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Analog Devices Inc. LTC1418AIG#PBF
- Part No.:
- LTC1418AIG#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC1418AIG#PBF.pdf
- Description:
- IC ADC 14BIT SAR 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:100
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Product details
Overview
LTC1418AIG#PBF from Analog Devices (formerly Linear Technology) is a low-power, 14-bit, 200ksps analog-to-digital converter with selectable parallel or SPI/MICROWIRE-compatible serial output. It operates from single 5V or ±5V supplies, features an integrated 2.5V reference and sample-and-hold, and delivers ±1.25LSB INL and 81.5dB S/(N+D) at 100kHz input-enabling high-accuracy data acquisition in battery-powered instrumentation and isolated telecom interfaces.
For engineers reviewing the LTC1418AIG#PBF datasheet, LTC1418AIG#PBF pinout, LTC1418AIG#PBF application, or LTC1418AIG#PBF equivalent, key selection criteria include its industrial temperature range (–40°C to +85°C), dual-mode power shutdown (Nap/Sleep), differential high-impedance analog inputs, and flexible serial/parallel interface timing compatibility with microcontrollers and DSPs.
Technical Context
The LTC1418AIG#PBF implements a successive approximation register (SAR) architecture with an internal capacitive DAC and precision comparator. Its conversion cycle begins on the falling edge of CONVST and completes in 3.4–4µs, with BUSY signaling active during conversion.
It supports two reference configurations: internal 2.5V reference (±20ppm/°C tempco, 2.48–2.52V) or external reference up to 4.096V. Input ranges are 0V to 4.096V (unipolar, VSS = 0V) or ±2.048V (bipolar, VSS = –5V), with differential input structure providing common-mode rejection up to 90dB at 1kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with no missing codes over full temperature range-guarantees monotonicity and deterministic code transitions in closed-loop control. |
| Sampling Rate | 200ksps maximum-supports real-time capture of signals up to 100kHz Nyquist bandwidth without aliasing. |
| INL / DNL | ±1.25LSB / ±1LSB max over temperature-ensures <0.0076% full-scale linearity error for precision sensor digitization. |
| Power Dissipation | 15mW typical (unipolar), 26.5mW typical (bipolar)-enables operation in thermally constrained portable systems. |
| S/(N+D) | 81.5dB at 97.5kHz input-translates to ~13.3 effective bits, sufficient for high-fidelity audio and medical waveform analysis. |
| THD | –94dB at 100kHz-minimizes harmonic contamination in spectral analysis and communications signal processing. |
| Reference Output | 2.500V ±20mV (0°C to 85°C)-provides stable excitation for ratiometric sensors and eliminates need for external reference IC. |
Pinout & Package
28-lead plastic SSOP (G package), 5.6mm × 10.2mm body, 0.65mm lead pitch, RoHS-compliant lead-free finish (PBF).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN+, AIN– | Differential analog input pair | Accepts ±2.048V bipolar or 0–4.096V unipolar signals; high-impedance (>1GΩ) with 5pF hold-mode capacitance enables direct connection to low-leakage sources. |
| VREF | 2.5V reference output | Provides precision voltage source for external circuitry; requires 1µF bypass to AGND for stability and noise reduction. |
| REFCOMP | 4.096V reference bypass node | Stabilizes internal reference amplifier; must be bypassed with 10µF tantalum + 0.1µF ceramic to AGND. |
| D13–D0 | Parallel data outputs (MSB to LSB) | Three-state outputs enabled by CS and RD; support 14-bit parallel readout synchronized to RD falling edge. |
| SER/PAR | Output format select | High = serial mode (DOUT, SCLK, CLKOUT, EXTCLKIN active); low = parallel mode (D13–D0 active). |
| CONVST | Conversion start trigger | Falling-edge sensitive; initiates SAR cycle and resets internal logic-must remain low ≥40ns before BUSY assertion. |
| BUSY | Conversion status indicator | Active-low open-drain output; asserts low for 3.4–4µs during conversion-used for handshaking with host processor. |
| SHDN, CS | Power management controls | SHDN low + CS low = Nap mode (4.3µA IDD); SHDN low + CS high = Sleep mode (2µA IDD); both high = normal operation. |
Key Features
| Feature | Design Value |
|---|---|
| Selectable serial/parallel interface | Reduces BOM count and PCB routing complexity-serial mode uses only 4 pins (DOUT, SCLK, EXTCLKIN, EXT/INT), parallel mode delivers full 14-bit word in one cycle. |
| Onboard 2.5V reference | Eliminates external reference IC and associated layout sensitivity-reference drift ≤±20ppm/°C ensures <0.02% full-scale error shift across industrial temperature range. |
| Dual shutdown modes | Nap mode (4.3µA) enables rapid wake-up (<500ns) for burst sampling; Sleep mode (2µA) maximizes battery life in always-on monitoring applications. |
| Differential input architecture | Rejects common-mode noise up to 90dB at 1kHz-critical for accurate measurement in noisy industrial environments with long sensor cables. |
| Internal sample-and-hold | Acquisition time ≤1µs with low-source-impedance drive-removes need for external op-amp buffer in most DC and low-frequency AC applications. |
Applications
| Remote Data Acquisition | Battery Operated Systems |
|---|---|
Use Scenario: Distributed environmental sensors (temperature, pressure, humidity) transmitting digitized readings over RS-485 or LoRaWAN links. IC Role / Device Role / Timing Role: Precision ADC capturing slow-varying analog sensor outputs with minimal power overhead and robust noise immunity. Use Value: ±1.25LSB INL and 81.5dB S/(N+D) ensure <0.01% measurement uncertainty; Nap mode reduces average current to <10µA in sleep-wake cycles. | Use Scenario: Portable ECG monitors, glucose meters, and handheld test equipment requiring >100-hour battery life. IC Role / Device Role / Timing Role: Low-power signal digitizer interfacing with ultra-low-power MCU via serial SPI bus. Use Value: 15mW typical dissipation and Sleep mode (2µA) extend coin-cell or Li-ion runtime; integrated reference removes calibration drift risk. |
| Digital Signal Processing | Medical Instrumentation |
Use Scenario: Real-time vibration analysis in predictive maintenance systems using FPGA-based FFT engines. IC Role / Device Role / Timing Role: High-throughput ADC feeding 200ksps data stream into programmable logic with deterministic latency. Use Value: 200ksps sampling and 3.4µs conversion time enable continuous streaming without FIFO overflow; THD ≤–94dB preserves signal integrity for spectral feature extraction. | Use Scenario: Patient vital sign monitors acquiring respiration, pulse oximetry, and bioimpedance waveforms. IC Role / Device Role / Timing Role: Medical-grade ADC meeting IEC 60601-2-51 requirements for accuracy and isolation compliance. Use Value: No missing codes and ±1LSB DNL guarantee diagnostic reliability; differential inputs suppress 50/60Hz mains interference in non-isolated front-ends. |
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 |
|---|---|---|---|
| ADS8860IDRCT | 16-bit resolution, 100ksps, SPI-only interface, 1.8V/3.3V supply, no internal reference | Higher resolution but lower speed; requires external reference and level-shifting for 5V systems | Choose when ENOB >14 bits is mandatory and throughput ≤100ksps suffices. |
| MAX11902ETX+ | 14-bit, 250ksps, internal reference, SPI interface only, –40°C to +105°C rating | Faster sampling but lacks parallel output; wider temp range suits automotive under-hood use | Choose when serial-only interface is acceptable and extended temperature operation is required. |
Compared with ADS8860IDRCT and MAX11902ETX+, the LTC1418AIG#PBF uniquely balances 200ksps speed, dual serial/parallel flexibility, integrated 2.5V reference, and industrial temperature grade-making it optimal for mixed-signal embedded systems where interface adaptability and power efficiency are co-prioritized.
Availability
LTC1418AIG#PBF is available at Aetrix Electronics and suitable for remote data acquisition, battery-operated medical devices, and digital signal processing applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC1418AIG#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 LTC1418AIG#PBF belongs to ADI's legacy Linear Technology precision data acquisition product line, designed specifically for low-power, high-accuracy applications demanding excellent DC specs (INL/DNL), dynamic performance (S/(N+D), THD), and flexible digital interfacing in harsh thermal environments.
FAQ
What is the operating temperature range of the LTC1418AIG#PBF?
The LTC1418AIG#PBF is rated for industrial operation from –40°C to +85°C, as confirmed in the manufacturer's order information table. This range applies to all DC and AC specifications including INL (±1.25LSB), DNL (±1LSB), and power consumption (15mW typical). The device uses the G-package SSOP and is marked "1418AIG" per Linear Technology's packaging nomenclature.
Does the LTC1418AIG#PBF include an internal voltage reference?
Yes, the LTC1418AIG#PBF integrates a precision 2.500V ±20mV reference with ±20ppm/°C tempco over –40°C to +85°C. It is accessible at Pin 3 (VREF) and requires a 1µF capacitor to AGND. The reference can be used internally for ADC conversion or externally to bias sensors-eliminating the need for discrete reference ICs in most designs.
How does the LTC1418AIG#PBF handle power management?
The LTC1418AIG#PBF offers two user-selectable low-power modes: Nap mode (4.3µA IDD, 0.1µA ISS) and Sleep mode (2µA IDD, 0.1µA ISS), activated via SHDN and CS pins. Nap mode allows sub-microsecond wake-up (<500ns) for burst sampling, while Sleep mode minimizes quiescent current for extended standby-both critical for battery longevity in portable LTC1418AIG#PBF deployments.
What are the supported analog input configurations for the LTC1418AIG#PBF?
The LTC1418AIG#PBF supports unipolar (0V to 4.096V, VSS = 0V) and bipolar (±2.048V, VSS = –5V) input ranges. Inputs are differential (AIN+, AIN–), enabling common-mode noise rejection. Single-ended operation is also possible by grounding AIN–, though DC specs assume differential input per datasheet Note 6. Input leakage is ±1µA max, and acquisition time is ≤1µs with low-impedance sources.
Can the LTC1418AIG#PBF interface directly with a microcontroller using SPI?
Yes, the LTC1418AIG#PBF provides native SPI/MICROWIRE-compatible serial communication. When SER/PAR = high, pins D1 (DOUT), D3 (SCLK), D4 (EXTCLKIN), and D0 (EXT/INT) form a 4-wire interface supporting clock frequencies up to 12.5MHz. It operates as either master or slave, and the BUSY signal enables synchronous data capture-allowing seamless integration with ARM Cortex-M or PIC microcontrollers without glue logic.
LTC1418AIG#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- 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:
- -
LTC1418AIG#PBF FAQ
1.How can I place an order for LTC1418AIG#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1418AIG#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 LTC1418AIG#PBF reliable?
The price and inventory of LTC1418AIG#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1418AIG#PBF is usually 5 days.
3.What payment methods are accepted for LTC1418AIG#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1418AIG#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1418AIG#PBF?
LTC1418AIG#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1418AIG#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 LTC1418AIG#PBF?
For technical support, including LTC1418AIG#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1418AIG#PBF requirements.
6.How does Aetrix verify that LTC1418AIG#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1418AIG#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 LTC1418AIG#PBF meets industry standards.
7.What is the process for return or replacement of LTC1418AIG#PBF?
All LTC1418AIG#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1418AIG#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 LTC1418AIG#PBF part is unused and in its original packaging.
Return procedure for LTC1418AIG#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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