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Analog Devices Inc. LTC1418CG#PBF
- Part No.:
- LTC1418CG#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC1418CG#PBF.pdf
- Description:
- IC ADC 14BIT SAR 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,522
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Product details
Overview
LTC1418CG#PBF from Analog Devices (formerly Linear Technology) is a low-power, 14-bit, 200ksps successive-approximation analog-to-digital converter with selectable parallel or SPI/MICROWIRE-compatible serial output. It operates from single 5V or ±5V supplies, integrates a 2.5V precision reference and sample-and-hold, and delivers ±1.25LSB INL, 81.5dB S/(N+D), and 15mW typical power dissipation in battery-powered data acquisition systems.
For engineers reviewing the LTC1418CG#PBF datasheet, LTC1418CG#PBF pinout, LTC1418CG#PBF application, or LTC1418CG#PBF equivalent, this page provides verified technical context, package mapping, real-world interface timing, validated alternatives, and design-meaning specifications - all confirmed for the LTC1418CG#PBF variant with 28-lead SSOP packaging and 0°C to 70°C commercial temperature range.
Technical Context
The LTC1418CG#PBF implements a differential capacitive DAC-based successive approximation architecture with internal clock generation and dual-mode shutdown (Nap/Sleep). Its sample-and-hold acquires input signals in ≤1µs and holds during conversion, enabling precise 14-bit digitization of unipolar (0V–4.096V) or bipolar (±2.048V) analog inputs.
Digital interface flexibility includes parallel 14-bit output with RD/CS/CONVST control, or serial mode using SCLK/DOUT/EXTCLKIN/EXT/INT pins supporting master/slave SPI/MICROWIRE operation up to 10MHz. BUSY signal provides asynchronous conversion status indication without polling overhead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with guaranteed no missing codes over temperature - ensures monotonicity and full-scale fidelity in closed-loop control or measurement systems. |
| Sampling Rate | 200ksps maximum - supports Nyquist-limited baseband sampling up to 100kHz with 81.5dB S/(N+D) and –94dB THD. |
| INL / DNL | ±1.25LSB / ±1LSB max - enables high-accuracy DC measurements such as sensor calibration or medical instrumentation without post-processing correction. |
| Power Dissipation | 15mW typical (unipolar), 21.5mW typical (bipolar) - allows continuous operation in thermally constrained, battery-powered portable instruments. |
| Analog Input Range | 0V to 4.096V (unipolar) or ±2.048V (bipolar) - matches standard reference voltages and simplifies scaling for industrial transducer interfaces. |
| Reference | Integrated 2.5V ±10ppm/°C (commercial) reference with 2.48V–2.52V output - eliminates external reference component count while maintaining <±0.5% full-scale error. |
| Output Interface | Selectable parallel (14-bit D13–D0) or serial (SPI/MICROWIRE) - permits direct microcontroller connection or space-constrained PCB layouts via 4-wire serial bus. |
Pinout & Package
Package: 28-lead plastic SSOP (G package), 0°C to 70°C operating temperature, lead-free finish (PBF).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN+, AIN– | Differential analog input pair | Accepts unipolar (0V–4.096V) or bipolar (±2.048V) signals; high-impedance input draws ≤±1µA leakage - compatible with op-amp buffers or direct transducer connection. |
| VREF | 2.5V internal reference output | Provides stable 2.5V reference for external circuitry; requires 1µF bypass to AGND - eliminates need for separate voltage reference IC in most designs. |
| REFCOMP | 4.096V reference bypass node | Stabilizes internal 4.096V reference used for unipolar full-scale; requires 10µF tantalum + 0.1µF ceramic - critical for maintaining ±1.25LSB INL accuracy. |
| D13–D0 | Parallel data outputs (14-bit) | Three-state outputs enabled by CS/RD; D13 = MSB - supports direct connection to 14-bit microcontroller data bus with minimal glue logic. |
| SER/PAR | Interface mode select | High = serial mode (SCLK/DOUT/EXTCLKIN active); low = parallel mode - enables runtime reconfiguration without hardware change. |
| CONVST | Conversion start trigger | Falling-edge initiated; minimum pulse width 40ns - synchronizes sampling to external events or system clocks with deterministic latency. |
| BUSY | Conversion status indicator | Active-low open-drain output - allows interrupt-driven data readout or multi-device synchronization without polling delay. |
| SHDN, CS | Power management controls | SHDN low + CS low = Nap mode (4.3µA); SHDN low + CS high = Sleep mode (0.1µA) - extends battery life in intermittent-sampling applications. |
Key Features
| Feature | Design Value |
|---|---|
| Flexible I/O architecture | Hardware-selectable parallel or SPI/MICROWIRE serial interface reduces BOM count and layout complexity across product variants. |
| Dual shutdown modes | Nap mode (4.3µA) enables fast wake-up (<500ns); Sleep mode (0.1µA) maximizes standby time - ideal for energy-harvesting or remote sensor nodes. |
| Onboard precision reference | 2.5V ±10ppm/°C (commercial) reference with 2.48V–2.52V tolerance eliminates external reference IC and associated calibration effort. |
| Differential input with high CMRR | Input common-mode rejection >60dB up to 100kHz - rejects noise in industrial environments where AIN+/AIN– are routed near switching power supplies. |
| Guaranteed no missing codes | Validated over full 0°C to 70°C range - ensures reliable operation in medical or test equipment without firmware compensation tables. |
Applications
| Remote Data Acquisition | Battery-Operated Systems |
|---|---|
|
Use Scenario: Distributed environmental monitoring nodes collecting temperature, pressure, and humidity data at 100Hz intervals over LoRaWAN. IC Role / Device Role / Timing Role: Primary ADC digitizing conditioned sensor outputs; uses Nap mode between samples to extend 10-year battery life. Use Value: 15mW typical power and 0.1µA Sleep mode enable >5 years of operation on two AA cells; ±1.25LSB INL ensures traceable calibration without field recalibration. |
Use Scenario: Portable ECG monitor acquiring 12-bit biomedical waveforms at 250SPS with real-time QRS detection. IC Role / Device Role / Timing Role: High-fidelity front-end ADC with differential input rejecting 50/60Hz mains interference; BUSY signal triggers DMA transfer. Use Value: 81.5dB S/(N+D) and –94dB THD preserve diagnostic waveform integrity; integrated 2.5V reference eliminates drift-related baseline errors. |
| Digital Signal Processing | Isolated Data Acquisition Systems |
|
Use Scenario: Industrial motor controller digitizing current/voltage feedback for FOC algorithms running on ARM Cortex-M7. IC Role / Device Role / Timing Role: Real-time ADC synchronized to PWM carrier via CONVST edge; parallel interface minimizes CPU overhead. Use Value: 200ksps throughput supports 20kHz control loops; ±1LSB DNL prevents torque ripple from quantization nonlinearity. |
Use Scenario: High-voltage power meter measuring 1000V AC line with galvanic isolation between sensor and MCU. IC Role / Device Role / Timing Role: Isolated-side ADC interfacing to digital isolator (e.g., ADuM3401); SER/PAR pin selects compact serial mode for isolated bus routing. Use Value: SPI-compatible serial interface reduces isolated trace count from 16 to 4; REF COMP pin stabilizes reference under isolation barrier noise. |
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 |
|---|---|---|---|
| ADS8326IPW | 16-bit resolution, 500ksps, SPI-only interface, no internal reference - requires external 2.5V reference and higher supply current (5.5mA). | Better resolution for precision metrology; unsuitable for parallel-bus microcontrollers or low-power sleep modes. | Choose when ENOB >13.5 bits is required and system can accommodate external reference and higher power. |
| MAX11607EEE+ | 14-bit, 200ksps, internal reference, SPI interface only, 16-pin QSOP - lacks parallel output and bipolar input support. | Smaller footprint for space-constrained designs; limited to unipolar 0V–VREF input range. | Choose for cost-sensitive, size-limited applications where serial interface suffices and bipolar input is unnecessary. |
Compared with ADS8326IPW and MAX11607EEE+, the LTC1418CG#PBF uniquely combines parallel/serial flexibility, integrated bipolar/unipolar input scaling, and sub-µA Sleep mode - making it optimal for legacy microcontroller integration and ultra-low-power portable instrumentation where reference integration and interface adaptability are critical.
Availability
LTC1418CG#PBF is available at Aetrix Electronics and suitable for remote data acquisition, battery-operated medical devices, and isolated industrial monitoring requiring stable component supply across long production lifecycles.
Supply support for LTC1418CG#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 acquired Linear Technology in 2017 and maintains full technical and manufacturing continuity for the LTC portfolio, including precision data converters and power management ICs.
The LTC1418CG#PBF belongs to Linear's high-accuracy, low-power SAR ADC family designed for portable instrumentation, industrial process control, and isolated sensing - emphasizing integrated references, flexible interfaces, and guaranteed monotonicity.
FAQ
What is the operating temperature range for the LTC1418CG#PBF?
The LTC1418CG#PBF is specified for 0°C to 70°C commercial operation, as confirmed by its part marking "CG" and order information table. This range covers standard industrial and consumer environments but excludes extended-temperature applications - for –40°C to 85°C operation, the LTC1418IG#PBF variant must be selected. All DC and AC specifications, including ±1.25LSB INL and 81.5dB S/(N+D), are guaranteed across this full 0°C to 70°C range.
Does the LTC1418CG#PBF require an external reference?
No, the LTC1418CG#PBF includes a fully trimmed 2.5V internal reference with ±10ppm/°C tempco (commercial grade) and 2.48V–2.52V output tolerance. It also provides a dedicated REF COMP pin for stabilizing the 4.096V unipolar full-scale reference. External reference use is optional and supported only when pin D0 (EXT/INT) is driven high - but doing so forfeits the guaranteed ±1.25LSB INL performance unless the external reference meets stringent stability and noise requirements.
How does the LTC1418CG#PBF handle power management in portable applications?
The LTC1418CG#PBF offers two distinct low-power states: Nap mode (4.3µA, fast wake-up <500ns) and Sleep mode (0.1µA, slower wake-up). Both are controlled jointly by SHDN and CS pins - SHDN low + CS low enters Nap mode; SHDN low + CS high enters Sleep mode. This dual-mode architecture allows designers to optimize for either rapid response (e.g., event-triggered sampling) or maximum battery longevity (e.g., hourly environmental logging), both validated for the LTC1418CG#PBF's 0°C to 70°C range.
Can the LTC1418CG#PBF interface directly with a microcontroller lacking SPI hardware?
Yes - the LTC1418CG#PBF supports parallel 14-bit output via D13–D0 pins, controlled by RD, CS, and BUSY signals. This allows direct connection to 8-bit or 16-bit microcontrollers (e.g., STM32, PIC, or legacy 8051) without bit-banged SPI. The parallel interface requires only three control lines and delivers data in <30ns after RD assertion, making it ideal for systems where CPU resources are constrained or where deterministic latency is critical for real-time control loops.
What is the maximum clock frequency supported in serial mode for the LTC1418CG#PBF?
In serial mode, the LTC1418CG#PBF supports SCLK frequencies up to 10MHz, as explicitly specified in the "Digital Inputs and Outputs" section of the datasheet. This allows full 14-bit word transfer in ≤1.4µs, enabling sustained 200ksps throughput even with serial interface - provided the host controller can meet tH SCLK ≥10ns and tL SCLK ≥20ns timing constraints. The device operates correctly from DC to 10MHz, making it compatible with both high-speed microcontrollers and lower-frequency MCUs using software-controlled GPIO toggling.
LTC1418CG#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:
- 0°C ~ 70°C
- Supplier Device Package:
- 28-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1418CG#PBF FAQ
1.How can I place an order for LTC1418CG#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1418CG#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 LTC1418CG#PBF reliable?
The price and inventory of LTC1418CG#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1418CG#PBF is usually 5 days.
3.What payment methods are accepted for LTC1418CG#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1418CG#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1418CG#PBF?
LTC1418CG#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1418CG#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 LTC1418CG#PBF?
For technical support, including LTC1418CG#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1418CG#PBF requirements.
6.How does Aetrix verify that LTC1418CG#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1418CG#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 LTC1418CG#PBF meets industry standards.
7.What is the process for return or replacement of LTC1418CG#PBF?
All LTC1418CG#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1418CG#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 LTC1418CG#PBF part is unused and in its original packaging.
Return procedure for LTC1418CG#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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