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Analog Devices Inc. LTC2297IUP#PBF
- Part No.:
- LTC2297IUP#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-WFQFN Exposed Pad
- Datasheet:
-
LTC2297IUP#PBF.pdf
- Description:
- IC ADC 14BIT PIPELINED 64QFN
- Quantity:
- Payment:
- Shipping:
Inventory:312
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Product details
Overview
LTC2297IUP#PBF from Analog Devices (formerly Linear Technology) is a dual 14-bit, 40Msps low-power analog-to-digital converter operating from a single 3V supply (2.7V–3.4V), delivering 74.4dB SNR and 90dB SFDR at 5MHz input with 110dB channel isolation at 100MHz. It supports flexible differential or single-ended analog inputs (±0.5V to ±1V range), features integrated clock duty cycle stabilization, and targets high-fidelity signal digitization in communications and imaging systems.
For engineers reviewing the LTC2297IUP#PBF datasheet, LTC2297IUP#PBF pinout, LTC2297IUP#PBF application, or LTC2297IUP#PBF equivalent, key selection criteria include its guaranteed ±1.2LSB INL and ±0.5LSB DNL over temperature, 575MHz full-power bandwidth, multiplexed/parallel output bus options, and –40°C to +85°C industrial-grade operation in a 64-pin QFN package.
Technical Context
The LTC2297IUP#PBF implements a six-stage CMOS pipelined ADC architecture with internal 1.5V reference buffers and independent channel A/B sample-and-hold circuits. Each channel uses dedicated REFH/REFL pins and SENSE/VCMA/VCMB programming for ±0.5V or ±1V input ranges, enabling precise DC-coupled or AC-coupled front-end design.
It supports dual independent clock inputs (CLKA/CLKB) or synchronized operation via shared CLK and MUX control, with configurable output format (offset binary or 2's complement) and shutdown modes (Nap, Sleep, Hi-Z). The duty cycle stabilizer operates per-channel and is enabled via MODE pin voltage level, ensuring stable timing performance across varying input clock duty cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with no missing codes - guarantees monotonicity and full code coverage across temperature. |
| Sample Rate | 40Msps - defines maximum Nyquist bandwidth of 20MHz for baseband sampling or IF digitization. |
| SNR @ 5MHz | 74.4dB (typ) - enables >12-bit effective resolution for narrowband signals in receiver chains. |
| SFDR @ 5MHz | 90dB (typ) - suppresses spurious tones critical for multi-carrier communication systems. |
| Channel Isolation | –110dB at 100MHz - prevents crosstalk-induced distortion in dual-channel synchronous sampling. |
| Power Dissipation | 235mW (typ) at 40Msps - allows thermal management in space-constrained portable instrumentation. |
| Input Bandwidth | 575MHz full-power - supports direct sampling of VHF/UHF IF signals without external amplification. |
Pinout & Package
Package: 64-lead (9mm × 9mm) plastic QFN with exposed pad (Pin 65 = GND), θJA = 20°C/W, TJMAX = 125°C. Requires soldering of exposed pad to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AINA+, AINA– | Channel A differential analog input | Accepts ±0.5V or ±1V differential signal; requires matched trace routing and common-mode bias via VCMA. |
| CLKA, CLKB | Independent channel clock inputs | Positive-edge triggered; supports asynchronous sampling or synchronized dual-channel acquisition. |
| DA0–DA13, DB0–DB13 | Parallel digital outputs (MSB first) | Configurable 14-bit LVCMOS outputs; OVDD supports 0.5V–3.6V logic interfacing. |
| MUX (Pin 21) | Digital bus multiplexer control | Selects output mapping: MUX = H → DA/DB assigned to Channel A/B; MUX = L → swapped for time-interleaved bus sharing. |
| SHDNA, SHDNB | Per-channel shutdown control | Combines with OEA/OEB to enable Nap mode (15mW/channel) or Sleep mode (2mW/channel). |
| MODE (Pin 60) | Output format & duty cycle stabilizer | Voltage-selectable: GND = offset binary + DCS off; 1/3VDD = offset binary + DCS on; 2/3VDD = 2's complement + DCS on. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent ADC cores | Enables simultaneous sampling of two RF/IF paths without interleaving artifacts or timing skew. |
| Programmable input range | SENSEA/SENSEB pins select ±0.5V (for low-noise baseband) or ±1V (for higher dynamic range) full-scale swing. |
| Integrated clock duty cycle stabilizer | Compensates for asymmetric clock waveforms, maintaining SNR/SFDR performance without external conditioning circuitry. |
| Flexible output bus configuration | MUX pin allows either separate 14-bit buses or time-multiplexed 14-bit output on one bus-reducing FPGA I/O count. |
| Industrial temperature grade | –40°C to +85°C operation with guaranteed INL/DNL and SNR specs ensures reliability in deployed equipment. |
Applications
| Wireless Base Station Receiver | Medical Ultrasound Beamformer |
|---|---|
Use Scenario: Digitizing dual-channel IF signals (e.g., 70MHz/140MHz) from quadrature downconverters in LTE/NR macrocell receivers. IC Role / Device Role / Timing Role: Dual 14-bit ADC core performing synchronous sampling with <1ps aperture jitter, feeding FPGA-based digital downconversion and channel equalization. Use Value: 90dB SFDR rejects adjacent-channel interference; 110dB channel isolation preserves I/Q orthogonality in zero-IF architectures. | Use Scenario: Capturing echo return signals from phased-array transducers in portable ultrasound systems with real-time beamforming. IC Role / Device Role / Timing Role: High-fidelity digitizer for time-aligned receive channels, supporting 20+ MHz bandwidth imaging with minimal harmonic distortion. Use Value: 74.4dB SNR enables detection of weak tissue echoes; low 235mW power allows battery-operated handheld designs. |
| Spectral Monitoring Receiver | Portable Test & Measurement Equipment |
Use Scenario: Real-time spectrum analysis across 0–100MHz using dual-channel FFT processing for EMI pre-compliance testing. IC Role / Device Role / Timing Role: Dual ADC capturing parallel time-domain samples for overlapping FFT windows, leveraging 575MHz input bandwidth for wide instantaneous capture. Use Value: 575MHz full-power bandwidth avoids anti-alias filter complexity; 14-bit resolution supports >80dB dynamic range in swept measurements. | Use Scenario: Embedded digitizer in handheld oscilloscopes or signal analyzers requiring compact size and low thermal footprint. IC Role / Device Role / Timing Role: Main acquisition engine with programmable input range and on-chip reference, interfacing directly to analog front-end op-amps. Use Value: Single 3V supply simplifies power design; QFN package enables dense PCB layouts; Nap mode reduces standby power during idle periods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9257BCPZ-40 | 14-bit, 40Msps dual ADC from Analog Devices; lower 73.2dB SNR, no integrated duty cycle stabilizer, requires external reference. | Higher noise floor limits use in ultra-low-distortion receivers; lacks on-chip clock conditioning for noisy system clocks. | Choose when cost sensitivity outweighs need for highest SNR or when external clock cleanup is already implemented. |
| LTC2292IUP#PBF | 12-bit, 40Msps dual ADC in same QFN package; 70.5dB SNR, 85dB SFDR, lower 150mW power. | Reduced resolution trades dynamic range for lower power and cost in less demanding applications like basic data logging. | Choose for non-critical measurement where 12-bit resolution suffices and power budget is tighter than 235mW. |
Compared with AD9257BCPZ-40 and LTC2292IUP#PBF, the LTC2297IUP#PBF delivers superior SNR and integrated clock stabilization-critical for high-fidelity communications receivers-while maintaining pin-compatible packaging with the LTC2292IUP#PBF for layout reuse in upgrade paths.
Availability
LTC2297IUP#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 industrial temperature performance.
Supply support for LTC2297IUP#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 semiconductors, serving precision instrumentation, communications, and industrial markets.
The LTC2297IUP#PBF belongs to ADI's high-speed precision ADC product line, engineered for demanding digitization tasks where SNR, SFDR, and channel matching are critical-especially in communications receivers and medical imaging front-ends.
FAQ
What is the guaranteed integral nonlinearity (INL) specification for LTC2297IUP#PBF over temperature?
The LTC2297IUP#PBF guarantees ±1.2LSB typical integral nonlinearity over its full industrial temperature range of –40°C to +85°C, measured with differential analog input and 2VP-P range. This specification ensures monotonic transfer characteristics and accurate amplitude fidelity in precision measurement applications.
Does LTC2297IUP#PBF support single-ended analog inputs?
Yes, the LTC2297IUP#PBF supports single-ended analog inputs per channel, though differential drive is recommended for optimal harmonic distortion and SNR performance. When configured for single-ended operation, the common-mode voltage must be set between 0.5V and 2.0V using the SENSE and VCM pins, and SNR degrades by approximately 1–2dB compared to differential mode.
How does the MODE pin configure output format and clock duty cycle stabilization on LTC2297IUP#PBF?
The MODE pin on LTC2297IUP#PBF selects both output coding and duty cycle stabilizer (DCS) state: GND → offset binary + DCS off; 1/3VDD → offset binary + DCS on; 2/3VDD → 2's complement + DCS on; VDD → 2's complement + DCS off. This dual-function control simplifies PCB routing by eliminating separate configuration lines.
What is the minimum and maximum supply voltage for LTC2297IUP#PBF's analog VDD and digital OVDD rails?
The LTC2297IUP#PBF requires analog VDD between 2.7V and 3.4V, and digital OVDD between 0.5V and 3.6V. These independent supplies allow interfacing with diverse logic families (e.g., 1.8V FPGA I/O) while maintaining analog performance, and both rails must be bypassed with 0.1µF ceramic capacitors close to their respective pins.
Can LTC2297IUP#PBF operate with only one channel active while the other is powered down?
Yes, LTC2297IUP#PBF supports independent per-channel shutdown via SHDNA/SHDNB and OEA/OEB pins. With one channel in Nap mode (15mW) and the other active, total power drops to ~250mW - significantly lower than full dual-channel operation (235mW × 2 = 470mW), enabling dynamic power scaling in burst-mode acquisition systems.
LTC2297IUP#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 64-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 40M
- 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:
- 2.7V ~ 3.4V
- Voltage - Supply, Digital:
- 2.7V ~ 3.4V
- Features:
- Simultaneous Sampling
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 64-QFN (9x9)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2297IUP#PBF FAQ
1.How can I place an order for LTC2297IUP#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2297IUP#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 LTC2297IUP#PBF reliable?
The price and inventory of LTC2297IUP#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2297IUP#PBF is usually 5 days.
3.What payment methods are accepted for LTC2297IUP#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2297IUP#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2297IUP#PBF?
LTC2297IUP#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2297IUP#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 LTC2297IUP#PBF?
For technical support, including LTC2297IUP#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2297IUP#PBF requirements.
6.How does Aetrix verify that LTC2297IUP#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2297IUP#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 LTC2297IUP#PBF meets industry standards.
7.What is the process for return or replacement of LTC2297IUP#PBF?
All LTC2297IUP#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2297IUP#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 LTC2297IUP#PBF part is unused and in its original packaging.
Return procedure for LTC2297IUP#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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