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Analog Devices Inc. LTC2311IMSE-14#PBF
- Part No.:
- LTC2311IMSE-14#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC2311IMSE-14#PBF.pdf
- Description:
- IC ADC 14BIT SAR 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,220
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Product details
Overview
LTC2311IMSE-14#PBF from Analog Devices (formerly Linear Technology) is a 14-bit + sign successive approximation register (SAR) analog-to-digital converter with differential inputs, 5 Msps throughput, ±0.75 LSB typical INL, 80 dB SNR at 2.2 MHz, and integrated 4.096 V temperature-compensated reference. It operates from a single 3.3 V or 5 V supply and delivers wide input common mode range (0 V to VDD) for high common mode rejection in precision data acquisition systems.
For engineers reviewing the LTC2311IMSE-14#PBF datasheet, LTC2311IMSE-14#PBF pinout, LTC2311IMSE-14#PBF application, or LTC2311IMSE-14#PBF equivalent, key selection considerations include guaranteed 14-bit no-missing-codes operation over –40°C to +85°C, CMOS/LVDS configurable serial interface, 1-cycle latency, and low-power nap/sleep modes supporting industrial and automotive signal conditioning.
Technical Context
The LTC2311IMSE-14#PBF implements a 15-bit SAR architecture with two-phase acquisition/conversion timing, where a falling edge on CNV initiates conversion and sampled voltage is compared against binary-weighted fractions of REFOUT using a differential comparator. Its internal 4.096 V reference exhibits ≤20 ppm/°C drift and supports external 1.25 V reference injection via REFIN.
It features dual-mode digital I/O: CMOS (single-ended SDO+/SCK+) or LVDS (differential SDO±/SCK±), selectable via the CMOS/LVDS pin, with OVDD ranging 1.71 V–2.5 V. The ADC achieves one-cycle latency and supports pseudo-differential unipolar/bipolar and fully differential input configurations without configuration registers or external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit + sign (15-bit two's complement output); provides 32,768 codes across full-scale differential span of ±REFOUT. |
| Sampling Rate | 5 Msps maximum; enables real-time capture of signals up to 2.2 MHz with 80.6 dB SNR and –90 dB THD. |
| INL Error | ±0.75 LSB typical, ±2 LSB guaranteed over –40°C to +85°C; ensures monotonicity and accurate DC measurement linearity. |
| Reference | Integrated 4.096 V buffered reference (≤20 ppm/°C drift); also accepts 1.25 V external reference via REFIN pin. |
| Power Dissipation | 50 mW at 5 V / 5 Msps (CMOS mode); drops to 0.5 µW in sleep mode-critical for battery-powered or thermally constrained systems. |
| Input Range | 8 VP-P differential (±4.096 V), with 0 V to VDD common mode range; eliminates need for level-shifting circuitry in mixed-supply systems. |
| Operating Temp | –40°C to +85°C (I-grade); qualified for industrial and extended-temperature embedded applications without derating. |
Pinout & Package
Package: 16-lead (4 mm × 5 mm) plastic MSOP with exposed pad (Pin 17), lead-free finish. Requires soldering exposed pad to PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1, 5, 8, 11) | Ground reference | Multiple dedicated ground pins minimize ground bounce and improve noise immunity in high-speed sampling. |
| REFIN (Pin 2) | Reference buffer I/O | Outputs 1.25 V internally; grounding disables REFOUT buffer to allow external reference drive into REFOUT. |
| REFOUT (Pin 3) | Reference output | Provides 4.096 V ±0.34% (2.048 V option not active in this variant); requires 10 µF local decoupling for stability. |
| VDD (Pin 4) | Analog power supply | Accepts 3.13 V–5.25 V; powers core ADC and reference; bypass with 1 µF ceramic capacitor near pin. |
| AIN+, AIN– (Pins 6, 7) | Differential analog inputs | Support ±4.096 V differential swing with 0 V–VDD common mode; modeled as 15 Ω RON + 10 pF CIN during acquisition. |
| CNV (Pin 9) | Convert control input | TTL-compatible; falling edge triggers conversion and initiates serial readout; one-cycle latency ensures deterministic timing. |
| CMOS/LVDS (Pin 10) | I/O mode select | Ground = CMOS; tie to OVDD = LVDS; float = low-power LVDS-enables interface optimization without hardware change. |
| OVDD (Pin 12) | Digital I/O supply | 1.71 V–2.5 V; sets logic levels for SDO/SCK; must match host interface (e.g., FPGA I/O bank voltage). |
| SDO+ (Pin 14) | Serial data output (CMOS) | MSB-first output on SCK falling edge; high-impedance when inactive; driven by OVDD voltage. |
| SCK+ (Pin 16) | Serial clock input (CMOS) | Single-ended clock input; supports up to 105 MHz (9.4 ns min period); defines sampling edge for data capture. |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed no missing codes at 14 bits | Ensures monotonic transfer function across full operating temperature range (–40°C to +85°C), eliminating code gaps in closed-loop control. |
| Configurable CMOS or LVDS serial interface | Reduces EMI and improves noise immunity in noisy environments via differential LVDS mode, while retaining CMOS compatibility for legacy designs. |
| Onboard 4.096 V reference with 20 ppm/°C max drift | Eliminates external reference IC and associated layout complexity; maintains <±0.5 LSB gain error drift over full temperature range. |
| One-cycle latency | Enables tight real-time control loops (e.g., motor phase current sensing) with minimal processing delay between sample and result availability. |
| Nap and sleep power modes | Reduces current to 2.8 mA (nap) or 0.1 µA (sleep) - extends battery life in portable instrumentation and reduces thermal load in dense PCB layouts. |
Applications
| High-Speed Data Acquisition | Optical Networking Monitoring |
|---|---|
|
Use Scenario: Real-time digitization of laser bias current and photodiode feedback signals in 100G/400G transceivers. IC Role / Device Role / Timing Role: Primary ADC capturing 2.2 MHz optical channel monitoring waveforms with 80 dB SNR and sub-LSB linearity. Use Value: Enables precise closed-loop power control and fault detection without external amplification or filtering due to 8 VP-P input range and 85 dB CMRR. |
Use Scenario: Analog front-end for wavelength-selective switch (WSS) calibration and spectral analysis. IC Role / Device Role / Timing Role: High-fidelity digitizer for optical power detectors feeding FPGA-based FFT engines. Use Value: 5 Msps throughput and 96 dB SFDR support accurate multi-tone spectral characterization across C-band wavelengths. |
| Automotive Battery Management | Multiphase Motor Control |
|
Use Scenario: Cell voltage and temperature monitoring in high-voltage EV battery packs under EMI-heavy under-hood conditions. IC Role / Device Role / Timing Role: Isolated-side ADC interfacing with isolated SPI or LVDS links to MCU, rejecting common-mode noise from switching inverters. Use Value: Wide 0 V–VDD common mode range allows direct connection to resistive divider networks without level shifters, reducing BOM cost and board space. |
Use Scenario: Current sensing in three-phase inverter legs for field-oriented control (FOC) algorithms. IC Role / Device Role / Timing Role: Simultaneous sampling of phase currents with synchronized CNV triggering across multiple ADCs. Use Value: One-cycle latency and guaranteed monotonicity ensure accurate torque estimation and prevent control instability during rapid load transients. |
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 |
|---|---|---|---|
| AD7980BRMZ-REEL | 16-bit, 1 Msps, 3.3 V only, no internal reference, SPI-only (no LVDS), –40°C to +85°C | Lower speed and resolution; requires external reference and level-shifting for 5 V systems; suited for lower-bandwidth precision measurement. | Select AD7980BRMZ-REEL when higher resolution (16-bit) at lower throughput suffices and LVDS interface is unnecessary. |
| ADS8860IDRCT | 16-bit, 1 Msps, 2.5–5 V supply, internal 2.5 V ref, SPI-only, –40°C to +85°C | No LVDS option; smaller 3 mm × 3 mm VSSOP package; lower power (1.5 mW at 100 kSPS) but significantly slower than 5 Msps requirement. | Choose ADS8860IDRCT for space-constrained, ultra-low-power applications where 1 Msps meets system bandwidth needs. |
Compared with AD7980BRMZ-REEL and ADS8860IDRCT, the LTC2311IMSE-14#PBF uniquely combines 5 Msps speed, integrated 4.096 V reference, LVDS/CMOS flexibility, and guaranteed no-missing-codes performance across industrial temperature range-making it optimal for real-time signal acquisition where latency, interface robustness, and self-contained accuracy are critical.
Availability
LTC2311IMSE-14#PBF is available at Aetrix Electronics and suitable for high-speed data acquisition systems, optical networking monitoring, automotive battery management, and multiphase motor control requiring stable component supply across industrial temperature grades.
Supply support for LTC2311IMSE-14#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.
The LTC2311-14 product line was designed for precision, high-speed data acquisition in thermally demanding and electrically noisy environments-targeting industrial automation, test equipment, and communications infrastructure.
FAQ
What is the operating temperature range for the LTC2311IMSE-14#PBF?
The LTC2311IMSE-14#PBF is rated for –40°C to +85°C (I-grade), fully specified across this range for parameters including INL, SNR, and reference drift. This makes it suitable for industrial control cabinets, automotive under-hood modules, and outdoor telecom equipment where ambient temperatures exceed commercial grade limits.
Does the LTC2311IMSE-14#PBF require an external reference?
No-the LTC2311IMSE-14#PBF integrates a factory-trimmed 4.096 V temperature-compensated reference with ≤20 ppm/°C drift. An external 1.25 V reference may be applied via the REFIN pin to override the internal reference, but it is not required for standard operation of the LTC2311IMSE-14#PBF.
How does the CMOS/LVDS pin affect interface configuration on the LTC2311IMSE-14#PBF?
The CMOS/LVDS pin (Pin 10) selects the serial interface mode: grounded for CMOS (single-ended SDO+/SCK+), tied to OVDD for LVDS (differential SDO±/SCK±), or left floating for low-power LVDS. This hardware-selectable feature allows the same LTC2311IMSE-14#PBF footprint to support multiple host interface standards without firmware or layout changes.
What is the significance of "14-bit + sign" resolution in the LTC2311IMSE-14#PBF?
The "14-bit + sign" designation means the LTC2311IMSE-14#PBF outputs a 15-bit two's complement code: 1 sign bit + 14 magnitude bits. This yields 32,768 codes spanning ±REFOUT differentially, enabling true bipolar measurement (e.g., –4.096 V to +4.096 V) with inherent zero-crossing resolution and no offset calibration requirement.
Can the LTC2311IMSE-14#PBF operate with a 3.3 V supply?
Yes-the LTC2311IMSE-14#PBF supports single-supply operation from 3.13 V to 3.47 V (3.3 V nominal) or 4.75 V to 5.25 V (5 V nominal). At 3.3 V, it delivers 5 Msps with 30 mW power dissipation (CMOS mode) and maintains full specification compliance, including ±2 LSB INL guarantee and 80 dB SNR performance.
LTC2311IMSE-14#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 5M
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- LVDS - Serial, SPI
- 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:
- 3.13V ~ 3.47V, 5V
- Voltage - Supply, Digital:
- 3.13V ~ 3.47V, 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 16-MSOP-EP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2311IMSE-14#PBF FAQ
1.How can I place an order for LTC2311IMSE-14#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2311IMSE-14#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 LTC2311IMSE-14#PBF reliable?
The price and inventory of LTC2311IMSE-14#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2311IMSE-14#PBF is usually 5 days.
3.What payment methods are accepted for LTC2311IMSE-14#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2311IMSE-14#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2311IMSE-14#PBF?
LTC2311IMSE-14#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2311IMSE-14#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 LTC2311IMSE-14#PBF?
For technical support, including LTC2311IMSE-14#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2311IMSE-14#PBF requirements.
6.How does Aetrix verify that LTC2311IMSE-14#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2311IMSE-14#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 LTC2311IMSE-14#PBF meets industry standards.
7.What is the process for return or replacement of LTC2311IMSE-14#PBF?
All LTC2311IMSE-14#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2311IMSE-14#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 LTC2311IMSE-14#PBF part is unused and in its original packaging.
Return procedure for LTC2311IMSE-14#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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