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Analog Devices Inc. LTC2203IUK#PBF
- Part No.:
- LTC2203IUK#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
LTC2203IUK#PBF.pdf
- Description:
- IC ADC 16BIT PIPELINED 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:252
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Product details
Overview
LTC2203IUK#PBF from Analog Devices (formerly Linear Technology) is a 16-bit, 25Msps high-speed analog-to-digital converter optimized for digitizing wide dynamic range signals up to 380MHz full-power bandwidth. It features an integrated PGA front end (selectable 2.5VP-P or 1.667VP-P input range), 81.6dB SNR at 1MHz, 100dB SFDR, and ±4LSB INL - deployed in cellular base station receivers and spectrum analyzers requiring precision RF sampling.
For engineers reviewing the LTC2203IUK#PBF datasheet, LTC2203IUK#PBF pinout, LTC2203IUK#PBF application, or LTC2203IUK#PBF equivalent, key selection criteria include its 25Msps sampling rate, 380MHz S/H bandwidth, internal dither capability, CMOS output swing adjustable from 0.5V to 3.6V, and industrial-grade –40°C to +85°C operation.
Technical Context
The LTC2203IUK#PBF implements a 16-bit pipelined ADC core with integrated sample-and-hold amplifier and programmable gain amplifier (PGA), enabling direct RF sampling without external IF downconversion. Its clock duty cycle stabilizer ensures consistent performance across 5–50% input clock duty cycles.
It supports dual reference modes via the SENSE pin: internal 2.5V bandgap (SENSE tied to VDD) or external 1.25V/2.5V reference. The VCM pin provides a stable 1.25V common-mode bias, and the out-of-range (OF) flag indicates input saturation during acquisition.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes - guarantees monotonic transfer function for accurate signal reconstruction. |
| Sampling Rate | 25Msps - enables Nyquist-limited capture of signals up to 12.5MHz without aliasing in baseband applications. |
| SNR | 81.6dBFS at 1MHz input (2.5V range, PGA = 0) - supports >13 effective bits for high-fidelity waveform digitization. |
| SFDR | 100dBc at 1MHz (2nd/3rd harmonic), 90dBc at 70MHz - critical for detecting weak signals adjacent to strong interferers. |
| Full-Power Bandwidth | 380MHz - allows direct sampling of IF signals up to UHF bands without external amplification or filtering. |
| Power Dissipation | 220mW at 25Msps - balances performance and thermal management in dense RF subsystems. |
| Operating Temperature | –40°C to +85°C - qualified for industrial and outdoor wireless infrastructure deployments. |
Pinout & Package
48-lead (7mm × 7mm) plastic QFN package with exposed GND pad (Pin 49). Requires soldering to PCB for thermal and electrical integrity. θJA = 29°C/W, TJMAX = 150°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN+, AIN– | Differential analog input | Accepts 1.667VP-P or 2.5VP-P differential signal; common-mode voltage referenced to VCM (1.25V). |
| CLK | Sampling clock input | Falling edge initiates hold phase; rising edge latches output data - supports duty cycle stabilization. |
| D0–D15 | Parallel CMOS digital outputs | 16-bit two's complement data bus; output swing configurable via OVDD (0.5V–3.6V). |
| OF | Out-of-range indicator | Active-high flag signaling analog input saturation - used for automatic gain control or clipping detection. |
| SHDN | Power shutdown control | Low = active; high = analog core powered down, digital outputs tri-stated - reduces idle power to 2mW. |
| VCM | Common-mode bias output | 1.25V reference for input termination networks; requires ≥2.2μF ceramic bypass to GND. |
| SENSE | Reference mode select | Tied to VDD selects internal 2.5V reference; external 1.25V/2.5V reference supported for improved accuracy. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated PGA front end | Configurable 2.5VP-P or 1.667VP-P input range - eliminates need for external gain stages in variable-signal environments. |
| Internal dither enable (DITH) | Reduces harmonic distortion and improves SFDR by >10dB at low input levels - critical for spectral purity in ATE. |
| Data output randomizer (RAND) | Minimizes deterministic pattern noise on parallel bus - suppresses radiated emissions and crosstalk in high-density layouts. |
| Separate OVDD supply | Allows CMOS output interface to match host logic (1.8V/2.5V/3.3V) without level shifters - simplifies FPGA/ASIC interfacing. |
| CLK duty cycle stabilizer | Enables full-performance operation with asymmetric clocks (5–50% duty cycle) - relaxes clock generation requirements. |
Applications
| Cellular Base Station Receiver | Spectrum Analyzer Front End |
|---|---|
|
Use Scenario: Digitizing 70MHz IF signals from multi-carrier LTE transceivers in remote radio heads. IC Role / Device Role / Timing Role: Primary ADC capturing wide instantaneous bandwidth for digital predistortion and channel estimation. Use Value: 380MHz full-power bandwidth and 100dB SFDR enable simultaneous capture of multiple 20MHz LTE carriers without guard-band filtering. |
Use Scenario: High-resolution frequency-domain analysis of RF emissions in EMC test equipment. IC Role / Device Role / Timing Role: Signal acquisition engine feeding FFT processors in real-time spectrum monitoring systems. Use Value: 81.6dB SNR and optional internal dither ensure detection of signals >100dB below carrier - meeting CISPR Class B sensitivity requirements. |
| ATE for RF Power Amplifiers | Medical Ultrasound Beamformer |
|
Use Scenario: Capturing transient distortion artifacts during PA characterization under modulated LTE/NR waveforms. IC Role / Device Role / Timing Role: Precision digitizer synchronized to stimulus generator for time-aligned I/Q error vector analysis. Use Value: ±4LSB INL and 25Msps sampling support <1% ENOB error in EVM measurements up to 12.5MHz modulation bandwidth. |
Use Scenario: Sampling echo return signals from phased-array transducers operating at 5–15MHz center frequencies. IC Role / Device Role / Timing Role: Channel ADC in multi-channel receive beamforming ASICs requiring matched gain and timing. Use Value: Pin-compatible family (LTC2202/LTC2203) enables scalable channel count; PGA allows dynamic range optimization per channel. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9268BCPZ-20EBZ | 16-bit, 20Msps; JESD204B serial interface; higher power (340mW); 75dB SNR at 10MHz. | Targets space-constrained systems needing reduced pin count; less suitable for parallel-bus FPGA interfaces. | Select when serial interface and lower pin count outweigh SNR/SFDR trade-offs. |
| LTC2202IUK#PBF | Same pinout/package; 10Msps; lower power (140mW); identical AC specs at reduced rate. | Used where lower sampling rate suffices (e.g., narrowband IF, legacy standards); shares layout and firmware compatibility. | Choose for cost-sensitive or thermally constrained designs where 10Msps meets system bandwidth needs. |
Compared with AD9268BCPZ-20EBZ and LTC2202IUK#PBF, the LTC2203IUK#PBF delivers the highest sampling rate and best SFDR in its footprint, making it optimal for wideband RF digitization where parallel interface and thermal headroom permit.
Availability
LTC2203IUK#PBF is available at Aetrix Electronics and suitable for cellular infrastructure, spectrum analysis, automated test equipment, and medical ultrasound systems requiring stable component supply across extended temperature ranges.
Supply support for LTC2203IUK#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and RF ICs for precision signal processing.
The LTC2203IUK#PBF belongs to the LTC220x ultra-low-noise, high-SFDR ADC family designed specifically for demanding communications and instrumentation applications requiring direct RF sampling.
FAQ
What is the maximum analog input frequency supported by the LTC2203IUK#PBF?
The LTC2203IUK#PBF supports a full-power bandwidth of 380MHz, meaning it can accurately digitize analog inputs with fundamental frequencies up to 380MHz while maintaining specified SNR and SFDR performance. This makes the LTC2203IUK#PBF suitable for direct sampling of UHF band signals without intermediate frequency conversion.
Does the LTC2203IUK#PBF require an external reference voltage?
No - the LTC2203IUK#PBF includes an internal 2.5V bandgap reference. When the SENSE pin is tied to VDD (≤1kΩ), the device uses this internal reference to set a 2.5V full-scale range. An external 1.25V or 2.5V reference may be applied to SENSE for improved accuracy or system-level reference synchronization, but it is not required for basic operation of the LTC2203IUK#PBF.
How does the PGA front end affect input range and dynamic range in the LTC2203IUK#PBF?
The LTC2203IUK#PBF's PGA supports two input ranges: 2.5VP-P (PGA = 0) and 1.667VP-P (PGA = 1). Selecting PGA = 1 increases gain by ~3.5dB, improving SNR for small signals but reducing headroom. At 1.667VP-P, the LTC2203IUK#PBF maintains 79.4dB SNR and 100dB SFDR at 1MHz - preserving dynamic range while optimizing for low-amplitude RF inputs.
Can the LTC2203IUK#PBF operate with a non-50% clock duty cycle?
Yes - the LTC2203IUK#PBF includes an optional clock duty cycle stabilizer that enables full AC performance (81.6dB SNR, 100dB SFDR) across input clock duty cycles from 5% to 50%. When enabled, the stabilizer internally generates a symmetrical clock, relaxing requirements on external clock sources and simplifying system timing design for the LTC2203IUK#PBF.
What is the purpose of the OF (out-of-range) pin on the LTC2203IUK#PBF?
The OF pin on the LTC2203IUK#PBF is an active-high indicator that asserts when the analog input exceeds the selected full-scale range - signaling saturation of the sample-and-hold or ADC core. This flag is used in closed-loop AGC systems or diagnostic firmware to trigger gain adjustment or alert conditions, ensuring signal integrity is maintained across varying input amplitudes in the LTC2203IUK#PBF.
LTC2203IUK#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 48-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 25M
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- Pipelined
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 3.135V ~ 3.465V
- Voltage - Supply, Digital:
- 3.135V ~ 3.465V
- Features:
- PGA
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 48-QFN (7x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2203IUK#PBF FAQ
1.How can I place an order for LTC2203IUK#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2203IUK#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 LTC2203IUK#PBF reliable?
The price and inventory of LTC2203IUK#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2203IUK#PBF is usually 5 days.
3.What payment methods are accepted for LTC2203IUK#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2203IUK#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2203IUK#PBF?
LTC2203IUK#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2203IUK#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 LTC2203IUK#PBF?
For technical support, including LTC2203IUK#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2203IUK#PBF requirements.
6.How does Aetrix verify that LTC2203IUK#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2203IUK#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 LTC2203IUK#PBF meets industry standards.
7.What is the process for return or replacement of LTC2203IUK#PBF?
All LTC2203IUK#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2203IUK#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 LTC2203IUK#PBF part is unused and in its original packaging.
Return procedure for LTC2203IUK#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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