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Analog Devices Inc. LTC2323HUFD-16#PBF
- Part No.:
- LTC2323HUFD-16#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
LTC2323HUFD-16#PBF.pdf
- Description:
- IC ADC 16BIT SAR 28QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,960
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Product details
Overview
LTC2323HUFD-16#PBF from Analog Devices is a dual-channel, 16-bit, 5 Msps successive approximation register (SAR) analog-to-digital converter with differential inputs, ±4 LSB typical INL, 81 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, supports CMOS or LVDS serial interface, and targets high-speed data acquisition in harsh thermal environments.
For engineers reviewing the LTC2323HUFD-16#PBF datasheet, LTC2323HUFD-16#PBF pinout, LTC2323HUFD-16#PBF application, or LTC2323HUFD-16#PBF equivalent, this page delivers verified specifications, validated pin functions, confirmed thermal performance to 125°C, and real-world interface implementation details for FPGA- and DSP-based systems.
Technical Context
The LTC2323HUFD-16#PBF implements two independent SAR ADC cores sharing a common SCK input and separate SDO/CLKOUT pairs per channel, enabling simultaneous sampling with one-cycle latency. Its differential input stage accepts ±REFOUT1,2 (±4.096 V) full-scale range with 85 dB CMRR at 2.2 MHz and supports arbitrary common-mode voltage from 0 V to VDD.
It integrates two low-drift (≤20 ppm/°C) reference buffers (REFOUT1/REFOUT2), configurable via REFINT pin to enable external references from 1.25 V to VDD. The CMOS/LVDS mode select (Pin 25) determines I/O logic family and power profile, with LVDS supporting 100 Ω differential termination and low-power LVDS available via floating mode select.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - guarantees no missing codes across full operating temperature range (–40°C to 125°C). |
| Sampling Rate | 5 Msps per channel - enables real-time capture of signals up to 2.2 MHz with 32k-point FFT capability. |
| INL (Typ) | ±4 LSB - ensures monotonicity and <0.1% full-scale linearity error for precision measurement systems. |
| SNR (Typ) | 81 dB at fIN = 2.2 MHz - delivers >13.2 effective number of bits (ENOB) for high-fidelity signal digitization. |
| Reference Voltage | 4.096 V internal (2.048 V option not enabled on this variant) - provides stable, temperature-compensated scaling without external components. |
| Supply Range | VDD = 4.75 V to 5.25 V or 3.13 V to 3.47 V - supports both 5 V and 3.3 V system rails with guaranteed operation. |
| Power (Typ) | 40 mW per channel at 5 Msps - balances speed and efficiency for thermally constrained industrial designs. |
Pinout & Package
Package: 28-lead (4 mm × 5 mm) plastic QFN (UFD) with exposed pad (Pin 29) soldered to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pins 1, 8) | Analog power supply | Must be bypassed with 10 µF + 0.1 µF ceramics; pins shorted together and driven from same rail. |
| AIN1+, AIN1– (Pins 7, 6) | Channel 1 differential analog input | Accepts ±4.096 V differential swing with 0 V to VDD common-mode range; no configuration required. |
| AIN2+, AIN2– (Pins 2, 3) | Channel 2 differential analog input | Independent full-scale range referenced to REFOUT2; matches AIN1 timing and accuracy specs. |
| CNV (Pin 9) | Conversion start trigger | Falling edge initiates hold-and-convert; requires low-jitter source synchronized to OVDD logic levels. |
| SCK+, SCK– (Pins 21, 22) | Serial clock input | Differential LVDS or single-ended CMOS clock; tSCK ≤ 9.4 ns supports up to 105 MHz SCK frequency. |
| SDO1+, SDO1– (Pins 15, 16) | Channel 1 serial data output | MSB-first, SPI-compatible; LVDS mode requires 100 Ω differential termination at receiver (e.g., FPGA). |
| CLKOUT+, CLKOUT– (Pins 17, 18) | Skew-matched output clock | Provides phase-aligned clock to latch SDO1 data; eliminates setup/hold timing margin concerns at receiver. |
| REFOUT1, REFOUT2 (Pins 12, 26) | Internal reference outputs | Nominally 4.096 V; decoupled with 0.1 µF + 10 µF ceramics; disabled when REFINT = GND for external reference use. |
| CMOS/LVDS (Pin 25) | I/O interface mode select | GND = CMOS; OVDD = LVDS; floating = low-power LVDS - configures drive strength, termination, and current draw. |
| REFINT (Pin 28) | Reference buffer enable | Tie to VDD to activate internal REFOUT1/REFOUT2; tie to GND to disable buffers and accept external reference. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent SAR cores | Enables true simultaneous sampling of two channels with matched aperture delay (≤500 ps) and jitter (1 ps RMS). |
| Onboard 4.096 V reference buffer | Eliminates need for external reference IC; 20 ppm/°C max drift ensures stability over –40°C to 125°C operating range. |
| LVDS or CMOS serial interface | Reduces EMI and improves noise immunity in dense PCB layouts; supports FPGA/CPLD interfacing without level shifters. |
| One-cycle conversion latency | Minimizes pipeline delay for closed-loop control applications such as multiphase motor control and real-time feedback systems. |
| Nap/sleep power modes | Reduces current to 5 µA (sleep) or ~3 mA (nap), enabling rapid wake-up while preserving system-level power budget. |
Applications
| High-Speed Data Acquisition | Optical Networking Monitoring |
|---|---|
|
Use Scenario: Real-time digitization of RF IF signals in baseband receivers or spectrum analyzers requiring >2 MHz bandwidth and high dynamic range. IC Role / Device Role / Timing Role: Dual-channel ADC capturing synchronized I/Q data streams at 5 Msps with 81 dB SNR and 85 dB CMRR. Use Value: Enables direct sampling of 2.2 MHz signals without analog downconversion, reducing component count and board area. |
Use Scenario: Monitoring laser bias current and photodiode output in 10G/25G optical transceivers under varying ambient temperatures. IC Role / Device Role / Timing Role: Precision analog front-end digitizing sensor outputs with guaranteed operation to 125°C and low drift reference. Use Value: Maintains calibration integrity across thermal cycling without recalibration, improving long-term system reliability. |
| Automotive Powertrain Sensing | Multiphase Motor Control |
|
Use Scenario: Measuring cylinder pressure, knock sensor signals, and exhaust gas oxygen in engine control units (ECUs) deployed in under-hood environments. IC Role / Device Role / Timing Role: High-speed, ruggedized ADC converting differential sensor outputs with wide common-mode range (0 V to VDD) and ESD-protected inputs. Use Value: Survives automotive load dump and cold-crank conditions while delivering ±4 LSB INL for accurate combustion analysis. |
Use Scenario: Sampling current and voltage feedback from three-phase inverter legs in servo drives and EV traction inverters. IC Role / Device Role / Timing Role: Simultaneous dual-channel acquisition of phase currents with matched timing (<500 ps skew) for vector control algorithms. Use Value: Eliminates inter-channel timing mismatch that causes torque ripple, improving motor efficiency and acoustic performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed dual-channel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7606C-16 | 8-channel, parallel/serial interface; 1 MSPS per channel; ±10 V input range; internal 2.5 V ref only (no 4.096 V option) | Better channel density but lower speed; lacks LVDS interface and 125°C rating | Select for multi-sensor systems needing >2 channels at lower throughput; not drop-in for 5 Msps dual-channel LVDS designs. |
| ADS8924BRGET | Single-channel, 20 MSPS, 16-bit SAR; 1.8 V I/O; no integrated reference; requires external 4.096 V ref | Higher speed but no dual-channel sync; no onboard reference reduces BOM count but increases design complexity | Select when single-channel bandwidth >5 MSPS is critical and dual-channel simultaneity is not required. |
Compared with AD7606C-16 and ADS8924BRGET, the LTC2323HUFD-16#PBF uniquely combines dual-channel 5 Msps throughput, integrated 4.096 V reference, LVDS interface, and guaranteed 125°C operation-making it optimal for space-constrained, thermally demanding, high-fidelity dual-signal acquisition.
Availability
LTC2323HUFD-16#PBF is available at Aetrix Electronics and suitable for high-speed data acquisition systems, optical networking monitoring equipment, and automotive powertrain sensing applications requiring stable component supply across extended temperature ranges.
Supply support for LTC2323HUFD-16#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 (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.
The LTC2323HUFD-16#PBF belongs to the LTC® high-speed precision SAR ADC product line, designed specifically for industrial, automotive, and communications systems demanding wide dynamic range, low latency, and robust operation beyond 105°C.
FAQ
What is the maximum operating temperature for the LTC2323HUFD-16#PBF?
The LTC2323HUFD-16#PBF is rated for operation from –40°C to +125°C (H-grade), with thermal performance validated across this full range. Its internal reference drift is specified at ≤20 ppm/°C, and all key AC/DC parameters-including INL, SNR, and THD-are guaranteed over this extended temperature span. This makes the LTC2323HUFD-16#PBF suitable for under-hood automotive, downhole oil/gas, and industrial motor control applications where ambient heat exceeds standard commercial or industrial grades.
Does the LTC2323HUFD-16#PBF support external reference voltage sources?
Yes, the LTC2323HUFD-16#PBF supports external references via the REFINT pin (Pin 28). When REFINT is tied to ground, both internal reference buffers (REFOUT1 and REFOUT2) are disabled, allowing external voltages from 1.25 V to VDD to be applied directly to REFOUT1 and REFOUT2 pins. This configuration maintains full 16-bit performance and enables system-level reference sharing or ultra-low-noise external references-critical for metrology-grade applications where internal reference drift must be eliminated.
How does the CMOS/LVDS pin (Pin 25) affect power consumption and interface compatibility?
The CMOS/LVDS pin (Pin 25) configures the digital I/O interface: grounded for CMOS mode (1.8 V/2.5 V logic), tied to OVDD for standard LVDS mode, or left floating for low-power LVDS mode. In LVDS mode, the LTC2323HUFD-16#PBF draws ~8 mA OVDD current at 5 Msps, versus ~5 mA in CMOS mode. All modes maintain identical timing specs and SPI protocol compatibility, but LVDS reduces EMI and improves noise margin-especially beneficial in FPGA-connected systems with long trace lengths or noisy power domains.
Can the LTC2323HUFD-16#PBF perform simultaneous sampling on both channels?
Yes, the LTC2323HUFD-16#PBF performs true simultaneous sampling using independent sample-and-hold circuits per channel, triggered by a single CNV falling edge. Aperture delay matching is guaranteed ≤500 ps, and conversion results are read out sequentially via separate SDO1/SDO2 buses. This architecture eliminates inter-channel skew-essential for I/Q demodulation, phase-sensitive measurements, and three-phase current sensing where timing coherence between channels directly impacts control loop accuracy.
What decoupling capacitors are required for the REFOUT1 and REFOUT2 pins of the LTC2323HUFD-16#PBF?
Each REFOUT pin (12 and 26) requires local decoupling with a 0.1 µF X7R ceramic capacitor (0402 size, placed without vias) in parallel with a 10 µF X5R ceramic capacitor (0805 size). These values are specified in the LTC2323-16 datasheet to suppress high-frequency noise and stabilize the reference buffer output under dynamic load. Failure to meet this decoupling requirement degrades SNR and increases THD-particularly evident in FFT-based spectral analysis where spurious content rises above –85 dBc.
LTC2323HUFD-16#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:
- 16
- 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-16#PBF FAQ
1.How can I place an order for LTC2323HUFD-16#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2323HUFD-16#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-16#PBF reliable?
The price and inventory of LTC2323HUFD-16#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-16#PBF is usually 5 days.
3.What payment methods are accepted for LTC2323HUFD-16#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2323HUFD-16#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2323HUFD-16#PBF?
LTC2323HUFD-16#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2323HUFD-16#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-16#PBF?
For technical support, including LTC2323HUFD-16#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2323HUFD-16#PBF requirements.
6.How does Aetrix verify that LTC2323HUFD-16#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2323HUFD-16#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-16#PBF meets industry standards.
7.What is the process for return or replacement of LTC2323HUFD-16#PBF?
All LTC2323HUFD-16#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2323HUFD-16#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-16#PBF part is unused and in its original packaging.
Return procedure for LTC2323HUFD-16#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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