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Analog Devices Inc. LTC1418ACG#TRPBF
- Part No.:
- LTC1418ACG#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC1418ACG#TRPBF.pdf
- Description:
- IC ADC 14BIT SAR 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,760
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Product details
Overview
LTC1418ACG#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 and 81.5dB S/(N+D) at Nyquist for precision data acquisition in battery-powered and isolated systems.
For engineers reviewing the LTC1418ACG#TRPBF datasheet, LTC1418ACG#TRPBF pinout, LTC1418ACG#TRPBF application, or LTC1418ACG#TRPBF equivalent, key selection criteria include its dual-supply flexibility, user-selectable Nap/Sleep shutdown modes, differential high-impedance analog input, and guaranteed no missing codes over 0°C to 70°C.
Technical Context
The LTC1418ACG#TRPBF employs a successive approximation register (SAR) architecture with an internal capacitive DAC and high-speed comparator. Its conversion timing is controlled by either an internal clock (selected via EXT/INT pin) or external clock up to 4.5MHz applied to EXTCLKIN, supporting precise synchronization in DSP and real-time control systems.
It integrates a precision 2.5V reference (±10ppm/°C tempco, 2.48–2.52V output), REF COMP pin for 4.096V reference bypass, and separate AGND/DGND pins to maintain analog signal integrity. The analog input accepts 0V–4.096V unipolar or ±2.048V bipolar ranges with 25pF input capacitance in sample mode and ±1µA leakage current.
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 acquisition of audio-band and telecom signals up to 100kHz Nyquist frequency. |
| INL / DNL | ±1.25LSB / ±1LSB max - enables accurate DC measurement and calibration in medical instrumentation and sensor interfaces. |
| S/(N + D) | 81.5dB at 97.5kHz input - provides >13-bit effective resolution for high-fidelity signal capture in digital signal processing. |
| Power Dissipation | 15mW typical (unipolar) - allows continuous operation in thermally constrained, battery-powered remote data loggers. |
| Reference | Integrated 2.5V ±10ppm/°C reference - eliminates external reference component count and drift-related gain error in portable test equipment. |
| Supply Range | Single 5V (4.75–5.25V) or ±5V (±4.75–±5.25V) - simplifies power design across industrial and mixed-signal embedded platforms. |
Pinout & Package
Package: 28-lead plastic SSOP (G package), 5.6mm × 10.2mm body, 0.635mm pitch, RoHS-compliant lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN+, AIN– | Differential analog input pair | Accepts 0V–4.096V unipolar or ±2.048V bipolar inputs; high common-mode rejection minimizes noise coupling in noisy environments. |
| VREF | 2.5V reference output | Stable internal reference source; requires 1µF bypass to AGND for optimal noise performance and line regulation. |
| REFCOMP | 4.096V reference bypass node | Supports external 4.096V reference use; must be bypassed with 10µF tantalum + 0.1µF ceramic for stability. |
| D13–D0 | Parallel data outputs (14-bit) | Three-state, MSB-first outputs; SER/PAR pin selects between parallel and serial I/O modes. |
| D1 (DOUT), D2 (CLKOUT), D3 (SCLK), D4 (EXTCLKIN), D0 (EXT/INT) | Serial interface terminals | Enable SPI/MICROWIRE-compatible communication; EXT/INT configures internal vs external clock source. |
| CONVST, BUSY, RD, CS | Control and status signals | Asynchronous conversion start (falling edge), busy flag, read strobe, and chip select enable direct microprocessor interfacing without glue logic. |
| SHDN, SER/PAR | Mode configuration inputs | SHDN + CS selects Nap (fast wake-up) or Sleep (ultra-low current) shutdown; SER/PAR sets output format at power-up. |
| VDD, VSS, AGND, DGND | Power and ground terminals | Separate analog/digital grounds reduce noise coupling; VSS = 0V for unipolar, –5V for bipolar operation. |
Key Features
| Feature | Design Value |
|---|---|
| Selectable parallel or serial output | Reduces PCB routing complexity: parallel mode enables fast burst reads; serial mode cuts interconnect count for space-constrained designs. |
| Two power shutdown modes | Nap mode (2µA) enables sub-microsecond wake-up for event-triggered sampling; Sleep mode (0.1µA) extends battery life in always-on monitoring nodes. |
| Differential high-impedance analog input | 25pF input capacitance and ±1µA leakage allow direct connection to high-Z sensors (e.g., piezoelectric transducers) without buffer amplification. |
| Internal 2.5V reference with low tempco | ±10ppm/°C drift over 0°C–70°C ensures <0.02% full-scale gain error variation - critical for portable calibrators and field instruments. |
| Guaranteed no missing codes | Eliminates code ambiguity in control feedback loops and position encoders where monotonic response is mandatory for system stability. |
Applications
| Remote Data Acquisition | Battery Operated Systems |
|---|---|
Use Scenario: Wireless sensor nodes collecting vibration, temperature, and pressure data in oilfield or environmental monitoring. IC Role / Device Role / Timing Role: Primary ADC digitizing conditioned analog sensor outputs; BUSY signal synchronizes RF transmission post-conversion. Use Value: 15mW typical power and Nap/Sleep modes extend 2xAA battery life to >2 years in periodic sampling configurations. | Use Scenario: Portable ECG monitors requiring clinical-grade signal fidelity and multi-day runtime on rechargeable Li-ion cells. IC Role / Device Role / Timing Role: High-accuracy front-end ADC capturing 1–100Hz biopotential waveforms; internal reference removes need for external precision voltage source. Use Value: ±1.25LSB INL and 81.5dB S/(N+D) meet IEC 60601-2-27 requirements for diagnostic electrocardiographs. |
| Digital Signal Processing | Isolated Data Acquisition Systems |
Use Scenario: Real-time spectral analysis in industrial motor drives using FPGA-based FFT engines. IC Role / Device Role / Timing Role: ADC feeding parallel bus directly into FPGA fabric; CONVST and RD signals provide deterministic timing for pipeline alignment. Use Value: 200ksps throughput with 3.4µs conversion time enables 5µs minimum inter-sample intervals - sufficient for 10kHz fundamental analysis. | Use Scenario: High-voltage grid monitoring where analog inputs are galvanically isolated via optocouplers or digital isolators. IC Role / Device Role / Timing Role: Isolated-side ADC converting isolated current/voltage sensor outputs; SER/PAR pin enables compact serial interface across isolation barrier. Use Value: Differential input rejects common-mode noise induced by switching power converters, maintaining >80dB CMRR up to 100kHz. |
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, 2.5V reference only, 16-pin TSSOP | Higher resolution but lower speed; lacks parallel output and bipolar input support | Choose for precision DC measurements where 16-bit accuracy outweighs 200ksps requirement and bipolar range. |
| MAX1166BCAP+ | 14-bit, 250ksps, internal reference, SPI interface only, 20-pin TQFN, no Nap/Sleep modes | Faster sampling but no low-power shutdown states; smaller footprint but higher thermal resistance | Choose when board space is critical and continuous 250ksps operation justifies higher 25mW active power. |
Compared with ADS8325IPW and MAX1166BCAP+, the LTC1418ACG#TRPBF uniquely balances 200ksps speed, dual-supply flexibility, parallel/serial I/O choice, and ultra-low shutdown current - making it optimal for portable, isolated, or mixed-signal systems requiring both performance and power efficiency.
Availability
LTC1418ACG#TRPBF is available at Aetrix Electronics and suitable for remote data acquisition, battery-operated medical devices, and isolated industrial monitoring requiring stable component supply across extended production lifecycles.
Supply support for LTC1418ACG#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 acquired Linear Technology in 2017 and maintains its precision analog product lines with focus on high-performance signal conditioning and data conversion.
The LTC1418 series was designed for low-power, high-accuracy data acquisition in portable, isolated, and mixed-signal embedded systems - emphasizing integration, supply flexibility, and guaranteed monotonicity.
FAQ
What is the operating temperature range for the LTC1418ACG#TRPBF?
The LTC1418ACG#TRPBF is specified for commercial temperature operation from 0°C to 70°C. This grade is validated for use in indoor industrial controls, test equipment, and consumer-grade portable instruments where ambient conditions remain within this range. The 'A' suffix denotes improved INL/DNL performance versus standard LTC1418CG#TRPBF, and the 'C' grade confirms compliance across the full 0°C–70°C span.
Does the LTC1418ACG#TRPBF require an external reference?
No, the LTC1418ACG#TRPBF includes a precision 2.5V internal reference with ±10ppm/°C tempco and 2.48V–2.52V output tolerance. An external reference may be used via the REF COMP pin for applications needing 4.096V scaling or enhanced long-term stability, but it is not required. The internal reference eliminates BOM cost and layout area for most general-purpose data acquisition uses of the LTC1418ACG#TRPBF.
How does the SER/PAR pin affect the LTC1418ACG#TRPBF interface behavior?
The SER/PAR pin on the LTC1418ACG#TRPBF selects between parallel (SER/PAR = low) and serial (SER/PAR = high) output modes at power-up. In parallel mode, D13–D0 drive 14-bit data simultaneously after RD assertion. In serial mode, D1 (DOUT), D3 (SCLK), and D2 (CLKOUT) form an SPI-compatible interface with MSB-first framing. This pin enables hardware-configurable I/O without firmware reconfiguration, simplifying design reuse across different host processor architectures for the LTC1418ACG#TRPBF.
What are the key differences between Nap mode and Sleep mode on the LTC1418ACG#TRPBF?
Nap mode (SHDN = low, CS = low) reduces supply current to 2µA and allows wake-up in 500ns upon CONVST assertion - ideal for event-driven sampling. Sleep mode (SHDN = low, CS = high) draws only 0.1µA but requires longer wake-up latency; it is suited for extended idle periods between scheduled acquisitions. Both modes preserve internal state, and neither requires reinitialization. These distinct low-power states give designers granular control over energy trade-offs in battery-powered implementations of the LTC1418ACG#TRPBF.
Can the LTC1418ACG#TRPBF operate with a single 3.3V supply?
No, the LTC1418ACG#TRPBF is not rated for 3.3V operation. Its absolute maximum positive supply voltage is 6V, but the recommended operating range is 4.75V–5.25V for unipolar mode or ±4.75V–±5.25V for bipolar mode. Operation below 4.75V risks degraded INL, increased DNL, and failure to meet the 200ksps sampling rate specification. For 3.3V systems, designers should select a compatible 14-bit SAR ADC such as the AD7949 or ADS7953 instead of the LTC1418ACG#TRPBF.
LTC1418ACG#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:
- -
LTC1418ACG#TRPBF FAQ
1.How can I place an order for LTC1418ACG#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1418ACG#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 LTC1418ACG#TRPBF reliable?
The price and inventory of LTC1418ACG#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1418ACG#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1418ACG#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1418ACG#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1418ACG#TRPBF?
LTC1418ACG#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1418ACG#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 LTC1418ACG#TRPBF?
For technical support, including LTC1418ACG#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1418ACG#TRPBF requirements.
6.How does Aetrix verify that LTC1418ACG#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1418ACG#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 LTC1418ACG#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1418ACG#TRPBF?
All LTC1418ACG#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1418ACG#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 LTC1418ACG#TRPBF part is unused and in its original packaging.
Return procedure for LTC1418ACG#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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