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Analog Devices Inc. DC1783A-H
- Part No.:
- DC1783A-H
- Manufacturer:
- Analog Devices Inc.
- Package:
- Datasheet:
-
DC1783A-H.pdf
- Description:
- BOARD SAR ADC LTC2376-18
- Quantity:
- Payment:
- Shipping:
Inventory:4,366
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Product details
Overview
LTC2376-18 from Analog Devices (acquired 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 3.4mW power consumption at full speed. It features fully differential ±VREF input (2.5V–5.1V reference), SPI-compatible serial interface with daisy-chain mode, and digital gain compression (DGC) for single-supply amplifier drive - used in high-speed data acquisition and medical imaging systems.
For engineers reviewing the LTC2376-18 datasheet, LTC2376-18 pinout, LTC2376-18 application, or LTC2376-18 equivalent, key selection criteria include guaranteed 18-bit no-missing-codes operation, internal conversion clock eliminating external timing constraints, DGC-enabled 0.5V–4.5V input range with 5V reference, and H-grade support up to 125°C.
Technical Context
The LTC2376-18 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 pipeline delay and cycle latency.
Its analog front-end supports ±VREF fully differential inputs with 34MHz –3dB bandwidth, 45pF sampling capacitance, and 40Ω switch RON. Digital gain compression (DGC) is controlled via the REF/DGC pin, enabling zero-scale mapping to 0.1·VREF and full-scale to 0.9·VREF without hardware modification.
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 | 250ksps - enables real-time capture of signals up to 125kHz Nyquist bandwidth. |
| SNR | 102dB at fIN = 2kHz, VREF = 5V - supports >16.5 effective number of bits (ENOB) in precision measurement. |
| INL | ±1.75LSB max - ensures monotonicity and linearity critical for closed-loop control and calibration systems. |
| Power @ 250ksps | 3.4mW total (1.36mA VDD + 0.9mA OVDD + 0.2mA IREF) - enables battery-powered portable instrumentation. |
| Digital Gain Compression | Enabled by grounding REF/DGC - shifts input range to 0.1·VREF–0.9·VREF, allowing single 5.5V supply for driving amplifiers. |
| Operating Temperature | H-grade: –40°C to +125°C - qualified for industrial process control and downhole sensing environments. |
Pinout & Package
Available in 16-lead MSOP and 4mm × 3mm DFN packages; both expose GND on Pin 17 (DFN) or Pin 10/16 (MSOP). DFN package requires soldering of exposed pad to PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+, IN– | Differential analog inputs | Accept ±VREF fully differential signal; 45pF sampling capacitance and 40Ω RON define settling requirements. |
| REF | Reference voltage input | 2.5V–5.1V range sets full-scale; decoupled with 47µF X5R ceramic capacitor for low-noise operation. |
| REF/DGC | Digital gain compression control | Ground to enable DGC (0.1–0.9·VREF range); tie to REF to disable and restore ±VREF 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 ongoing conversion; used for timing synchronization or interrupt generation. |
| SDO, SCK, RDL/SDI | SPI-compatible serial interface | 2's complement 18-bit output; supports 1.8V–5V logic levels and daisy-chain mode via CHAIN pin. |
| VDD, OVDD | Analog and digital supplies | VDD = 2.5V ±62.5mV; OVDD = 1.71V–5.25V - independent I/O voltage allows interfacing with mixed-voltage host systems. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay / zero cycle latency | Enables deterministic real-time sampling for time-critical control loops without output buffering or FIFO management. |
| Internal conversion clock | Removes need for external timing circuitry or master clock distribution - simplifies PCB layout and reduces BOM count. |
| Auto power-down between conversions | Reduces current to 0.9µA (H-grade) during idle periods - extends battery life in intermittent-sampling applications. |
| 1.8V–5V I/O voltage support | Allows direct connection to FPGA, MCU, or DSP operating at 1.8V, 2.5V, 3.3V, or 5V logic without level shifters. |
| Guaranteed operation to 125°C | Validated performance over full H-grade temperature range - suitable for under-hood automotive or industrial motor control. |
Applications
| Medical Imaging Signal Chain | High-Speed Industrial Data Acquisition |
|---|---|
Use Scenario: Digitizing low-noise, wide-dynamic-range signals from ultrasound transducer arrays or MRI gradient coils. IC Role / Device Role / Timing Role: Primary SAR ADC capturing 18-bit samples at 250ksps with <1.75LSB INL to preserve image fidelity and contrast resolution. Use Value: 102dB SNR enables detection of weak echo signals buried in noise; DGC simplifies analog front-end design using single-supply op-amps. | Use Scenario: Real-time monitoring of vibration, temperature, and pressure in rotating machinery with edge-based FFT analysis. IC Role / Device Role / Timing Role: High-accuracy ADC in predictive maintenance sensor node, synchronized via BUSY signal to FPGA processing pipeline. Use Value: No missing codes and monotonic transfer function ensure reliable amplitude tracking; 125°C rating supports deployment near motors or bearings. |
| Portable Precision Instrumentation | Automated Test Equipment (ATE) |
Use Scenario: Handheld multimeter or portable oscilloscope requiring high-resolution DC and AC measurements with low power draw. IC Role / Device Role / Timing Role: Core ADC delivering 18-bit resolution and 102dB SNR while consuming only 3.4mW at full rate and 3.4µW at 250sps. Use Value: Auto power-down and low standby current extend battery runtime; ±VREF input flexibility supports multiple reference configurations. | Use Scenario: Channelized ATE system performing parallel parametric testing of analog ICs with tight linearity and noise requirements. IC Role / Device Role / Timing Role: Precision digitizer in multi-channel test head, leveraging daisy-chain SPI to minimize interconnect count and routing complexity. Use Value: Guaranteed 18-bit no-missing-codes operation ensures traceable metrology compliance; 250ksps throughput supports fast test cycles. |
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 |
|---|---|---|---|
| AD7986 (Analog Devices) | 18-bit, 1MSPS, 10.5mW; uses external clock; no DGC; 100dB SNR | Higher speed but higher power and no integrated DGC - requires dual-supply driver amplifiers | Select when >250ksps sampling is required and system can accommodate higher power and external timing. |
| ADS8860 (Texas Instruments) | 16-bit, 1MSPS, 2.5mW; SPI interface; no DGC; 92.5dB SNR | Lower resolution and SNR; lacks DGC and 125°C rating - limited to commercial-temperature instrumentation | Select for cost-sensitive, lower-resolution applications where 16-bit accuracy suffices and extended temperature is not needed. |
Compared with AD7986 and ADS8860, the LTC2376-18 uniquely balances 18-bit integrity, ultra-low 3.4mW power, built-in DGC for simplified analog drive, and guaranteed 125°C operation - making it optimal for portable, high-fidelity, thermally demanding measurement systems.
Availability
LTC2376-18 is available at Aetrix Electronics and suitable for medical imaging, industrial process control, and portable instrumentation requiring stable component supply, long-term lifecycle support, and guaranteed H-grade temperature performance.
Supply support for LTC2376-18 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 high resolution, low power, and robust operation in thermally challenging environments - including medical, industrial, and aerospace systems.
FAQ
What is the maximum sampling rate of the LTC2376-18?
The LTC2376-18 achieves a maximum sampling rate of 250ksps with no pipeline delay or cycle latency. This is enabled by its internal oscillator and successive approximation architecture, ensuring deterministic timing for time-critical applications such as closed-loop control and real-time signal analysis. The LTC2376-18 maintains full 18-bit performance and ±1.75LSB INL across this entire rate.
How does digital gain compression (DGC) work in the LTC2376-18?
Digital gain compression in the LTC2376-18 is activated by grounding the REF/DGC pin, which redefines the full-scale input range from ±VREF to 0.1·VREF–0.9·VREF. For a 5V reference, this yields a 0.5V–4.5V differential input window, enabling single-supply amplifier operation (e.g., LT6350 from +5.5V). The LTC2376-18 preserves full 18-bit resolution and linearity while simplifying analog front-end design.
Which package options are available for the LTC2376-18?
The LTC2376-18 is offered in two RoHS-compliant packages: 16-lead plastic MSOP (3mm × 4.9mm) and 16-lead 4mm × 3mm plastic DFN with exposed thermal pad. Both support H-grade (–40°C to +125°C) operation. The DFN variant requires soldering of Pin 17 (exposed pad) to the PCB ground plane for optimal thermal dissipation and noise performance.
Does the LTC2376-18 require an external clock source?
No, the LTC2376-18 integrates an internal conversion clock, eliminating the need for an external timing source. Its fixed conversion time of 1.9–3µs is self-contained, reducing system complexity and PCB area. External clocks are not supported - timing is fully autonomous, and the BUSY signal provides precise conversion completion indication for host synchronization.
What is the guaranteed operating temperature range for the H-grade LTC2376-18?
The H-grade LTC2376-18 is guaranteed to operate from –40°C to +125°C across all specified electrical parameters, including ±1.75LSB INL max, 102dB SNR, and 250ksps throughput. This qualification covers dynamic and dc specifications per the datasheet's "l" notation, making the LTC2376-18 suitable for under-hood automotive, downhole oil/gas, and industrial motor control applications.
DC1783A-H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Packaging:
- Box
- Product Status:
- Active
- Number of A/D Converters:
- 1
- Number of Bits:
- 18
- Sampling Rate (Per Second):
- 250k
- Data Interface:
- SPI
- Input Range:
- ±VREF
- Power (Typ) @ Conditions:
- 3.4mW @ 250kSPS
- Utilized IC / Part:
- LTC2376-18
- Contents:
- Board(s)
DC1783A-H FAQ
1.How can I place an order for DC1783A-H through Aetrix?
Please submit a Request for Quotation (RFQ) for DC1783A-H 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 DC1783A-H reliable?
The price and inventory of DC1783A-H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DC1783A-H is usually 5 days.
3.What payment methods are accepted for DC1783A-H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DC1783A-H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DC1783A-H?
DC1783A-H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DC1783A-H 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 DC1783A-H?
For technical support, including DC1783A-H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DC1783A-H requirements.
6.How does Aetrix verify that DC1783A-H is sourced from the original manufacturer or authorized distributors?
All DC1783A-H 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 DC1783A-H meets industry standards.
7.What is the process for return or replacement of DC1783A-H?
All DC1783A-H units undergo pre-shipment inspection (PSI). If there is an issue with DC1783A-H, 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 DC1783A-H part is unused and in its original packaging.
Return procedure for DC1783A-H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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