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Analog Devices Inc. LTC2205IUK#PBF
- Part No.:
- LTC2205IUK#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
LTC2205IUK#PBF.pdf
- Description:
- IC ADC 16BIT PIPELINED 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,825
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Product details
Overview
LTC2205IUK#PBF from Analog Devices (formerly Linear Technology) is a 16-bit, 65Msps high-speed analog-to-digital converter optimized for undersampling RF and IF signals up to 700MHz full-power bandwidth. It features 79dB SNR, 100dB SFDR at 5MHz input (2.25VP-P range), ultralow 90fsRMS aperture jitter, ±4LSB INL, and a programmable gain amplifier (PGA) front end. It is deployed in cellular base station receivers and spectrum analyzers requiring wide dynamic range digitization.
For engineers reviewing the LTC2205IUK#PBF datasheet, LTC2205IUK#PBF pinout, LTC2205IUK#PBF application, or LTC2205IUK#PBF equivalent, key selection criteria include its 65Msps sampling rate, 700MHz input bandwidth, differential LVDS/PECL clock interface, CMOS output swing (0.5V–3.6V), and –40°C to +85°C industrial temperature grade.
Technical Context
The LTC2205IUK#PBF employs a 16-bit pipelined ADC core with integrated sample-and-hold and correction logic, supporting both undersampling and baseband acquisition. Its PGA front end enables two selectable input ranges (1.5VP-P or 2.25VP-P) while maintaining DC accuracy of ±4LSB INL and ±1LSB DNL.
It accepts differential or single-ended encode clocks via ENC+/ENC– inputs, with an optional internal duty cycle stabilizer enabling full-speed operation across wide clock duty cycles. Output data is delivered in parallel CMOS format with pipeline latency of 7 cycles and configurable output power supply (OVDD = 0.5V–3.6V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes - guarantees monotonicity and full code coverage for precision measurement systems. |
| Sampling Rate | 65Msps - supports real-time digitization of wideband signals including LTE, WiMAX, and radar IF bands. |
| SNR / SFDR | 79dB SNR and 100dB SFDR at 5MHz input - enables high-fidelity signal capture with minimal noise and spurious content. |
| Aperture Jitter | 90fsRMS - critical for preserving SNR when undersampling multi-hundred-MHz RF inputs. |
| Input Bandwidth | 700MHz full-power - allows direct digitization of first-IF signals without external filtering or downconversion. |
| Supply & Power | Single 3.3V analog supply; 610mW typical dissipation - simplifies power design while maintaining thermal stability in dense RF layouts. |
| Operating Temp | –40°C to +85°C - qualified for industrial and outdoor wireless infrastructure environments. |
Pinout & Package
Package: 48-lead (7mm × 7mm) plastic QFN with exposed pad (Pin 49 = GND). RoHS-compliant lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN+, AIN– | Differential analog input | Accepts 1.5VP-P or 2.25VP-P input range; common-mode voltage fixed at 1.25V internally. |
| ENC+, ENC– | Differential encode clock input | Supports sine wave, PECL, LVDS, TTL, or CMOS; optional duty cycle stabilizer improves timing margin. |
| D0–D15 | Parallel CMOS data outputs | 16-bit 2's complement output; swing set by OVDD (0.5V–3.6V) for interfacing with diverse logic families. |
| CLKOUT+, CLKOUT– | Differential output clock | Provides synchronized clock for downstream logic; delay matched to data (tSKEW = ±0.6ns). |
| PGA, DITH, RAND, OE, SHDN, OF | Control inputs/outputs | Enable programmable gain (PGA), internal dither (DITH), output randomization (RAND), output enable (OE), shutdown (SHDN), and out-of-range flag (OF). |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Gain Amplifier (PGA) | Selects between 1.5VP-P and 2.25VP-P input ranges to optimize SNR for varying signal amplitudes without external amplification. |
| Ultralow Aperture Jitter | 90fsRMS enables >79dB SNR at 140MHz input frequency - essential for high-order modulation schemes like 256-QAM. |
| Optional Internal Dither | Reduces harmonic distortion and improves SFDR by >10dB at low input levels (e.g., –25dBFS), enhancing dynamic range consistency. |
| Separate Output Supply (OVDD) | Allows CMOS output swing from 0.5V to 3.6V - supports direct interface to 1.8V, 2.5V, or 3.3V FPGA/ASIC I/O banks. |
| Out-of-Range Indicator (OF) | Real-time flag asserts when input exceeds full-scale - enables automatic gain control (AGC) loop response within one sample period. |
Applications
| Cellular Base Station Receiver | Spectrum Analyzer Front End |
|---|---|
Use Scenario: Digitizing 70–250MHz IF signals from multi-carrier GSM/UMTS/LTE radio chains. IC Role / Device Role / Timing Role: High-speed ADC capturing wide instantaneous bandwidth with minimal spurious content for digital predistortion and channel estimation. Use Value: 100dB SFDR ensures clean separation of adjacent carriers; 700MHz bandwidth eliminates need for additional IF filtering stages. | Use Scenario: Real-time spectral analysis of RF signals up to 140MHz with <1kHz resolution bandwidth. IC Role / Device Role / Timing Role: Primary digitizer feeding FFT engine; low jitter preserves frequency bin integrity during long transforms. Use Value: 90fsRMS jitter limits phase noise floor degradation; 79dB SNR enables detection of signals 79dB below full scale. |
| ATE Test Instrumentation | Imaging System Digitizer |
Use Scenario: High-accuracy waveform capture in automated test equipment for RF component validation. IC Role / Device Role / Timing Role: Precision ADC providing traceable amplitude and phase measurements under IEEE 1687 compliance requirements. Use Value: ±4LSB INL and ±1LSB DNL ensure measurement linearity across full dynamic range; –40°C to +85°C rating supports factory-floor environmental variation. | Use Scenario: Digitizing analog video outputs from scientific CCD/CMOS sensors with wide dynamic range and low noise. IC Role / Device Role / Timing Role: High-fidelity ADC converting linear sensor output into 16-bit digital image data with minimal quantization artifacts. Use Value: Optional internal dither suppresses pattern noise in low-light imaging; PGA optimizes full-scale utilization for varying scene brightness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2206IUK#PBF | 80Msps sampling rate; identical 16-bit resolution, PGA, and QFN-48 package; higher power (776mW). | Better suited for wider instantaneous bandwidth needs (e.g., 5G NR FR1 channel rastering). | Select when system requires >65Msps while retaining same feature set and layout compatibility. |
| AD9268BCPZ-65 | 16-bit, 65Msps; JESD204B serial output instead of parallel CMOS; lower power (480mW); different pinout and supply scheme. | Preferred for space-constrained designs where FPGA JESD204B receiver is available and PCB routing density is critical. | Choose for serial interface integration and reduced board area; requires JESD204B PHY support and layout redesign. |
Compared with LTC2206IUK#PBF and AD9268BCPZ-65, the LTC2205IUK#PBF offers optimal balance of 65Msps performance, parallel CMOS simplicity, industrial temperature range, and proven RF undersampling capability - making it ideal for cost-sensitive, high-reliability infrastructure applications where layout reuse and deterministic timing are prioritized.
Availability
LTC2205IUK#PBF is available at Aetrix Electronics and suitable for cellular base stations, spectrum analyzers, and automated test equipment requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for LTC2205IUK#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 communications, industrial, automotive, and healthcare markets.
The LTC2205IUK#PBF belongs to ADI's high-speed precision ADC product line, engineered specifically for demanding RF/IF digitization in wireless infrastructure, instrumentation, and defense electronics where wide bandwidth, low jitter, and DC accuracy are simultaneously required.
FAQ
What is the maximum analog input frequency supported by the LTC2205IUK#PBF?
The LTC2205IUK#PBF supports a full-power analog input bandwidth of 700MHz, enabling direct undersampling of RF and IF signals without external bandpass filtering. This specification is verified per the datasheet's BW-3dB parameter and confirmed in typical performance plots (e.g., Figure G38, G39) showing maintained SFDR and SNR up to 140MHz input with 65Msps sampling.
Does the LTC2205IUK#PBF require external reference voltage?
No, the LTC2205IUK#PBF integrates an internal reference generator and does not require an external reference. The device operates with a single 3.3V analog supply (VDD) and provides a stable 1.25V common-mode bias (VCM) for the analog input stage. External reference mode is not supported per the datasheet's "INTERNAL ADC REFERENCE GENERATOR" block diagram and absence of VREF pins.
Can the LTC2205IUK#PBF operate with a 1.8V OVDD supply for interfacing with low-voltage FPGAs?
Yes, the LTC2205IUK#PBF supports OVDD from 0.5V to 3.6V, including 1.8V. At OVDD = 1.8V, the datasheet specifies VOH = 1.79V (IO = –200μA) and VOL = 0.1V (IO = 1.60mA), ensuring compatible logic thresholds for 1.8V FPGA I/O banks. This is explicitly validated in the "DIGITAL INPUTS AND DIGITAL OUTPUTS" section under OVDD = 1.8V conditions.
What is the function of the MODE pin on the LTC2205IUK#PBF?
The MODE pin on the LTC2205IUK#PBF selects between two input voltage ranges: MODE = low configures 2.25VP-P, and MODE = high configures 1.5VP-P. This setting directly controls the PGA gain and is independent of the PGA pin. The MODE pin's pull-down current is specified as 10μA, allowing simple resistor-based level setting or direct GPIO control.
Is the LTC2205IUK#PBF pin-compatible with other devices in the LTC220x family?
Yes, the LTC2205IUK#PBF is pin-compatible with the LTC2204, LTC2206, and LTC2207 families in the same 48-lead QFN package. The datasheet explicitly states "Pin Compatible Family" and confirms identical pinouts across these variants (e.g., AIN+, ENC+, D0–D15, CLKOUT+, etc.), enabling drop-in upgrades or downgrades based on sample rate requirements without PCB revision.
LTC2205IUK#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):
- 65M
- 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:
- -
LTC2205IUK#PBF FAQ
1.How can I place an order for LTC2205IUK#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2205IUK#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 LTC2205IUK#PBF reliable?
The price and inventory of LTC2205IUK#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2205IUK#PBF is usually 5 days.
3.What payment methods are accepted for LTC2205IUK#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2205IUK#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2205IUK#PBF?
LTC2205IUK#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2205IUK#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 LTC2205IUK#PBF?
For technical support, including LTC2205IUK#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2205IUK#PBF requirements.
6.How does Aetrix verify that LTC2205IUK#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2205IUK#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 LTC2205IUK#PBF meets industry standards.
7.What is the process for return or replacement of LTC2205IUK#PBF?
All LTC2205IUK#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2205IUK#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 LTC2205IUK#PBF part is unused and in its original packaging.
Return procedure for LTC2205IUK#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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