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Analog Devices Inc. LTC1414CGN#PBF
- Part No.:
- LTC1414CGN#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC1414CGN#PBF.pdf
- Description:
- IC ADC 14BIT SAR 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:277
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Product details
Overview
LTC1414CGN#PBF from Analog Devices (formerly Linear Technology) is a 14-bit, 2.2 Msps successive-approximation ADC with ±2.5 V bipolar differential input range, internal 2.5 V reference, and 80 dB S/(N + D) at 100 kHz - used in high-speed data acquisition systems requiring precision timing and low distortion.
For engineers reviewing the LTC1414CGN#PBF datasheet, LTC1414CGN#PBF pinout, LTC1414CGN#PBF application, or LTC1414CGN#PBF equivalent, key selection criteria include Nyquist-rate spectral purity (78 dB S/(N + D) at 1.1 MHz), absence of pipeline delay, ±5 V dual-supply operation, and 28-pin narrow SSOP package compatibility with mixed-signal PCB layouts.
Technical Context
The LTC1414CGN#PBF implements a fully integrated successive-approximation register (SAR) architecture with on-chip sample-and-hold, precision bandgap reference, and internal clock - eliminating external timing components. Its differential capacitive DAC and zeroing-switch topology enable true bipolar input acquisition without level-shifting circuitry.
It supports both single-ended (AIN– grounded) and differential analog inputs up to 40 MHz full-power bandwidth, with 70 dB common-mode rejection maintained through 1 MHz. Conversion is initiated by a falling edge on CONVST, and BUSY asserts low for 220–400 ns while conversion completes - with no latency between acquisition and output latching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with no missing codes - guarantees monotonic transfer function for control-loop feedback and metrology applications. |
| Sampling Rate | 2.2 Msps maximum - enables real-time capture of signals up to 1.1 MHz (Nyquist) without aliasing in baseband systems. |
| S/(N + D) | 80 dB at 100 kHz, 78 dB at 1.1 MHz - defines usable dynamic range for FFT-based spectrum analysis and digital oscilloscope front-ends. |
| Input Range | ±2.5 V differential - eliminates need for rail-to-rail op amps or DC biasing networks in sensor interface designs. |
| Power Dissipation | 175 mW on ±5 V supplies - enables thermal management in dense mixed-signal boards without forced air cooling. |
| Acquisition Time | 40–100 ns - determines minimum source impedance compatibility; supports direct drive from low-Z amplifiers like LT1227 without external buffering. |
| Aperture Jitter | 3 ps RMS - limits sampling uncertainty to <0.01 LSB at 1 MHz input, critical for undersampling RF applications. |
Pinout & Package
Package: 28-lead narrow-body SSOP (GN), 5.6 mm × 10.2 mm, 0.635 mm pitch, RoHS-compliant, moisture-sensitive level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN+ (1), AIN– (2) | Differential analog input pair | Accepts ±2.5 V full-scale differential signal; common-mode voltage independent of conversion accuracy (INL/DNL stable); 70 dB CMRR up to 1 MHz. |
| VREF (3), REFCOMP (4) | Internal 2.5 V reference output & compensation node | VREF provides buffered 2.5 V reference; REFCOMP requires ≥10 µF ceramic + 0.1 µF ceramic bypass to AGND for stability and noise reduction. |
| AGND (5), DGND (23), OGND (14) | Analog, digital, and output driver ground returns | Must be tied together at single point near AVDD/VSS bypass caps; separates noise paths for SAR core, logic, and parallel bus drivers. |
| D13–D0 (6–13, 15–20) | 14-bit parallel output bus (MSB to LSB) | Two's complement format; outputs valid after BUSY goes high; no pipeline delay - data reflects exact sample time of CONVST edge. |
| BUSY (25), CONVST (24) | Conversion status flag and start trigger | BUSY low = conversion in progress; CONVST active-low edge initiates acquisition - timing-critical for synchronous sampling across multiple ADCs. |
| AVDD (28), VSS (26), DVDD (22), OVDD (21) | Supply rails for analog core, negative supply, digital logic, and output drivers | AVDD/VSS = ±5 V for SAR and reference; DVDD/OVDD = +5 V for logic and drivers; all require local 10 µF + 0.1 µF bypassing to AGND. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Output data reflects the exact sample captured at CONVST edge - essential for closed-loop control and time-of-flight measurement where deterministic latency is required. |
| Integrated 2.5 V reference | Factory-trimmed ±0.8% initial accuracy, ±15 ppm/°C tempco - eliminates external reference IC and reduces BOM count in portable instrumentation. |
| 40 MHz full-power bandwidth | Supports undersampling of IF signals up to 40 MHz - enables direct digitization of intermediate frequencies in communications receivers without downconversion. |
| 70 dB CMRR at 1 MHz | Rejects ground-loop noise and EMI coupling in industrial sensor interfaces - allows use in noisy PLC backplanes without differential line drivers. |
| ±2.5 V bipolar input range | Matches standard op amp output swing; avoids level-shifting circuitry and associated gain/offset errors in strain-gauge or thermocouple front-ends. |
Applications
| Telecommunications Baseband | Digital Oscilloscope Front-End |
|---|---|
Use Scenario: Digitizing I/Q baseband signals from quadrature demodulators in cellular infrastructure equipment. IC Role / Device Role / Timing Role: High-fidelity 14-bit sampling ADC capturing 0–1.1 MHz complex waveforms with minimal harmonic distortion. Use Value: 95 dB SFDR at 100 kHz enables clean separation of adjacent channel interference in LTE/WCDMA receivers. | Use Scenario: Real-time waveform capture in portable 100 MHz bandwidth oscilloscopes with 2.2 Msps deep memory sampling. IC Role / Device Role / Timing Role: Single-shot acquisition ADC with deterministic 220 ns conversion time and no pipeline latency. Use Value: 80 dB S/(N + D) preserves small-signal detail in 50 Ω probe interfaces without post-processing averaging. |
| Multiplexed Sensor Data Acquisition | Spectrum Analyzer Intermediate Frequency Stage |
Use Scenario: Simultaneous sampling of 8-channel industrial sensors (RTDs, load cells) using analog multiplexer and shared reference. IC Role / Device Role / Timing Role: Precision SAR ADC accepting ±2.5 V differential inputs with 0.75 LSB integral linearity error. Use Value: Eliminates need for per-channel op amp buffers due to 40 ns acquisition time and low input leakage (±1 µA). | Use Scenario: Digitizing 70 MHz IF output from superheterodyne receiver for FFT-based spectral display. IC Role / Device Role / Timing Role: Undersampling ADC operating at 2.2 Msps to capture 70 MHz band with alias folding into baseband. Use Value: 40 MHz full-power bandwidth and 3 ps aperture jitter maintain ENOB >12 at 70 MHz input via bandpass sampling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9240ASTZ | 14-bit, 10 Msps, LVDS output, 3.3 V single supply - higher speed but requires external reference and clock distribution. | Used in high-throughput radar digitizers; not drop-in due to different pinout, supply scheme, and serial interface. | Select when system demands >2.2 Msps and can accommodate LVDS layout constraints and external timing. |
| MAX1186ETM+ | 14-bit, 2 Msps, internal reference, SPI interface, 3.3 V supply - lower power (125 mW), smaller 48-pin TQFN package. | Preferred in battery-powered handheld test equipment; lacks parallel bus and ±5 V support. | Select for space-constrained, low-voltage embedded systems where SPI control suffices and ±5 V rails are unavailable. |
Compared with AD9240ASTZ and MAX1186ETM+, the LTC1414CGN#PBF uniquely delivers 2.2 Msps parallel-output performance with integrated ±5 V supplies, internal reference, and zero-latency data - making it optimal for legacy microprocessor bus interfacing and cost-sensitive high-precision acquisition where layout simplicity and supply flexibility are prioritized.
Availability
LTC1414CGN#PBF is available at Aetrix Electronics and suitable for telecommunications baseband digitization, digital oscilloscope front-ends, and multiplexed sensor data acquisition systems requiring stable component supply across long production lifecycles.
Supply support for LTC1414CGN#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 semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC1414CGN#PBF belongs to ADI's legacy Linear Technology precision data converter product line, designed specifically for high-dynamic-range, low-latency sampling in test & measurement, medical imaging, and communications infrastructure where deterministic timing and spectral purity are critical.
FAQ
What is the absolute maximum supply voltage rating for the LTC1414CGN#PBF?
The LTC1414CGN#PBF has an absolute maximum positive supply voltage (AVDD/DVDD/OVDD) of 6 V and negative supply voltage (VSS) of –6 V, with total supply voltage (VDD to VSS) limited to 12 V. Exceeding these ratings may cause permanent damage. Recommended operating range is ±4.75 V to ±5.25 V for optimal performance and thermal stability.
Does the LTC1414CGN#PBF require an external clock source?
No, the LTC1414CGN#PBF contains a fully integrated internal clock and does not require an external clock source. Conversion timing is controlled solely by the CONVST signal - its falling edge initiates acquisition and conversion. The internal oscillator ensures consistent 2.2 Msps operation without external crystal or oscillator components.
Can the LTC1414CGN#PBF operate with a 3.3 V digital interface?
Yes - the LTC1414CGN#PBF supports optional 3 V logic levels via the OVDD pin (Pin 21). When driving 3 V logic, OVDD must be connected to the 3 V supply rail (not AVDD or DVDD), and output voltage levels will comply with 3 V logic thresholds (VOH ≥ 2.4 V, VOL ≤ 0.4 V). DVDD remains at +5 V for internal logic operation.
What is the purpose of the REFCOMP pin on the LTC1414CGN#PBF?
The REFCOMP (Pin 4) is the compensation node for the internal reference amplifier. It must be bypassed to AGND with ≥10 µF ceramic (or tantalum) in parallel with 0.1 µF ceramic to ensure stability and minimize reference noise. Omitting this bypass causes reference oscillation and degraded S/(N + D) performance, especially above 100 kHz input frequencies.
How is offset error calibrated in the LTC1414CGN#PBF?
Offset error in the LTC1414CGN#PBF is calibrated by applying –152 µV (–0.5 LSB) to AIN+ and adjusting the offset voltage applied to AIN– until the output code toggles between 0x0000 and 0x3FFF. This procedure nulls bipolar zero error before full-scale adjustment and is specified in the Applications Information section of the official datasheet.
LTC1414CGN#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 2.2M
- Number of Inputs:
- 1
- Input Type:
- Differential, Single Ended
- Data Interface:
- Parallel
- 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
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 28-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1414CGN#PBF FAQ
1.How can I place an order for LTC1414CGN#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1414CGN#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 LTC1414CGN#PBF reliable?
The price and inventory of LTC1414CGN#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1414CGN#PBF is usually 5 days.
3.What payment methods are accepted for LTC1414CGN#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1414CGN#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1414CGN#PBF?
LTC1414CGN#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1414CGN#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 LTC1414CGN#PBF?
For technical support, including LTC1414CGN#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1414CGN#PBF requirements.
6.How does Aetrix verify that LTC1414CGN#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1414CGN#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 LTC1414CGN#PBF meets industry standards.
7.What is the process for return or replacement of LTC1414CGN#PBF?
All LTC1414CGN#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1414CGN#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 LTC1414CGN#PBF part is unused and in its original packaging.
Return procedure for LTC1414CGN#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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