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Analog Devices Inc. LTC1419AIG#PBF
- Part No.:
- LTC1419AIG#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC1419AIG#PBF.pdf
- Description:
- IC ADC 14BIT SAR 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,375
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Product details
Overview
LTC1419AIG#PBF from Analog Devices (acquired Linear Technology) is a 14-bit, 800ksps successive-approximation ADC with true differential inputs, ±2.5V bipolar input range, 81.5dB S/(N+D) at 100kHz, and no pipeline delay. It integrates a 2.5V internal reference, 20MHz full-power bandwidth, and dual shutdown modes for low-power data acquisition systems in spectrum analysis and imaging.
For engineers reviewing the LTC1419AIG#PBF datasheet, LTC1419AIG#PBF pinout, LTC1419AIG#PBF application, or LTC1419AIG#PBF equivalent, key selection criteria include guaranteed no missing codes, 60dB common-mode rejection, 950–1150ns conversion time, and compatibility with µP/DSP interfaces via BUSY/CONVST/RD control signals.
Technical Context
The LTC1419AIG#PBF implements a capacitor-based successive approximation register (SAR) architecture with an integrated differential sample-and-hold circuit. Its analog front-end supports simultaneous sampling of +AIN and –AIN with 90–300ns acquisition time and 2psRMS aperture jitter.
Digital interface uses 14-bit parallel 2's complement output with three-state drivers controlled by CS, RD, and BUSY. Power management includes Nap mode (1.5mA IDD) and Sleep mode (250µA IDD), both activated via SHDN 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 deterministic code transitions across full input range. |
| Sampling Rate | 800ksps maximum - enables real-time capture of signals up to 400kHz Nyquist frequency. |
| S/(N + D) | 81.5dB at 100kHz input - delivers 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 - supports direct connection to sensor bridges and instrumentation amplifiers without level shifting. |
| Common-Mode Rejection | 60dB - suppresses ground-loop noise and EMI in industrial measurement environments. |
| Conversion Time | 950–1150ns - enables tight timing control in high-throughput µP/DSP interfacing with minimal BUSY assertion latency. |
Pinout & Package
Package: 28-pin SSOP (Small Outline Plastic Package), body size 10.2mm × 5.3mm, pitch 0.65mm, JEDEC MS-012AC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +AIN (Pin 1) | Differential analog input positive | Accepts voltage up to AVDD; sampled simultaneously with –AIN for true differential acquisition. |
| –AIN (Pin 2) | Differential analog input negative | Accepts voltage down to AVSS; common-mode range extends rail-to-rail within supply limits. |
| VREF (Pin 3) | 2.5V internal reference output | Provides buffered 2.500V ±20mV reference; requires 1µF bypass to AGND for stability and noise reduction. |
| REFCOMP (Pin 4) | Reference amplifier compensation node | Must be bypassed with ≥10µF capacitor to AGND; stabilizes internal reference amplifier loop. |
| AGND (Pin 5) | Analog ground reference | Single-point tie point for all analog return paths; must be connected to DGND at one location only. |
| D13–D6 (Pins 6–13) | MSB-aligned parallel data outputs | Three-state 2's complement outputs; driven only when CS = LOW and RD = LOW; D13 = MSB. |
| DGND (Pin 14) | Digital ground reference | Return path for internal logic; tied to AGND externally to minimize digital noise coupling into analog section. |
| D5–D0 (Pins 15–20) | LSB-aligned parallel data outputs | Completes 14-bit bus; D0 = LSB; high-impedance when CS HIGH or RD HIGH. |
| SHDN (Pin 21) | Power shutdown control input | Active-low; selects Nap mode (CS = LOW) or Sleep mode (CS = HIGH); wake-up time 400ns. |
| RD (Pin 22) | Data read strobe input | Active-low; enables output drivers when CS = LOW; data valid on rising edge of BUSY. |
| CONVST (Pin 23) | Conversion start trigger | Falling-edge sensitive; initiates SAR cycle; minimum pulse width 40ns; critical timing window defined in t2/t5 specs. |
| CS (Pin 24) | Chip select / mode selector | Active-low enable for CONVST/RD; determines shutdown mode with SHDN: Nap (CS=LOW), Sleep (CS=HIGH). |
| BUSY (Pin 25) | Conversion status indicator | Active-low open-drain output; goes LOW at CONVST fall; rises when conversion complete and data latched. |
| VSS (Pin 26) | Negative analog/digital supply | –5V nominal (–4.75V to –5.25V); bypass with 10µF tantalum + 0.1µF ceramic to AGND. |
| DVDD (Pin 27) | Digital positive supply | +5V nominal (4.75V to 5.25V); shorted internally to AVDD; bypass as AVDD. |
| AVDD (Pin 28) | Analog positive supply | +5V nominal (4.75V to 5.25V); bypass with 10µF tantalum + 0.1µF ceramic to AGND. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Immediate availability of conversion result after BUSY rise - eliminates FIFO buffering and simplifies real-time control loops. |
| True differential input architecture | Simultaneous sampling of +AIN/–AIN with 20MHz bandwidth - enables rejection of common-mode noise without external instrumentation amps. |
| Internal 2.5V reference with 15ppm/°C tempco | Factory-trimmed bandgap reference - eliminates need for external precision reference in cost-sensitive designs. |
| Dual shutdown modes (Nap/Sleep) | 1.5mA Nap current and 250µA Sleep current - allows dynamic power scaling in battery-powered or thermally constrained systems. |
| 60dB CMRR up to 100kHz | Preserves signal integrity in noisy industrial environments - reduces sensitivity to ground potential differences between sensor and ADC. |
Applications
| Telecommunications Baseband Processing | Digital Signal Processing Front-End |
|---|---|
Use Scenario: Digitizing IF signals in cellular base station receivers prior to FPGA-based demodulation. IC Role / Device Role / Timing Role: High-speed, high-SNR ADC capturing 100kHz–400kHz band-limited waveforms with minimal harmonic distortion. Use Value: 81.5dB S/(N+D) and –93dB THD preserve EVM and adjacent channel leakage ratio (ACLR) in LTE/WCDMA systems. | Use Scenario: Real-time waveform capture for FFT-based spectral analysis in test equipment. IC Role / Device Role / Timing Role: Sampling engine feeding DSP memory buffers with precise 800ksps timing and no pipeline latency. Use Value: Guaranteed no missing codes and 14-bit resolution ensure accurate amplitude and phase representation in frequency-domain computations. |
| Multiplexed Data Acquisition Systems | Imaging System Signal Chain |
Use Scenario: Channel-scanned sensor array digitization in industrial PLC analog input modules. IC Role / Device Role / Timing Role: Precision ADC interfaced to multiplexer with fast acquisition (<300ns) and robust common-mode rejection. Use Value: 60dB CMRR suppresses crosstalk and ground bounce across multiple channels sharing AGND. | Use Scenario: Converting CCD/CMOS sensor outputs in medical ultrasound or digital radiography systems. IC Role / Device Role / Timing Role: Low-noise, low-distortion digitizer handling ±2.5V differential video signals with 20MHz bandwidth. Use Value: Full-power bandwidth supports high-resolution spatial sampling without aliasing artifacts in line-scan imaging. |
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 |
|---|---|---|---|
| AD7865BSZ-1 | 14-bit, 100ksps, single-ended inputs only; no internal reference; requires external 2.5V ref. | Limited to lower throughput and lacks differential input noise rejection capability. | Select when cost sensitivity outweighs speed and noise immunity requirements. |
| MAX1190ECM+ | 14-bit, 1Msps, internal reference; differential inputs; but only 78dB S/(N+D) at 100kHz. | Higher sampling rate but lower dynamic range compromises spectral purity in demanding RF applications. | Choose when maximum throughput is prioritized over SNR/THD performance. |
Compared with AD7865BSZ-1 and MAX1190ECM+, the LTC1419AIG#PBF uniquely balances 800ksps speed, 81.5dB S/(N+D), true differential inputs, and integrated 2.5V reference - making it optimal for noise-critical, medium-throughput acquisition where board space and BOM count matter.
Availability
LTC1419AIG#PBF is available at Aetrix Electronics and suitable for telecommunications baseband processing, digital signal processing front-ends, and multiplexed data acquisition systems requiring stable component supply and long-term industrial lifecycle support.
Supply support for LTC1419AIG#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 technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC1419AIG#PBF belongs to Linear Technology's precision high-speed data converter family, designed specifically for applications demanding high dynamic range, low power, and seamless µP/DSP integration without external support components.
FAQ
What is the operating temperature range for the LTC1419AIG#PBF?
The LTC1419AIG#PBF is rated for –40°C to +85°C industrial temperature operation. This is confirmed by the "I" grade suffix in the part number and specified in the Absolute Maximum Ratings table under Operating Temperature Range. The device maintains full performance across this range, including guaranteed 81.5dB S/(N+D) and ±0.8LSB integral linearity at TA = –40°C and +85°C.
Does the LTC1419AIG#PBF require an external clock source?
No, the LTC1419AIG#PBF does not require an external clock source. It contains a fully integrated internal clock generator that supports its 800ksps sampling rate. The timing is controlled solely by the CONVST signal - a falling edge initiates conversion, and BUSY indicates completion. No external oscillator, crystal, or clock distribution circuitry is needed for basic operation.
Can the LTC1419AIG#PBF operate with a single +5V supply?
No, the LTC1419AIG#PBF requires dual supplies: +5V (AVDD/DVDD) and –5V (VSS). The Absolute Maximum Ratings specify VSS = –6V and total supply voltage (VDD to VSS) = 12V, while recommended operating conditions define VSS = –4.75V to –5.25V. Single-supply operation is not supported; attempting to tie VSS to GND will violate absolute maximum ratings and damage the device.
How does the LTC1419AIG#PBF handle input overvoltage conditions?
The LTC1419AIG#PBF includes internal clamping diodes on analog inputs (+AIN, –AIN) that activate when voltages exceed AVDD or drop below VSS. Per Absolute Maximum Ratings, it can safely handle input currents >100mA beyond rails without latchup. However, sustained overvoltage degrades accuracy and may cause permanent damage; external protection (e.g., series resistors, TVS) is recommended for rugged industrial environments.
What is the purpose of the REFCOMP pin on the LTC1419AIG#PBF?
The REFCOMP pin (Pin 4) is the compensation node for the internal reference amplifier. It must be bypassed to AGND with ≥10µF capacitance (e.g., 10µF tantalum + 0.1µF ceramic) to stabilize the amplifier's feedback loop. Without proper bypassing, the 2.5V reference becomes unstable, causing output drift, increased noise, and degraded S/(N+D) performance - directly impacting LTC1419AIG#PBF accuracy and repeatability.
LTC1419AIG#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):
- 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:
- -40°C ~ 85°C
- Supplier Device Package:
- 28-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1419AIG#PBF FAQ
1.How can I place an order for LTC1419AIG#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1419AIG#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 LTC1419AIG#PBF reliable?
The price and inventory of LTC1419AIG#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1419AIG#PBF is usually 5 days.
3.What payment methods are accepted for LTC1419AIG#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1419AIG#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1419AIG#PBF?
LTC1419AIG#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1419AIG#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 LTC1419AIG#PBF?
For technical support, including LTC1419AIG#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1419AIG#PBF requirements.
6.How does Aetrix verify that LTC1419AIG#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1419AIG#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 LTC1419AIG#PBF meets industry standards.
7.What is the process for return or replacement of LTC1419AIG#PBF?
All LTC1419AIG#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1419AIG#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 LTC1419AIG#PBF part is unused and in its original packaging.
Return procedure for LTC1419AIG#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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