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Analog Devices Inc. LTC1418ACG#PBF
- Part No.:
- LTC1418ACG#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC1418ACG#PBF.pdf
- Description:
- IC ADC 14BIT SAR 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,795
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Product details
Overview
LTC1418ACG#PBF 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 battery-powered data acquisition systems.
For engineers reviewing the LTC1418ACG#PBF datasheet, LTC1418ACG#PBF pinout, LTC1418ACG#PBF application, or LTC1418ACG#PBF equivalent, key selection criteria include unipolar/bipolar input range flexibility (0–4.096V or ±2.048V), dual shutdown modes (Nap/Sleep), differential high-impedance analog inputs, and guaranteed no missing codes over temperature.
Technical Context
The LTC1418ACG#PBF implements a 14-bit capacitive DAC-based successive approximation architecture with internal timing control, eliminating need for external clocks in basic operation. Its sample-and-hold acquires input in ≤1µs and holds during conversion, supporting full 200ksps throughput with tCONV = 3.4–4µs and tACQ = 0.3–1µs.
Digital interface supports both parallel 14-bit output (D13–D0) and serial mode via configurable pins: D0 (EXT/INT) selects internal/external clock source, D3 (SCLK) serves as serial clock input, D1 (DOUT) as serial data output, and D2 (CLKOUT) as clock output - all SPI/MICROWIRE compatible up to 12.5MHz SCLK.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with guaranteed no missing codes over 0°C to 70°C operating range |
| Sampling Rate | 200ksps maximum - enables real-time capture of signals up to 100kHz Nyquist frequency |
| INL / DNL | ±1.25LSB max integral nonlinearity and ±1LSB max differential nonlinearity - ensures accurate DC measurement and monotonicity |
| S/(N + D) | 81.5dB at 97.5kHz input - supports high-fidelity signal digitization in audio and telecom applications |
| Power Dissipation | 15mW typical at 200ksps (unipolar), 21.5mW typical (bipolar) - suitable for thermally constrained portable designs |
| Analog Input Range | 0V to 4.096V (unipolar, 5V supply) or ±2.048V (bipolar, ±5V supply) - matches standard reference scaling for precision measurement |
| Reference | Integrated 2.500V ±20mV (±0.8%) precision reference with ±10ppm/°C tempco - eliminates external reference component count |
Pinout & Package
Package: 28-lead plastic SSOP (G package), 5.6mm × 10.2mm body, 0.635mm pitch, RoHS-compliant lead-free finish (PBF).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN+, AIN– | Differential analog input pair | High-impedance inputs accepting unipolar (0–4.096V) or bipolar (±2.048V) signals; common-mode rejection minimizes noise coupling |
| VREF | 2.5V reference output | Stable internal reference requiring 1µF bypass to AGND; used for ADC core and external circuitry calibration |
| REFCOMP | 4.096V reference bypass node | Supports external 4.096V reference generation when paired with VREF; requires 10µF tantalum + 0.1µF ceramic bypass |
| D13–D0 | Parallel data outputs (14-bit) | Three-state outputs active when CS = RD = LOW; D13 = MSB; SER/PAR pin configures output format |
| SER/PAR | Output mode select | LOW = parallel output enabled; HIGH = serial output enabled (D1/D2/D3/D4/D0 functional) |
| CONVST | Conversion start trigger | Falling-edge sensitive; initiates SAR conversion cycle; must remain low ≥40ns per timing spec |
| BUSY | Conversion status indicator | Active-low open-drain output signaling conversion in progress; used for handshaking with host processor |
| SHDN, CS | Power management controls | SHDN = LOW + CS = LOW → Nap mode (fast wake-up); SHDN = LOW + CS = HIGH → Sleep mode (ultra-low current) |
Key Features
| Feature | Design Value |
|---|---|
| Selectable I/O interface | Hardware-configurable parallel or serial (SPI/MICROWIRE) output reduces host interface complexity and PCB routing overhead |
| Dual shutdown modes | Nap mode (2µA IDD) enables sub-microsecond wake-up; Sleep mode (0.1µA IDD) extends battery life in idle periods |
| Integrated precision reference | 2.500V ±20mV reference with ±10ppm/°C tempco eliminates need for external voltage reference IC or trimming |
| Differential high-Z analog input | Input leakage ≤±1µA and capacitance ≤25pF allow direct connection to high-impedance sensors without buffer amplification |
| Guaranteed no missing codes | Valid across full 0°C to 70°C temperature range - critical for closed-loop control and safety-critical instrumentation |
Applications
| Remote Data Acquisition | Battery-Operated Systems |
|---|---|
Use Scenario: Distributed environmental monitoring nodes collecting temperature, pressure, and humidity via low-power microcontrollers. IC Role / Device Role / Timing Role: Primary analog-to-digital converter acquiring sensor signals at 200ksps with minimal power draw and integrated reference stability. Use Value: 15mW typical power and Nap/Sleep modes extend node lifetime; ±1.25LSB INL ensures calibrated accuracy without field recalibration. | Use Scenario: Portable medical devices such as handheld ECG recorders requiring long runtime from coin-cell or Li-ion batteries. IC Role / Device Role / Timing Role: High-fidelity front-end ADC digitizing biopotential signals with low THD (–94dB) and high SNR (81.5dB) at Nyquist. Use Value: Integrated 2.5V reference and no-missing-codes guarantee eliminate external components and ensure diagnostic reliability across temperature. |
| Digital Signal Processing | Isolated Data Acquisition Systems |
Use Scenario: Industrial motor control systems feeding sampled current/voltage waveforms to FPGA-based observers or FFT engines. IC Role / Device Role / Timing Role: Precision sampling engine synchronizing with PWM timers via CONVST/BUSY handshaking for deterministic latency. Use Value: 3.4µs conversion time and 500ns wake-up from Nap mode enable tight control loop timing; differential input rejects common-mode noise from switching inverters. | Use Scenario: High-voltage grid monitoring units using optocouplers or digital isolators between sensor front-end and MCU side. IC Role / Device Role / Timing Role: Isolated-side ADC converting isolated analog signals with minimal support components due to internal reference and S/H. Use Value: REF COMP pin allows local 4.096V reference generation on isolated side; low 15mW dissipation reduces isolated power budget and thermal stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 14-bit, 200ksps 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 driver amp | Better DC precision but lower speed; suited for static sensor readout, not dynamic waveform capture | Choose ADS8325IPW when ENOB >13.5 bits and sampling rate ≤100ksps suffices; avoid if 200ksps or integrated reference required |
| MAX1166CCM+ | 14-bit, 250ksps, internal reference, parallel/serial output - but only 0°C to 70°C grade and no bipolar input support | Limited to unipolar 0–VREF range; lacks ±2.048V bipolar mode needed for AC-coupled or differential sensor interfaces | Choose MAX1166CCM+ for cost-sensitive unipolar-only applications where bipolar capability is unnecessary |
Compared with ADS8325IPW and MAX1166CCM+, the LTC1418ACG#PBF uniquely combines 200ksps throughput, integrated 2.5V reference, bipolar/unipolar input flexibility, and dual shutdown modes - making it optimal for portable, isolated, or thermally constrained 14-bit data acquisition where system-level component count and power efficiency are critical.
Availability
LTC1418ACG#PBF is available at Aetrix Electronics and suitable for remote data acquisition, battery-operated medical instrumentation, and isolated industrial monitoring requiring stable component supply and long-term lifecycle support.
Supply support for LTC1418ACG#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 legacy Linear precision analog products.
The LTC1418 belongs to Linear's high-performance data acquisition ADC family, designed specifically for low-power, high-accuracy measurement in portable, isolated, and thermally constrained systems where integrated references and flexible I/O reduce system complexity.
FAQ
What is the operating temperature range for the LTC1418ACG#PBF?
The LTC1418ACG#PBF is rated for 0°C to 70°C commercial temperature operation. This grade guarantees ±1.25LSB INL, ±1LSB DNL, and no missing codes across that full range - validated per Linear Technology's original specification and maintained under Analog Devices' product continuity program.
Does the LTC1418ACG#PBF require an external reference?
No, the LTC1418ACG#PBF includes an integrated 2.500V ±20mV precision reference with ±10ppm/°C tempco. It can operate fully self-contained using this internal reference; however, the REF COMP pin allows optional use of an external 4.096V reference for enhanced full-scale accuracy in calibrated systems.
How does the LTC1418ACG#PBF support both unipolar and bipolar input ranges?
The LTC1418ACG#PBF achieves dual-range operation through supply configuration: unipolar 0V to 4.096V input uses VDD = 5V and VSS = 0V; bipolar ±2.048V input uses VDD = +5V and VSS = –5V. The internal reference and analog front-end are designed to scale correctly in either configuration without hardware modification.
What are the key timing requirements for reliable conversion handshaking with the LTC1418ACG#PBF?
Reliable handshaking requires meeting t2 = 40ns (CS↓ to CONVST↓ setup), t6 = 35–70ns (CONVST to BUSY delay), and t10 = 15–30ns (data access after RD↓). BUSY assertion confirms conversion completion, and RD must remain low ≥t12 to maintain valid parallel output - all verified at CL = 25pF load per the LTC1418ACG#PBF datasheet.
Can the LTC1418ACG#PBF be used in SPI master mode?
Yes, the LTC1418ACG#PBF supports SPI master mode in serial configuration: when SER/PAR = HIGH and D0 (EXT/INT) = LOW, the device generates its own conversion clock on D2 (CLKOUT) and drives D1 (DOUT) synchronously with D3 (SCLK) - enabling it to act as SPI master controlling external peripherals or daisy-chained ADCs.
LTC1418ACG#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:
- -
LTC1418ACG#PBF FAQ
1.How can I place an order for LTC1418ACG#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1418ACG#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 LTC1418ACG#PBF reliable?
The price and inventory of LTC1418ACG#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1418ACG#PBF is usually 5 days.
3.What payment methods are accepted for LTC1418ACG#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1418ACG#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1418ACG#PBF?
LTC1418ACG#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1418ACG#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 LTC1418ACG#PBF?
For technical support, including LTC1418ACG#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1418ACG#PBF requirements.
6.How does Aetrix verify that LTC1418ACG#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1418ACG#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 LTC1418ACG#PBF meets industry standards.
7.What is the process for return or replacement of LTC1418ACG#PBF?
All LTC1418ACG#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1418ACG#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 LTC1418ACG#PBF part is unused and in its original packaging.
Return procedure for LTC1418ACG#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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