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Analog Devices Inc. LTC1418IG#TRPBF
- Part No.:
- LTC1418IG#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC1418IG#TRPBF.pdf
- Description:
- IC ADC 14BIT SAR 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,000
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Product details
Overview
LTC1418IG#TRPBF from Analog Devices (formerly Linear Technology) is a low-power, 14-bit, 200ksps successive-approximation ADC with selectable parallel or SPI/MICROWIRE-compatible serial output. It operates from single 5V or ±5V supplies, integrates a 2.5V reference and sample-and-hold, and delivers ±1.25LSB INL, 81.5dB S/(N+D), and 15mW typical power dissipation in remote data acquisition systems.
For engineers reviewing the LTC1418IG#TRPBF datasheet, LTC1418IG#TRPBF pinout, LTC1418IG#TRPBF application, or LTC1418IG#TRPBF equivalent, key selection criteria include its industrial temperature range (–40°C to +85°C), dual-supply bipolar/unipolar input flexibility (±2.048V / 0V–4.096V), shutdown modes (Nap/Sleep), and 28-lead SSOP package compatibility with high-density PCB layouts.
Technical Context
The LTC1418IG#TRPBF employs a differential capacitive DAC and successive approximation register (SAR) architecture with internal timing control, enabling precise 14-bit conversion without external clock or reference components. Its analog front-end features high-impedance differential inputs, 0.3–1µs acquisition time, and >80dB common-mode rejection up to 100kHz.
Digital interface logic supports both parallel 14-bit output (D13–D0) and serial mode via configurable pins (SER/PAR, EXT/INT, SCLK, DOUT, CLKOUT), with programmable conversion start (CONVST), chip select (CS), read (RD), and busy (BUSY) signaling for seamless microprocessor or DSP integration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with guaranteed no missing codes over temperature - ensures monotonicity and full dynamic range utilization in closed-loop control. |
| Sampling Rate | 200ksps maximum - supports real-time signal capture up to 100kHz Nyquist bandwidth for audio, telecom, and sensor conditioning. |
| INL / DNL | ±1.25LSB / ±1LSB max - enables accurate DC measurement and linearity-critical applications like medical instrumentation calibration. |
| S/(N + D) | 81.5dB at 97.5kHz - provides >13.2 effective bits for high-fidelity digitization of low-noise analog sources. |
| Power Dissipation | 15mW typical (unipolar), 26.5mW typical (bipolar) - allows battery operation in portable test equipment with minimal thermal impact. |
| Supply Range | Single 5V (4.75–5.25V) or ±5V (±4.75–±5.25V) - simplifies system power architecture by eliminating need for precision voltage regulators. |
| Reference | Internal 2.500V ±20ppm/°C (industrial) - eliminates external reference IC, reducing BOM count and layout area while maintaining stable scaling. |
Pinout & Package
Package: 28-lead plastic SSOP (G package), 5.6mm × 10.2mm body, 0.65mm lead pitch, RoHS-compliant lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN+, AIN– | Differential analog input | Accepts ±2.048V bipolar or 0–4.096V unipolar signals; high-impedance input draws ≤±1µA leakage, enabling direct connection to precision op-amps or isolated signal chains. |
| VREF | 2.5V reference output | Provides stable internal reference; requires 1µF bypass to AGND-critical for minimizing code-dependent errors in ratiometric measurements. |
| REFCOMP | 4.096V reference bypass | Stabilizes internal 4.096V reference node; must be bypassed with 10µF tantalum + 0.1µF ceramic to suppress switching noise affecting LSB accuracy. |
| D13–D0 | Parallel data outputs | Three-state, MSB-first 14-bit bus; active when CS=LOW and RD=LOW-enables direct connection to 16-bit microcontroller data buses without level-shifting. |
| SER/PAR | Output format selector | High = serial mode (SPI/MICROWIRE); Low = parallel mode-allows runtime reconfiguration without hardware change. |
| EXT/INT (D0) | Conversion clock source select | Low = internal clock (200ksps fixed); High = external clock on EXTCLKIN (up to 4.5MHz)-supports variable sampling rates for adaptive signal processing. |
| CONVST | Conversion start trigger | Falling-edge sensitive; initiates SAR cycle and resets register-must meet 40ns setup to CS↓ and avoid mid-conversion retriggering to prevent code corruption. |
| BUSY | Conversion status indicator | Active-low open-drain output; goes low at CONVST↓ and high 3.7–5µs later-provides hardware handshaking for deterministic data capture timing. |
| SHDN, CS | Power management controls | SHDN=LOW + CS=LOW → Nap mode (2µA IDD); SHDN=LOW + CS=HIGH → Sleep mode (0.1µA IDD)-enables µA-level standby in always-on monitoring nodes. |
Key Features
| Feature | Design Value |
|---|---|
| Selectable parallel/serial I/O | Reduces interface complexity: parallel mode enables high-speed burst reads; serial mode minimizes MCU pin count and PCB routing in space-constrained designs. |
| Integrated 2.5V reference | Eliminates external reference IC and associated passive components-reducing total solution size by ≥30% and improving long-term drift stability (±20ppm/°C industrial grade). |
| Dual-supply operation | Supports both unipolar (5V only) and bipolar (±5V) configurations in same footprint-enables reuse across sensor types (e.g., strain gauge vs thermocouple) without board redesign. |
| Nap/Sleep shutdown modes | Extends battery life: Nap mode (2µA) allows sub-1µs wake-up for event-triggered sampling; Sleep mode (0.1µA) suits multi-day environmental logging with infrequent wake-ups. |
| Differential high-Z analog input | Enables rejection of common-mode noise in noisy industrial environments (e.g., motor drives); input capacitance of 25pF (sample) / 5pF (hold) ensures fast settling with low-output-impedance drivers. |
Applications
| Remote Data Acquisition | Battery-Operated Systems |
|---|---|
Use Scenario: Distributed environmental sensors (temperature, humidity, pressure) transmitting data over LoRaWAN or NB-IoT. IC Role / Device Role / Timing Role: Precision analog front-end digitizing conditioned sensor outputs at 10–100ksps with minimal power overhead. Use Value: 15mW typical power and Nap/Sleep modes enable >1-year operation on two AA cells; ±1.25LSB INL ensures calibrated accuracy across –40°C to +85°C field deployment. | Use Scenario: Portable handheld test equipment (e.g., multimeter, oscilloscope probe) requiring high-resolution waveform capture. IC Role / Device Role / Timing Role: Main ADC capturing analog signals with 200ksps throughput and 14-bit resolution for real-time display and storage. Use Value: Single 5V supply simplifies battery regulation; integrated reference removes calibration drift; 28-SSOP footprint fits compact enclosures without sacrificing performance. |
| Digital Signal Processing | Medical Instrumentation |
Use Scenario: Real-time digital filtering and spectral analysis in embedded DSP platforms (e.g., FFT-based vibration analysis). IC Role / Device Role / Timing Role: High-fidelity analog-to-digital converter feeding FPGA or DSP with low-latency, deterministic 200ksps data stream. Use Value: 81.5dB S/(N+D) and –94dB THD preserve signal integrity for accurate frequency-domain computation; BUSY signal enables precise DMA triggering. | Use Scenario: Patient monitoring devices (ECG, EEG) requiring low-noise, high-linearity digitization of microvolt-level bio-signals. IC Role / Device Role / Timing Role: Primary ADC in analog front-end, converting differential electrode signals with galvanic isolation and anti-aliasing filtering. Use Value: Differential input rejects 50/60Hz mains interference; ±1LSB DNL prevents code ambiguities in diagnostic waveform interpretation; industrial temp grade ensures reliability in clinical environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 14-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8325IPW | 16-bit resolution, 100ksps max, SPI-only interface, no internal reference - requires external 2.5V ref and level-shifting for 5V systems. | Better resolution but lower speed; suited for precision DC measurements (e.g., weigh scales) where throughput <100ksps suffices. | Choose ADS8325IPW when ENOB >14.5 bits is mandatory and system can accommodate external reference and slower sampling. |
| MAX1162BCAP+ | 14-bit, 250ksps, internal reference, SPI interface only, 20-pin TSSOP - lacks parallel output and bipolar supply support. | Higher speed but limited to unipolar 5V operation; smaller package reduces PCB area but restricts analog input flexibility. | Choose MAX1162BCAP+ when board space is critical and system uses only unipolar signals with SPI-native MCU interface. |
Compared with LTC1418IG#TRPBF, ADS8325IPW trades speed and interface flexibility for higher resolution, while MAX1162BCAP+ offers faster sampling in a smaller package but sacrifices bipolar operation and parallel I/O-making LTC1418IG#TRPBF optimal for industrial systems needing robust dual-supply analog interfacing and dual-mode digital connectivity.
Availability
LTC1418IG#TRPBF is available at Aetrix Electronics and suitable for remote data acquisition, battery-operated instrumentation, and medical device design requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC1418IG#TRPBF 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 LTC1418IG#TRPBF belongs to ADI's legacy Linear Technology precision data converter family, designed specifically for low-power, high-accuracy measurement systems operating in harsh industrial and portable environments.
FAQ
What is the operating temperature range for the LTC1418IG#TRPBF?
The LTC1418IG#TRPBF is rated for industrial temperature operation from –40°C to +85°C, as confirmed by its "I" grade suffix and validated across all AC/DC specifications including INL, DNL, and S/(N+D) in the official datasheet. This makes LTC1418IG#TRPBF suitable for deployment in outdoor sensor nodes, factory automation controllers, and medical devices requiring extended thermal reliability.
Does the LTC1418IG#TRPBF require an external reference voltage?
No, the LTC1418IG#TRPBF includes a precision 2.500V internal reference with ±20ppm/°C tempco (industrial grade) and 0.05 LSB/V line regulation. While it supports external reference operation via the VREF pin, using the internal reference eliminates BOM cost and layout area-confirmed by the "Internal Reference" column in the Full-Scale Error specification table for LTC1418IG#TRPBF.
How does the power shutdown functionality work on the LTC1418IG#TRPBF?
The LTC1418IG#TRPBF implements two distinct low-power states: Nap mode (SHDN=LOW, CS=LOW) draws 2µA and enables sub-1µs wake-up; Sleep mode (SHDN=LOW, CS=HIGH) draws 0.1µA with longer wake-up latency. Both modes are explicitly documented in the Power Requirements table and Shutdown section of the LTC1418IG#TRPBF datasheet, supporting energy-sensitive applications like wireless sensor networks.
Can the LTC1418IG#TRPBF operate with a single 5V supply?
Yes, the LTC1418IG#TRPBF supports unipolar operation from a single 5V supply (4.75–5.25V), delivering 0V to 4.096V input range with 15mW typical power dissipation. This configuration is fully specified in the Analog Input Range table and Typical Application diagram, making LTC1418IG#TRPBF ideal for battery-powered or 5V-rail-limited systems without negative supply generation.
What package type is used for the LTC1418IG#TRPBF?
The LTC1418IG#TRPBF is supplied in a 28-lead plastic SSOP (Small Outline Package) with 0.65mm lead pitch, identified as the "G" package in Linear Technology's ordering matrix. This surface-mount package measures 5.6mm × 10.2mm and is RoHS-compliant with lead-free finish, as verified in the PACKAGE/ORDER INFORMATION section of the LTC1418IG#TRPBF datasheet.
LTC1418IG#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 200k
- Number of Inputs:
- 1
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- ±5V, 5V
- Voltage - Supply, Digital:
- ±5V, 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 28-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1418IG#TRPBF FAQ
1.How can I place an order for LTC1418IG#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1418IG#TRPBF 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 LTC1418IG#TRPBF reliable?
The price and inventory of LTC1418IG#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1418IG#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1418IG#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1418IG#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1418IG#TRPBF?
LTC1418IG#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1418IG#TRPBF 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 LTC1418IG#TRPBF?
For technical support, including LTC1418IG#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1418IG#TRPBF requirements.
6.How does Aetrix verify that LTC1418IG#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1418IG#TRPBF 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 LTC1418IG#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1418IG#TRPBF?
All LTC1418IG#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1418IG#TRPBF, 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 LTC1418IG#TRPBF part is unused and in its original packaging.
Return procedure for LTC1418IG#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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