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Analog Devices Inc. LTC2280CUP#PBF
- Part No.:
- LTC2280CUP#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-WFQFN Exposed Pad
- Datasheet:
-
LTC2280CUP#PBF.pdf
- Description:
- IC ADC 10BIT PIPELINED 64QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,932
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Product details
Overview
LTC2280CUP#PBF from Analog Devices (formerly Linear Technology) is a dual 10-bit, 105Msps low-noise analog-to-digital converter designed for high-frequency signal digitization in demanding communications and imaging systems. It operates from a single 3V supply (2.85V–3.4V), delivers 61.6dB SNR and 85dB SFDR at Nyquist, and features 110dB channel isolation at 100MHz - enabling simultaneous high-fidelity sampling of two independent RF or IF signals.
For engineers reviewing the LTC2280CUP#PBF datasheet, LTC2280CUP#PBF pinout, LTC2280CUP#PBF application, or LTC2280CUP#PBF equivalent, key selection considerations include its dual-channel pipelined architecture, flexible ±0.5V to ±1V differential input range, clock duty cycle stabilizer, and QFN-64 package with exposed thermal pad requiring PCB soldering.
Technical Context
The LTC2280CUP#PBF implements a six-stage CMOS pipelined ADC core per channel, achieving 105Msps sample rate with 5-cycle pipeline latency. Each channel includes independent sample-and-hold, reference buffers, and output drivers, with shared clock inputs (CLKA/CLKB) and multiplexed digital outputs controlled by the MUX pin.
It integrates a 1.5V internal common-mode bias (VCMA/VCMB), programmable input range via SENSEA/SENSEB pins, and configurable output format (offset binary or 2's complement) and clock duty cycle stabilization via the MODE pin - all supporting precise, low-jitter acquisition of wideband signals up to 575MHz full-power bandwidth.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit with no missing codes - guarantees monotonic transfer function for accurate code mapping across full dynamic range. |
| Sample Rate | 105Msps maximum - supports real-time digitization of signals up to ~52.5MHz Nyquist bandwidth per channel. |
| SNR | 61.6dBFS at 5MHz input - defines usable dynamic range for low-noise baseband or IF sampling applications. |
| SFDR | 85dBc at 5MHz input - indicates spurious-free performance critical for spectral analysis and communication receiver front ends. |
| Channel Isolation | –110dB at 100MHz - ensures minimal crosstalk between channels during simultaneous high-frequency signal capture. |
| Input Bandwidth | 575MHz full-power - enables direct sampling of L-band and lower S-band RF signals without downconversion. |
| Power Dissipation | 540mW at 105Msps - balances high-speed performance with thermal manageability in compact QFN-64 packages. |
Pinout & Package
Package: 64-lead (9mm × 9mm) plastic QFN with exposed thermal pad (Pin 65 = GND), rated for 0°C to 70°C operating temperature (C-grade).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AINA+, AINA– | Channel A differential analog input | Accepts ±0.5V to ±1V differential signal; requires matched 100Ω source impedance for optimal SFDR. |
| CLKA, CLKB | Independent channel clock inputs | Positive-edge triggered; support asynchronous or synchronized sampling; duty cycle stabilizer enabled via MODE pin. |
| DA0–DA9, DB0–DB9 | Parallel digital outputs (MSB-first) | CMOS-compatible; output voltage swing referenced to OVDD (0.5V–3.6V); tri-state controlled by OEA/OEB. |
| SENSEA, SENSEB | Input range programming pins | Select ±0.5V (tie to VCMA/VCMB), ±1V (tie to VDD), or custom range (external 0.5V–1V reference). |
| MODE | Output format & duty cycle control | GND = offset binary + stabilizer off; 1/3 VDD = offset binary + stabilizer on; 2/3 VDD = 2's complement + stabilizer on. |
| SHDNA, SHDNB | Per-channel shutdown control | Enable nap mode (low power, outputs high-Z) or sleep mode (ultra-low power, outputs high-Z) independently per channel. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 10-bit ADC cores | Enables time-aligned, isolated sampling of two RF/IF paths without external multiplexing or timing skew compensation. |
| 575MHz full-power analog input bandwidth | Supports direct RF sampling in wireless infrastructure, radar, and spectrum analyzers without image-reject filtering overhead. |
| 110dB channel-to-channel isolation at 100MHz | Prevents signal leakage between channels in multi-antenna or I/Q receiver architectures, preserving signal integrity. |
| Configurable clock duty cycle stabilizer | Compensates for non-50% clock duty cycles - essential for maintaining SNR/SFDR when using PLL-based or divider-derived clocks. |
| Flexible 0.5V–3.6V output supply (OVDD) | Allows interface to diverse logic families (LVCMOS, LVTTL, or low-voltage ASICs) without level-shifting circuitry. |
| Integrated 1.5V common-mode bias (VCMA/VCMB) | Provides precision DC reference for transformer-coupled or op-amp-driven differential inputs, reducing external component count. |
Applications
| Wireless Base Station Receiver | Medical Ultrasound Beamforming |
|---|---|
Use Scenario: Digitizing dual I/Q downconverted signals from RF front end in LTE/5G macrocell base stations. IC Role / Device Role / Timing Role: Dual-channel ADC capturing parallel I and Q data streams at 105Msps with <0.2ps RMS aperture jitter to preserve EVM and ACLR. Use Value: 61.6dB SNR and 85dB SFDR ensure clean demodulation of 256-QAM waveforms; 110dB isolation prevents I/Q crosstalk-induced image distortion. |
Use Scenario: Simultaneous sampling of echo return signals from multiple transducer elements in phased-array ultrasound systems. IC Role / Device Role / Timing Role: High-speed dual ADC acquiring time-aligned RF echoes from adjacent beam paths with sub-nanosecond inter-channel skew. Use Value: 575MHz input bandwidth supports wideband pulse-echo reception; low 0.08LSBRMS transition noise improves B-mode image contrast resolution. |
| Spectral Analysis Instrumentation | Portable Communications Test Equipment |
Use Scenario: Real-time FFT-based spectrum monitoring across 0–50MHz span in handheld RF analyzers and EMI receivers. IC Role / Device Role / Timing Role: Dual ADC feeding parallel processing pipelines for overlapping FFT windows and real-time peak detection. Use Value: 105Msps sample rate enables 52.5MHz instantaneous bandwidth; 61.6dB SNR ensures accurate amplitude measurement of weak signals near noise floor. |
Use Scenario: Embedded digitization in battery-powered field test sets verifying 802.11ac/ax WLAN transceivers and Bluetooth LE modems. IC Role / Device Role / Timing Role: Low-power dual ADC performing IQ calibration and modulation accuracy analysis with integrated nap/shutdown modes. Use Value: 15mW nap mode per channel extends battery life; 540mW active power enables high-performance operation within thermal limits of handheld enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2282CUP#PBF | 12-bit resolution, same 105Msps rate, higher 66.5dB SNR but 50mW higher power (590mW). | Better dynamic range for high-precision instrumentation; less suitable for power-constrained portable designs. | Choose when 2-bit resolution gain justifies added power and cost; pin-compatible but requires layout review for thermal management. |
| AD9233BCPZ-105 | Single-channel 12-bit, 105Msps; no dual-channel integration; requires external clock distribution and data alignment. | Higher channel density needed? Requires two devices and FPGA logic for synchronization - increases BOM and board area. | Use only if system already employs ADI's JESD204B ecosystem; not drop-in - redesign required for dual-channel timing and routing. |
Compared with LTC2280CUP#PBF, LTC2282CUP#PBF offers higher resolution at identical speed but increased power, while AD9233BCPZ-105 provides superior single-channel specs but forces system-level duplication and synchronization complexity - making LTC2280CUP#PBF optimal for space- and power-sensitive dual-path digitization.
Availability
LTC2280CUP#PBF is available at Aetrix Electronics and suitable for wireless infrastructure, medical imaging, and portable test equipment requiring stable component supply, long-term lifecycle support, and guaranteed C-grade temperature performance (0°C to 70°C).
Supply support for LTC2280CUP#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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC2280 belongs to ADI's high-speed precision ADC product line, engineered specifically for demanding dual-channel digitization in communications receivers, spectral analysis, and medical ultrasound - emphasizing low noise, high isolation, and flexible interface design.
FAQ
What is the operating temperature range for the LTC2280CUP#PBF?
The LTC2280CUP#PBF is the commercial-grade variant, specified for operation from 0°C to 70°C ambient temperature. This grade is validated for use in non-automotive, non-military environments such as base station radios, lab instruments, and portable test gear where extended industrial or automotive temperature ranges are not required. The device's thermal pad (Pin 65) must be soldered to PCB ground for reliable operation within this range.
Does the LTC2280CUP#PBF support single-ended analog input drive?
Yes, the LTC2280CUP#PBF supports single-ended input drive: connect the signal to AIN+ and tie AIN– to the 1.5V VCM pin. However, this configuration degrades harmonic distortion and INL performance compared to differential drive - SNR and DNL remain unaffected. For optimal SFDR and THD, differential drive with matched 100Ω source impedance is strongly recommended per the datasheet's Figure 3 and Figure 5 guidance.
How does the MODE pin affect the LTC2280CUP#PBF's output format and clock functionality?
The MODE pin on the LTC2280CUP#PBF controls both output data format and clock duty cycle stabilization. Grounding MODE selects offset binary output with stabilizer disabled; applying 1/3 VDD enables offset binary with stabilizer active; 2/3 VDD selects 2's complement with stabilizer on; and tying MODE to VDD gives 2's complement with stabilizer off. This single-pin control simplifies system-level configuration without requiring additional GPIO resources.
What is the purpose of the exposed thermal pad (Pin 65) on the LTC2280CUP#PBF QFN package?
Pin 65 is the exposed thermal pad on the LTC2280CUP#PBF's 64-lead QFN package and must be soldered directly to the PCB ground plane. It serves as the primary thermal conduction path to dissipate the device's 540mW power dissipation, ensuring junction temperature remains within safe limits (TJMAX = 125°C). Failure to solder this pad risks thermal runaway, parametric drift, and premature failure - per datasheet Section "PACKAGE/ORDER INFORMATION" and Figure 2280 TA01.
Can the LTC2280CUP#PBF operate with separate analog and digital supplies?
No - the LTC2280CUP#PBF uses a single 3V analog supply (VDD = 2.85V–3.4V) for both analog core and digital logic, but it provides a separate output driver supply (OVDD = 0.5V–3.6V) to interface with diverse logic families. This architecture decouples output voltage levels from the analog supply, allowing direct connection to 1.8V, 2.5V, or 3.3V ASICs/FPGAs without level shifters, while maintaining analog performance stability through the unified VDD rail.
LTC2280CUP#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 64-WFQFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 105M
- Number of Inputs:
- 2
- Input Type:
- Differential, Single Ended
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 2
- Architecture:
- Pipelined
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 2.85V ~ 3.4V
- Voltage - Supply, Digital:
- 2.85V ~ 3.4V
- Features:
- Simultaneous Sampling
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 64-QFN (9x9)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2280CUP#PBF FAQ
1.How can I place an order for LTC2280CUP#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2280CUP#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 LTC2280CUP#PBF reliable?
The price and inventory of LTC2280CUP#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2280CUP#PBF is usually 5 days.
3.What payment methods are accepted for LTC2280CUP#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2280CUP#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2280CUP#PBF?
LTC2280CUP#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2280CUP#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 LTC2280CUP#PBF?
For technical support, including LTC2280CUP#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2280CUP#PBF requirements.
6.How does Aetrix verify that LTC2280CUP#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2280CUP#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 LTC2280CUP#PBF meets industry standards.
7.What is the process for return or replacement of LTC2280CUP#PBF?
All LTC2280CUP#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2280CUP#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 LTC2280CUP#PBF part is unused and in its original packaging.
Return procedure for LTC2280CUP#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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