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Analog Devices Inc. LTC2153IUJ-14#PBF
- Part No.:
- LTC2153IUJ-14#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
LTC2153IUJ-14#PBF.pdf
- Description:
- IC ADC 14BIT PIPELINED 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,262
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Product details
Overview
LTC2153IUJ-14 from Analog Devices (formerly Linear Technology) is a 14-bit, 310Msps analog-to-digital converter optimized for high-frequency undersampling in communications and instrumentation systems. It delivers 68.8dBFS SNR, 88dB SFDR at 70MHz input, and 1.25GHz full-power bandwidth with single 1.8V supply operation. Its DDR LVDS outputs and optional clock duty cycle stabilizer support demanding cellular basestation and software-defined radio front-ends.
For engineers reviewing the LTC2153IUJ-14 datasheet, LTC2153IUJ-14 pinout, LTC2153IUJ-14 application, or LTC2153IUJ-14 equivalent, key selection criteria include its 310Msps sampling rate, 1.32VP-P differential input range, 6-cycle pipeline latency, SPI-configurable LVDS output current (1.75–4.5mA), and –40°C to +85°C industrial temperature grade.
Technical Context
The LTC2153IUJ-14 employs a 14-bit pipelined ADC architecture with integrated sample-and-hold (S/H) featuring 1.25GHz full-power bandwidth and 0.15psRMS acquisition jitter. Its digital interface uses double-data-rate LVDS outputs across seven differential pairs (D0_1 through D12_13), plus dedicated OF and CLKOUT differential pairs.
Configuration is managed via a 3-wire SPI port (CS/SCK/SDI/SDO) supporting serial programming of mode registers for LVDS current, clock phase shift (0°/45°/90°/135°), data format (offset binary or 2's complement), and digital randomization. The ENC+/ENC– encode inputs accept differential sine wave, PECL, LVDS, TTL, or CMOS signals with optional internal duty cycle stabilization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with no missing codes over temperature - guarantees monotonicity and full code coverage in precision measurement. |
| Sampling Rate | 310Msps maximum - enables direct RF sampling of signals up to 155MHz Nyquist zone without external decimation. |
| SNR @ 70MHz | 68.8dBFS typical - supports >11 effective bits at IF frequencies common in SDR and basestation receivers. |
| SFDR @ 70MHz | 88dBFS typical (2nd/3rd harmonic) - ensures clean spectral purity for multi-carrier LTE/WCDMA signal capture. |
| Input Bandwidth | 1.25GHz full-power - allows undersampling of L-band and S-band RF signals with minimal amplitude roll-off. |
| Power Consumption | 401mW total at 310Msps (1.75mA LVDS mode) - balances performance and thermal management in dense FPGA-ADC interfaces. |
| Pipeline Latency | 6 clock cycles - enables deterministic timing alignment for real-time digital downconversion in FPGA-based receivers. |
Pinout & Package
Package: 40-lead (6mm × 6mm) plastic QFN with exposed pad (Pin 41 = GND, must be soldered).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pins 1, 2) | Analog power supply | 1.74V–1.9V single supply; requires local 0.1µF ceramic bypass per pin for noise-sensitive analog core. |
| AIN+, AIN– (Pins 4, 5) | Differential analog input | Accepts 1.32VP-P swing centered at VCM (0.439×VDD); must be driven differentially with 180° phase relationship. |
| ENC+, ENC– (Pins 11, 12) | Differential encode clock input | Starts conversion on rising/falling edges; supports 30–70% duty cycle when stabilizer enabled; 2pF input capacitance. |
| D0_1+ / D0_1– to D12_13+ / D12_13– (Pins 16/17, 18/19, 22/23, 24/25, 28/29, 31/32, 33/34) | DDR LVDS data outputs | Seven differential pairs carry multiplexed even/odd data bits; programmable 1.75–4.5mA output current; internal 100Ω termination optional. |
| CLKOUT+, CLKOUT– (Pins 26, 27) | Data output clock | LVDS clock synchronized to DDR data; configurable 0°/45°/90°/135° phase shift via SPI register A2 for FPGA setup/hold optimization. |
| OF+, OF– (Pins 14, 15) | Overflow/underflow indicator | Differential LVDS flag indicating input clipping; valid during low phase of CLKOUT+; same 6-cycle latency as data. |
| PAR/SER (Pin 40) | Programming mode select | Ground = serial SPI mode (CS/SCK/SDI/SDO active); VDD = parallel mode (CS/SCK/SDI become logic controls for sleep/DCC enable). |
Key Features
| Feature | Design Value |
|---|---|
| DDR LVDS outputs with programmable current | Seven differential data pairs support 1.75–4.5mA drive strength, enabling impedance-matched routing to FPGAs with adjustable signal integrity. |
| Optional clock duty cycle stabilizer | Allows use of non-50% clocks (30–70%) while maintaining internal 50% duty cycle-critical for PLL-based clock trees with variable dividers. |
| Configurable output clock phase shift | 0°/45°/90°/135° CLKOUT phase adjustment via SPI eliminates need for external delay lines or FPGA I/O calibration in high-speed capture systems. |
| Digital output randomizer | XOR-based bit randomization reduces deterministic spurs coupling into analog sections-improves SFDR by suppressing narrowband digital interference tones. |
| Low-power sleep and nap modes | Sleep mode draws <5mW (clock disabled); nap mode draws 124mW (clocked)-enables rapid power-state transitions in burst-mode receivers. |
Applications
| Cellular Basestation Receiver | Software Defined Radio (SDR) |
|---|---|
Use Scenario: Digitizing multi-carrier WCDMA/LTE signals at IF (70–150MHz) in macrocell remote radio heads. IC Role / Device Role / Timing Role: High-speed ADC capturing wide instantaneous bandwidth with low distortion and deterministic latency for real-time DDC. Use Value: 88dB SFDR prevents adjacent-channel interference; 6-cycle latency enables tight loop control in digital predistortion feedback paths. | Use Scenario: Reconfigurable RF front-end for military/commercial SDR platforms requiring tunable IF sampling from HF to S-band. IC Role / Device Role / Timing Role: Direct RF sampling ADC supporting frequency-agile waveform processing with SPI-reconfigurable data format and LVDS drive strength. Use Value: 1.25GHz input bandwidth enables L-band (1–2GHz) undersampling; programmable clock phase simplifies FPGA interface timing closure across bands. |
| High-Speed Test Equipment | Medical Ultrasound Imaging |
Use Scenario: Real-time spectrum analysis and vector signal analysis in benchtop instruments capturing transient RF events. IC Role / Device Role / Timing Role: Precision digitizer providing high dynamic range and low jitter for time-domain and frequency-domain signal reconstruction. Use Value: 68.8dBFS SNR and 0.15psRMS jitter ensure accurate amplitude and phase fidelity in modulated signal analysis. | Use Scenario: Beamforming receive path in portable ultrasound systems digitizing 5–15MHz echo signals with high SNR. IC Role / Device Role / Timing Role: Low-noise, low-latency ADC interfacing to analog beamformer ASICs with DDR LVDS backplane. Use Value: 401mW power at 310Msps enables compact thermal design; 1.32VP-P input range matches typical transducer amplifier output swing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9643BCPZ-250 | 14-bit, 250Msps; lower max sample rate; JESD204B serial interface instead of DDR LVDS; 65dBFS SNR @ 70MHz. | Better suited for JESD204B-equipped FPGAs; less suitable for legacy LVDS-only designs or >250Msps requirements. | Select AD9643BCPZ-250 when system uses JESD204B protocol and 250Msps suffices; avoid if DDR LVDS interface or 310Msps is mandatory. |
| LTC2165IUP-14#PBF | 14-bit, 130Msps; lower power (225mW); same QFN package but 48-pin; no clock duty cycle stabilizer; 67.8dBFS SNR @ 70MHz. | Targeted at cost- and power-sensitive applications where sample rate headroom is not required. | Select LTC2165IUP-14#PBF for lower-speed, lower-power designs with identical feature set except speed and DCC; verify pin compatibility is not required due to 48-pin vs 40-pin mismatch. |
Compared with AD9643BCPZ-250 and LTC2165IUP-14#PBF, the LTC2153IUJ-14 uniquely combines 310Msps sampling, DDR LVDS interface, clock duty cycle stabilization, and 68.8dBFS SNR in a 40-pin QFN-making it optimal for legacy high-speed LVDS-based SDR and basestation upgrades where timing determinism and interface compatibility are critical.
Availability
LTC2153IUJ-14 is available at Aetrix Electronics and suitable for cellular infrastructure, test equipment, and medical imaging applications requiring stable component supply, long-term industrial temperature support (–40°C to +85°C), and guaranteed lead-free compliance.
Supply support for LTC2153IUJ-14 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 LTC2153IUJ-14 belongs to ADI's high-speed precision ADC product line, designed specifically for RF sampling and undersampling applications in wireless infrastructure, instrumentation, and defense electronics where dynamic range, bandwidth, and deterministic latency are paramount.
FAQ
What is the operating temperature range of the LTC2153IUJ-14?
The LTC2153IUJ-14 is rated for industrial operation from –40°C to +85°C, as confirmed by its "I" grade designation and Absolute Maximum Ratings table. This range is validated across all key AC and DC specifications including SNR, SFDR, INL, and DNL, making it suitable for base station outdoor units and ruggedized test equipment.
Does the LTC2153IUJ-14 support both internal and external voltage references?
Yes, the LTC2153IUJ-14 supports dual reference modes. Connecting SENSE to VDD selects the internal 1.25V reference and sets the input range to ±0.66V. Applying an external 1.23V–1.27V reference to SENSE configures the input range to ±0.528×VSENSE, enabling precise gain scaling for matched front-end amplifiers.
How is the digital output format configured on the LTC2153IUJ-14?
The LTC2153IUJ-14 defaults to offset binary output format. It can be reconfigured to 2's complement via SPI register A4, which is accessible through the 3-wire serial interface (CS/SCK/SDI/SDO). This flexibility allows seamless integration with DSP/FPGA logic expecting either data representation.
What LVDS output current levels are available on the LTC2153IUJ-14?
The LTC2153IUJ-14 supports seven programmable LVDS output current levels: 1.75mA, 2.1mA, 2.5mA, 3.0mA, 3.5mA (default), 4.0mA, and 4.5mA. These are selected by writing to SPI mode control register A3, allowing optimization of signal integrity, power, and termination matching for specific PCB trace lengths and receiver inputs.
Can the LTC2153IUJ-14 operate with non-50% duty cycle clock inputs?
Yes-the LTC2153IUJ-14 includes an optional clock duty cycle stabilizer that accepts encode inputs with 30%–70% duty cycle and generates an internal 50% clock for sampling. This feature is enabled via SPI register A2 or by asserting CS in parallel programming mode, eliminating external clock conditioning circuitry.
LTC2153IUJ-14#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 40-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 310M
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- LVDS - 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:
- 1.74V ~ 1.9V
- Voltage - Supply, Digital:
- 1.74V ~ 1.9V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 40-QFN (6x6)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2153IUJ-14#PBF FAQ
1.How can I place an order for LTC2153IUJ-14#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2153IUJ-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 LTC2153IUJ-14#PBF reliable?
The price and inventory of LTC2153IUJ-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 LTC2153IUJ-14#PBF is usually 5 days.
3.What payment methods are accepted for LTC2153IUJ-14#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2153IUJ-14#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2153IUJ-14#PBF?
LTC2153IUJ-14#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2153IUJ-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 LTC2153IUJ-14#PBF?
For technical support, including LTC2153IUJ-14#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2153IUJ-14#PBF requirements.
6.How does Aetrix verify that LTC2153IUJ-14#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2153IUJ-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 LTC2153IUJ-14#PBF meets industry standards.
7.What is the process for return or replacement of LTC2153IUJ-14#PBF?
All LTC2153IUJ-14#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2153IUJ-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 LTC2153IUJ-14#PBF part is unused and in its original packaging.
Return procedure for LTC2153IUJ-14#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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