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Analog Devices Inc. LTC1411IG#PBF
- Part No.:
- LTC1411IG#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 36-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC1411IG#PBF.pdf
- Description:
- IC ADC 14BIT SAR 36SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,369
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Product details
Overview
LTC1411IG#PBF from Analog Devices (formerly Linear Technology) is a 14-bit, 2.5 Msps successive-approximation ADC with true differential inputs, internal 2.5V reference, programmable ±1.8V/±1.27V/±0.9V/±0.64V input ranges, and single 5V supply operation. It delivers ±2 LSB INL, 80 dB S/(N+D) at 100 kHz, and no pipeline delay - enabling high-fidelity signal acquisition in telecom and DSP systems.
For engineers reviewing the LTC1411IG#PBF datasheet, LTC1411IG#PBF pinout, LTC1411IG#PBF application, or LTC1411IG#PBF equivalent, key selection factors include its 36-pin SSOP package, Nap/Sleep shutdown modes (2 mA / 1 µA), out-of-range detection via OTR/D13, and compatibility with FIFOs, DSPs, and microprocessors via simple CONVST/BUSY interface.
Technical Context
The LTC1411IG#PBF employs a capacitor-based SAR architecture with integrated sample-and-hold, factory-trimmed internal clock (260 ns conversion time), and differential input stage rejecting common-mode noise up to 62 dB. Its analog front-end supports both differential and single-ended configurations with AIN– serving as bipolar zero reference point.
Control logic responds to active-low CONVST to initiate conversion; BUSY goes low during conversion and rises ~250–350 ns later, with valid 2's complement data appearing 7 ns after BUSY↑. Programmable gain is set by PGA0/PGA1 pins, altering REFCOM2 voltage (4.05 V down to 1.45 V) to scale full-scale span without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with no missing codes over temperature - guarantees monotonicity and full dynamic range utilization. |
| Sampling Rate | 2.5 Msps maximum - supports real-time digitization of signals up to 1.25 MHz Nyquist bandwidth. |
| S/(N + D) | 80 dB at 100 kHz input - enables >12.7 effective bits for precision measurement applications. |
| INL | ±2 LSB max - ensures accurate amplitude representation across full code range, critical for calibration-sensitive systems. |
| Power Dissipation | 195 mW typical at 5 V - balances speed and thermal load in space-constrained industrial or telecom modules. |
| Shutdown Current | 1 µA in Sleep mode - allows ultra-low-power standby in battery-backed data loggers or portable instrumentation. |
| Input Range | Four software-selectable spans (±1.8 V to ±0.64 V) - simplifies sensor interfacing without external gain stages. |
Pinout & Package
The LTC1411IG#PBF is housed in a 36-pin plastic SSOP (G package) with exposed pad thermal enhancement. Pin assignments are validated per Linear Technology LTC1411 datasheet Rev. F and match the top-view pinout diagram on page 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN+, AIN– (1, 2) | Differential analog inputs | Accept true differential or single-ended signals; common-mode range 0 V to VDD supports rail-to-rail sensing. |
| REFOUT (3) | 2.5 V internal reference output | Provides stable bipolar zero when tied to AIN–; requires 22 µF tantalum bypass if used directly. |
| REFIN (4) | External reference input | Allows higher-precision 2.5 V sources (e.g., LT1019A-2.5) to override internal reference for <5 ppm/°C drift. |
| REFCOM1, REFCOM2 (5, 6) | Noise reduction & reference compensation | Require 10 µF tantalum + 0.1 µF ceramic bypassing to stabilize PGA gain-setting voltage and suppress reference noise. |
| AGND1–3 (7–9) | Analog ground returns | Must be connected to single-point analog ground plane - separates reference, comparator, and core analog circuitry. |
| AVP (10) | Analog power supply | 5 V supply for analog section; requires 10 µF tantalum bypass to AGND1 to minimize switching noise coupling. |
| AVM (11) | Analog/digital substrate tie | Connect directly to AGND to prevent latch-up and reduce substrate noise injection into analog core. |
| D13–D0 (12–25) | Parallel digital outputs | 14-bit 2's complement data bus (D13 = MSB); outputs drive standard CMOS loads with VOH ≥ 4.0 V @ –200 µA. |
| OTR (26) | Out-of-range indicator | Active-high flag used with D13 to distinguish overrange (D13=0, OTR=1) from underrange (D13=1, OTR=1). |
| BUSY (27) | Conversion status | Active-low open-drain output signaling ongoing conversion; timing-critical for synchronous data capture. |
| OGND, OVDD (28, 29) | Digital output ground/supply | Isolated 3 V or 5 V domain for output drivers - prevents digital noise from corrupting analog measurements. |
| DVP (30) | Digital power supply | 5 V supply for internal logic; bypassed to OGND with 10 µF tantalum to decouple CONVST/NAP/SLP switching transients. |
| DGND (31) | Digital ground | Return path for CONVST, NAP, SLP, PGA0/PGA1 - must tie to OGND but remain isolated from AGND. |
| CONVST (32) | Conversion start trigger | Falling-edge sensitive control input; minimum pulse width 20 ns - compatible with FPGA or microcontroller GPIO. |
| PGA0, PGA1 (33, 34) | Programmable gain select | Two-pin binary encoding selects one of four input spans; logic levels must be stable ≥700 ms before conversion if changing range. |
| NAP (35) | Nap mode enable | Pull-down enabled; driving low reduces current to 2 mA while preserving internal reference for external use. |
| SLP (36) | Sleep mode enable | Pull-down enabled; driving low cuts current to <1 µA - wake-up requires 210 ms for full reference stabilization. |
Key Features
| Feature | Design Value |
|---|---|
| True differential input architecture | Rejects common-mode noise up to 62 dB - improves SNR in noisy industrial environments without external instrumentation amps. |
| Internal 2.5 V bandgap reference | Factory trimmed to ±20 mV (±0.8%) and tempco ≤±15 ppm/°C - eliminates need for external reference in cost-sensitive designs. |
| No pipeline delay | Delivers first valid sample within one conversion cycle - essential for closed-loop control and real-time feedback systems. |
| Out-of-range detection with OTR/D13 | Enables automatic signal clipping or gain adjustment in software without external comparators or ADC monitoring logic. |
| Independent analog/digital supply domains | Separate AVP, DVP, OVDD rails with dedicated ground pins - minimizes crosstalk between sampling and data output stages. |
Applications
| Telecommunications Baseband Processing | Digital Signal Processing Front-End |
|---|---|
Use Scenario: Digitizing IF signals in wireless infrastructure equipment operating at 100–500 kHz with strict linearity requirements. IC Role / Device Role / Timing Role: High-speed ADC capturing baseband I/Q channels with minimal harmonic distortion and no latency-induced phase error. Use Value: 90 dB THD at 100 kHz and 80 dB S/(N+D) ensure clean spectral reconstruction for OFDM symbol decoding and adjacent-channel rejection. | Use Scenario: Feeding real-time sensor data into TI C6000 or Analog Devices SHARC DSPs for vibration analysis or audio processing. IC Role / Device Role / Timing Role: Parallel-output ADC synchronized to DSP external memory interface using CONVST/BUSY handshake. Use Value: No pipeline delay and 2.5 Msps throughput allow deterministic sample-to-process latency critical for adaptive filtering algorithms. |
| Multiplexed Data Acquisition Systems | High-Speed Imaging Sensor Interface |
Use Scenario: Scanning multiple thermocouple or strain gauge channels via analog multiplexer in automated test equipment. IC Role / Device Role / Timing Role: ADC with programmable input ranges adapting to varying sensor output spans without hardware reconfiguration. Use Value: Four PGA-selectable spans (±1.8 V to ±0.64 V) eliminate external gain-switching circuitry and reduce BOM count per channel. | Use Scenario: Capturing line-scan CCD or CMOS image sensor outputs requiring precise DC offset control and wide dynamic range. IC Role / Device Role / Timing Role: Bipolar 2's complement ADC with AIN– referenced to REFOUT providing consistent black-level alignment across frames. Use Value: ±2 LSB INL and 14-bit no-missing-code performance preserve fine intensity gradations in medical or scientific imaging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed precision ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9240ASTZ-25 | 14-bit, 25 MSPS pipelined ADC; requires external reference and clock; higher power (1.2 W); no Nap/Sleep modes. | Better suited for undersampling RF applications above Nyquist; not drop-in due to different timing model and pinout. | Select when >2.5 MSPS throughput or RF input frequencies >10 MHz are required; avoid if low-power or simple interface is prioritized. |
| MAX1186ETL+ | 14-bit, 2.5 MSPS SAR ADC; 20-pin TQFN; internal reference; only two input ranges (±2.048 V, ±1.024 V); no OTR pin. | Compact footprint ideal for portable instruments; lacks out-of-range detection and flexible PGA scaling. | Choose for space-constrained designs where simplified range selection suffices and OTR functionality is unnecessary. |
Compared with AD9240ASTZ-25 and MAX1186ETL+, the LTC1411IG#PBF uniquely combines 2.5 Msps speed, four programmable input spans, integrated reference, and dual shutdown modes in a single 36-pin SSOP package - making it optimal for medium-speed, feature-rich embedded data acquisition where power, flexibility, and ease of interface are balanced.
Availability
LTC1411IG#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 LTC1411IG#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, acquired Linear Technology in 2017 to expand precision converter and power management portfolios.
The LTC1411IG#PBF belongs to Linear Technology's legacy high-speed precision ADC family, designed specifically for applications demanding excellent AC performance, low power, and seamless microprocessor/DSP interfacing in industrial, medical, and communications equipment.
FAQ
What is the operating temperature range for the LTC1411IG#PBF?
The LTC1411IG#PBF is specified for operation from –40°C to +85°C (Industrial grade). This is confirmed in the "Order Information" table on page 2 of the datasheet, where "LTC1411IG" denotes the Industrial temperature version. The "C" grade (0°C to 70°C) is distinct and not applicable to this part number.
Does the LTC1411IG#PBF require an external clock source?
No, the LTC1411IG#PBF does not require an external clock. It contains a factory-trimmed internal clock that guarantees a 2.5 Msps sampling rate with typical conversion time of 260 ns and acquisition time of 100 ns. External clocking is not supported - timing is fully controlled by the CONVST signal.
How does the out-of-range (OTR) function work on the LTC1411IG#PBF?
The LTC1411IG#PBF uses OTR in conjunction with D13 (MSB) to indicate overrange or underrange conditions. Per the truth table in Figure 8 and datasheet Table 2: OTR = 1 and D13 = 0 indicates overrange; OTR = 1 and D13 = 1 indicates underrange. This dual-signal scheme avoids ambiguity inherent in single-pin overflow flags.
Can the LTC1411IG#PBF operate with a 3.3 V digital supply?
Yes - the LTC1411IG#PBF supports OVDD = 3 V or 5 V for its digital output drivers (pins D13–D0, OTR, BUSY), as explicitly stated in the "Digital Inputs and Outputs" section (page 3). However, AVP and DVP must remain at 5 V, and the analog input common-mode range remains 0 V to VDD (5 V), so signal conditioning must respect this constraint.
What is the recommended bypassing for the REFCOM2 pin on the LTC1411IG#PBF?
The datasheet specifies a 10 µF tantalum capacitor in parallel with a 0.1 µF ceramic capacitor from REFCOM2 (pin 6) to AGND1. This dual-capacitor configuration stabilizes the PGA gain-setting voltage during range changes and suppresses high-frequency noise that would otherwise degrade reference accuracy and THD performance.
LTC1411IG#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 36-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 2.5M
- 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:
- 36-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1411IG#PBF FAQ
1.How can I place an order for LTC1411IG#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1411IG#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 LTC1411IG#PBF reliable?
The price and inventory of LTC1411IG#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1411IG#PBF is usually 5 days.
3.What payment methods are accepted for LTC1411IG#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1411IG#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1411IG#PBF?
LTC1411IG#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1411IG#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 LTC1411IG#PBF?
For technical support, including LTC1411IG#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1411IG#PBF requirements.
6.How does Aetrix verify that LTC1411IG#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1411IG#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 LTC1411IG#PBF meets industry standards.
7.What is the process for return or replacement of LTC1411IG#PBF?
All LTC1411IG#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1411IG#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 LTC1411IG#PBF part is unused and in its original packaging.
Return procedure for LTC1411IG#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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