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Analog Devices Inc. LTC2376IDE-20#PBF
- Part No.:
- LTC2376IDE-20#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LTC2376IDE-20#PBF.pdf
- Description:
- IC ADC 20BIT SAR 16DFN
- Quantity:
- Payment:
- Shipping:
Inventory:495
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Product details
Overview
LTC2376IDE-20#PBF from Analog Devices (formerly Linear Technology) is a 20-bit, 250ksps successive approximation register (SAR) analog-to-digital converter with ±0.5ppm typical INL, 104dB SNR at 2kHz, and digital gain compression (DGC) for single-supply amplifier interfacing. It operates from a 2.5V analog supply and supports ±VREF fully differential inputs with VREF adjustable from 2.5V to 5.1V, targeting high-precision data acquisition in portable instrumentation and medical imaging systems.
For engineers reviewing the LTC2376IDE-20#PBF datasheet, LTC2376IDE-20#PBF pinout, LTC2376IDE-20#PBF application, or LTC2376IDE-20#PBF equivalent, key selection considerations include guaranteed 20-bit no-missing-codes performance, daisy-chain SPI interface compatibility across 1.8V–5V logic levels, internal conversion clock, and –40°C to +85°C industrial temperature rating in the 4mm × 3mm DFN package.
Technical Context
The LTC2376IDE-20#PBF implements a charge-redistribution SAR architecture with a 20-bit CDAC and differential comparator, achieving zero-cycle latency and no pipeline delay. Its internal oscillator fixes conversion time at 2–3µs, eliminating external timing constraints while enabling precise synchronization via the CNV input.
Digital Gain Compression (DGC) remaps the ADC's transfer function so zero-scale shifts from 0V to 0.1·VREF and full-scale from VREF to 0.9·VREF-enabling rail-to-rail input swing (e.g., 0.5V–4.5V at 5V reference) without requiring a negative supply for the driving amplifier. The device supports both normal and daisy-chain SPI modes via the CHAIN pin, with SDO output in 2's complement format.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 20-bit - delivers 1 ppm LSB step size (9.5 µV at 5V reference), enabling sub-microvolt measurement resolution. |
| Sampling Rate | 250 ksps - supports real-time capture of signals up to 34 MHz bandwidth with <1 µs transient response. |
| INL | ±0.5 ppm typical - ensures monotonicity and <1 LSB error across full scale, critical for calibration-sensitive applications. |
| SNR | 104 dB typical at fIN = 2 kHz - achieves >17 effective bits (ENOB ≈ 17.3) with low noise floor for high-fidelity signal digitization. |
| Power Consumption | 5.3 mW at 250 ksps - enables battery-operated designs with thermal budget under 500 mW (θJA = 40°C/W). |
| Reference Range | 2.5 V to 5.1 V - allows flexible system-level scaling; supports precision external references or internal buffered sources. |
| Operating Temperature | –40°C to +85°C - qualified for industrial and medical environments without derating. |
Pinout & Package
Package: 16-lead (4 mm × 3 mm) plastic DFN with exposed pad (Pin 17 = GND). Requires soldering of exposed pad to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (CHAIN) | Chain mode selector | High enables daisy-chain SPI; low configures RDL/SDI as bus-enable control - eliminates need for external multiplexing in multi-ADC systems. |
| Pin 2 (VDD) | Analog supply | 2.5 V ±62.5 mV supply; bypassed with 10 µF ceramic capacitor - powers core ADC and internal reference buffer. |
| Pins 3, 6, 10, 16 (GND) | Ground return | Four dedicated ground pins minimize ground bounce and improve PSRR; exposed pad (Pin 17) must be connected to PCB ground. |
| Pins 4, 5 (IN+, IN–) | Differential analog input | Fully differential ±VREF input with 45 pF sampling capacitance - requires matched drive impedance and common-mode voltage at VREF/2 ±0.1 V. |
| Pin 7 (REF) | Reference input | 2.5 V–5.1 V external reference; decoupled with 47 µF X7R ceramic capacitor - sets full-scale range and LSB size. |
| Pin 8 (REF/DGC) | DGC enable/control | GND enables digital gain compression (0.5V–4.5V input range at 5V ref); tied to REF disables DGC for standard ±VREF operation. |
| Pin 9 (CNV) | Convert trigger | Rising-edge–initiated conversion start; powers up ADC and synchronizes sampling - supports deterministic timing in time-critical systems. |
| Pin 11 (BUSY) | Conversion status | Active-high open-drain indicator; asserts at CNV↑ and deasserts after conversion completes - enables interrupt-driven firmware polling. |
| Pin 12 (RDL/SDI) | Serial interface control/data | In normal mode: bus-enable input; in chain mode: serial data input - simplifies multi-device SPI topology without additional GPIO. |
| Pin 13 (SCK) | Serial clock | Up to 100 MHz SPI clock (10 ns period); rising-edge–sampled - compatible with FPGA, MCU, and DSP interfaces across 1.8V–5V logic families. |
| Pin 14 (SDO) | Serial data output | 20-bit 2's complement result shifted MSB-first on SCK rising edge - supports daisy-chain readout of multiple LTC2376 devices. |
| Pin 15 (OVDD) | I/O supply | 1.71 V–5.25 V digital interface supply - independently set to match host controller voltage (e.g., 1.8V for low-power MCUs). |
Key Features
| Feature | Design Value |
|---|---|
| Digital Gain Compression (DGC) | Eliminates need for negative supply on input driver amplifiers by digitally compressing full-scale range to 10%–90% of VREF, preserving 20-bit resolution while simplifying power architecture. |
| No missing codes at 20 bits | Guaranteed monotonic transfer function over full temperature range - essential for closed-loop control and metrology where code dropout causes system instability. |
| Daisy-chain SPI interface | Enables cascaded readout of multiple LTC2376IDE-20#PBF devices using single SCK/SDO lines - reduces PCB routing complexity and host GPIO count in multi-channel systems. |
| Internal conversion clock | Removes dependency on external clock source or PLL - simplifies layout, improves jitter immunity, and ensures consistent 250 ksps throughput regardless of host timing stability. |
| Auto power-down between conversions | Reduces average current to 5.3 µW at 250 sps - extends battery life in intermittent-sampling applications without firmware intervention. |
Applications
| Medical Imaging Signal Chain | Portable Precision Data Logger |
|---|---|
|
Use Scenario: Digitizing low-amplitude, high-frequency ultrasound echo signals in handheld diagnostic equipment. IC Role / Device Role / Timing Role: Primary 20-bit SAR ADC capturing baseband I/Q channel data with 104 dB SNR and <1 µs settling to preserve spatial resolution. Use Value: Enables detection of sub-millimeter tissue structures through ultra-low-noise digitization, supported by DGC to simplify front-end amplifier biasing from single 5.5 V supply. |
Use Scenario: High-accuracy environmental monitoring (temperature, pressure, gas concentration) in field-deployable battery-powered units. IC Role / Device Role / Timing Role: Low-power, high-linearity ADC acquiring sensor outputs at 250 ksps burst mode or 250 sps continuous logging. Use Value: Delivers 20-bit no-missing-codes accuracy with only 5.3 mW active power and 5.3 µW standby - extending operational life on coin-cell or Li-ion batteries. |
| Industrial Process Control Loop | Automated Test Equipment (ATE) |
|
Use Scenario: Closed-loop feedback sensing in servo drives and PLC analog I/O modules requiring traceable calibration and long-term stability. IC Role / Device Role / Timing Role: Precision ADC providing bipolar zero-scale and full-scale error drift ≤±7 ppb/°C and ≤±0.05 ppm/°C for factory-calibrated systems. Use Value: Maintains <±0.5 ppm INL over –40°C to +85°C, reducing recalibration frequency and enabling compliance with IEC 61000-4-30 Class A power quality standards. |
Use Scenario: High-speed parametric testing of semiconductor devices requiring synchronized multi-channel sampling and fast data streaming. IC Role / Device Role / Timing Role: 250 ksps SAR ADC with zero-cycle latency and daisy-chain capability for parallel acquisition across 8+ channels. Use Value: Eliminates pipeline delay-induced timing skew; SPI daisy-chain reduces test head cabling and controller resource usage versus parallel bus architectures. |
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 |
|---|---|---|---|
| AD7985BRUZ | 18-bit, 2.5 MSPS, 3.3 V supply only, no DGC, 91 dB SNR | Higher speed but lower resolution and SNR; lacks DGC and wide reference range | Select when throughput >1 MSPS is required and 18-bit ENOB suffices; not suitable for sub-ppm linearity or single-supply amplifier interfacing. |
| LTC2378-20#PBF | Same 20-bit/250ksps spec, but 16-lead MSOP package, 0°C–70°C grade | Identical electrical performance; differs only in package and temp grade | Choose LTC2378-20#PBF only if MSOP footprint is preferred and industrial temperature range is not required. |
Compared with AD7985BRUZ and LTC2378-20#PBF, the LTC2376IDE-20#PBF uniquely combines 20-bit no-missing-codes assurance, ±0.5 ppm INL, DGC functionality, and –40°C to +85°C operation in a thermally enhanced DFN package - making it optimal for portable, calibrated, and thermally demanding instrumentation.
Availability
LTC2376IDE-20#PBF is available at Aetrix Electronics and suitable for medical imaging signal chains, portable precision data loggers, and industrial process control systems requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.
Supply support for LTC2376IDE-20#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 LTC2376IDE-20#PBF belongs to ADI's precision SAR ADC product line, engineered for applications demanding ultra-low distortion, guaranteed linearity, and low-power operation in compact form factors - especially where metrology-grade accuracy meets portable or harsh-environment deployment.
FAQ
What is the operating temperature range of the LTC2376IDE-20#PBF?
The LTC2376IDE-20#PBF is rated for operation from –40°C to +85°C, meeting industrial temperature requirements. This specification is guaranteed across all electrical parameters including INL (±2 ppm max), SNR (≥101 dB), and power consumption (5.3 mW typ at 250 ksps), as confirmed in the Absolute Maximum Ratings and Dynamic Accuracy tables of the official datasheet.
Does the LTC2376IDE-20#PBF require an external clock source?
No, the LTC2376IDE-20#PBF features an internal oscillator that sets conversion timing, eliminating the need for an external clock. The typical conversion time is 2–3 µs, and the device achieves exact 250 ksps throughput without external timing components - simplifying design and improving jitter immunity compared to externally clocked ADCs.
How does Digital Gain Compression (DGC) work in the LTC2376IDE-20#PBF?
In the LTC2376IDE-20#PBF, DGC is enabled by grounding the REF/DGC pin (Pin 8). This remaps the ADC's transfer function so zero-scale corresponds to 0.1·VREF and full-scale to 0.9·VREF - yielding a usable input range of 0.5 V to 4.5 V at 5 V reference. This allows the input driver amplifier to operate from a single 5.5 V supply without negative rails, while preserving full 20-bit resolution.
What package type is used for the LTC2376IDE-20#PBF?
The LTC2376IDE-20#PBF uses a 16-lead plastic DFN package measuring 4 mm × 3 mm with an exposed thermal pad (Pin 17 = GND). This package offers superior thermal performance (θJA = 40°C/W) versus the MSOP variant and requires soldering the exposed pad directly to the PCB ground plane for optimal electrical and thermal integrity.
Can the LTC2376IDE-20#PBF interface with 1.8 V logic systems?
Yes, the LTC2376IDE-20#PBF supports 1.8 V, 2.5 V, 3.3 V, and 5 V logic levels via its OVDD supply (Pin 15). When OVDD = 1.8 V, all digital inputs (CNV, SCK, CHAIN, RDL/SDI) accept 0.2·OVDD to 0.8·OVDD thresholds, and SDO outputs are compatible with 1.8 V CMOS receivers - enabling direct interfacing with ultra-low-power microcontrollers and FPGAs.
LTC2376IDE-20#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 20
- 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-DFN (4x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2376IDE-20#PBF FAQ
1.How can I place an order for LTC2376IDE-20#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2376IDE-20#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 LTC2376IDE-20#PBF reliable?
The price and inventory of LTC2376IDE-20#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2376IDE-20#PBF is usually 5 days.
3.What payment methods are accepted for LTC2376IDE-20#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2376IDE-20#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2376IDE-20#PBF?
LTC2376IDE-20#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2376IDE-20#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 LTC2376IDE-20#PBF?
For technical support, including LTC2376IDE-20#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2376IDE-20#PBF requirements.
6.How does Aetrix verify that LTC2376IDE-20#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2376IDE-20#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 LTC2376IDE-20#PBF meets industry standards.
7.What is the process for return or replacement of LTC2376IDE-20#PBF?
All LTC2376IDE-20#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2376IDE-20#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 LTC2376IDE-20#PBF part is unused and in its original packaging.
Return procedure for LTC2376IDE-20#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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