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Analog Devices Inc. LTC1419IG#PBF
- Part No.:
- LTC1419IG#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC1419IG#PBF.pdf
- Description:
- IC ADC 14BIT SAR 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,252
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Product details
Overview
LTC1419IG#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 integrated 2.5V reference. It operates from ±5V supplies, draws 150mW, and targets high-speed data acquisition in spectrum analysis and imaging systems.
For engineers reviewing the LTC1419IG#PBF datasheet, LTC1419IG#PBF pinout, LTC1419IG#PBF application, or LTC1419IG#PBF equivalent, key selection factors include its no-pipeline-delay parallel interface, 20MHz full-power bandwidth, Nap/Sleep shutdown modes, and differential common-mode rejection up to 60dB - critical for noise-sensitive analog front-ends.
Technical Context
The LTC1419IG#PBF implements a capacitor-based successive approximation register (SAR) architecture with an internal sample-and-hold and precision bandgap reference. Its differential input stage acquires signals simultaneously on +AIN and –AIN with 90ns minimum acquisition time and 2psRMS aperture jitter.
Conversion is initiated by CONVST falling edge and signaled via BUSY output; results appear on a 14-bit 2's complement parallel bus with no pipeline delay. Power management includes two digitally selectable shutdown modes: Nap mode (1.5mA supply current) and Sleep mode (250µA), both controlled by SHDN and CS logic levels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with guaranteed no missing codes - ensures monotonic transfer function for precision measurement. |
| Sampling Rate | 800ksps maximum - supports Nyquist-limited signal capture up to 400kHz without aliasing. |
| S/(N + D) | 81.5dB at 100kHz input - enables >13 effective bits of dynamic resolution in baseband applications. |
| THD | –93dB at 100kHz - minimizes harmonic contamination in spectral analysis and communications receivers. |
| Input Bandwidth | 20MHz full-power - allows undersampling of RF/IF signals beyond Nyquist frequency. |
| Common-Mode Rejection | 60dB - suppresses ground-loop noise and EMI in differential sensor interfaces. |
| Reference Output | 2.500V ±20mV, 15ppm/°C tempco - provides stable scaling for absolute voltage measurements. |
| Power Dissipation | 150mW at full speed - balances performance and thermal load in compact embedded systems. |
Pinout & Package
Package: 28-pin SO (Small Outline) - surface-mount, JEDEC MS-012AC compliant, 0.300" body width, 1.27mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +AIN (Pin 1) | Differential analog input positive | Accepts ±2.5V input; sampled simultaneously with –AIN for common-mode noise rejection. |
| –AIN (Pin 2) | Differential analog input negative | Completes differential pair; enables single-ended operation when grounded. |
| VREF (Pin 3) | Internal 2.5V reference output | Provides buffered reference for external circuitry; requires 1µF bypass to AGND. |
| REFCOMP (Pin 4) | Reference amplifier compensation | Stabilizes internal reference amplifier; requires ≥10µF bypass capacitor to AGND. |
| AGND (Pin 5) | Analog ground reference | Star-ground point for analog supplies and reference bypassing; must tie to DGND at single point. |
| D13–D6 (Pins 6–13) | MSB-aligned parallel data outputs | Three-state 2's complement outputs; D13 = MSB, active when CS low and RD low. |
| DGND (Pin 14) | Digital ground reference | Ground return for digital logic; tied to AGND externally to minimize digital noise coupling. |
| D5–D0 (Pins 15–20) | LSB-aligned parallel data outputs | Completes 14-bit bus; D0 = LSB; same timing and drive characteristics as D13–D6. |
| SHDN (Pin 21) | Power shutdown control input | Active-low; selects Nap (CS=0) or Sleep (CS=1) mode to reduce supply current. |
| RD (Pin 22) | Data read strobe input | Enables output drivers when CS is low; data valid on rising edge of BUSY. |
| CONVST (Pin 23) | Conversion start trigger | Falling-edge sensitive; initiates SAR conversion cycle and resets internal logic. |
| CS (Pin 24) | Chip select input | Active-low; enables CONVST/RD recognition and determines shutdown mode with SHDN. |
| BUSY (Pin 25) | Conversion status indicator | Active-low open-drain output; goes high at conversion completion; clocks data validity. |
| VSS (Pin 26) | Negative analog 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 separately per layout guidelines. |
| AVDD (Pin 28) | Analog positive supply | +5V rail; requires 10µF tantalum + 0.1µF ceramic bypass to AGND. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Immediate data availability after BUSY rises - eliminates latency in real-time control loops. |
| True differential input | Simultaneous sampling of +AIN/–AIN with 60dB CMRR - rejects noise without external instrumentation amps. |
| Nap and Sleep shutdown | Reduces IDD to 1.5mA or ISS to 100µA - extends battery life in portable test equipment. |
| Internal 2.5V reference | 15ppm/°C tempco, ±20mV initial accuracy - eliminates need for external reference in cost-sensitive designs. |
| 20MHz full-power bandwidth | Supports direct RF sampling up to 20MHz - enables IF digitization in software-defined radios. |
| ±2.5V bipolar input range | Optimized for low distortion and noise - matches standard op-amp output ranges without level-shifting. |
Applications
| Telecommunications Baseband Processing | Digital Signal Processing Front-End |
|---|---|
Use Scenario: Digitizing I/Q channels in cellular basestation receivers operating at intermediate frequencies up to 400kHz. IC Role / Device Role / Timing Role: High-fidelity 14-bit analog-to-digital conversion with minimal THD and no pipeline latency. Use Value: Preserves signal integrity for FFT-based channel estimation and demodulation algorithms requiring >80dB SFDR. | Use Scenario: Capturing sensor waveforms in real-time vibration analysis systems using FPGA-based DSP pipelines. IC Role / Device Role / Timing Role: Parallel-output ADC synchronized to FPGA clock domain via BUSY and RD handshake. Use Value: Enables deterministic 1.25µs conversion cycle time and zero-latency data transfer for time-critical filtering. |
| Multiplexed Data Acquisition Systems | Imaging System Digitization |
Use Scenario: Scanning multi-channel industrial sensors (strain gauges, thermocouples) in PLC analog input modules. IC Role / Device Role / Timing Role: Precision ADC with differential inputs rejecting common-mode noise from long sensor cables. Use Value: Achieves <±1.25LSB INL over temperature - meets Class A accuracy requirements for process control. | Use Scenario: Converting CCD/CMOS line-scan outputs in medical X-ray and industrial inspection cameras. IC Role / Device Role / Timing Role: High-speed sampling with 81.5dB S/(N+D) to preserve contrast and low-contrast detail in grayscale images. Use Value: Supports >12 effective bits at 375kHz input - captures fine structural features without quantization artifacts. |
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, single-ended input only; no internal reference; SPI interface | Lower throughput but higher resolution; suited for DC-precision data loggers, not RF undersampling | Select when resolution > speed and differential input is not required. |
| MAX1190ECM+ | 14-bit, 1Msps, internal reference, but only 74dB S/(N+D) at 100kHz and no Nap/Sleep modes | Higher sample rate but degraded AC performance; lacks low-power shutdown flexibility | Select when maximum throughput is critical and power budget allows 250mW continuous draw. |
Compared with ADS8515IPW and MAX1190ECM+, the LTC1419IG#PBF uniquely balances 800ksps speed, 81.5dB AC performance, differential input capability, and dual low-power modes - making it optimal for portable spectrum analyzers and battery-powered test instruments where noise, power, and interface simplicity are co-constrained.
Availability
LTC1419IG#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 across extended temperature ranges (–40°C to +85°C).
Supply support for LTC1419IG#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, formed through the acquisition of Linear Technology in 2017.
The LTC1419IG#PBF belongs to ADI's legacy Linear Technology precision data converter product line, designed specifically for high-speed, low-distortion digitization in test & measurement, medical imaging, and communications infrastructure.
FAQ
What is the operating temperature range for the LTC1419IG#PBF?
The LTC1419IG#PBF is specified for industrial operation from –40°C to +85°C. This rating is confirmed in the Absolute Maximum Ratings table and applies to all key AC and DC specifications including S/(N+D), THD, and integral linearity error. The 'I' grade suffix explicitly denotes this extended temperature range, distinguishing it from the commercial-grade 'C' version (0°C to 70°C). Thermal derating is not required within this range.
Does the LTC1419IG#PBF require an external clock source?
No, the LTC1419IG#PBF does not require an external clock. It contains a fully integrated internal clock generator that supports its maximum 800ksps sampling rate. The device uses this internal clock for the successive approximation algorithm and sample-and-hold timing. External timing is managed solely through the CONVST, CS, and RD control signals - eliminating clock distribution complexity and jitter sensitivity in system design.
How does the Nap mode differ from Sleep mode in the LTC1419IG#PBF?
In the LTC1419IG#PBF, Nap mode (SHDN = 0V, CS = 0V) reduces total supply current to 1.5mA while retaining fast wake-up capability (<400ns), whereas Sleep mode (SHDN = 0V, CS = 5V) draws only 250µA but requires longer recovery before next conversion. Nap mode preserves internal bias states for rapid resumption of full-speed operation, making it ideal for burst-mode acquisition; Sleep mode maximizes energy savings during extended idle periods in portable instruments.
Can the LTC1419IG#PBF accept single-ended input signals?
Yes, the LTC1419IG#PBF can accept single-ended inputs by grounding the –AIN pin while applying the signal to +AIN. The datasheet confirms this configuration in Note 6, which states that linearity and offset specifications apply under this condition. However, common-mode noise rejection is lost, and dynamic performance (e.g., THD) may degrade compared to true differential operation - especially at higher input frequencies near the 20MHz bandwidth limit.
What is the purpose of the REFCOMP pin on the LTC1419IG#PBF?
The REFCOMP pin (Pin 4) on the LTC1419IG#PBF is the compensation node for the internal reference amplifier. It must be bypassed to AGND with a ≥10µF capacitor (tantalum or ceramic) to ensure stability of the 2.5V reference output at VREF. This capacitor sets the dominant pole of the reference amplifier loop; omitting it or using insufficient capacitance causes reference oscillation and conversion errors. The datasheet specifies 10µF as the minimum value for guaranteed stability across temperature and load conditions.
LTC1419IG#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:
- -
LTC1419IG#PBF FAQ
1.How can I place an order for LTC1419IG#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1419IG#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 LTC1419IG#PBF reliable?
The price and inventory of LTC1419IG#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1419IG#PBF is usually 5 days.
3.What payment methods are accepted for LTC1419IG#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1419IG#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1419IG#PBF?
LTC1419IG#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1419IG#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 LTC1419IG#PBF?
For technical support, including LTC1419IG#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1419IG#PBF requirements.
6.How does Aetrix verify that LTC1419IG#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1419IG#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 LTC1419IG#PBF meets industry standards.
7.What is the process for return or replacement of LTC1419IG#PBF?
All LTC1419IG#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1419IG#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 LTC1419IG#PBF part is unused and in its original packaging.
Return procedure for LTC1419IG#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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