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Analog Devices Inc. LTC2323CUFD-14#TRPBF
- Part No.:
- LTC2323CUFD-14#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
LTC2323CUFD-14#TRPBF.pdf
- Description:
- IC ADC 14BIT SAR 28QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,731
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Product details
Overview
LTC2323CUFD-14#TRPBF 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 integrated 2.048 V / 4.096 V temperature-compensated reference. It operates from a single 3.3 V or 5 V supply and targets high-speed data acquisition in instrumentation and motor control.
For engineers reviewing the LTC2323CUFD-14#TRPBF datasheet, LTC2323CUFD-14#TRPBF pinout, LTC2323CUFD-14#TRPBF application, or LTC2323CUFD-14#TRPBF equivalent, key selection criteria include guaranteed 14-bit no-missing-codes performance, LVDS/CMOS serial interface flexibility, 125°C operation capability (C-grade), and low 38 mW/channel power dissipation at full speed.
Technical Context
The LTC2323CUFD-14#TRPBF implements two independent SAR ADC cores with shared timing control, each featuring a 15-bit internal CDAC and differential comparator for 14-bit + sign output resolution. Its wide input common mode range (0 V to VDD) supports pseudo-differential unipolar/bipolar and fully differential signal acquisition without external configuration.
It integrates dual low-drift (≤20 ppm/°C) reference buffers (REFOUT1/REFOUT2), configurable CMOS or LVDS serial I/O (via CMOS/LVDS pin), and one-cycle latency readout synchronized to CLKOUT. Power states include active, nap (2.85–5 mA), and sleep (1–5 μA), enabling dynamic power scaling in burst-mode systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit + sign (15-bit two's complement output); delivers 250 µV LSB step size with 4.096 V reference. |
| Sampling Rate | 5 Msps per channel; enables real-time capture of signals up to 2.2 MHz with >79 dB SINAD. |
| INL | ±1 LSB typical; ensures monotonicity and <0.006% full-scale linearity error across temperature. |
| SNR | 80 dB typical at fIN = 2.2 MHz; supports high-fidelity digitization of narrowband RF or sensor signals. |
| Reference | Internal 2.048 V or 4.096 V, 20 ppm/°C max drift; eliminates external reference component and layout complexity. |
| Supply | Single 3.3 V or 5 V (VDD); I/O voltage 1.8 V to 2.5 V (OVDD); simplifies mixed-voltage system integration. |
| Power (Active) | 38 mW per channel at 5 Msps (5 V); enables thermally constrained high-channel-count DAQ designs. |
Pinout & Package
Package: 28-lead (4 mm × 5 mm) plastic QFN (UFD) with exposed pad (Pin 29 = GND). RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (1, 8) | Analog power supply | Must be bypassed with 10 µF + 0.1 µF ceramics; powers ADC core and reference buffers. |
| AIN1+, AIN1– (6, 7) | Channel 1 differential analog input | Accepts ±REFOUT1 full-scale swing; supports pseudo-differential unipolar/bipolar without configuration. |
| AIN2+, AIN2– (2, 3) | Channel 2 differential analog input | Independent of Channel 1; identical electrical specs and common-mode range (0 V to VDD). |
| CNV (9) | Conversion start trigger | Falling edge initiates sample-and-hold and conversion; requires low-jitter digital source. |
| SCK+, SCK– (21, 22) | Serial clock input | Differential LVDS or single-ended CMOS; 105 MHz max clock rate supports 5 Msps readout. |
| SDO1+, SDO1– (15, 16) | Channel 1 serial data output | MSB-first, two's complement; LVDS mode requires 100 Ω differential termination at FPGA receiver. |
| CLKOUT+, CLKOUT– (17, 18) | Skew-matched output clock | Enables synchronous latching of SDO data; eliminates setup/hold timing margin concerns. |
| REFOUT1, REFOUT2 (12, 26) | Reference buffer outputs | Nominally 4.096 V; decoupled with 10 µF + 0.1 µF ceramics; disable via REFINT = GND for external ref. |
| CMOS/LVDS (25) | I/O interface mode select | GND = CMOS; OVDD = LVDS; floating = low-power LVDS; configures all digital I/O simultaneously. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent SAR ADCs | Enables simultaneous sampling of two channels with matched timing and gain, critical for phase-sensitive applications like motor current sensing. |
| Flexible analog input modes | Supports fully differential, pseudo-differential bipolar/unipolar, and single-ended signals - all without hardware reconfiguration or external switches. |
| Onboard reference with low drift | 2.048 V / 4.096 V output, ≤20 ppm/°C drift, eliminates need for external precision reference and reduces BOM count by one component. |
| LVDS or CMOS serial interface | Configurable via single pin; LVDS reduces EMI and enables longer trace routing; CMOS lowers power for short-reach FPGA interfaces. |
| One-cycle latency readout | Delivers conversion result on next SCK edge after CNV falling edge - enables deterministic real-time control loop execution. |
| Three power states | Active (38 mW/ch), nap (9–13 mW), sleep (1–5 µW); allows dynamic power scaling between acquisition bursts without firmware overhead. |
Applications
| High-Speed Data Acquisition | Optical Networking Monitoring |
|---|---|
|
Use Scenario: Real-time digitization of multi-channel sensor outputs (e.g., strain gauges, accelerometers) in industrial test equipment operating at 5 Msps. IC Role / Device Role / Timing Role: Dual-channel ADC captures synchronized analog waveforms with 14-bit resolution and <1 ns aperture jitter, feeding FPGA-based FFT processing. Use Value: 80 dB SNR and ±1 LSB INL ensure accurate amplitude and phase measurement of sub-µV signals over wide dynamic range. |
Use Scenario: Monitoring laser bias current and photodiode feedback in 100G optical transceivers with tight thermal constraints. IC Role / Device Role / Timing Role: Digitizes analog monitor signals at 5 Msps while operating up to 125°C ambient, interfacing directly to ASIC control logic via LVDS. Use Value: Integrated 4.096 V reference and 20 ppm/°C drift guarantee stable gain calibration across temperature without external compensation. |
| Multiphase Motor Control | Communications Baseband Processing |
|
Use Scenario: Simultaneous sampling of three-phase current and DC bus voltage in servo drives for field-oriented control (FOC) algorithms. IC Role / Device Role / Timing Role: Dual ADC channels acquire current feedback with one-cycle latency, enabling precise PWM update timing within 200 ns cycle time. Use Value: Pseudo-differential bipolar input mode accepts ±2.048 V signals directly from current-sense amplifiers, eliminating level-shifting circuitry. |
Use Scenario: Digitizing IF signals in software-defined radio (SDR) front-ends where SNR and spurious-free dynamic range are critical. IC Role / Device Role / Timing Role: Converts 2.2 MHz band-limited signals with 88.4 dB SFDR and –85.5 dB THD, feeding DSP for digital downconversion. Use Value: 10 MHz –3 dB input bandwidth and 1 ps RMS aperture jitter preserve signal integrity for high-order QAM demodulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, high-speed SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7960BCPZ-RL7 | 18-bit, 5 Msps, single-channel only; no integrated reference; requires external 5 V reference and separate clock distribution. | Higher resolution but lacks dual-channel simultaneity and onboard reference; needs additional support components. | Select when absolute precision > speed and channel count; not drop-in for dual-sampling use cases requiring REFOUT1/REFOUT2. |
| ADS8860IRGET | 16-bit, 1 Msps, single-channel; SPI-only CMOS interface; no LVDS option; 1.8 V supply only; no internal reference. | Lower speed and single-channel limits real-time control loop bandwidth; requires external reference and level-shifting for 3.3/5 V systems. | Choose for lower-power, lower-cost 16-bit applications where 5 Msps dual-channel sync is unnecessary. |
Compared with AD7960BCPZ-RL7 and ADS8860IRGET, the LTC2323CUFD-14#TRPBF uniquely combines dual-channel 5 Msps sampling, integrated dual reference buffers, and LVDS/CMOS interface flexibility in a single 4 mm × 5 mm package - reducing PCB area, BOM count, and timing design effort for high-channel-density DAQ systems.
Availability
LTC2323CUFD-14#TRPBF is available at Aetrix Electronics and suitable for high-speed data acquisition systems, optical networking monitoring, and multiphase motor control requiring stable component supply, extended temperature operation, and long-term production continuity.
Supply support for LTC2323CUFD-14#TRPBF 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#TRPBF belongs to the Linear Technology high-speed precision ADC product line, designed specifically for applications demanding simultaneous dual-channel sampling, low noise, and minimal external component count in space-constrained environments.
FAQ
What is the maximum operating temperature for the LTC2323CUFD-14#TRPBF?
The LTC2323CUFD-14#TRPBF is rated for 0°C to 70°C operation (C-grade). Its absolute maximum junction temperature is 125°C, and thermal resistance θJA is 43°C/W. For extended temperature applications, consider the I-grade (–40°C to 85°C) or H-grade (–40°C to 125°C) variants - the LTC2323CUFD-14#TRPBF itself is not qualified beyond 70°C.
Does the LTC2323CUFD-14#TRPBF require external reference components?
No. The LTC2323CUFD-14#TRPBF integrates two independent, low-drift (≤20 ppm/°C) reference buffers delivering 2.048 V or 4.096 V. External decoupling (10 µF + 0.1 µF ceramics) is required per REFOUT pin, but no external reference IC or resistor network is needed unless using an external reference - which is enabled by grounding REFINT.
How does the LTC2323CUFD-14#TRPBF handle pseudo-differential input configurations?
The LTC2323CUFD-14#TRPBF natively supports pseudo-differential unipolar (0 to REFOUT) and bipolar (±REFOUT/2) modes without hardware changes. When AIN1– is grounded and AIN1+ carries a 0–4.096 V signal, it produces 0x0000–0x7FFF codes; when AIN1– is biased at 2.048 V and AIN1+ swings ±2.048 V, it yields two's complement codes from 0x8000–0x7FFF - all with guaranteed 14-bit no-missing-codes performance.
Can the LTC2323CUFD-14#TRPBF interface directly with a 1.8 V FPGA I/O bank?
Yes. The LTC2323CUFD-14#TRPBF supports OVDD from 1.71 V to 2.5 V. Setting OVDD = 1.8 V configures CMOS-mode SDO, SCK, and CLKOUT outputs to 1.8 V logic levels, compatible with standard 1.8 V FPGA I/O banks. LVDS mode requires OVDD = 2.5 V and differential 100 Ω termination.
What is the significance of "14-bit + sign" resolution in the LTC2323CUFD-14#TRPBF?
"14-bit + sign" means the LTC2323CUFD-14#TRPBF outputs a 15-bit two's complement code: 1 sign bit + 14 magnitude bits. With a 4.096 V reference, this yields 32,768 codes spanning –4.096 V to +4.096 V (full-scale differential range), giving a 250 µV LSB step size - enabling precise bipolar signal digitization without external offset adjustment.
LTC2323CUFD-14#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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#TRPBF FAQ
1.How can I place an order for LTC2323CUFD-14#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2323CUFD-14#TRPBF 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#TRPBF reliable?
The price and inventory of LTC2323CUFD-14#TRPBF 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#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2323CUFD-14#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2323CUFD-14#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2323CUFD-14#TRPBF?
LTC2323CUFD-14#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2323CUFD-14#TRPBF 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#TRPBF?
For technical support, including LTC2323CUFD-14#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2323CUFD-14#TRPBF requirements.
6.How does Aetrix verify that LTC2323CUFD-14#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2323CUFD-14#TRPBF 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#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2323CUFD-14#TRPBF?
All LTC2323CUFD-14#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2323CUFD-14#TRPBF, 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#TRPBF part is unused and in its original packaging.
Return procedure for LTC2323CUFD-14#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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