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Analog Devices Inc. LTC2203CUK#PBF
- Part No.:
- LTC2203CUK#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
LTC2203CUK#PBF.pdf
- Description:
- IC ADC 16BIT PIPELINED 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:279
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Product details
Overview
LTC2203CUK#PBF from Analog Devices (acquired 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 a programmable gain amplifier (PGA) front end, 81.6dB SNR at 1MHz input, 100dB spurious-free dynamic range (SFDR), and ±4LSB integral nonlinearity - deployed in cellular base station receivers and spectrum analyzers.
For engineers reviewing the LTC2203CUK#PBF datasheet, LTC2203CUK#PBF pinout, LTC2203CUK#PBF application, or LTC2203CUK#PBF equivalent, key selection considerations include its 25Msps sampling rate, differential analog input with 1.667VP-P or 2.5VP-P range selection via PGA, CMOS output swing adjustable from 0.5V to 3.6V, clock duty cycle stabilizer support, and out-of-range indicator functionality.
Technical Context
The LTC2203CUK#PBF employs a 16-bit pipelined ADC core with integrated sample-and-hold (S/H) and correction logic, supporting single-ended clock input with optional internal duty cycle stabilization. Its PGA front end enables input range optimization between 1.667VP-P and 2.5VP-P while maintaining 380MHz full-power bandwidth.
It delivers AC performance of 81.6dB SNR and 100dB SFDR at 1MHz input (2.5V range, PGA = 0), with SFDR degrading to 85dB at 70MHz. DC accuracy includes ±4LSB INL and ±1LSB DNL (no missing codes), and it operates from a single 3.3V analog supply with separate 0.5V–3.6V digital output supply (OVDD).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes - guarantees monotonic transfer function for precision measurement systems. |
| Sampling Rate | 25Msps - supports real-time digitization of IF signals up to 380MHz bandwidth in communications receivers. |
| SNR | 81.6dBFS at 1MHz input (2.5V range, PGA = 0) - enables high-fidelity signal capture in spectrum analysis applications. |
| SFDR | 100dBc at 1MHz input (2.5V range, PGA = 0); 85dBc at 70MHz - critical for detecting weak signals adjacent to strong interferers. |
| INL / DNL | ±4LSB / ±1LSB - ensures accurate amplitude linearity for calibration-critical instrumentation and ATE systems. |
| Power Dissipation | 220mW at 25Msps - balances performance and thermal management in compact RF front-end designs. |
| Input Bandwidth | 380MHz full-power bandwidth - allows direct sampling of L-band and lower S-band RF signals without downconversion. |
Pinout & Package
Package: 48-lead (7mm × 7mm) plastic QFN with exposed pad (Pin 49 = GND). Requires soldering of exposed pad 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 set by VCM pin (1.25V typical). |
| CLK | Sampling clock input | Falling edge initiates S/H hold phase; rising edge may latch output data; supports optional duty cycle stabilizer. |
| D0–D15 | CMOS digital outputs | 16-bit parallel output with programmable swing (0.5V–3.6V via OVDD); timing referenced to CLK or CLKOUT. |
| SHDN | Power shutdown control | Active-high input; places analog circuitry in low-power state and drives outputs to high-impedance. |
| PGA | Programmable gain amplifier select | Configures input range: PGA = 0 → 2.5VP-P; PGA = 1 → 1.667VP-P - optimizes dynamic range for signal level. |
| OF | Out-of-range indicator | Active-high flag signaling input exceeds full-scale range - enables real-time clipping detection in receiver chains. |
| VCM | Common-mode bias output | 1.25V reference for differential input stage; requires ≥2.2μF bypass capacitor to GND for stability. |
| SENSE | Reference mode select | Tied to VDD selects internal 2.5V bandgap reference; external 1.25V/2.5V reference also supported. |
Key Features
| Feature | Design Value |
|---|---|
| PGA front end | Switches input full-scale range between 1.667VP-P and 2.5VP-P to maximize SNR for varying signal amplitudes. |
| Internal dither | Reduces harmonic distortion and improves SFDR at low input levels - enabled via DITH pin. |
| Data output randomizer | Minimizes deterministic spectral content in output bus transitions - reduces EMI and clock feedthrough. |
| Separate OVDD supply | Allows independent CMOS output voltage setting (0.5V–3.6V) to interface directly with 1.8V, 2.5V, or 3.3V logic. |
| Out-of-range indicator (OF) | Real-time overrange detection without requiring post-processing - simplifies AGC loop implementation in receivers. |
| Optional clock duty cycle stabilizer | Enables high-performance operation across wide input clock duty cycles (5%–95%), relaxing clock source requirements. |
Applications
| Cellular Base Station Receiver | Spectrum Analyzer Front End |
|---|---|
|
Use Scenario: Digitizing 70MHz IF signals from multi-carrier GSM/UMTS/LTE downconverters with high adjacent-channel rejection requirements. IC Role / Device Role / Timing Role: High-speed ADC capturing wide instantaneous bandwidth; provides 25Msps sampling synchronized to system clock with sub-ns aperture jitter. Use Value: 100dB SFDR at 1MHz and 85dB at 70MHz enables detection of –100dBc interferers near strong carriers - essential for ACLR compliance testing. |
Use Scenario: Real-time acquisition of RF spectra up to 380MHz bandwidth in portable and benchtop analyzers. IC Role / Device Role / Timing Role: Primary digitizer in FFT-based signal analysis chain; leverages 380MHz full-power bandwidth for direct IF sampling. Use Value: 81.6dB SNR and ±4LSB INL ensure accurate amplitude and frequency domain representation - critical for ENOB > 13.2 bits in measurement-grade instruments. |
| ATE Test Equipment | Imaging System Digitizer |
|
Use Scenario: High-precision stimulus-response testing of RF components (filters, amplifiers) requiring calibrated amplitude linearity and low distortion. IC Role / Device Role / Timing Role: Reference-grade ADC in closed-loop calibration path; uses internal 2.5V reference and OF flag for fault detection. Use Value: ±1LSB DNL (no missing codes) and ±4LSB INL guarantee monotonicity and absolute accuracy - meets MIL-STD-461 and IEEE 1057 traceability requirements. |
Use Scenario: Capturing high-fidelity ultrasound or radar echo waveforms with microsecond-level timing resolution and wide dynamic range. IC Role / Device Role / Timing Role: Time-domain waveform digitizer interfacing to transducer front end; uses PGA to adapt to variable echo amplitudes. Use Value: 25Msps sampling with 380MHz bandwidth resolves sub-ns pulse edges; 220mW power enables integration into portable medical or industrial imaging modules. |
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-105 | 16-bit, 105Msps; higher speed but 2× power (450mW); requires dual supply (1.8V + 3.3V). | Better suited for wideband communications where >25Msps is required; less optimal for power-constrained spectrum analyzers. | Select when system demands >25Msps sampling and can accommodate higher power and complex supply sequencing. |
| LTC2208IUK#PBF | 16-bit, 80Msps; same family architecture; improved SFDR (102dB at 1MHz) but higher power (380mW) and wider temperature range (–40°C to 85°C). | Targeted at industrial/military applications needing extended temp operation and marginally better spurious performance. | Choose for harsh environments or when 80Msps capability justifies increased thermal and layout complexity. |
Compared with AD9268BCPZ-105 and LTC2208IUK#PBF, the LTC2203CUK#PBF offers the optimal balance of 25Msps performance, 220mW power efficiency, and 0°C to 70°C commercial temperature grade - making it ideal for cost-sensitive, thermally constrained RF test and communications infrastructure designs.
Availability
LTC2203CUK#PBF is available at Aetrix Electronics and suitable for cellular base station receivers, spectrum analyzers, automated test equipment, and imaging system digitizers requiring stable component supply and long-term production continuity.
Supply support for LTC2203CUK#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 LTC2203CUK#PBF belongs to ADI's high-speed precision ADC product line, designed specifically for demanding RF and instrumentation applications requiring wide bandwidth, high SNR, and excellent linearity in compact QFN packages.
FAQ
What is the maximum analog input frequency supported by the LTC2203CUK#PBF?
The LTC2203CUK#PBF supports a full-power bandwidth of 380MHz, meaning it can accurately digitize analog input signals with frequencies up to 380MHz without significant amplitude roll-off. This specification is measured with Rs < 20Ω source impedance and applies across the device's operating temperature range (0°C to 70°C for the C-grade LTC2203CUK#PBF).
Does the LTC2203CUK#PBF require an external reference voltage?
No, the LTC2203CUK#PBF includes an internal 2.5V bandgap reference. The SENSE pin is tied to VDD (via ≤1kΩ resistor) to enable this internal reference, which sets a full-scale ADC range of 2.5V when PGA = 0. An external 1.25V or 2.5V reference may also be used if higher precision or custom scaling is needed - the LTC2203CUK#PBF supports both configurations.
How does the PGA feature affect the input range and performance of the LTC2203CUK#PBF?
The PGA in the LTC2203CUK#PBF configures the full-scale differential input range: PGA = 0 yields 2.5VP-P, while PGA = 1 yields 1.667VP-P. This adjustment optimizes dynamic range for varying signal amplitudes - using PGA = 1 improves SNR for smaller signals by reducing quantization noise relative to input, while maintaining the same 380MHz bandwidth and 81.6dB SNR baseline at 1MHz.
What is the purpose of the OF (out-of-range) pin on the LTC2203CUK#PBF?
The OF pin on the LTC2203CUK#PBF is an active-high indicator that asserts when the analog input exceeds the selected full-scale range (±1.25V for 2.5VP-P mode or ±0.833V for 1.667VP-P mode). It provides real-time overrange detection without requiring software analysis of output codes, enabling fast AGC response or fault logging in receiver and test equipment applications using the LTC2203CUK#PBF.
Can the LTC2203CUK#PBF operate with a 2.5V digital output supply (OVDD)?
Yes, the LTC2203CUK#PBF supports OVDD from 0.5V to 3.6V, including 2.5V. At OVDD = 2.5V, the high-level output voltage (VOH) is guaranteed ≥2.49V with 200μA sink current, and low-level output voltage (VOL) is ≤0.1V with 1.6mA source current - ensuring reliable interfacing with standard 2.5V CMOS logic families without level-shifting circuitry.
LTC2203CUK#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:
- 0°C ~ 70°C
- Supplier Device Package:
- 48-QFN (7x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2203CUK#PBF FAQ
1.How can I place an order for LTC2203CUK#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2203CUK#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 LTC2203CUK#PBF reliable?
The price and inventory of LTC2203CUK#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2203CUK#PBF is usually 5 days.
3.What payment methods are accepted for LTC2203CUK#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2203CUK#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2203CUK#PBF?
LTC2203CUK#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2203CUK#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 LTC2203CUK#PBF?
For technical support, including LTC2203CUK#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2203CUK#PBF requirements.
6.How does Aetrix verify that LTC2203CUK#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2203CUK#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 LTC2203CUK#PBF meets industry standards.
7.What is the process for return or replacement of LTC2203CUK#PBF?
All LTC2203CUK#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2203CUK#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 LTC2203CUK#PBF part is unused and in its original packaging.
Return procedure for LTC2203CUK#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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