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Analog Devices Inc. LTC1415ISW#PBF
- Part No.:
- LTC1415ISW#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LTC1415ISW#PBF.pdf
- Description:
- IC ADC 12BIT SAR 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,596
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Product details
Overview
LTC1415ISW#PBF from Analog Devices (formerly Linear Technology) is a 12-bit, 1.25 Msps sampling analog-to-digital converter with ±0.35 LSB INL, 72 dB S/(N+D) at 100 kHz, and true differential inputs rejecting common-mode noise up to 60 dB - deployed in high-speed imaging and DSP data acquisition systems.
For engineers reviewing the LTC1415ISW#PBF datasheet, LTC1415ISW#PBF pinout, LTC1415ISW#PBF application, or LTC1415ISW#PBF equivalent, key selection criteria include its 4.096 V full-scale input range, 55 mW active power dissipation, Nap/Sleep shutdown modes, 28-pin SSOP package, and μP-compatible parallel 12-bit output interface with BUSY/CONVST control timing.
Technical Context
The LTC1415ISW#PBF implements a successive-approximation register (SAR) architecture with an integrated differential sample-and-hold, internal 2.500 V bandgap reference, and trimmed clock - enabling single-supply 5 V operation without external timing components. Its 18 MHz analog input bandwidth and 700 ns conversion time support undersampling of signals beyond Nyquist.
It features separate analog (AVDD), digital (DVDD), and output buffer (OVDD) supplies, allowing direct interfacing to 3 V logic via OVDD pin configuration. The differential input stage supports both true differential and single-ended configurations while maintaining ±0.25 LSB DNL and 60 dB DC–1 MHz CMRR.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with no missing codes - guarantees monotonicity and full code coverage for precision measurement. |
| Sample Rate | 1.25 Msps maximum - enables real-time capture of signals up to 625 kHz (Nyquist) with minimal pipeline latency. |
| INL / DNL | ±0.35 LSB / ±0.25 LSB - ensures high linearity for imaging and spectral analysis where code-edge accuracy is critical. |
| S/(N+D) | 72 dB at 100 kHz - delivers 11.7 effective bits for clean signal reconstruction in medium-bandwidth applications. |
| Power Dissipation | 55 mW at full rate; 7.5 mW in Nap mode; 0.01 mW in Sleep - supports battery-sensitive or thermally constrained embedded designs. |
| Input Range | 4.096 V full-scale differential - matches standard 1 mV/LSB scaling and simplifies gain staging with common op amps. |
| Common-Mode Rejection | 60 dB from DC to 1 MHz - suppresses ground loops and noise in industrial sensor interfaces. |
Pinout & Package
The LTC1415ISW#PBF is housed in a 28-lead plastic SSOP (Shrink Small Outline Package) with 0.65 mm lead pitch, optimized for compact PCB layouts and thermal performance (θJA = 130°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +AIN (1) | Differential analog input positive | Accepts 0 V to 4.096 V signal; sampled simultaneously with –AIN for common-mode rejection. |
| –AIN (2) | Differential analog input negative | Completes differential pair; grounding enables single-ended operation with ±0.35 LSB INL maintained. |
| VREF (3) | Internal 2.500 V reference output | Provides buffered bandgap voltage; can be overdriven externally to adjust full-scale range. |
| REFCOMP (4) | Reference amplifier compensation | Requires ≥10 µF bypass to AGND for stability and low-noise reference operation. |
| AGND (5) | Analog ground reference | Must be star-connected to DGND/OGND at single point to minimize digital noise coupling. |
| D11–D0 (6–18) | 12-bit parallel data outputs | Three-state, μP-compatible bus; MSB-first order; OVDD sets output logic level (3 V or 5 V). |
| BUSY (25) | Conversion status indicator | Active-low open-drain signal; rising edge marks valid data ready for latching. |
| CONVST (23) | Conversion start trigger | Falling-edge initiated; minimum pulse width 50 ns; timing-critical for repeatable acquisition. |
| SHDN / NAP/SLP (21,20) | Power management controls | SHDN low + NAP/SLP high → Nap mode (2.3 mA); SHDN low + NAP/SLP low → Sleep (1 µA). |
Key Features
| Feature | Design Value |
|---|---|
| True differential input architecture | Enables >60 dB common-mode noise rejection and rail-to-rail input swing without performance degradation. |
| Integrated 2.500 V temperature-compensated reference | Eliminates external reference IC; factory-trimmed to ±20 mV (±0.8%) and stable to ±15 ppm/°C. |
| Separate OVDD supply pin | Allows direct connection to 3 V microcontrollers or FPGAs without level-shifting circuitry. |
| Nap and Sleep shutdown modes | Reduces idle power by 90% (Nap) or 99.98% (Sleep), enabling adaptive power management in portable systems. |
| No pipeline delay | Delivers first valid conversion result within one sample period - essential for deterministic real-time control loops. |
Applications
| High-Speed Imaging Systems | Digital Signal Processing Front-End |
|---|---|
Use Scenario: Capturing real-time video frames from CCD/CMOS sensors in medical endoscopes or industrial machine vision. IC Role / Device Role / Timing Role: Primary ADC digitizing analog pixel outputs at >1 MSPS with precise timing alignment and low aperture jitter (2 ps RMS). Use Value: ±0.35 LSB INL preserves image fidelity; 72 dB S/(N+D) maintains contrast resolution across 4096 gray levels. | Use Scenario: Digitizing baseband I/Q signals in software-defined radio receivers prior to FPGA-based FFT processing. IC Role / Device Role / Timing Role: High-fidelity analog front-end ADC with differential inputs rejecting RF coupling noise on PCB traces. Use Value: 60 dB CMRR suppresses local oscillator feedthrough; 18 MHz input bandwidth supports IF sampling up to 10 MHz. |
| Multiplexed Data Acquisition | Telecom Line Card Monitoring |
Use Scenario: Scanning multiple sensor channels (temperature, pressure, strain) in programmable logic controller (PLC) backplanes. IC Role / Device Role / Timing Role: Centralized sampling engine triggered by microcontroller CONVST pulses, synchronized across 8–16 channels via analog mux. Use Value: 150 ns acquisition time enables <1 µs per channel settling; Nap mode cuts system standby power between scans. | Use Scenario: Monitoring analog voltage/current parameters on telecom line cards (e.g., -48 V supply rails, laser bias currents). IC Role / Device Role / Timing Role: Precision monitoring ADC interfaced to ARM Cortex-M host via parallel bus with BUSY handshake. Use Value: 4.096 V input range matches standard telecom sensor outputs; ±0.25 LSB DNL ensures accurate fault threshold detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit, ~1 MSPS SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 2.4 Msps, SPI interface, 3.3 V only, no internal reference, 1.5 mW typical power | Requires external reference and level-shifting for 5 V systems; better suited for ultra-low-power portable designs | Select when serial interface and minimal board space outweigh need for parallel throughput and integrated reference. |
| MAX1166BCAP+ | 250 kSPS, internal reference, 2.7–3.6 V supply, 12-bit with ±1 LSB INL, 16-pin QSOP | Lower speed and wider INL spec; lacks Nap/Sleep modes; incompatible pinout and voltage domain | Choose only for cost-sensitive, lower-throughput industrial monitoring where 55 mW dissipation is acceptable but 1.25 Msps is unnecessary. |
Compared with ADS7822U and MAX1166BCAP+, the LTC1415ISW#PBF uniquely combines 1.25 Msps parallel output, integrated 2.5 V reference, 5 V single-supply operation, and dual low-power modes - making it optimal for fixed-function embedded systems requiring deterministic timing and minimal external components.
Availability
LTC1415ISW#PBF is available at Aetrix Electronics and suitable for high-speed imaging systems, digital signal processing front-ends, and multiplexed data acquisition requiring stable component supply across extended temperature ranges (–40°C to +85°C).
Supply support for LTC1415ISW#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 LTC1415ISW#PBF belongs to ADI's legacy Linear Technology precision data conversion product line, engineered specifically for demanding instrumentation and real-time acquisition applications where linearity, noise floor, and deterministic timing are critical.
FAQ
What is the operating temperature range for the LTC1415ISW#PBF?
The LTC1415ISW#PBF is specified for industrial operation from –40°C to +85°C (I-grade), validated across all electrical parameters including INL, S/(N+D), and power consumption. This range supports deployment in harsh environments such as factory automation controllers and outdoor telecom equipment where ambient temperatures exceed commercial limits.
Does the LTC1415ISW#PBF require an external reference?
No - the LTC1415ISW#PBF integrates a factory-trimmed, temperature-compensated 2.500 V bandgap reference accessible at the VREF pin. It can operate with this internal reference alone, or accept an external reference applied to VREF to adjust full-scale range (e.g., for 2.048 V or 3.0 V spans). REF COMP must be bypassed with ≥10 µF to AGND for stability.
How does the Nap mode differ from Sleep mode in the LTC1415ISW#PBF?
Nap mode (SHDN = low, NAP/SLP = high) reduces supply current to ~2 mA with 200 ns wake-up time, preserving internal state for rapid resumption. Sleep mode (SHDN = low, NAP/SLP = low) draws only 1 µA but requires 10 ms wake-up and full reinitialization. Both modes retain pin states and do not reset the device - unlike full power-cycle restart.
Can the LTC1415ISW#PBF interface directly with 3 V logic devices?
Yes - the LTC1415ISW#PBF includes a dedicated OVDD pin (Pin 26) that powers the digital output buffers. Tying OVDD to 3 V configures D11–D0 outputs for 3 V logic levels (VOH ≥ 2.4 V, VOL ≤ 0.4 V), eliminating external level shifters when connecting to 3 V FPGAs, microcontrollers, or ASICs.
What is the significance of the 4.096 V full-scale input range in the LTC1415ISW#PBF?
The 4.096 V full-scale range yields exactly 1 mV per LSB (4096 codes × 1 mV = 4.096 V), simplifying system calibration and matching common DAC outputs and sensor signal chains. It also aligns with standard reference voltages (e.g., 2.5 V × 1.638 gain) and enables direct interfacing with low-noise op amps optimized for this range, minimizing translation errors.
LTC1415ISW#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 1.25M
- 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:
- -40°C ~ 85°C
- Supplier Device Package:
- 28-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1415ISW#PBF FAQ
1.How can I place an order for LTC1415ISW#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1415ISW#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 LTC1415ISW#PBF reliable?
The price and inventory of LTC1415ISW#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1415ISW#PBF is usually 5 days.
3.What payment methods are accepted for LTC1415ISW#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1415ISW#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1415ISW#PBF?
LTC1415ISW#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1415ISW#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 LTC1415ISW#PBF?
For technical support, including LTC1415ISW#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1415ISW#PBF requirements.
6.How does Aetrix verify that LTC1415ISW#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1415ISW#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 LTC1415ISW#PBF meets industry standards.
7.What is the process for return or replacement of LTC1415ISW#PBF?
All LTC1415ISW#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1415ISW#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 LTC1415ISW#PBF part is unused and in its original packaging.
Return procedure for LTC1415ISW#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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