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Analog Devices Inc. LTC1409IG#TRPBF
- Part No.:
- LTC1409IG#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC1409IG#TRPBF.pdf
- Description:
- IC ADC 12BIT SAR 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,712
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Product details
Overview
LTC1409IG#TRPBF from Analog Devices (formerly Linear Technology) is a 12-bit, 800ksps successive-approximation ADC with differential analog inputs, ±2.5V bipolar input range, 72.5dB S/(N+D) at 400kHz, and integrated 2.5V reference. It operates from ±5V supplies, draws 80mW, and targets high-speed data acquisition in DSP and telecom systems.
For engineers reviewing the LTC1409IG#TRPBF datasheet, LTC1409IG#TRPBF pinout, LTC1409IG#TRPBF application, or LTC1409IG#TRPBF equivalent, key selection factors include its 20MHz full-power bandwidth, no-pipeline-delay parallel output, Nap/Sleep shutdown modes (4mW / 10µW), and true differential sampling rejecting >60dB common-mode noise up to 100kHz.
Technical Context
The LTC1409IG#TRPBF uses a capacitive DAC-based successive-approximation architecture with an internal sample-and-hold featuring 150ns acquisition time and –1.5ns aperture delay. Its differential input stage supports both single-ended (–AIN grounded) and fully differential signal acquisition up to 20MHz bandwidth.
Conversion is initiated by a falling edge on CONVST under active CS; BUSY goes low during conversion and rises when 12-bit parallel data (D11–D0) is valid. A separate OVDD pin enables direct interfacing to 3V or 5V logic without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with no missing codes; guarantees monotonic transfer function for precision measurement. |
| Sampling Rate | 800ksps maximum; enables Nyquist-limited analysis of signals up to 400kHz. |
| S/(N + D) | 72.5dB at 400kHz input; defines usable dynamic range for spectral analysis applications. |
| INL / DNL | ±1LSB over temperature; ensures <0.025% end-point linearity error in closed-loop control. |
| Input Range | ±2.5V differential; supports direct connection to op-amp outputs without gain/level shift. |
| Power Modes | Nap (4mW) and Sleep (10µW); reduces system power between acquisitions in battery-sensitive designs. |
| Common-Mode Rejection | 60dB up to 100kHz; suppresses ground-loop noise in industrial sensor interfaces. |
Pinout & Package
Package: 28-pin SOIC Wide (G package), RoHS-compliant, θJA = 95°C/W, rated for –40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +AIN (1) | Differential analog input positive | Accepts signal up to AVDD; paired with –AIN for common-mode rejection. |
| –AIN (2) | Differential analog input negative | Enables true differential acquisition; common-mode voltage may float within supply rails. |
| VREF (3) | 2.5V reference output | Factory-trimmed bandgap source; buffered via internal amplifier for DAC stability. |
| REFCOMP (4) | Reference compensation node | Requires ≥1µF bypass to AGND; critical for reference amplifier stability and noise performance. |
| AGND (5) | Analog ground return | Must be tied to DGND and OGND at single point; separates analog return from digital switching noise. |
| D11–D0 (6–13,15–18) | 12-bit parallel data outputs | Three-state, MSB-first; driven by OVDD-supplied output buffers for 3V/5V logic compatibility. |
| BUSY (25) | Conversion status indicator | Active-low open-drain; rising edge marks valid data ready for read cycle. |
| CONVST (23) | Conversion start trigger | Falling-edge sensitive; initiates SAR cycle and resets internal register; timing-critical for throughput. |
| SHDN / NAP/SLP (21,20) | Power management control | NAP/SLP selects shutdown mode; SHDN activates Nap (fast wake-up) or Sleep (ultra-low IQ) as configured. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Output data reflects exact sample captured at CONVST edge-critical for real-time control loop timing. |
| Differential input architecture | Rejects >60dB common-mode noise up to 100kHz, enabling clean measurements in noisy industrial environments. |
| Separate OVDD supply | Allows direct interface to 3V microcontrollers or FPGAs without external level translators or voltage dividers. |
| Internal 2.5V reference | 15ppm/°C tempco and ±0.8% initial accuracy eliminate need for external reference in cost-sensitive designs. |
| 20MHz full-power bandwidth | Supports undersampling of RF IF signals up to 15MHz, extending utility beyond baseband acquisition. |
Applications
| Telecommunications Baseband Processing | Digital Signal Processing Systems |
|---|---|
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 12-bit sampling front-end with precise timing alignment between I and Q paths via simultaneous differential sampling. Use Value: 72.5dB S/(N+D) preserves SNR margin for 16-QAM demodulation; no pipeline delay ensures deterministic latency for adaptive equalization. | Use Scenario: Real-time FFT-based spectral analysis in portable test equipment requiring 800ksps continuous capture. IC Role / Device Role / Timing Role: Primary ADC feeding FPGA-based FFT engine; BUSY-synchronized read avoids FIFO overflow at full rate. Use Value: 20MHz analog bandwidth captures harmonics beyond Nyquist; ±1LSB INL maintains amplitude accuracy across 4096-point transforms. |
| Multiplexed Industrial Data Acquisition | Imaging System Signal Chain |
Use Scenario: Scanning multiple RTD or strain-gauge sensors in PLC modules using analog multiplexer before ADC input. IC Role / Device Role / Timing Role: Precision sampling node with Nap mode activated between channel switches to minimize average power. Use Value: 60dB CMRR rejects noise from shared 24V DC bus; ±2.5V input range matches typical instrumentation amplifier outputs. | Use Scenario: Capturing line-scan CCD output in medical X-ray detectors where low distortion preserves contrast resolution. IC Role / Device Role / Timing Role: High-linearity digitizer synchronized to pixel clock; THD ≤ –86dB prevents harmonic artifacts in grayscale rendering. Use Value: 86dB THD at 100kHz eliminates ghosting in 10-bit+ image reconstruction; 150ns acquisition time supports >10k lines/sec scanning. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit, 800ksps ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7892BRZ-1 | Same 12-bit SAR architecture, 800ksps, but requires external reference and lacks differential input stage. | Needs external op-amp and reference for differential signaling; higher BOM count and layout sensitivity. | Choose when existing design already includes precision external reference and single-ended signal chain. |
| MAX1167BCAP+ | 12-bit, 500ksps (slower), internal reference, SPI interface instead of parallel; no differential input. | Lower throughput limits real-time control; serial interface reduces pin count but increases CPU overhead. | Prefer for space-constrained embedded systems where 500ksps suffices and microcontroller has SPI but limited parallel bus. |
Compared with AD7892BRZ-1 and MAX1167BCAP+, the LTC1409IG#TRPBF delivers superior system-level integration via its differential input, on-chip reference, and parallel interface-reducing component count and improving noise immunity in high-density signal acquisition boards.
Availability
LTC1409IG#TRPBF is available at Aetrix Electronics and suitable for telecommunications infrastructure, digital signal processing hardware, and multiplexed industrial data acquisition systems requiring stable component supply across extended temperature ranges.
Supply support for LTC1409IG#TRPBF 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 acquired Linear Technology in 2017 and maintains its high-performance precision analog portfolio, emphasizing signal chain integrity, low-noise design, and automotive/industrial reliability.
The LTC1409IG#TRPBF belongs to Linear's legacy high-speed precision ADC family, engineered specifically for applications demanding wide bandwidth, excellent AC performance, and robust DC accuracy in harsh electrical environments.
FAQ
What is the guaranteed operating temperature range for the LTC1409IG#TRPBF?
The LTC1409IG#TRPBF is specified for industrial temperature operation from –40°C to +85°C. This rating is confirmed in the Absolute Maximum Ratings table and applies to all DC and AC specifications including ±1LSB INL/DNL, 72.5dB S/(N+D), and 800ksps sampling rate across the full range.
Does the LTC1409IG#TRPBF require an external reference, or can it operate with its internal reference?
The LTC1409IG#TRPBF operates fully with its internal 2.5V reference (VREF pin), which is factory-trimmed to ±0.8% accuracy and exhibits ±15ppm/°C tempco. External reference use is optional and supported via overdriving VREF; the internal reference eliminates BOM cost and board area in most applications.
How does the differential input architecture of the LTC1409IG#TRPBF improve noise immunity in real-world layouts?
The LTC1409IG#TRPBF achieves 60dB common-mode rejection up to 100kHz by sampling +AIN and –AIN simultaneously with matched internal capacitance. This allows users to route sensor signals differentially-rejecting ground loops, EMI coupling, and supply ripple that appear identically on both traces-without requiring matched external components.
What is the minimum acquisition time required for full 12-bit accuracy at 800ksps with the LTC1409IG#TRPBF?
The LTC1409IG#TRPBF specifies a maximum acquisition time of 150ns for full-scale settling. This value is guaranteed over temperature and ensures the internal sample-and-hold capacitor fully captures the analog input before conversion begins, maintaining ±1LSB DNL even at maximum throughput.
Can the LTC1409IG#TRPBF interface directly with a 3.3V FPGA or microcontroller without level-shifting circuitry?
Yes-the LTC1409IG#TRPBF features a dedicated OVDD pin (Pin 27) that powers its digital output drivers. By connecting OVDD to 3.3V, the D11–D0 outputs swing rail-to-rail between 0V and 3.3V with VOH ≥ 3.0V and VOL ≤ 0.4V, meeting standard 3.3V CMOS input thresholds without external translators.
LTC1409IG#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- 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:
- -
LTC1409IG#TRPBF FAQ
1.How can I place an order for LTC1409IG#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1409IG#TRPBF 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 LTC1409IG#TRPBF reliable?
The price and inventory of LTC1409IG#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1409IG#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1409IG#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1409IG#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1409IG#TRPBF?
LTC1409IG#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1409IG#TRPBF 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 LTC1409IG#TRPBF?
For technical support, including LTC1409IG#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1409IG#TRPBF requirements.
6.How does Aetrix verify that LTC1409IG#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1409IG#TRPBF 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 LTC1409IG#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1409IG#TRPBF?
All LTC1409IG#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1409IG#TRPBF, 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 LTC1409IG#TRPBF part is unused and in its original packaging.
Return procedure for LTC1409IG#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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