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Analog Devices Inc. LTC2141CUP-14#PBF
- Part No.:
- LTC2141CUP-14#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-WFQFN Exposed Pad
- Datasheet:
-
LTC2141CUP-14#PBF.pdf
- Description:
- IC ADC 14BIT PIPELINED 64QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,498
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Product details
Overview
LTC2141CUP-14#PBF from Analog Devices (formerly Linear Technology) is a 14-bit, 40Msps dual-channel simultaneous-sampling analog-to-digital converter optimized for high-dynamic-range signal digitization in communications infrastructure. It delivers 72.8dB SNR, 90dB SFDR, and ultralow 0.10psRMS jitter at full speed, operating from a single 1.8V supply with CMOS, DDR CMOS, or DDR LVDS outputs - deployed in cellular base stations and software-defined radios.
For engineers reviewing the LTC2141CUP-14#PBF datasheet, LTC2141CUP-14#PBF pinout, LTC2141CUP-14#PBF application, or LTC2141CUP-14#PBF equivalent, key selection criteria include its 40Msps sampling rate, dual-channel timing matching (±0.2% gain, ±1.5mV offset), 750MHz full-power bandwidth, and support for differential or single-ended encode inputs with optional duty cycle stabilization.
Technical Context
The LTC2141CUP-14#PBF implements two independent 14-bit ADC cores sharing a common sample-and-hold with 750MHz bandwidth and 0.10psRMS acquisition jitter in differential encode mode. Its architecture supports simultaneous sampling with guaranteed <±1LSB INL and <±0.3LSB DNL over temperature, enabling coherent multi-channel IF sampling without inter-channel skew.
Digital interface flexibility includes full-rate CMOS, double-data-rate CMOS, or DDR LVDS output modes - with separate OVDD supply (1.1V–1.9V) allowing output swing scaling. Configuration is handled via SPI port (CS/SCK/SDI/SDO) or parallel logic mode using PAR/SER pin selection, supporting shutdown, nap, and clock randomizer features.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with no missing codes - ensures monotonic transfer function across full operating range. |
| Sampling Rate | 40Msps - fixed maximum rate for LTC2141 variant; enables Nyquist-limited digitization up to 20MHz baseband or undersampling of IF signals. |
| SNR | 72.8dB (typ, 70MHz input, –1dBFS) - defines effective noise floor for high-fidelity signal capture in RF receiver chains. |
| SFDR | 90dB (typ, 2nd/3rd harmonic, 70MHz input) - critical for detecting weak signals adjacent to strong interferers in SDR and base station applications. |
| Power Dissipation | 70.4mW (typ, sine input, CMOS mode) - total IC consumption at 40Msps, enabling thermally constrained portable or dense multi-channel systems. |
| Input Bandwidth | 750MHz full-power - supports wideband analog input signals without amplitude roll-off, essential for broadband communications front-ends. |
| Jitter (tJITTER) | 0.10psRMS (differential encode) - directly limits aperture uncertainty, enabling clean undersampling of >100MHz IF signals. |
Pinout & Package
64-pin (9mm × 9mm) plastic QFN package with exposed thermal pad (Pin 65 = GND). Requires soldering exposed pad to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (1,16,17,64) | Analog supply input | 1.7V–1.9V analog power rail; must be bypassed locally with 0.1μF ceramic capacitors per group. |
| AIN1+/AIN1– (4,5) | Channel 1 differential analog input | Accepts 1VP-P to 2VP-P differential signal; common-mode biased by VCM1 (Pin 2). |
| ENC+/ENC– (18,19) | Encode clock inputs | Differential or single-ended (ENC– tied to GND); rising edge on ENC+ initiates conversion. |
| PAR/SER (11) | Programming mode select | Ground = serial SPI mode; VDD = parallel logic mode - determines function of CS/SCK/SDI/SDO pins. |
| D1_0–D1_13 / D2_0–D2_13 (25–32, 45–58, etc.) | Dual-channel digital data outputs | Configurable as CMOS (full/DDR) or DDR LVDS; output voltage swing set by OVDD (Pin 42). |
| OVDD (42) | Digital output supply | 1.1V–1.9V supply for output drivers; sets CMOS swing (1.2V–1.8V) or enables LVDS termination (100Ω internal). |
| SENSE (63) | Reference configuration input | Connect to VDD for ±1V input range/internal reference; connect to GND for ±0.5V range; external reference supported (0.625V–1.3V). |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous sampling dual ADC | Guaranteed channel-to-channel gain matching (±0.2% FS) and offset matching (±1.5mV) enable coherent beamforming and I/Q demodulation. |
| Ultralow jitter acquisition | 0.10psRMS jitter allows clean undersampling of 140MHz IF signals at 40Msps with minimal SNR degradation. |
| Selectable output interface | Hardware-configurable CMOS/DDR CMOS/DDR LVDS reduces FPGA I/O resource usage and EMI in high-density designs. |
| Integrated reference system | On-chip 1.25V VREF (±25ppm/°C drift) and programmable input range (±0.5V/±1V) simplify analog front-end design and reduce BOM count. |
| Low-power operational modes | Nap mode (10mW) and Sleep mode (1mW) support dynamic power scaling in battery-powered or thermally sensitive applications. |
Applications
| Cellular Base Station Receiver | Software-Defined Radio (SDR) |
|---|---|
|
Use Scenario: Digitizing dual-path I/Q signals from RF downconverters in LTE/5G macrocell and small cell base stations. IC Role / Device Role / Timing Role: Simultaneous-sampling dual ADC providing matched gain/phase response for coherent signal processing. Use Value: 90dB SFDR enables detection of low-SNR user signals adjacent to high-power interferers; 72.8dB SNR preserves modulation accuracy for 256-QAM. |
Use Scenario: Wideband IF sampling in reconfigurable radio platforms supporting multiple air interfaces (LTE, Wi-Fi, Bluetooth). IC Role / Device Role / Timing Role: Dual-channel ADC with programmable input range and output interface supporting rapid mode switching. Use Value: 750MHz input bandwidth and 0.10psRMS jitter allow flexible undersampling of 70–140MHz IF bands without external filtering or clock conditioning. |
| Portable Medical Ultrasound | Multi-Channel Data Acquisition |
|
Use Scenario: Beamformed echo signal digitization in handheld ultrasound systems requiring compact, low-power analog front-ends. IC Role / Device Role / Timing Role: Dual ADC capturing synchronized RF echo channels for real-time digital beamforming. Use Value: 40Msps rate matches typical ultrasound center frequencies; 70.4mW total power enables battery operation with minimal thermal dissipation. |
Use Scenario: High-fidelity sensor data capture in industrial test equipment with multiple synchronized analog inputs. IC Role / Device Role / Timing Role: Precision dual ADC delivering matched performance across channels for phase-sensitive measurements. Use Value: ±1LSB INL and ±0.3LSB DNL ensure accurate amplitude and timing correlation between channels in vibration analysis or power quality monitoring. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, 14-bit ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9257BCPZ-40 | 14-bit, 40Msps, single-channel; requires external clock distribution and matching circuitry for dual-channel use. | Lacks native simultaneous sampling; adds layout complexity and timing uncertainty in multi-channel systems. | Choose when only one channel is needed or when external synchronization can be tightly controlled. |
| LTC2140CUP-14#PBF | Same family, 25Msps version; lower power (52.6mW), reduced SFDR (89dB at 70MHz), identical pinout and feature set. | Better suited for cost- and power-sensitive applications where 25Msps bandwidth suffices (e.g., narrowband comms, legacy radar). | Select for lower power and cost where 40Msps sampling is not required; drop-in compatible with same PCB layout. |
Compared with LTC2140CUP-14#PBF, the LTC2141CUP-14#PBF provides +15Msps sampling headroom and +1dB SFDR at 70MHz, while AD9257BCPZ-40 requires external design effort to achieve dual-channel coherence - making LTC2141CUP-14#PBF optimal for integrated, timing-critical dual-path systems.
Availability
LTC2141CUP-14#PBF is available at Aetrix Electronics and suitable for cellular infrastructure, software-defined radio, and portable medical imaging applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for LTC2141CUP-14#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 digital signal processing technologies.
The LTC2141CUP-14#PBF belongs to the LTC214x family of ultra-low-jitter, dual-channel ADCs designed specifically for demanding communications and instrumentation applications requiring simultaneous sampling, wide bandwidth, and low power.
FAQ
What is the maximum sampling rate of the LTC2141CUP-14#PBF?
The LTC2141CUP-14#PBF is rated for a maximum sampling rate of 40Msps - a fixed specification for this variant within the LTC214x family (LTC2142 = 65Msps, LTC2140 = 25Msps). This rate is guaranteed across the full 0°C to 70°C operating temperature range and supports both CMOS and LVDS output modes without derating.
Does the LTC2141CUP-14#PBF support differential analog inputs?
Yes, the LTC2141CUP-14#PBF fully supports differential analog inputs on both channels (AIN1+/AIN1– and AIN2+/AIN2–), with a selectable input range of 1VP-P to 2VP-P. The device includes dedicated VCM1 and VCM2 pins to bias the common-mode voltage to VDD/2, and achieves 80dB common-mode rejection ratio (CMRR) for robust noise immunity.
How does the SENSE pin configure the LTC2141CUP-14#PBF reference?
The SENSE pin on the LTC2141CUP-14#PBF selects the internal reference mode: connecting SENSE to VDD configures a ±1V input range with 1.25V reference; connecting to GND configures a ±0.5V range. An external reference (0.625V–1.3V) may also be applied to SENSE, overriding the internal reference and setting the full-scale range proportionally.
Can the LTC2141CUP-14#PBF operate with a 1.2V OVDD supply?
Yes, the LTC2141CUP-14#PBF supports OVDD from 1.1V to 1.9V in CMOS output modes. At OVDD = 1.2V, the CMOS outputs deliver VOH ≥ 1.185V and VOL ≤ 0.010V under 500μA load - enabling direct interfacing with 1.2V FPGA I/O banks while maintaining noise margin and timing integrity.
What is the purpose of the PAR/SER pin on the LTC2141CUP-14#PBF?
The PAR/SER pin on the LTC2141CUP-14#PBF selects the programming interface mode: grounded for serial SPI control (CS/SCK/SDI/SDO function as standard SPI bus), or tied to VDD for parallel logic mode (CS/SCK/SDI control clock stabilizer, output format, and power modes directly). This pin must be hard-wired - not driven dynamically - to ensure stable configuration.
LTC2141CUP-14#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
- Data Interface:
- LVDS - Parallel, 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:
- 1.7V ~ 1.9V
- Voltage - Supply, Digital:
- 1.7V ~ 1.9V
- Features:
- Simultaneous Sampling
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 64-QFN (9x9)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2141CUP-14#PBF FAQ
1.How can I place an order for LTC2141CUP-14#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2141CUP-14#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 LTC2141CUP-14#PBF reliable?
The price and inventory of LTC2141CUP-14#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2141CUP-14#PBF is usually 5 days.
3.What payment methods are accepted for LTC2141CUP-14#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2141CUP-14#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2141CUP-14#PBF?
LTC2141CUP-14#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2141CUP-14#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 LTC2141CUP-14#PBF?
For technical support, including LTC2141CUP-14#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2141CUP-14#PBF requirements.
6.How does Aetrix verify that LTC2141CUP-14#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2141CUP-14#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 LTC2141CUP-14#PBF meets industry standards.
7.What is the process for return or replacement of LTC2141CUP-14#PBF?
All LTC2141CUP-14#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2141CUP-14#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 LTC2141CUP-14#PBF part is unused and in its original packaging.
Return procedure for LTC2141CUP-14#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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