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Analog Devices Inc. LTC2323CUFD-14#PBF
- Part No.:
- LTC2323CUFD-14#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
LTC2323CUFD-14#PBF.pdf
- Description:
- IC ADC 14BIT SAR 28QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,086
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Product details
Overview
LTC2323CUFD-14#PBF from Analog Devices is a dual-channel, 14-bit + sign successive approximation register (SAR) analog-to-digital converter with differential inputs, 5 Msps per channel throughput, ±1 LSB typical INL, 80 dB SNR at 2.2 MHz, and integrated 2.048 V / 4.096 V temperature-compensated reference. It operates from single 3.3 V or 5 V supply and supports CMOS or LVDS serial interface - ideal for high-speed data acquisition in motor control and optical networking.
For engineers reviewing the LTC2323CUFD-14#PBF datasheet, LTC2323CUFD-14#PBF pinout, LTC2323CUFD-14#PBF application, or LTC2323CUFD-14#PBF equivalent, key selection criteria include guaranteed 14-bit no-missing-codes performance, wide input common mode range (0 V to VDD), low-power nap/sleep modes (5 µW), and dual-channel simultaneous sampling with one-cycle latency.
Technical Context
The LTC2323CUFD-14#PBF implements two independent SAR ADC cores sharing a common timing engine and reference architecture. Each channel features fully differential input sampling with 10 pF input capacitance and 15 Ω switch on-resistance, enabling flexible pseudo-differential bipolar/unipolar operation without configuration. The internal 2.048 V / 4.096 V reference buffers exhibit ≤20 ppm/°C drift and support external override via REFINT pin.
Its SPI-compatible serial interface supports both CMOS (1.8 V–2.5 V I/O) and LVDS modes with skew-matched CLKOUT output, enabling deterministic timing in FPGA- or DSP-based systems. Conversion is initiated by CNV falling edge, with 171.5 ns conversion time and 200 ns minimum inter-conversion period - delivering true 5 Msps sustained throughput per channel with one-cycle latency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit + sign (15-bit two's complement output), enabling ±32768 code range for full-scale differential input |
| Sampling Rate | 5 Msps per channel, supporting real-time capture of signals up to 10 MHz –3dB input bandwidth |
| INL | ±1 LSB typical, ensuring monotonicity and accurate amplitude measurement across full temperature range |
| SNR | 80 dB typical at fIN = 2.2 MHz, enabling >13-bit effective resolution in high-dynamic-range applications |
| Reference | Internal 2.048 V / 4.096 V, low-drift (≤20 ppm/°C), with REFINT pin to disable for external reference use |
| Power | 38 mW per channel at 5 Msps (5 V), 5 µW in sleep mode - suitable for power-sensitive embedded systems |
| Interface | CMOS or LVDS SPI-compatible serial I/O, with dedicated SDO1/SDO2 and skew-matched CLKOUT outputs |
Pinout & Package
Package: 28-lead (4 mm × 5 mm) plastic QFN with exposed pad (Pin 29 = GND). Requires soldering of exposed pad to PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pins 1, 8) | Analog supply input | Single 3.3 V or 5 V supply; bypassed with 10 µF + 0.1 µF ceramics; pins must be shorted and driven from same source |
| AIN1+, AIN1– (Pins 7, 6); AIN2+, AIN2– (Pins 2, 3) | Differential analog inputs | Support fully differential, pseudo-differential bipolar/unipolar; common mode range 0 V to VDD; no configuration required |
| CNV (Pin 9) | Conversion start trigger | Falling-edge–initiated; requires low-jitter digital source; defines acquisition/conversion boundary with 171.5 ns conversion time |
| REFOUT1/REFOUT2 (Pins 12, 26); REFRTN1/REFRTN2 (Pins 11, 27) | Reference buffer outputs and returns | Nominally 4.096 V; decoupled with 0.1 µF + 10 µF ceramics; REFINT (Pin 28) disables buffers for external reference use |
| SCK+, SCK– (Pins 21, 22); SDO1+/–, SDO2+/– (Pins 15–16, 19–20); CLKOUT+/– (Pins 17–18) | LVDS serial interface | Differential clock/data paths; require 100 Ω termination at receiver; CMOS mode uses only + pins; LVDS mode uses both |
| CMOS/LVDS (Pin 25) | I/O mode select | GND = CMOS; OVDD = LVDS; floating = low-power LVDS - configures driver strength and power consumption |
| OVDD (Pin 14); OGND (Pin 23) | Digital I/O supply and return | 1.71 V–2.5 V logic supply; must be bypassed to OGND with 0.1 µF capacitor; single-point ground connection required |
Key Features
| Feature | Design Value |
|---|---|
| Dual simultaneous sampling | Enables phase-coherent acquisition across two channels - critical for multiphase motor current sensing and I/Q demodulation |
| Flexible analog input modes | Supports fully differential, pseudo-differential bipolar/unipolar, and single-ended signals without hardware reconfiguration or external components |
| Onboard reference with low drift | 2.048 V / 4.096 V buffered reference with ≤20 ppm/°C TC eliminates need for external precision reference in most applications |
| Low-latency serial interface | One-cycle latency and skew-matched CLKOUT ensure deterministic timing alignment between data and clock at FPGA/DSP receivers |
| Ultra-low sleep power | 5 µW total supply current in sleep mode enables rapid wake-up while minimizing system standby power in battery-powered DAQ |
Applications
| High-Speed Motor Control | Optical Network Monitoring |
|---|---|
Use Scenario: Real-time sampling of dual-phase current and voltage in servo drives operating at >10 kHz PWM frequencies. IC Role / Device Role / Timing Role: Dual-channel simultaneous ADC providing synchronized 14-bit + sign samples at 5 Msps to compute instantaneous torque and flux vectors. Use Value: One-cycle latency and guaranteed no-missing-codes enable precise field-oriented control without interpolation or oversampling penalties. | Use Scenario: Digitizing RF envelope and baseband signals in coherent optical transceivers for forward error correction and adaptive equalization. IC Role / Device Role / Timing Role: High-SNR ADC capturing 2.2 MHz IF signals with 80 dB SNR and –85 dB THD to preserve modulation fidelity. Use Value: Integrated 4.096 V reference and 10 MHz –3dB bandwidth eliminate external signal conditioning, reducing BOM and layout complexity. |
| Automotive Radar Signal Processing | Industrial Remote Data Acquisition |
Use Scenario: Capturing chirp echoes from 77 GHz radar front-ends in ADAS ECU modules requiring AEC-Q100 Grade 2 compliance. IC Role / Device Role / Timing Role: Dual-channel SAR ADC operating across –40°C to 125°C with guaranteed 14-bit linearity and 85 dB CMRR at 2.2 MHz. Use Value: Wide input common mode range (0 V to VDD) relaxes requirements on preceding op-amp stages, simplifying high-voltage sensor interfacing. | Use Scenario: Distributed vibration monitoring in wind turbine gearboxes using isolated analog sensors connected over long cables. IC Role / Device Role / Timing Role: Low-noise ADC digitizing ±10 V sensor outputs with 80 dB SNR and 15-bit effective resolution in noisy industrial environments. Use Value: Pseudo-differential unipolar/bipolar support allows direct connection to grounded or floating sensors without external level-shifting circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7960BCPZ-RL7 | 18-bit resolution, 5 Msps, but single-channel; requires external reference and separate clock generation | Lacks dual-channel simultaneous sampling; higher resolution trades off speed and power efficiency | Select when absolute precision > speed or channel count; not drop-in for dual-sampling use cases |
| ADS8860IRGET | 16-bit, 1 Msps, single-channel, SPI-only CMOS interface; no LVDS or internal reference | Lower throughput and no differential clock/data matching; requires external reference and level-shifting for 1.8 V I/O | Choose for cost-sensitive, lower-speed portable instrumentation where LVDS and dual-channel are unnecessary |
Compared with AD7960BCPZ-RL7 and ADS8860IRGET, the LTC2323CUFD-14#PBF uniquely delivers dual-channel 5 Msps sampling with integrated reference, LVDS timing integrity, and flexible input modes - making it optimal for real-time control and communications where synchronization, noise immunity, and design simplicity are critical.
Availability
LTC2323CUFD-14#PBF is available at Aetrix Electronics and suitable for high-speed motor control, optical networking, automotive radar, and industrial remote data acquisition requiring stable component supply across extended temperature ranges.
Supply support for LTC2323CUFD-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. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC2323CUFD-14#PBF belongs to the Linear Technology LTC® high-speed precision SAR ADC product line, designed specifically for demanding data acquisition systems requiring simultaneous dual-channel sampling, low latency, and robust noise immunity in harsh environments.
FAQ
What is the maximum sampling rate supported by the LTC2323CUFD-14#PBF?
The LTC2323CUFD-14#PBF supports a maximum sampling rate of 5 Msps per channel, with guaranteed operation across its full temperature range. This rate is achieved with 171.5 ns conversion time and 200 ns minimum inter-conversion interval. The device maintains ±1 LSB INL and 80 dB SNR at this rate when using the internal 4.096 V reference and proper decoupling - confirmed in the Electrical Characteristics table under fSMPL = 5 Msps conditions.
Does the LTC2323CUFD-14#PBF support external reference voltage sources?
Yes, the LTC2323CUFD-14#PBF supports external references via REFOUT1 and REFOUT2 pins. When REFINT (Pin 28) is tied to GND, the internal reference buffers are disabled, allowing external voltages from 1.25 V to VDD to drive REFOUT1/REFOUT2. The datasheet specifies that external reference operation maintains full 14-bit no-missing-codes performance and preserves all dynamic specifications including 80 dB SNR at 2.2 MHz - verified under "ELECTRICAL CHARACTERISTICS" with VREFOUT1,2 = 5 V, External Reference.
What are the I/O voltage requirements for the LTC2323CUFD-14#PBF digital interface?
The LTC2323CUFD-14#PBF requires OVDD between 1.71 V and 2.5 V for digital I/O operation, supporting both CMOS and LVDS signaling. In CMOS mode, VIH = 0.8 × OVDD and VIL = 0.2 × OVDD; in LVDS mode, VID = 240–600 mV differential and VIS = 1.0–1.45 V common-mode. These values are specified across temperature and validated in the "DIGITAL INPUTS AND DIGITAL OUTPUTS" section - ensuring compatibility with 1.8 V and 2.5 V FPGA/DSP interfaces without level shifters.
How does the LTC2323CUFD-14#PBF handle pseudo-differential input configurations?
The LTC2323CUFD-14#PBF natively supports pseudo-differential bipolar (e.g., AIN1+ = VREF/2, AIN1– = signal) and unipolar (e.g., AIN1– = GND, AIN1+ = signal) modes without hardware configuration. Table 1 in the datasheet confirms code ranges: pseudo-differential bipolar spans 214 codes (±REFOUT/2), unipolar spans 214 codes (0 to REFOUT). The analog input model (Figure 3) shows 10 pF capacitance and 15 Ω switch resistance - enabling direct connection to op-amp drivers without external RC filtering.
What thermal management considerations apply to the LTC2323CUFD-14#PBF package?
The LTC2323CUFD-14#PBF uses a 28-lead 4 mm × 5 mm QFN with exposed pad (Pin 29), which must be soldered to a solid PCB ground plane. Thermal resistance is θJA = 43°C/W, and TJMAX = 125°C. At 38 mW per channel (76 mW total) under 5 V operation, junction temperature rise is ~3.3°C above ambient - well within limits. The datasheet Absolute Maximum Ratings specify continuous operation from 0°C to 70°C (C-grade), and the exposed pad grounding is mandatory for both thermal dissipation and signal integrity.
LTC2323CUFD-14#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 5M
- Number of Inputs:
- 2
- Input Type:
- Differential, Pseudo-Differential
- Data Interface:
- LVDS - Serial, Serial
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 2
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 3.13V ~ 3.47V, 5V
- Voltage - Supply, Digital:
- 3.13V ~ 3.47V, 5V
- Features:
- Simultaneous Sampling
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 28-QFN (4x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2323CUFD-14#PBF FAQ
1.How can I place an order for LTC2323CUFD-14#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2323CUFD-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 LTC2323CUFD-14#PBF reliable?
The price and inventory of LTC2323CUFD-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 LTC2323CUFD-14#PBF is usually 5 days.
3.What payment methods are accepted for LTC2323CUFD-14#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2323CUFD-14#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2323CUFD-14#PBF?
LTC2323CUFD-14#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2323CUFD-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 LTC2323CUFD-14#PBF?
For technical support, including LTC2323CUFD-14#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2323CUFD-14#PBF requirements.
6.How does Aetrix verify that LTC2323CUFD-14#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2323CUFD-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 LTC2323CUFD-14#PBF meets industry standards.
7.What is the process for return or replacement of LTC2323CUFD-14#PBF?
All LTC2323CUFD-14#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2323CUFD-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 LTC2323CUFD-14#PBF part is unused and in its original packaging.
Return procedure for LTC2323CUFD-14#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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