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Analog Devices Inc. LTC1418CG#TRPBF
- Part No.:
- LTC1418CG#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC1418CG#TRPBF.pdf
- Description:
- IC ADC 14BIT SAR 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,845
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Product details
Overview
LTC1418CG#TRPBF 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, 81.5dB S/(N+D), and 15mW typical power dissipation in unipolar mode - enabling high-accuracy data acquisition in battery-powered and isolated systems.
For engineers reviewing the LTC1418CG#TRPBF datasheet, LTC1418CG#TRPBF pinout, LTC1418CG#TRPBF application, or LTC1418CG#TRPBF equivalent, key selection criteria include its dual-supply flexibility (0V to 4.096V unipolar / ±2.048V bipolar input range), user-selectable Nap/Sleep shutdown modes, 28-pin SSOP package, and guaranteed no missing codes over temperature - critical for medical instrumentation, audio processing, and remote telemetry designs requiring DC precision and AC fidelity.
Technical Context
The LTC1418CG#TRPBF implements a successive approximation register (SAR) architecture with an internal differential capacitive DAC and high-speed comparator. Its conversion timing is controlled by either an internal clock (enabled via D0/EXT/INT = low) or external clock up to 4.5MHz applied to D4/EXTCLKIN, supporting precise synchronization in DSP- or FPGA-based signal chains.
It integrates a 2.5V precision reference (±10ppm/°C tempco, 2.48–2.52V output) and REFCOMP pin for 4.096V reference bypassing, while its differential analog inputs (AIN+, AIN–) support high-impedance sampling with 25pF input capacitance in sample mode and ±1µA leakage - enabling direct connection to low-output-impedance amplifiers or buffered sensor interfaces without external gain stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with guaranteed no missing codes over 0°C to 70°C - ensures monotonicity and full code coverage in closed-loop control or calibration applications. |
| Sampling Rate | 200ksps maximum - supports Nyquist-limited baseband signals up to 100kHz with 81.5dB S/(N+D) and –94dB THD. |
| INL / DNL | ±1.25LSB max integral linearity, ±1LSB max differential linearity - enables <0.01% absolute accuracy in 4–20mA loop receivers or precision weigh-scale front-ends. |
| Power Dissipation | 15mW typical (unipolar), 26.5mW typical (bipolar) - allows continuous operation in thermally constrained portable devices with minimal self-heating error. |
| Analog Input Range | 0V to 4.096V (unipolar, 5V supply) or ±2.048V (bipolar, ±5V supplies) - matches standard industrial voltage/current ranges and simplifies scaling in PLC I/O modules. |
| Reference | Integrated 2.5V bandgap reference (±10ppm/°C, 2.48–2.52V) with external REFCOMP bypass - eliminates need for external reference ICs while maintaining stability across temperature. |
| Digital Interface | SPI/MICROWIRE-compatible serial port (DC–10MHz SCLK) + 14-bit parallel bus - provides flexible microcontroller/DSP interfacing with BUSY and RD handshaking for deterministic timing. |
Pinout & Package
Package: 28-lead plastic SSOP (G-package), 0°C to 70°C operating temperature range, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN+, AIN– | Differential analog input pair | Accepts true differential or single-ended (AIN– grounded) signals; high-impedance input with 25pF sample-mode capacitance requires low-Z drive or buffering above ~1kΩ source resistance. |
| VREF | 2.5V reference output | Provides stable internal reference; must be bypassed to AGND with 1µF capacitor to maintain DC accuracy and noise immunity. |
| REFCOMP | 4.096V reference bypass node | Supports external 4.096V reference configuration; requires 10µF tantalum + 0.1µF ceramic bypass for optimal settling and PSRR. |
| D13–D0 | 14-bit parallel data outputs (D13 = MSB) | Three-state outputs enabled by CS and RD; SER/PAR pin selects between parallel and serial output modes - enables shared bus architectures. |
| CONVST | Active-low conversion start trigger | Falling edge initiates SAR conversion; timing-critical - must remain low ≥40ns and avoid mid-conversion reassertion to prevent code errors. |
| BUSY | Conversion status indicator | Active-low open-drain output signaling conversion progress; used for polling or interrupt-driven data capture with 35–70ns delay from CONVST. |
| SHDN, CS | Power management control | SHDN low + CS low = Nap mode (4.3µA IDD); SHDN low + CS high = Sleep mode (2µA IDD) - enables µA-level standby in intermittent-sampling systems. |
| D0 (EXT/INT), D4 (EXTCLKIN), D3 (SCLK) | Serial interface control and clock | D0 selects internal (low) or external (high) clock source; D4 accepts external clock ≤4.5MHz; D3 clocks serial data out on rising edge - supports master/slave SPI configurations. |
Key Features
| Feature | Design Value |
|---|---|
| Selectable output format | Hardware-configurable parallel or SPI/MICROWIRE serial I/O via SER/PAR pin - eliminates need for external multiplexers or protocol translators in mixed-interface systems. |
| Dual supply operation | Single 5V (unipolar) or ±5V (bipolar) supply compatibility - simplifies power design in systems with legacy bipolar sensors or mixed-signal PCBs. |
| Onboard precision reference | 2.5V ±10ppm/°C reference with 2.48–2.52V output tolerance - reduces BOM count and layout area vs. discrete reference solutions while meeting 14-bit DC accuracy requirements. |
| Low-power shutdown modes | Nap mode (4.3µA) and Sleep mode (2µA) with fast wake-up (<500ns) - enables energy harvesting or duty-cycled sensing nodes with sub-second latency recovery. |
| Differential input architecture | True differential AIN+/AIN– inputs with >60dB common-mode rejection at 10kHz - rejects noise in motor drives, industrial transducers, and isolated current-sense circuits. |
Applications
| Remote Data Acquisition | Battery Operated Systems |
|---|---|
Use Scenario: Wireless sensor nodes collecting vibration, temperature, and pressure data in oil & gas pipeline monitoring. IC Role / Device Role / Timing Role: Primary ADC digitizing conditioned analog sensor outputs; uses Nap mode between 100ms sampling intervals to extend battery life. Use Value: 15mW active power and 2µA Sleep mode enable >5-year CR2032 battery life; ±1.25LSB INL ensures traceable calibration across field units. | Use Scenario: Portable ECG monitor acquiring lead-II biopotential signals with clinical-grade fidelity. IC Role / Device Role / Timing Role: High-fidelity front-end ADC operating in unipolar 5V mode; leverages internal 2.5V reference to eliminate external reference drift errors. Use Value: 81.5dB S/(N+D) at 10kHz supports diagnostic ST-segment analysis; differential inputs reject 50/60Hz mains interference without additional filtering. |
| Digital Signal Processing | Medical Instrumentation |
Use Scenario: Real-time spectral analysis engine in handheld spectrum analyzer using FPGA-based FFT processing. IC Role / Device Role / Timing Role: Low-latency ADC feeding parallel bus directly to FPGA fabric; BUSY and RD signals synchronize data capture without FIFO overhead. Use Value: 3.4µs conversion time and 15ns data access time enable deterministic 200ksps streaming; SPI mode supports daisy-chained multi-channel expansion. | Use Scenario: Lab-grade pH meter requiring 0.001pH resolution via high-precision electrode voltage measurement. IC Role / Device Role / Timing Role: Precision DC-coupled ADC measuring mV-level electrode potentials; uses bipolar ±5V mode for symmetric offset handling. Use Value: ±1LSB DNL and no missing codes guarantee monotonic response across full 0–14pH range; 25pF input capacitance minimizes settling time with low-noise op-amp drivers. |
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 reference and level-shifting for 5V systems. | Better DC accuracy but lower speed; suited for static measurements (e.g., strain gauge bridges) where throughput is secondary to resolution. | Choose ADS8325IPW when 16-bit ENOB and ultra-low DNL (<±0.5LSB) outweigh need for 200ksps rate or parallel interface. |
| MAX11607EEE+ | 14-bit, 250ksps, internal reference, SPI interface only, 16-pin QSOP - lacks parallel output and bipolar supply support. | Higher sampling rate but limited to unipolar 0–VREF input; optimized for space-constrained embedded controllers with SPI-native peripherals. | Choose MAX11607EEE+ for compact, cost-sensitive designs needing >200ksps and minimal external components, accepting SPI-only constraint. |
Compared with ADS8325IPW and MAX11607EEE+, the LTC1418CG#TRPBF uniquely balances 200ksps throughput, dual-supply flexibility, parallel/serial I/O, and integrated reference - making it optimal for upgrade paths from legacy 12-bit ADCs in industrial DAQ and test equipment where board space and firmware compatibility are critical.
Availability
LTC1418CG#TRPBF is available at Aetrix Electronics and suitable for remote data acquisition, battery-operated medical devices, and digital signal processing systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LTC1418CG#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 LTC1418CG#TRPBF belongs to ADI's legacy Linear Technology precision data acquisition product line, designed specifically for applications demanding high DC accuracy, low power, and flexible digital interfacing in harsh or portable environments.
FAQ
What supply configurations does the LTC1418CG#TRPBF support?
The LTC1418CG#TRPBF supports both single 5V (unipolar mode, 0V to 4.096V input range) and dual ±5V (bipolar mode, ±2.048V input range) operation. VDD must be 4.75V–5.25V; VSS is 0V in unipolar mode and –4.75V to –5.25V in bipolar mode. The LTC1418CG#TRPBF integrates internal regulation and reference circuitry compatible with either configuration without external component changes.
Does the LTC1418CG#TRPBF require an external reference?
No, the LTC1418CG#TRPBF includes a precision 2.5V internal reference with ±10ppm/°C tempco and 2.48–2.52V output tolerance, sufficient for 14-bit accuracy across 0°C to 70°C. An external reference may be used via the REFCOMP pin for enhanced stability or custom voltage scaling, but it is not required. The LTC1418CG#TRPBF maintains ±1.25LSB INL using the internal reference alone.
How does the LTC1418CG#TRPBF handle power management in portable applications?
The LTC1418CG#TRPBF offers two user-selectable low-power modes: Nap mode (4.3µA supply current) and Sleep mode (2µA), activated by driving SHDN low while controlling CS. Wake-up from Nap mode takes <500ns, enabling rapid resumption of sampling in duty-cycled systems. In active 200ksps operation, the LTC1418CG#TRPBF draws only 15mW (unipolar), minimizing thermal load and extending battery runtime.
Can the LTC1418CG#TRPBF interface directly with a microcontroller SPI port?
Yes, the LTC1418CG#TRPBF features a SPI/MICROWIRE-compatible serial interface with D1/DOUT, D2/CLKOUT, D3/SCLK, D4/EXTCLKIN, and D0/EXT/INT pins. It supports clock frequencies from DC to 10MHz and operates as either master or slave. The LTC1418CG#TRPBF requires no level-shifting for 5V-tolerant MCUs and uses standard SPI timing - confirmed by tH SCLK ≥10ns and tL SCLK ≥20ns specifications.
What is the guaranteed performance of the LTC1418CG#TRPBF over temperature?
The LTC1418CG#TRPBF is specified for 0°C to 70°C operation (Commercial grade). Over this range, it guarantees ±1.25LSB integral nonlinearity, ±1LSB differential nonlinearity, no missing codes, 81.5dB S/(N+D) at 97.5kHz, and 15mW typical power dissipation in unipolar mode. All dynamic and DC specs in the datasheet marked with "l" apply across this full temperature range - verified by production testing, not just characterization.
LTC1418CG#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:
- 0°C ~ 70°C
- Supplier Device Package:
- 28-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1418CG#TRPBF FAQ
1.How can I place an order for LTC1418CG#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1418CG#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 LTC1418CG#TRPBF reliable?
The price and inventory of LTC1418CG#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1418CG#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1418CG#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1418CG#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1418CG#TRPBF?
LTC1418CG#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1418CG#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 LTC1418CG#TRPBF?
For technical support, including LTC1418CG#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1418CG#TRPBF requirements.
6.How does Aetrix verify that LTC1418CG#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1418CG#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 LTC1418CG#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1418CG#TRPBF?
All LTC1418CG#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1418CG#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 LTC1418CG#TRPBF part is unused and in its original packaging.
Return procedure for LTC1418CG#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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