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Analog Devices Inc. LTC1419ACSW#PBF
- Part No.:
- LTC1419ACSW#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LTC1419ACSW#PBF.pdf
- Description:
- IC ADC 14BIT SAR 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,681
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Product details
Overview
LTC1419ACSW#PBF from Analog Devices (formerly Linear Technology) is a 14-bit, 800ksps successive-approximation ADC with true differential inputs, internal 2.5V reference, and ±2.5V bipolar input range. It delivers 81.5dB S/(N+D) at 100kHz, 93dB THD, and operates from ±5V supplies with 150mW typical power dissipation. Used in high-speed data acquisition systems requiring precise analog-to-digital conversion without pipeline delay.
For engineers reviewing the LTC1419ACSW#PBF datasheet, LTC1419ACSW#PBF pinout, LTC1419ACSW#PBF application, or LTC1419ACSW#PBF equivalent, key selection factors include its 20MHz full-power bandwidth, no missing codes guarantee, Nap/Sleep shutdown modes, 28-pin SO package compatibility, and µP-compatible parallel 14-bit output with BUSY/CONVST control interface.
Technical Context
The LTC1419ACSW#PBF implements a capacitor-based successive approximation register (SAR) architecture with integrated differential sample-and-hold, eliminating pipeline latency and ensuring deterministic conversion timing. Its internal 2.5V bandgap reference features ±15ppm/°C tempco and is buffered to VREF (Pin 3) and REFCOMP (Pin 4) for external compensation.
Control logic supports asynchronous conversion initiation via CONVST falling edge and status indication via BUSY output, enabling direct interfacing with microprocessors, DSPs, and FIFOs. The 14-bit parallel output uses two's complement format with three-state drivers enabled by CS and RD, and supports both single-ended (–AIN grounded) and fully differential input configurations up to 20MHz bandwidth.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with guaranteed no missing codes - ensures monotonic transfer function for precision measurement applications. |
| Sampling Rate | 800ksps maximum - supports real-time digitization of signals up to 400kHz Nyquist frequency. |
| S/(N + D) | 81.5dB at 100kHz - enables >13.2 effective bits for low-noise signal capture in spectrum analysis. |
| THD | –93dB at 100kHz - minimizes harmonic distortion in high-fidelity digital signal processing chains. |
| Input Range | ±2.5V differential - rejects common-mode noise while supporting rail-to-rail common-mode voltage up to ±5V. |
| Power Dissipation | 150mW at 800ksps - balances speed and efficiency for embedded instrumentation without active cooling. |
| Full-Power Bandwidth | 20MHz - allows accurate undersampling of RF and IF signals beyond baseband. |
| Shutdown Modes | Nap (1.5mA) and Sleep (250µA) - extends battery life in portable test equipment between acquisitions. |
Pinout & Package
Package: 28-lead plastic SO (Small Outline), surface-mount, 300 mil width. Pin pitch: 0.050 inch. RoHS-compliant lead-free finish (#PBF).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +AIN (1) | Differential analog input positive | Accepts ±2.5V signal; sampled simultaneously with –AIN for common-mode rejection. |
| –AIN (2) | Differential analog input negative | Enables true differential acquisition; common-mode voltage range extends to AVDD/AVSS rails. |
| VREF (3) | 2.5V reference output | Internally trimmed bandgap reference; bypass with 1µF to AGND for stability and noise reduction. |
| REFCOMP (4) | Reference amplifier compensation | Requires ≥10µF capacitor to AGND; stabilizes internal reference amplifier loop. |
| AGND (5) | Analog ground | Must be tied to DGND at single point; separates analog return path from digital switching noise. |
| D13–D6 (6–13) | MSB-aligned parallel data outputs | Three-state, 2's complement format; driven only when CS and RD are low. |
| DGND (14) | Digital ground | Internal logic ground; connected externally to AGND at system star point. |
| D5–D0 (15–20) | LSB-aligned parallel data outputs | Completes 14-bit bus; same timing and drive characteristics as D13–D6. |
| SHDN (21) | Power shutdown control | Active-low; combined with CS selects Nap (CS=0) or Sleep (CS=1) mode. |
| RD (22) | Data read enable | Active-low; enables output drivers after BUSY goes high to latch valid conversion result. |
| CONVST (23) | Conversion start trigger | Falling edge initiates SAR cycle; must meet t2 setup time relative to CS↓. |
| CS (24) | Chip select | Active-low; gates CONVST/RD recognition and determines shutdown mode with SHDN. |
| BUSY (25) | Conversion status indicator | Active-low open-drain output; data valid on rising edge; used for handshaking with µP/DSP. |
| VSS (26) | Negative supply (–5V) | Bypass with 10µF tantalum || 0.1µF ceramic to AGND; critical for analog performance. |
| DVDD (27) | Digital +5V supply | Shorted internally to AVDD; decoupled separately per supply domain best practice. |
| AVDD (28) | Analog +5V supply | Bypass with 10µF tantalum || 0.1µF ceramic to AGND; isolates analog supply from digital noise. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Successive approximation architecture delivers deterministic 1.15µs max conversion time - essential for real-time closed-loop control. |
| True differential input | 60dB common-mode rejection up to 100kHz - eliminates ground loops and enables direct sensor interfacing without level-shifting. |
| Internal 2.5V reference | ±15ppm/°C tempco and ±20LSB full-scale error - reduces BOM count and improves system accuracy vs external references. |
| Two shutdown modes | Nap mode (1.5mA) enables sub-microsecond wake-up; Sleep mode (250µA) maximizes battery runtime in portable DAQ. |
| 20MHz full-power bandwidth | Supports undersampling of IF signals up to 20MHz - enables software-defined radio and broadband spectrum monitoring. |
| µP-compatible parallel interface | Asynchronous CONVST/BUSY handshake and three-state outputs - simplifies integration with legacy 8051, ARM, or FPGA controllers. |
Applications
| Telecommunications Test Equipment | Digital Signal Processing Front-End |
|---|---|
Use Scenario: Digitizing RF intermediate frequency (IF) signals in vector signal analyzers and protocol testers. IC Role / Device Role / Timing Role: High-speed ADC capturing 375kHz–400kHz IF waveforms with <80dB S/(N+D) at Nyquist for EVM calculation. Use Value: 20MHz full-power bandwidth enables accurate undersampling; 93dB THD preserves modulation fidelity for QAM-64/256 analysis. | Use Scenario: Real-time acquisition of audio or vibration sensor outputs feeding FIR filters in industrial condition monitoring. IC Role / Device Role / Timing Role: Precision SAR ADC providing 14-bit resolution and no missing codes for FFT-based spectral decomposition. Use Value: ±2.5V differential input rejects motor-drive EMI; Nap mode reduces average power during idle periods between bursts. |
| Multiplexed Data Acquisition Systems | Imaging System Digitization |
Use Scenario: Channelized sensor array digitization in environmental monitoring stations with thermocouples and strain gauges. IC Role / Device Role / Timing Role: ADC with programmable shutdown managing power across 8–16 channels via multiplexer sequencing. Use Value: Sleep mode draws only 250µA between conversions; 81.5dB S/(N+D) ensures >13-bit ENOB for calibrated temperature readings. | Use Scenario: Converting analog outputs from CCD/CMOS line-scan sensors in medical X-ray or document scanners. IC Role / Device Role / Timing Role: High-linearity ADC sampling at 800ksps to reconstruct 1024-pixel lines within tight timing windows. Use Value: No pipeline delay guarantees pixel-accurate timing alignment; differential inputs suppress clock feedthrough noise from scanner motors. |
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 |
|---|---|---|---|
| ADS8515IPW | 16-bit, 250ksps, SPI interface, external reference required; lower THD (–100dB) but slower rate. | Better DC accuracy and noise floor for precision instrumentation; lacks parallel bus and internal reference. | Select when resolution >14-bit and throughput <300ksps suffices; requires external ref design and SPI controller. |
| MAX1190ECM+ | 14-bit, 1Msps, single-ended input only, 3.3V supply, no internal reference; higher power (220mW). | Higher speed for streaming applications; incompatible supply and reference architecture. | Select for 1Msps single-ended systems powered from 3.3V; not drop-in due to pinout, voltage, and reference differences. |
Compared with ADS8515IPW and MAX1190ECM+, the LTC1419ACSW#PBF uniquely combines internal 2.5V reference, ±5V dual-supply operation, true differential inputs, and µP-compatible parallel interface at 800ksps - making it optimal for legacy industrial DAQ upgrades where board space, BOM count, and timing determinism are critical.
Availability
LTC1419ACSW#PBF is available at Aetrix Electronics and suitable for telecommunications test equipment, digital signal processing front-ends, and multiplexed data acquisition systems requiring stable component supply across extended production lifecycles.
Supply support for LTC1419ACSW#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 LTC1419ACSW#PBF belongs to ADI's legacy Linear Technology precision data converter family, designed specifically for high-speed, low-distortion sampling in instrumentation, test, and measurement applications where deterministic timing and minimal external components are essential.
FAQ
What is the operating temperature range for the LTC1419ACSW#PBF?
The LTC1419ACSW#PBF is rated for 0°C to 70°C ambient operation (Commercial grade). This is indicated by the "C" suffix in the part number. The device achieves full specified performance-including 81.5dB S/(N+D) and ±2LSB integral linearity-across this entire range when properly decoupled and laid out per the datasheet layout guidelines.
Does the LTC1419ACSW#PBF require an external clock source?
No, the LTC1419ACSW#PBF does not require an external clock. It contains a fully integrated internal oscillator that drives the successive approximation process at the rated 800ksps sampling rate. External timing is managed solely through the CONVST and RD control signals; no clock input pin exists on the device.
Can the LTC1419ACSW#PBF operate with a single +5V supply?
No, the LTC1419ACSW#PBF requires dual ±5V supplies (AVDD = DVDD = +5V, VSS = –5V) as specified in its absolute maximum ratings and recommended operating conditions. Attempting single-supply operation violates the –6V minimum rating on VSS and will damage the device or cause undefined behavior.
How does the Nap mode differ from Sleep mode in the LTC1419ACSW#PBF?
Nap mode (SHDN = 0V, CS = 0V) draws ~1.5mA and allows wake-up in ≤400ns after SHDN rises, enabling rapid resumption of sampling. Sleep mode (SHDN = 0V, CS = 5V) draws only 250µA but requires longer wake-up latency; both modes retain register state and reference bias, unlike full power-down.
Is the LTC1419ACSW#PBF pin-compatible with other members of the LTC1419 family?
Yes, the LTC1419ACSW#PBF shares identical pinout and footprint with all 28-pin SO variants in the LTC1419 family (e.g., LTC1419CSW, LTC1419AISW), differing only in temperature grade and initial accuracy specifications. The "A" grade denotes improved linearity (±0.6LSB INL typ), but mechanical and electrical interface remains identical.
LTC1419ACSW#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:
- -
LTC1419ACSW#PBF FAQ
1.How can I place an order for LTC1419ACSW#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1419ACSW#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 LTC1419ACSW#PBF reliable?
The price and inventory of LTC1419ACSW#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1419ACSW#PBF is usually 5 days.
3.What payment methods are accepted for LTC1419ACSW#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1419ACSW#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1419ACSW#PBF?
LTC1419ACSW#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1419ACSW#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 LTC1419ACSW#PBF?
For technical support, including LTC1419ACSW#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1419ACSW#PBF requirements.
6.How does Aetrix verify that LTC1419ACSW#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1419ACSW#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 LTC1419ACSW#PBF meets industry standards.
7.What is the process for return or replacement of LTC1419ACSW#PBF?
All LTC1419ACSW#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1419ACSW#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 LTC1419ACSW#PBF part is unused and in its original packaging.
Return procedure for LTC1419ACSW#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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