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Analog Devices Inc. LTC1419CSW#PBF
- Part No.:
- LTC1419CSW#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LTC1419CSW#PBF.pdf
- Description:
- IC ADC 14BIT SAR 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,223
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Product details
Overview
LTC1419CSW#PBF from Analog Devices (formerly Linear Technology) is a 14-bit, 800ksps successive-approximation ADC with true differential inputs, ±2.5V bipolar input range, 20MHz full-power bandwidth, and integrated 2.5V reference. It delivers 81.5dB S/(N + D) and –93dB THD at 100kHz, operates from ±5V supplies, and supports Nap/Sleep shutdown modes for low-power systems in high-speed data acquisition.
For engineers reviewing the LTC1419CSW#PBF datasheet, LTC1419CSW#PBF pinout, LTC1419CSW#PBF application, or LTC1419CSW#PBF equivalent, key selection considerations include its no-pipeline-delay parallel interface, 60dB common-mode rejection, 90ns minimum acquisition time, 28-pin SSOP package, and compatibility with microprocessor/DSP timing via BUSY/CONVST/RD signals.
Technical Context
The LTC1419CSW#PBF implements a capacitor-based successive-approximation architecture with an internal sample-and-hold and precision bandgap reference. Its differential input stage acquires signals up to 20MHz while rejecting common-mode noise, and conversion is initiated by a falling edge on CONVST with result validity signaled by BUSY rising edge.
It uses a 2's complement 14-bit parallel output format with three-state drivers controlled by CS and RD. Power management includes two digitally selectable shutdown modes: Nap mode (1.5mA supply current) and Sleep mode (250µA positive supply current), both activated via SHDN low with CS state determining mode selection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with guaranteed no missing codes - ensures monotonicity and integrity of full-scale transitions. |
| Sampling Rate | 800ksps maximum - supports real-time capture of signals up to 400kHz Nyquist frequency. |
| S/(N + D) | 81.5dB at 100kHz - enables >13.2 effective bits for high-fidelity signal reconstruction. |
| THD | –93dB at 100kHz - minimizes harmonic contamination in spectral analysis applications. |
| Input Range | ±2.5V differential - allows direct connection to op-amp buffers without level-shifting circuitry. |
| Reference | Internal 2.5V ±15ppm/°C - eliminates external reference component count while maintaining temperature stability. |
| Power Dissipation | 150mW typical at full speed - balances performance and thermal load in dense PCB layouts. |
Pinout & Package
The LTC1419CSW#PBF is housed in a 28-lead plastic SSOP (Small Outline Package) with 0.65mm lead pitch, optimized for surface-mount assembly and thermal performance (θJA = 130°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +AIN (Pin 1) | Differential analog input positive | Accepts signal up to ±2.5V relative to –AIN; sampled simultaneously with –AIN for common-mode rejection. |
| –AIN (Pin 2) | Differential analog input negative | Completes differential pair; common-mode voltage range extends rail-to-rail within AVDD/AVSS limits. |
| VREF (Pin 3) | 2.5V reference output | Provides buffered internal reference; requires 1µF bypass to AGND for noise suppression. |
| REFCOMP (Pin 4) | Reference amplifier compensation | Stabilizes internal reference amplifier; must be bypassed with ≥10µF capacitor to AGND. |
| AGND (Pin 5) | Analog ground return | Low-impedance reference for analog circuitry; must be tied to DGND at single point. |
| D13–D6 (Pins 6–13) | MSB-aligned parallel data outputs | Three-state 2's complement outputs; driven only when CS and RD are low. |
| DGND (Pin 14) | Digital ground return | Return path for digital logic; connected to AGND at system star point to minimize noise coupling. |
| D5–D0 (Pins 15–20) | LSB-aligned parallel data outputs | Completes 14-bit bus; same timing and drive behavior as D13–D6. |
| SHDN (Pin 21) | Power shutdown control | Active-low input; selects Nap (CS=0) or Sleep (CS=1) mode when asserted. |
| RD (Pin 22) | Data read strobe | Enables output drivers when CS is low; data valid on BUSY rising edge. |
| CONVST (Pin 23) | Conversion start trigger | Falling-edge sensitive; initiates SAR cycle and resets successive approximation register. |
| CS (Pin 24) | Chip select | Active-low enable for control inputs (CONVST, RD); determines shutdown mode with SHDN. |
| BUSY (Pin 25) | Conversion status indicator | Active-low open-drain output; goes high at end of conversion to signal data readiness. |
| VSS (Pin 26) | Negative analog/digital supply | –5V rail; requires 10µF tantalum + 0.1µF ceramic bypass to AGND. |
| DVDD (Pin 27) | Digital positive supply | +5V rail; shorted internally to AVDD; bypassed identically to VSS. |
| AVDD (Pin 28) | Analog positive supply | +5V rail; bypassed with 10µF tantalum + 0.1µF ceramic to AGND. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Immediate availability of conversion result after BUSY rises - simplifies timing-critical FIFO/DSP interfacing. |
| True differential input stage | 60dB common-mode rejection up to 100kHz - enables ground-loop elimination and noise-immune sensor measurements. |
| Two shutdown modes | Nap mode (1.5mA) enables fast wake-up (<400ns); Sleep mode (250µA) maximizes battery life in portable instrumentation. |
| Internal 2.5V reference | ±15ppm/°C tempco and ±20mV initial accuracy - reduces BOM count and layout area vs. discrete reference solutions. |
| 20MHz full-power bandwidth | Supports undersampling of RF/IF signals beyond Nyquist - useful in spectrum analyzers and communications receivers. |
Applications
| Telecommunications Baseband Processing | Digital Signal Processing Systems |
|---|---|
Use Scenario: Digitizing I/Q baseband signals in cellular infrastructure transceivers operating at intermediate frequencies up to 400kHz. IC Role / Device Role / Timing Role: High-speed, low-distortion ADC capturing complex waveforms with minimal harmonic generation for accurate FFT analysis. Use Value: 81.5dB S/(N + D) and –93dB THD preserve modulation fidelity, enabling 64-QAM compliance in LTE front-ends. | Use Scenario: Real-time acquisition of sensor data in FPGA-based DSP pipelines for vibration monitoring and predictive maintenance. IC Role / Device Role / Timing Role: Parallel-output ADC synchronized to FPGA clock domain via BUSY/CONVST handshake for deterministic latency. Use Value: No pipeline delay and 950ns conversion time ensure sub-microsecond sampling jitter, critical for phase-coherent multi-channel analysis. |
| Multiplexed Data Acquisition Systems | Imaging Systems |
Use Scenario: Channel-scanning in industrial PLC analog input modules with 16+ sensor channels multiplexed through precision op-amps. IC Role / Device Role / Timing Role: High-linearity ADC accepting switched differential inputs with 60dB CMRR to reject crosstalk between adjacent channels. Use Value: ±0.6 LSB integral linearity error and ±0.5 LSB differential linearity error maintain measurement consistency across all channels. | Use Scenario: Capturing line-scan CCD output in medical X-ray detectors requiring wide dynamic range and low noise floor. IC Role / Device Role / Timing Role: Low-noise ADC digitizing low-light analog video signals with 20MHz bandwidth to support high-resolution spatial sampling. Use Value: 14-bit resolution with no missing codes preserves subtle contrast gradients in diagnostic imaging, avoiding false artifact generation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed, high-resolution ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8505IPW | 16-bit, 250ksps, single-ended input, external reference required | Lower throughput but higher resolution; suited for precision DC-coupled measurements rather than AC spectral analysis | Select when absolute accuracy > resolution speed; requires external reference design and level-shifting for bipolar inputs. |
| MAX1186ETL+ | 14-bit, 1.5Msps, serial LVDS interface, no internal reference | Higher sample rate but serial output increases FPGA resource usage; lacks integrated reference and differential input stage | Select for space-constrained designs needing higher throughput; adds complexity in clocking, serialization, and reference sourcing. |
Compared with ADS8505IPW and MAX1186ETL+, the LTC1419CSW#PBF offers optimal balance of 800ksps speed, integrated 2.5V reference, true differential inputs, and parallel μP interface-making it ideal for cost-sensitive, medium-throughput instrumentation where board area and design simplicity are prioritized.
Availability
LTC1419CSW#PBF is available at Aetrix Electronics and suitable for telecommunications baseband processing, digital signal processing systems, and multiplexed data acquisition systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LTC1419CSW#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 LTC1419CSW#PBF belongs to ADI's legacy Linear Technology precision data converter family, designed specifically for high-speed, high-dynamic-range applications demanding low distortion, excellent linearity, and simplified system integration.
FAQ
What is the maximum sampling frequency supported by the LTC1419CSW#PBF?
The LTC1419CSW#PBF supports a maximum sampling frequency of 800ksps, as specified in its timing characteristics table. This rate is achievable across the full operating temperature range (0°C to 70°C for the 'C' grade), with conversion time bounded at 950–1150ns and acquisition time at 90–300ns. At this rate, the device maintains 81.5dB S/(N + D) at 100kHz input and 80dB at the Nyquist frequency of 400kHz, confirming sustained performance at full throughput.
Does the LTC1419CSW#PBF require an external reference voltage?
No, the LTC1419CSW#PBF does not require an external reference voltage because it integrates a factory-trimmed 2.5V bandgap reference with ±15ppm/°C temperature coefficient and ±20mV initial accuracy. The VREF pin provides access to this internal reference, and REFCOMP must be bypassed with ≥10µF capacitance to AGND for stability. An external reference can be used by overdriving VREF, but it is optional-not mandatory-for standard operation.
How does the differential input architecture of the LTC1419CSW#PBF improve noise immunity?
The LTC1419CSW#PBF achieves 60dB analog input common-mode rejection ratio (CMRR) by using a matched differential sample-and-hold circuit that acquires +AIN and –AIN simultaneously. This topology cancels noise and interference common to both inputs-such as ground loops, EMI pickup, or power supply ripple-without requiring external instrumentation amplifiers. CMRR remains effective up to 100kHz, directly improving signal integrity in electrically noisy industrial environments.
What are the power consumption differences between Nap and Sleep modes on the LTC1419CSW#PBF?
In Nap mode (SHDN = 0V, CS = 0V), the LTC1419CSW#PBF draws 1.5mA from the positive supply and 100µA from the negative supply, resulting in ~7.5–12mW total dissipation. In Sleep mode (SHDN = 0V, CS = 5V), it consumes 250µA from DVDD and 1µA from VSS, reducing total power to ~1.2mW. Nap mode enables wake-up in under 400ns, while Sleep mode prioritizes ultra-low quiescent current for battery-powered standby operation.
Can the LTC1419CSW#PBF interface directly with a microcontroller without level-shifting?
Yes, the LTC1419CSW#PBF interfaces directly with 5V-tolerant microcontrollers: its digital inputs accept VIH ≥ 2.4V and VIL ≤ 0.8V (at VDD = 4.75–5.25V), and its three-state CMOS outputs drive VOH ≥ 4.0V (IO = –200µA) and VOL ≤ 0.10V (IO = 1.6mA). With DVDD tied to the MCU's 5V rail and shared DGND/AGND, no level shifters are needed-provided the MCU's I/O pins tolerate ±0.3V beyond supply rails per Absolute Maximum Ratings.
LTC1419CSW#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:
- 14
- Sampling Rate (Per Second):
- 800k
- 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-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1419CSW#PBF FAQ
1.How can I place an order for LTC1419CSW#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1419CSW#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 LTC1419CSW#PBF reliable?
The price and inventory of LTC1419CSW#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1419CSW#PBF is usually 5 days.
3.What payment methods are accepted for LTC1419CSW#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1419CSW#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1419CSW#PBF?
LTC1419CSW#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1419CSW#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 LTC1419CSW#PBF?
For technical support, including LTC1419CSW#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1419CSW#PBF requirements.
6.How does Aetrix verify that LTC1419CSW#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1419CSW#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 LTC1419CSW#PBF meets industry standards.
7.What is the process for return or replacement of LTC1419CSW#PBF?
All LTC1419CSW#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1419CSW#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 LTC1419CSW#PBF part is unused and in its original packaging.
Return procedure for LTC1419CSW#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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