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Analog Devices Inc. LTC2376IMS-18#PBF
- Part No.:
- LTC2376IMS-18#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TFSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2376IMS-18#PBF.pdf
- Description:
- IC ADC 18BIT SAR 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,231
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Product details
Overview
LTC2376IMS-18#PBF from Analog Devices (formerly Linear Technology) is an 18-bit, 250ksps 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 analog supply and supports 1.8V–5V I/O logic, enabling high-precision data acquisition in compact, low-power systems such as portable instrumentation and industrial process control.
For engineers reviewing the LTC2376IMS-18#PBF datasheet, LTC2376IMS-18#PBF pinout, LTC2376IMS-18#PBF application, or LTC2376IMS-18#PBF equivalent, key selection considerations include guaranteed 18-bit no-missing-codes operation, digital gain compression (DGC) for single-supply amplifier interfacing, internal conversion clock, daisy-chain SPI interface, and –40°C to +85°C extended temperature rating in MSOP package.
Technical Context
The LTC2376IMS-18#PBF 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 fixed 1.9–3µs conversion time set by an internal oscillator-eliminating external clock dependency and pipeline latency.
It features dual power domains: 2.5V VDD for analog core and programmable OVDD (1.71–5.25V) for digital I/O, enabling interoperability with mixed-voltage host systems. The REF/DGC pin selects between full ±VREF input range (DGC disabled) or compressed 0.1×VREF to 0.9×VREF range (DGC enabled), preserving 18-bit resolution while relaxing driver amplifier supply requirements.
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 | 250ksps - enables real-time capture of signals up to ~125kHz Nyquist bandwidth without undersampling. |
| SNR | 102dB (typ, fIN = 2kHz, VREF = 5V) - corresponds to effective noise floor of ~1.2µV RMS in ±5V full-scale range. |
| INL | ±1.75LSB (max) - ensures monotonicity and <0.004% full-scale linearity error for precision measurement applications. |
| Power Consumption | 3.4mW at 250ksps - achieves 13.6µW per sample, supporting battery-operated systems with sustained high-speed sampling. |
| Digital Interface | SPI-compatible serial I/O with daisy-chain mode - allows multi-ADC synchronization using single SCK/SDO bus without additional GPIOs. |
| Input Range | Fully differential ±VREF, VREF = 2.5V to 5.1V - supports flexible signal scaling and direct connection to precision reference buffers. |
Pinout & Package
Package: 16-lead plastic MSOP (3mm × 4.9mm), exposed pad not present (DFN variant has exposed pad; MSOP does not). Operating temperature range: –40°C to +85°C (I-grade).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CHAIN (1) | Mode selector | Low = normal SPI mode (RDL/SDI = bus enable); high = daisy-chain mode (RDL/SDI = serial data input). |
| VDD (2) | Analog supply | 2.5V ±62.5mV supply for ADC core; requires 10µF ceramic bypass to GND for noise suppression. |
| 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 swing; input capacitance 45pF (sample), 5pF (hold); common-mode range = VREF/2 ±0.1V. |
| REF (7) | Reference voltage input | 2.5V–5.1V external reference; decoupled with 47µF X5R ceramic capacitor at pin. |
| REF/DGC (8) | Reference mode control | Tied to REF → full ±VREF range; tied to GND → DGC enabled (0.1–0.9×VREF input span). |
| CNV (9) | Convert trigger | Rising-edge–initiated conversion; powers up ADC and starts acquisition phase with zero cycle latency. |
| BUSY (11) | Conversion status | Active-high open-drain indicator; asserts at CNV↑, deasserts when 18-bit result is ready on SDO. |
| RDL/SDI (12) | Serial interface control/data | In normal mode: RDL controls SDO tri-state; in chain mode: functions as SDI for upstream ADC data. |
| SCK (13) | Serial clock input | Accepts 1.8V–5V logic; supports up to 100MHz clock (10ns period); defines timing for SDO data shifts. |
| SDO (14) | Serial data output | 2's complement 18-bit output MSB-first; valid after tDSDO (9.5ns) from SCK↑; compatible with 1.8V–5V hosts. |
| OVDD (15) | Digital I/O supply | 1.71V–5.25V supply setting logic thresholds; bypassed with 0.1µF ceramic capacitor to GND. |
Key Features
| Feature | Design Value |
|---|---|
| Digital Gain Compression (DGC) | Enables single-supply (e.g., +5.5V) operation of driving amplifiers by mapping full-scale input to 0.1–0.9×VREF, eliminating need for negative rail. |
| No Pipeline Delay / Zero Cycle Latency | Every CNV edge initiates a complete conversion; output available within fixed tCONV (≤3µs), enabling deterministic real-time control loops. |
| Internal Conversion Clock | Removes dependency on external timing circuitry; simplifies layout and eliminates jitter sources from clock distribution paths. |
| Auto Power-Down Between Conversions | Reduces average power to 3.4µW at 250sps; scales linearly with sampling rate-critical for intermittent sensing applications. |
| Guaranteed Operation to 125°C (H-grade variants) | While LTC2376IMS-18#PBF is rated –40°C to +85°C, same die supports H-grade (–40°C to +125°C), confirming robust thermal design margin. |
Applications
| Medical Imaging Signal Chain | High-Speed Industrial Data Acquisition |
|---|---|
|
Use Scenario: Digitizing low-noise, wide-dynamic-range analog outputs from ultrasound transducer front-ends or MRI gradient coil monitors. IC Role / Device Role / Timing Role: Primary SAR ADC capturing 18-bit samples at 250ksps with 102dB SNR to preserve diagnostic image fidelity and contrast resolution. Use Value: DGC mode allows use of single-supply op-amps (e.g., LT6350) driving ±5V differential inputs, reducing BOM count and PCB area vs. dual-rail solutions. |
Use Scenario: Real-time monitoring of motor phase currents, vibration sensors, or pressure transducers in PLC-controlled factory equipment. IC Role / Device Role / Timing Role: High-accuracy, low-latency ADC interfaced via daisy-chained SPI to microcontroller for synchronized multi-channel sampling. Use Value: Guaranteed no-missing-codes and ±1.75LSB INL ensure traceable calibration over temperature, meeting IEC 61000-4-30 Class A power quality requirements. |
| Portable Precision Instrumentation | Automated Test Equipment (ATE) |
|
Use Scenario: Battery-powered handheld multimeters or portable spectrum analyzers requiring >100dB dynamic range in compact form factor. IC Role / Device Role / Timing Role: Low-power 18-bit ADC operating at 3.4mW (250ksps) with auto power-down during idle intervals to extend runtime. Use Value: 2.5V VDD + 1.8V OVDD support enables direct integration with ultra-low-voltage SoCs, minimizing level-shifting complexity and power loss. |
Use Scenario: Channel expansion in modular ATE systems where multiple ADCs must sample synchronously with sub-microsecond skew. IC Role / Device Role / Timing Role: SPI daisy-chain configuration enables precise inter-ADC timing alignment using shared SCK and CNV signals. Use Value: Fixed 1.9–3µs conversion time and BUSY signal allow deterministic scheduling of data reads-critical for high-throughput test sequencing. |
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 @ 1MSPS; uses external reference; no DGC; LVDS option available. | Higher speed but higher power; lacks integrated DGC and internal clock; requires external timing control. | Select when >250ksps throughput is mandatory and system can accommodate higher power and external clocking. |
| ADS8860IDRCT | 16-bit, 1MSPS, 2.5mW @ 1MSPS; SPI interface; no DGC; 1.8V supply only; smaller 3mm × 3mm WSON. | Lower resolution (16-bit), no DGC, narrower input range (±2.5V max); optimized for ultra-compact, lower-cost designs. | Select when 16-bit resolution suffices and board space is constrained, but avoid if DGC or 18-bit linearity is required. |
Compared with AD7986BCPZ-RL7 and ADS8860IDRCT, the LTC2376IMS-18#PBF uniquely balances 18-bit accuracy, 250ksps speed, ultra-low 3.4mW power, and DGC-enabled single-supply drive-making it optimal for thermally constrained, precision portable, or industrial systems where resolution and interface simplicity are prioritized over raw speed or minimal footprint.
Availability
LTC2376IMS-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 performance.
Supply support for LTC2376IMS-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, formed through the acquisition of Linear Technology in 2017.
The LTC2376-18 belongs to ADI's precision SAR ADC product line, designed specifically for applications demanding 18-bit accuracy, low power, and simplified analog front-end integration-including portable test equipment, industrial process control, and medical diagnostics.
FAQ
What is the operating temperature range for the LTC2376IMS-18#PBF?
The LTC2376IMS-18#PBF is specified for operation from –40°C to +85°C (I-grade). This rating is confirmed in the "Order Information" table of the datasheet, where "IMS" denotes the industrial temperature grade. Absolute maximum junction temperature is 150°C, with θJA = 110°C/W for the MSOP package.
Does the LTC2376IMS-18#PBF require an external clock source?
No, the LTC2376IMS-18#PBF does not require an external clock source. It incorporates an internal oscillator that sets the conversion time (1.9–3µs), eliminating external timing components and associated jitter. The SCK pin is used only for serial data transfer timing-not for conversion control.
How does Digital Gain Compression (DGC) function in the LTC2376IMS-18#PBF?
In the LTC2376IMS-18#PBF, DGC 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 (e.g., 0.5V–4.5V for VREF = 5V), allowing driver amplifiers to operate from a single positive supply while preserving all 18 bits of resolution.
What package type and pin count does the LTC2376IMS-18#PBF use?
The LTC2376IMS-18#PBF uses a 16-lead plastic MSOP package (3mm × 4.9mm body, 0.65mm pitch). It has no exposed thermal pad-unlike the DFN variant (e.g., LTC2376IDE-18#PBF)-and is pin-compatible with other LTC2376-x#PBF MSOP variants (C/I/H grades).
Is the LTC2376IMS-18#PBF pin-compatible with other members of the LTC2376 family?
Yes, the LTC2376IMS-18#PBF is pin-compatible with all MSOP-packaged LTC2376-x-18 variants (e.g., LTC2376CMS-18#PBF, LTC2376HMS-18#PBF), sharing identical pinout, package dimensions, and electrical interface. Only temperature grade and ordering suffix differ-enabling drop-in replacement across C/I/H grades where thermal requirements allow.
LTC2376IMS-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):
- 250k
- 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:
- -
LTC2376IMS-18#PBF FAQ
1.How can I place an order for LTC2376IMS-18#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2376IMS-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 LTC2376IMS-18#PBF reliable?
The price and inventory of LTC2376IMS-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 LTC2376IMS-18#PBF is usually 5 days.
3.What payment methods are accepted for LTC2376IMS-18#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2376IMS-18#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2376IMS-18#PBF?
LTC2376IMS-18#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2376IMS-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 LTC2376IMS-18#PBF?
For technical support, including LTC2376IMS-18#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2376IMS-18#PBF requirements.
6.How does Aetrix verify that LTC2376IMS-18#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2376IMS-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 LTC2376IMS-18#PBF meets industry standards.
7.What is the process for return or replacement of LTC2376IMS-18#PBF?
All LTC2376IMS-18#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2376IMS-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 LTC2376IMS-18#PBF part is unused and in its original packaging.
Return procedure for LTC2376IMS-18#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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