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Analog Devices Inc. LTC2323HUFD-14#PBF
- Part No.:
- LTC2323HUFD-14#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
LTC2323HUFD-14#PBF.pdf
- Description:
- IC ADC 14BIT SAR 28QFN
- Quantity:
- Payment:
- Shipping:
Inventory:258
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Product details
Overview
LTC2323HUFD-14#PBF from Analog Devices is a dual, 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 guaranteed operation from –40°C to +125°C. It integrates dual low-drift (20 ppm/°C max) internal references (2.048 V or 4.096 V), supports CMOS or LVDS serial interface, and targets high-speed data acquisition in harsh-temperature industrial and automotive systems.
For engineers reviewing the LTC2323HUFD-14#PBF datasheet, LTC2323HUFD-14#PBF pinout, LTC2323HUFD-14#PBF application, or LTC2323HUFD-14#PBF equivalent, key selection considerations include its dual-channel 5 Msps timing performance, wide input common mode range (0 V to VDD), 1.8 V–2.5 V I/O compatibility, on-chip reference flexibility, and extended temperature grade suitability for engine control, motor drive feedback, and optical network monitoring.
Technical Context
The LTC2323HUFD-14#PBF implements two independent SAR ADC cores with shared clocking and serial interface logic, each featuring a 15-bit resolution transfer function (14-bit + sign) and one-cycle latency. Its differential input stage supports fully differential, pseudo-differential bipolar, and pseudo-differential unipolar modes without external configuration, with input common mode range spanning 0 V to VDD and differential range of ±REFOUT1/2 or ±REFOUT2/2 depending on mode.
It uses an internal 1.2 V reference buffered to two independently decoupled 4.096 V (or 2.048 V) outputs (REFOUT1/REFOUT2), each with dedicated return pins (REFRTN1/REFRTN2). The CMOS/LVDS mode select pin (Pin 25) configures digital I/O signaling, enabling skew-matched CLKOUT-driven readout or SCK-synchronized transfer with support for 105 MHz SCK in CMOS mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit + sign (15-bit two's complement output); enables digitization of ±VREFOUT full-scale differential inputs with overrange capability. |
| Sampling Rate | 5 Msps per channel; supports real-time capture of signals up to 10 MHz bandwidth (–3 dB) with single-cycle latency. |
| INL | ±1 LSB typical; ensures monotonicity and <0.006% full-scale linearity error for precision closed-loop control. |
| SNR | 80 dB typical at fIN = 2.2 MHz; delivers 13.0 effective bits (ENOB) for high-fidelity signal reconstruction. |
| Operating Temp | –40°C to +125°C; qualified for under-hood automotive, industrial motor drives, and aerospace telemetry applications. |
| Reference | Internal 4.096 V (or 2.048 V) buffer, 20 ppm/°C max drift; eliminates external reference component count and layout sensitivity. |
| Power Dissipation | 38 mW per channel at 5 Msps (5 V supply, CMOS mode); reduces thermal load in dense PCB layouts. |
Pinout & Package
Package: 28-lead (4 mm × 5 mm) plastic QFN (UFD) with exposed pad (Pin 29) soldered to ground plane for thermal and EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pins 1, 8) | Analog power supply | Single 3.3 V or 5 V rail powers both ADC cores and internal LDOs; requires local 10 µF + 0.1 µF bypassing. |
| AIN1+, AIN1– (Pins 7, 6) | Channel 1 differential analog input | Accepts ±4.096 V differential swing with 0 V to VDD common mode; no external bias or configuration required. |
| AIN2+, AIN2– (Pins 2, 3) | Channel 2 differential analog input | Independent second channel with identical specs; enables simultaneous sampling for phase-critical systems. |
| CNV (Pin 9) | Conversion start trigger | Falling edge initiates hold-and-convert; requires low-jitter source synchronized to system timing domain. |
| SCK+, SCK– (Pins 21, 22) | Serial clock input | Differential LVDS or single-ended CMOS clock; supports up to 105 MHz for high-throughput readout. |
| SDO1+, SDO1– (Pins 15, 16) | Channel 1 serial data output | MSB-first 15-bit result; CMOS mode uses SDO1+ only; LVDS mode requires 100 Ω differential termination. |
| CLKOUT+, CLKOUT– (Pins 17, 18) | Skew-matched output clock | Phase-aligned with SDO edges to eliminate setup/hold violations at FPGA/DSP receivers. |
| REFOUT1, REFOUT2 (Pins 12, 26) | Reference buffer outputs | Nominally 4.096 V; each referenced to its own REFRTN pin; disable via REFINT (Pin 28) for external reference use. |
| CMOS/LVDS (Pin 25) | I/O interface mode select | GND = CMOS; OVDD = LVDS; floating = low-power LVDS; determines voltage levels and termination requirements. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent SAR cores | Enables true simultaneous sampling of two analog signals-critical for multiphase current/voltage measurement in motor control. |
| Flexible analog input modes | Supports fully differential, pseudo-differential bipolar, and pseudo-differential unipolar configurations without hardware changes or register writes. |
| Onboard dual reference buffers | Two independent 4.096 V (or 2.048 V) outputs with 20 ppm/°C max drift eliminate need for external references and reduce BOM cost. |
| CMOS/LVDS interface select | Single-pin configuration allows interoperability with 1.8 V/2.5 V FPGAs (CMOS) or high-noise immunity long-reach links (LVDS). |
| Extended temperature grade | H-grade qualification (–40°C to +125°C) ensures parametric compliance in engine compartments, inverters, and downhole tools. |
Applications
| Motor Phase Current Sensing | Optical Network Monitoring |
|---|---|
|
Use Scenario: Real-time sampling of three-phase motor currents using shunt resistors or current transformers in traction inverters. IC Role / Device Role / Timing Role: Dual-channel simultaneous acquisition captures instantaneous current pairs (e.g., IA and IB) with sub-200 ns conversion time and zero inter-channel skew. Use Value: Enables precise field-oriented control (FOC) with 14-bit resolution across ±4.096 V range, supporting >100 kHz PWM switching frequencies. |
Use Scenario: Digitizing photodiode or TIA output voltages in DWDM transceivers for laser bias and receive power calibration. IC Role / Device Role / Timing Role: High-SNR (80 dB) acquisition of low-amplitude optical monitor signals at 5 Msps, synchronized to system timing via CLKOUT. Use Value: Delivers 13.0 ENOB for accurate optical power tracking across temperature, reducing calibration overhead in pluggable modules. |
| Automotive Engine Control | Industrial Data Acquisition |
|
Use Scenario: Capturing cylinder pressure, knock sensor, and wideband O2 sensor outputs in engine control units (ECUs) operating under hood conditions. IC Role / Device Role / Timing Role: H-grade dual ADC interfaces directly to ruggedized sensors; wide common mode range (0 V to VDD) relaxes front-end amplifier design. Use Value: Guaranteed operation to +125°C with ±1 LSB INL ensures consistent combustion timing and emissions compliance across ambient extremes. |
Use Scenario: High-channel-count modular DAQ systems requiring synchronized multi-sensor acquisition (vibration, temperature, strain) in factory automation. IC Role / Device Role / Timing Role: Two independent channels per device reduce per-channel cost and board area; SPI-compatible interface simplifies FPGA-based controller integration. Use Value: 38 mW/channel power and nap/sleep modes enable thermally constrained designs while maintaining fast wake-up (<10 ms REFOUT stabilization). |
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, 5 Msps, single-channel; no integrated reference; requires external 5 V reference and separate digital supply sequencing. | Higher resolution but lacks dual-channel simultaneity and on-chip reference; suited for precision single-signal capture, not phase-coherent pairs. | Select when absolute accuracy >16-bit ENOB is required and channel count is secondary; verify external reference stability and layout isolation. |
| ADS8864IPWR | 16-bit, 1 Msps, single-channel; 1.8 V supply only; no LVDS option; integrated reference fixed at 2.5 V. | Lower speed and single-channel limit use in high-bandwidth or multi-phase systems; optimized for portable, low-power instrumentation. | Choose for battery-powered test equipment where 1 Msps suffices and 1.8 V I/O compatibility is mandatory; not suitable for automotive H-grade environments. |
Compared with AD7960BCPZ-RL7 and ADS8864IPWR, the LTC2323HUFD-14#PBF uniquely combines dual-channel 5 Msps sampling, integrated dual references, H-grade temperature range, and flexible CMOS/LVDS I/O-making it optimal for space-constrained, phase-sensitive, high-temperature embedded systems where channel density and supply simplicity are critical.
Availability
LTC2323HUFD-14#PBF is available at Aetrix Electronics and suitable for high-speed data acquisition systems, automotive engine control units, and industrial motor drive feedback loops requiring stable component supply across extended temperature ranges.
Supply support for LTC2323HUFD-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 LTC2323HUFD-14#PBF belongs to the Linear Technology SAR ADC product line, designed specifically for demanding high-speed, high-accuracy data acquisition in thermally challenging environments where reliability and integration reduce system complexity.
FAQ
What is the maximum sampling rate supported by the LTC2323HUFD-14#PBF?
The LTC2323HUFD-14#PBF supports a maximum sampling rate of 5 Msps per channel, with one-cycle latency and guaranteed timing performance across its full –40°C to +125°C operating range. This rate is achievable using either CMOS or LVDS interface modes, with SCK frequencies up to 105 MHz in CMOS mode and appropriate differential termination in LVDS mode. The device maintains specified SNR and INL at this rate.
Does the LTC2323HUFD-14#PBF require external reference components?
No, the LTC2323HUFD-14#PBF integrates two independent, low-drift (20 ppm/°C max) reference buffers delivering nominally 4.096 V (or 2.048 V) to REFOUT1 and REFOUT2. Each buffer has dedicated return pins (REFRTN1/REFRTN2) and can be disabled via REFINT (Pin 28) to accommodate external references from 1.25 V to VDD. External decoupling (0.1 µF + 10 µF) is required per buffer.
How does the LTC2323HUFD-14#PBF handle pseudo-differential input configurations?
The LTC2323HUFD-14#PBF natively supports pseudo-differential bipolar (e.g., AIN1+ = VREF/2, AIN1– = signal) and pseudo-differential unipolar (e.g., AIN1– = GND, AIN1+ = signal) modes without configuration registers or external circuitry. Its wide input common mode range (0 V to VDD) and differential input structure provide inherent common-mode rejection, enabling direct connection of sensor outputs with minimal front-end conditioning.
What package type and thermal characteristics does the LTC2323HUFD-14#PBF use?
The LTC2323HUFD-14#PBF is housed in a 28-lead (4 mm × 5 mm) plastic QFN (UFD) package with an exposed thermal pad (Pin 29) that must be soldered to the PCB ground plane. Its thermal resistance is θJA = 43°C/W, and maximum junction temperature is +125°C. The package supports reflow soldering and meets JEDEC J-STD-020 moisture sensitivity level 3.
Can the LTC2323HUFD-14#PBF operate with different I/O voltage levels?
Yes, the LTC2323HUFD-14#PBF supports 1.8 V to 2.5 V I/O voltage levels via the OVDD supply (Pin 14), which powers all digital inputs and outputs. This allows seamless interfacing with modern low-voltage FPGAs and DSPs. The CMOS/LVDS pin (Pin 25) selects between CMOS (OVDD-referenced) and LVDS (100 Ω differential) signaling, with floating enabling low-power LVDS mode.
LTC2323HUFD-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:
- -40°C ~ 125°C
- Supplier Device Package:
- 28-QFN (4x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2323HUFD-14#PBF FAQ
1.How can I place an order for LTC2323HUFD-14#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2323HUFD-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 LTC2323HUFD-14#PBF reliable?
The price and inventory of LTC2323HUFD-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 LTC2323HUFD-14#PBF is usually 5 days.
3.What payment methods are accepted for LTC2323HUFD-14#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2323HUFD-14#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2323HUFD-14#PBF?
LTC2323HUFD-14#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2323HUFD-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 LTC2323HUFD-14#PBF?
For technical support, including LTC2323HUFD-14#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2323HUFD-14#PBF requirements.
6.How does Aetrix verify that LTC2323HUFD-14#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2323HUFD-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 LTC2323HUFD-14#PBF meets industry standards.
7.What is the process for return or replacement of LTC2323HUFD-14#PBF?
All LTC2323HUFD-14#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2323HUFD-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 LTC2323HUFD-14#PBF part is unused and in its original packaging.
Return procedure for LTC2323HUFD-14#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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