My Inquiry
My Account
Analog Devices Inc. DC1783A-E
- Part No.:
- DC1783A-E
- Manufacturer:
- Analog Devices Inc.
- Package:
- Datasheet:
-
DC1783A-E.pdf
- Description:
- BOARD SAR ADC LTC2379-18
- Quantity:
- Payment:
- Shipping:
Inventory:2,676
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC2379-18 from Analog Devices (formerly Linear Technology) is an 18-bit, 1.6 Msps successive approximation register (SAR) analog-to-digital converter with ±2 LSB INL max, 101.2 dB SNR at 2 kHz, and digital gain compression (DGC) for single-supply amplifier interfacing. It operates from a 2.5 V analog supply and supports ±VREF fully differential inputs with VREF adjustable from 2.5 V to 5.1 V, targeting high-precision data acquisition in medical imaging and industrial process control.
For engineers reviewing the LTC2379-18 datasheet, LTC2379-18 pinout, LTC2379-18 application, or LTC2379-18 equivalent, key selection criteria include guaranteed 18-bit no-missing-codes performance, daisy-chain SPI interface compatibility, internal conversion clock, 125°C operation capability, and DGC-enabled 0.5 V to 4.5 V input range with 5 V reference.
Technical Context
The LTC2379-18 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 no pipeline delay and fixed 412 ns conversion time, enabling deterministic timing in real-time systems.
It features dual power domains: 2.5 V VDD for analog core and programmable 1.71–5.25 V OVDD for digital I/O, supporting 1.8 V/2.5 V/3.3 V/5 V logic levels. The REF/DGC pin selects between full ±VREF range (REF tied) or compressed 0.1×VREF to 0.9×VREF range (GND tied), directly enabling single-supply driver operation.
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 | 1.6 Msps - enables real-time capture of signals up to 34 MHz input bandwidth without aliasing. |
| SNR | 101.2 dB (typ, fIN = 2 kHz, VREF = 5 V) - corresponds to effective resolution of ~16.5 bits under typical conditions. |
| INL | ±2 LSB (max) - ensures monotonicity and linearity critical for closed-loop control and calibration applications. |
| Power Dissipation | 18 mW at 1.6 Msps - allows high-speed operation in thermally constrained portable instrumentation. |
| Digital Gain Compression | Enabled via REF/DGC = GND - maps zero-scale to 0.1×VREF and full-scale to 0.9×VREF, eliminating need for negative supply in front-end amplifiers. |
| Operating Temperature | –40°C to +125°C (H-grade) - qualified for harsh industrial and automotive under-hood environments. |
Pinout & Package
Available in 16-lead MSOP and 4 mm × 3 mm DFN packages, both with exposed thermal pad (GND). DFN package includes Pin 17 (exposed pad) soldered to PCB ground plane for optimal thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+, IN– | Differential analog input pair | Accepts ±VREF fully differential signal; input capacitance 45 pF in sample mode; requires low-impedance drive for settling. |
| REF | Reference voltage input | Defines full-scale range; accepts 2.5 V to 5.1 V; requires 47 µF X5R ceramic decoupling close to pin. |
| REF/DGC | Reference/Digital Gain Compression control | Tied to REF → standard ±VREF range; tied to GND → DGC mode (0.1–0.9×VREF range). |
| CNV | Convert trigger input | Rising-edge–initiated conversion; powers up ADC core; supports precise synchronous sampling. |
| BUSY | Conversion status indicator | Active-high open-drain output signaling conversion in progress; used for timing coordination or interrupt generation. |
| SDO, SCK, RDL/SDI, CHAIN | SPI-compatible serial interface | Supports 1.8–5 V logic; daisy-chain mode enabled when CHAIN = high; MSB-first 2's complement output. |
| VDD, OVDD, GND | Analog/digital power and ground | VDD = 2.375–2.625 V (analog core); OVDD = 1.71–5.25 V (I/O); separate bypassing required (10 µF + 0.1 µF). |
Key Features
| Feature | Design Value |
|---|---|
| No cycle latency | Delivers first valid conversion result immediately after CNV rising edge-enables deterministic real-time sampling without pipeline overhead. |
| Auto power-down | Reduces current to ≤0.9 µA between conversions, scaling power dissipation linearly with sample rate for battery-operated systems. |
| Digital Gain Compression (DGC) | Eliminates requirement for negative supply in driving amplifiers by digitally remapping input range to 0.5–4.5 V with 5 V reference. |
| Internal conversion clock | Removes need for external timing circuitry; simplifies layout and improves jitter immunity in noise-sensitive applications. |
| Guaranteed 125°C operation | H-grade variants specified over –40°C to +125°C with validated INL, SNR, and timing-suitable for extended-temperature industrial deployments. |
Applications
| Medical Imaging | High-Speed Data Acquisition |
|---|---|
Use Scenario: Digitizing CT/MRI sensor outputs requiring ultra-low noise and high dynamic range. IC Role / Device Role / Timing Role: Primary SAR ADC capturing analog detector signals at multi-Msps rates with minimal quantization error. Use Value: 101.2 dB SNR and ±2 LSB INL preserve subtle contrast gradients and reduce post-processing artifacts. |
Use Scenario: Real-time waveform capture in oscilloscopes and automated test equipment (ATE). IC Role / Device Role / Timing Role: High-throughput digitizer with deterministic 412 ns conversion time and no latency for trigger-aligned sampling. Use Value: 1.6 Msps throughput and daisy-chain SPI support enable synchronized multi-channel acquisition without FPGA buffering. |
| Portable Instrumentation | Industrial Process Control |
Use Scenario: Battery-powered handheld analyzers measuring voltage, current, or sensor outputs in field service. IC Role / Device Role / Timing Role: Low-power precision ADC with auto power-down and DGC to simplify front-end design. Use Value: 18 mW active power and ≤0.9 µA shutdown current extend battery life; DGC enables single 5.5 V supply for entire signal chain. |
Use Scenario: Monitoring analog sensor signals (e.g., pressure, temperature) in PLC I/O modules operating at elevated ambient temperatures. IC Role / Device Role / Timing Role: Industrial-grade ADC delivering stable performance from –40°C to +125°C with robust ESD-protected inputs. Use Value: Guaranteed 125°C operation and ±2 LSB INL ensure long-term accuracy in uncooled enclosures near motors or power electronics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7986 (Analog Devices) | 18-bit, 1 Msps, 100 dB SNR, 2.5 V supply, SPI interface, no DGC function. | Lacks digital gain compression; requires dual-supply or rail-to-rail amplifier for full input range utilization. | Select when lower throughput suffices and DGC is unnecessary; offers proven reliability in legacy industrial designs. |
| ADS8860 (Texas Instruments) | 16-bit, 1 Msps, 92.5 dB SNR, 2.5–5 V supply, SPI interface, no DGC, smaller 3 mm × 3 mm QFN package. | Lower resolution and SNR; lacks guaranteed 125°C operation and DGC; optimized for space-constrained, cost-sensitive systems. | Select when 16-bit resolution meets system requirements and board area is constrained; not suitable for 18-bit medical or metrology use cases. |
Compared with AD7986 and ADS8860, the LTC2379-18 uniquely combines 18-bit no-missing-codes assurance, 101.2 dB SNR, DGC for simplified analog front-end design, and H-grade 125°C qualification-making it the only option among the three capable of maintaining full specification in thermally demanding, high-fidelity measurement systems.
Availability
LTC2379-18 is available at Aetrix Electronics and suitable for medical imaging systems, high-speed data acquisition equipment, and industrial process control modules requiring stable component supply with guaranteed long-term availability and extended temperature support.
Supply support for LTC2379-18 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, acquired Linear Technology in 2017 to strengthen its precision converter portfolio.
The LTC2379-18 belongs to ADI's high-speed precision SAR ADC product line, designed specifically for applications demanding simultaneous high resolution, high throughput, low power, and robust operation across extreme temperatures.
FAQ
What is the maximum sampling rate of the LTC2379-18?
The LTC2379-18 achieves a maximum sampling rate of 1.6 Msps with no cycle latency. This is guaranteed across the full operating temperature range for all grade variants (C, I, and H), and is enabled by its internal oscillator and optimized CDAC architecture. At this rate, the LTC2379-18 consumes 18 mW and maintains 101.2 dB SNR with 2 kHz input tone.
How does Digital Gain Compression (DGC) work in the LTC2379-18?
In the LTC2379-18, DGC is activated by grounding the REF/DGC pin. This causes the ADC to digitally remap the zero-scale code from 0 V to 0.1 × VREF and full-scale code from VREF to 0.9 × VREF. With a 5 V reference, the effective input range becomes 0.5 V to 4.5 V, allowing the driving amplifier to operate from a single 5.5 V supply without negative rail-preserving full 18-bit resolution.
Which package options are available for the LTC2379-18?
The LTC2379-18 is offered in two RoHS-compliant packages: 16-lead plastic MSOP (3 mm × 4.9 mm) and 16-lead (4 mm × 3 mm) plastic DFN with exposed thermal pad. Both packages support the full –40°C to +125°C operating range in H-grade variants. The DFN variant includes Pin 17 (exposed pad) that must be soldered to PCB ground for thermal and electrical integrity.
Does the LTC2379-18 require an external clock source?
No, the LTC2379-18 does not require an external clock source. It integrates an internal oscillator that sets the conversion timing, resulting in a fixed 412 ns conversion time. This eliminates external clock routing, reduces jitter sensitivity, and simplifies system-level timing design-especially beneficial in noise-prone or space-constrained layouts.
What is the guaranteed integral nonlinearity (INL) specification for the LTC2379-18?
The LTC2379-18 guarantees ±2 LSB maximum integral nonlinearity over the full operating temperature range for all grade variants. This specification is tested and ensured across –40°C to +125°C (H-grade), confirming monotonic behavior and predictable transfer function accuracy essential for closed-loop control, calibration, and metrology applications where end-point linearity is critical.
DC1783A-E 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):
- 1.6M
- Data Interface:
- SPI
- Input Range:
- ±VREF
- Power (Typ) @ Conditions:
- 18mW @ 1.6MSPS
- Utilized IC / Part:
- LTC2379-18
- Contents:
- Board(s)
DC1783A-E FAQ
1.How can I place an order for DC1783A-E through Aetrix?
Please submit a Request for Quotation (RFQ) for DC1783A-E 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-E reliable?
The price and inventory of DC1783A-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DC1783A-E is usually 5 days.
3.What payment methods are accepted for DC1783A-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DC1783A-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DC1783A-E?
DC1783A-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DC1783A-E 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-E?
For technical support, including DC1783A-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DC1783A-E requirements.
6.How does Aetrix verify that DC1783A-E is sourced from the original manufacturer or authorized distributors?
All DC1783A-E 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-E meets industry standards.
7.What is the process for return or replacement of DC1783A-E?
All DC1783A-E units undergo pre-shipment inspection (PSI). If there is an issue with DC1783A-E, 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-E part is unused and in its original packaging.
Return procedure for DC1783A-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DC1783A-E Tags
-
1083
Adafruit Industries LLC
-
1085
Adafruit Industries LLC
-
ADS7038Q1EVM-PDK
Texas Instruments
-
ADS8688EVM-PDK
Texas Instruments
-
EVAL-AD7606C18FMCZ
Analog Devices Inc.
-
ADS1232REF
Texas Instruments
-
EVAL-AD4134FMCZ
Analog Devices Inc.
-
EVAL-AD7768FMCZ
Analog Devices Inc.
-
ADC128S102EVM
Texas Instruments
-
ADS124S08EVM
Texas Instruments
-
ADC6140EVM-PDK
Texas Instruments
-
ADS7066EVM-PDK
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
