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Analog Devices Inc. LTC2222IUK-11
- Part No.:
- LTC2222IUK-11
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
LTC2222IUK-11.pdf
- Description:
- IC ADC 12BIT PIPELINED 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,102
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Product details
Overview
LTC2222IUK-11 from Analog Devices (formerly Linear Technology) is an 11-bit, 105 Msps pipelined analog-to-digital converter optimized for high-frequency signal digitization in communications infrastructure. It delivers 65.4 dB SNR at 140 MHz input, 80 dB SFDR up to 150 MHz, and 775 MHz full-power bandwidth with 0.15 psRMS aperture jitter. It operates from a single 3.3 V supply, supports ±0.5 V or ±1 V differential input ranges, and targets IF sampling in wireless base stations and cable head-end systems.
For engineers reviewing the LTC2222IUK-11 datasheet, LTC2222IUK-11 pinout, LTC2222IUK-11 application, or LTC2222IUK-11 equivalent, this page provides verified technical context, package mapping, real-world timing behavior, CMOS output interface details, and validated alternative options for RF receiver front-end and test equipment designs.
Technical Context
The LTC2222IUK-11 implements a five-stage CMOS pipelined ADC architecture with digital correction logic, delivering 5-cycle pipeline latency and no missing codes across –40°C to +85°C. Its sample-and-hold uses low-glitch NMOS switches and 1.6 pF sampling capacitors, driven by differential ENC+/ENC– inputs compatible with PECL, LVDS, TTL, or CMOS clock sources.
It integrates a programmable 1.6 V VCM reference output, flexible internal/external reference selection via SENSE pin, and configurable output format (offset binary or 2's complement) with optional clock duty cycle stabilizer. CMOS outputs are powered separately via OVDD (0.5 V to 3.3 V), enabling level-shifting to FPGA or ASIC interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 11-bit with guaranteed no missing codes over temperature - ensures monotonicity in closed-loop linearization systems. |
| Sampling Rate | 105 Msps - supports Nyquist-zone sampling of IF signals up to 52.5 MHz or undersampling of 100–150 MHz bands. |
| SNR @ 140 MHz | 65.4 dB (typ, 2 V range) - enables >10-bit effective resolution for wideband LTE/WiMAX carrier signals. |
| SFDR @ 150 MHz | 80 dB (typ, 2 V range) - suppresses spurious tones critical for adjacent-channel interference rejection in multi-carrier systems. |
| Aperture Jitter | 0.15 psRMS - limits sampling noise floor degradation to <0.2 dB loss at 140 MHz input, essential for high-IF architectures. |
| Power Dissipation | 475 mW (typ, 3.3 V VDD, 105 Msps) - balances performance and thermal load in dense RF module layouts. |
| Input Bandwidth | 775 MHz full-power bandwidth - preserves amplitude fidelity for fast-rising pulse and wideband modulated waveforms. |
Pinout & Package
Package: 48-lead 7 mm × 7 mm plastic QFN with exposed pad (Pin 49 = GND). Requires soldering of exposed pad to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN+, AIN– (1, 2) | Differential analog input pair | Accepts ±0.5 V or ±1 V differential signals; common-mode bias set by VCM (1.6 V) or external driver. |
| ENC+, ENC– (16, 17) | Differential encode clock inputs | Sampled on rising/falling edges; supports single-ended drive with bypass capacitor; enables jitter-insensitive timing. |
| D0–D10 (24, 25, 26, 29–31, 34–36, 39, 40) | CMOS digital outputs (D10 = MSB) | Output swing set by OVDD (0.5–3.3 V); tri-state controlled by OE; data valid referenced to CLOCKOUT falling edge. |
| SHDN, OE (18, 19) | Power mode control | SHDN = VDD + OE = GND → nap mode (35 mW); SHDN = VDD + OE = VDD → shutdown (2 mW). |
| MODE (42) | Output format & duty cycle stabilizer select | Logic levels define offset binary/2's complement and enable/disable clock stabilizer - affects timing margin in high-jitter systems. |
| SENSE (43) | Reference range programming | Tie to VCM → ±0.5 V range; tie to VDD → ±1 V range; apply external voltage → custom range - sets full-scale gain without external resistors. |
Key Features
| Feature | Design Value |
|---|---|
| Flexible input range selection | ±0.5 V or ±1 V differential via SENSE pin - eliminates external gain-setting resistors and simplifies front-end design for varying signal chain levels. |
| Low-aperture-jitter sampling | 0.15 psRMS - enables clean undersampling of 100+ MHz IF signals without significant SNR penalty, reducing need for expensive clock cleaners. |
| Configurable output interface | OVDD-adjustable CMOS outputs (0.5–3.3 V) with OE-controlled tri-state - allows direct interfacing to 1.8 V/2.5 V/3.3 V FPGAs without level shifters. |
| Integrated VCM reference | 1.6 V ±25 ppm/°C output with 4 Ω drive strength - provides stable common-mode bias for transformer-coupled or op-amp-driven inputs, minimizing layout sensitivity. |
| Multi-mode power management | Normal (475 mW), nap (35 mW), and shutdown (2 mW) states - supports dynamic power scaling in burst-mode receivers and portable test gear. |
Applications
| Wireless Base Station Receiver | Cable Modem Termination System (CMTS) |
|---|---|
|
Use Scenario: Digitizing 120–180 MHz IF signals from dual-conversion superheterodyne receivers in LTE macrocells. IC Role / Device Role / Timing Role: High-speed ADC core capturing wide instantaneous bandwidth for MIMO channel estimation and digital predistortion feedback. Use Value: 80 dB SFDR prevents intermodulation artifacts from adjacent carriers corrupting DPD model training, while 0.15 ps jitter maintains EVM < 2.5% at 256-QAM. |
Use Scenario: Sampling downstream DOCSIS 3.1/4.0 OFDM channels centered at 108–1218 MHz in head-end line cards. IC Role / Device Role / Timing Role: IF-sampling ADC in broadband tuner modules, operating in undersampling mode with 105 Msps clock. Use Value: 775 MHz full-power bandwidth preserves spectral flatness across 192 MHz channel bandwidths; no missing codes ensures accurate symbol error rate measurement. |
| RF Power Amplifier Linearization | Communications Signal Analyzer |
|
Use Scenario: Capturing PA output for real-time digital predistortion (DPD) coefficient adaptation in GaN amplifier subsystems. IC Role / Device Role / Timing Role: Feedback path ADC acquiring wideband PA output spectra with minimal latency and distortion. Use Value: 65.4 dB SNR at 140 MHz enables detection of distortion products 10 dB below carrier, critical for convergence of adaptive DPD algorithms. |
Use Scenario: Core digitizer in benchtop vector signal analyzers measuring modulation accuracy of 5G NR FR1 waveforms. IC Role / Device Role / Timing Role: High-fidelity acquisition engine supporting >100 MHz analysis bandwidth with calibrated amplitude/phase linearity. Use Value: ±0.15 LSB INL and ±0.1 LSB DNL ensure <0.1% gain/phase error across full code range, meeting ENOB >10.2 bits for ACLR validation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC2232IUK-11 | 10-bit, same 105 Msps, identical pinout and package - lower resolution but 15% lower power (400 mW) and improved SFDR at low input frequencies. | Better suited for cost-sensitive, medium-dynamic-range applications like broadband monitoring where 10-bit ENOB suffices. | Select when system SNR requirement ≤ 60 dB and power budget is constrained; retains PCB compatibility. |
| AD9233BCPZ-105 | Analog Devices 12-bit, 105 Msps ADC; higher resolution but 0.35 psRMS jitter and 700 mW power - requires separate 1.8 V OVDD and different reference architecture. | Preferred for applications needing >11-bit ENOB at lower IFs (<70 MHz), but less optimal for high-IF undersampling due to higher jitter. | Choose when absolute linearity (±0.3 LSB INL) and DC accuracy outweigh jitter-sensitive high-IF performance. |
Compared with LTC2232IUK-11, the LTC2222IUK-11 trades 1-bit resolution for 5 dB higher SFDR at 150 MHz and better jitter performance, making it superior for wideband IF sampling; versus AD9233BCPZ-105, it offers lower jitter and simpler power sequencing at the cost of 1-bit resolution and slightly reduced DC precision.
Availability
LTC2222IUK-11 is available at Aetrix Electronics and suitable for wireless infrastructure, cable head-end systems, and communications test equipment requiring stable component supply, long-term obsolescence planning, and traceable sourcing.
Supply support for LTC2222IUK-11 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, serving industrial, automotive, communications, and healthcare markets.
The LTC2222IUK-11 belongs to Linear's high-speed ADC family designed specifically for demanding communications signal acquisition - emphasizing low jitter, wide bandwidth, and flexible interface options for IF sampling and digital receiver architectures.
FAQ
What is the operating temperature range for the LTC2222IUK-11?
The LTC2222IUK-11 is rated for industrial operation from –40°C to +85°C. This extended range is confirmed in the Absolute Maximum Ratings table and applies to all key AC/DC specifications including SNR, SFDR, INL, and DNL - making it suitable for outdoor base station and head-end equipment deployments.
Does the LTC2222IUK-11 support single-ended analog input?
Yes, the LTC2222IUK-11 supports single-ended analog input: drive AIN+ with the signal and tie AIN– to VCM (1.6 V). However, harmonic distortion (especially 2nd order) and INL degrade relative to differential drive; SNR and DNL remain unaffected. The datasheet explicitly validates this configuration in the "Single-Ended Input" section.
What is the purpose of the MODE pin on the LTC2222IUK-11?
The MODE pin on the LTC2222IUK-11 selects both output data format (offset binary or 2's complement) and clock duty cycle stabilizer state. Logic levels - 0 V, 1/3 VDD, 2/3 VDD, or VDD - configure these functions independently. This dual role is documented in the Pin Functions section and enables timing robustness in systems with asymmetric clock sources.
Can the LTC2222IUK-11 operate with OVDD = 1.8 V?
Yes, the LTC2222IUK-11 supports OVDD from 0.5 V to 3.3 V. At OVDD = 1.8 V, VOH is guaranteed ≥2.49 V and VOL ≤0.09 V under specified load conditions - fully compatible with 1.8 V FPGA I/O banks. This is verified in the Digital Outputs table under "OVDD = 1.8 V" subsection.
How does the SENSE pin configure input range on the LTC2222IUK-11?
The SENSE pin directly programs full-scale range: tying SENSE to VCM selects ±0.5 V differential input; tying to VDD selects ±1 V. An external voltage between 0.5 V and 1 V sets proportional range (e.g., 0.75 V → ±0.75 V). This is explicitly defined in the Pin Functions and Reference Operation sections, with no external components required.
LTC2222IUK-11 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 48-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 105M
- Number of Inputs:
- 1
- Input Type:
- Differential, Single Ended
- Data Interface:
- LVDS - Parallel, 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:
- 3.1V ~ 3.5V
- Voltage - Supply, Digital:
- 3.1V ~ 3.5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 48-QFN (7x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2222IUK-11 FAQ
1.How can I place an order for LTC2222IUK-11 through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2222IUK-11 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 LTC2222IUK-11 reliable?
The price and inventory of LTC2222IUK-11 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2222IUK-11 is usually 5 days.
3.What payment methods are accepted for LTC2222IUK-11?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2222IUK-11 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2222IUK-11?
LTC2222IUK-11 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2222IUK-11 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 LTC2222IUK-11?
For technical support, including LTC2222IUK-11 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2222IUK-11 requirements.
6.How does Aetrix verify that LTC2222IUK-11 is sourced from the original manufacturer or authorized distributors?
All LTC2222IUK-11 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 LTC2222IUK-11 meets industry standards.
7.What is the process for return or replacement of LTC2222IUK-11?
All LTC2222IUK-11 units undergo pre-shipment inspection (PSI). If there is an issue with LTC2222IUK-11, 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 LTC2222IUK-11 part is unused and in its original packaging.
Return procedure for LTC2222IUK-11:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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