500ksps throughput is mandatory and system can accommodate higher power and external timing. |
| ADS8860IDRCT | 16-bit, 1MSPS, SPI interface, 1.8V supply; no DGC; lower SNR (92.5dB); smaller 3mm × 3mm WSON package. | Optimized for cost-sensitive, space-constrained applications where 16-bit resolution suffices and thermal range is limited to –40°C to +85°C. | Choose ADS8860IDRCT for compact, lower-cost designs accepting 2-bit resolution trade-off and omitting DGC requirement. |
Compared with AD7960BCPZ-RL7 and ADS8860IDRCT, the LTC2377HMS-18#PBF uniquely balances 18-bit precision, 500ksps speed, ultra-low power, integrated DGC, and extended temperature support-making it optimal for thermally demanding, battery-aware, or single-supply amplifier-coupled systems.
Availability
LTC2377HMS-18#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 across extended temperature ranges and long production lifecycles.
Supply support for LTC2377HMS-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 LTC2377HMS-18#PBF belongs to ADI's legacy Linear Technology precision SAR ADC product line, designed specifically for applications demanding high dynamic range, low power, and robust operation in extended temperature environments.
FAQ
What is the operating temperature range of the LTC2377HMS-18#PBF?
The LTC2377HMS-18#PBF is rated for –40°C to +125°C ambient operation (H-grade), with all key specifications-including INL, SNR, and THD-guaranteed across this full range. This makes the LTC2377HMS-18#PBF suitable for under-hood automotive sensing, downhole oil & gas tools, and enclosed industrial controllers where thermal management is constrained.
Does the LTC2377HMS-18#PBF require an external clock source?
No-the LTC2377HMS-18#PBF integrates an internal oscillator that sets conversion timing, eliminating the need for an external clock. This simplifies system design, reduces component count, and improves jitter immunity. The SCK pin is used solely for serial data transfer timing and accepts up to 100MHz, independent of conversion timing.
How does Digital Gain Compression (DGC) work in the LTC2377HMS-18#PBF?
DGC in the LTC2377HMS-18#PBF is enabled by grounding the REF/DGC pin. It digitally remaps the zero-scale code from 0V to 0.1·VREF and full-scale code from VREF to 0.9·VREF-effectively compressing the usable input range to 0.5V–4.5V with a 5V reference. This allows driving amplifiers like the LT6350-H to operate from a single 5.5V supply while retaining full 18-bit resolution.
Can the LTC2377HMS-18#PBF be used in daisy-chain configuration?
Yes-the LTC2377HMS-18#PBF supports daisy-chain mode via the CHAIN pin. When CHAIN is high, the RDL/SDI pin functions as serial data input, allowing multiple LTC2377HMS-18#PBF devices to share one SCK and SDO line. Each device shifts its 18-bit result into the next, enabling synchronized multi-channel acquisition with minimal interface overhead.
What are the power supply requirements for the LTC2377HMS-18#PBF?
The LTC2377HMS-18#PBF requires two supplies: VDD = 2.375V–2.625V (2.5V nominal) for the analog core, and OVDD = 1.71V–5.25V for digital I/O. VDD must be bypassed with a 10µF ceramic capacitor; OVDD requires a 0.1µF capacitor. Reference voltage (REF) ranges from 2.5V to 5.1V and must be decoupled with a 47µF X5R capacitor.
LTC2377HMS-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):
- 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:
- -40°C ~ 125°C
- Supplier Device Package:
- 16-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2377HMS-18#PBF FAQ
1.How can I place an order for LTC2377HMS-18#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2377HMS-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 LTC2377HMS-18#PBF reliable?
The price and inventory of LTC2377HMS-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 LTC2377HMS-18#PBF is usually 5 days.
3.What payment methods are accepted for LTC2377HMS-18#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2377HMS-18#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2377HMS-18#PBF?
LTC2377HMS-18#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2377HMS-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 LTC2377HMS-18#PBF?
For technical support, including LTC2377HMS-18#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2377HMS-18#PBF requirements.
6.How does Aetrix verify that LTC2377HMS-18#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2377HMS-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 LTC2377HMS-18#PBF meets industry standards.
7.What is the process for return or replacement of LTC2377HMS-18#PBF?
All LTC2377HMS-18#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2377HMS-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 LTC2377HMS-18#PBF part is unused and in its original packaging.
Return procedure for LTC2377HMS-18#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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