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Analog Devices Inc. LTC2156IUP-14#TRPBF
- Part No.:
- LTC2156IUP-14#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-WFQFN Exposed Pad
- Datasheet:
-
LTC2156IUP-14#TRPBF.pdf
- Description:
- IC ADC 14BIT PIPELINED 64QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,442
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Product details
Overview
LTC2156IUP-14#TRPBF from Analog Devices (formerly Linear Technology) is a dual-channel, 14-bit, 210Msps analog-to-digital converter optimized for high-frequency undersampling in communications infrastructure. It delivers 70dB SNR, 90dB SFDR, and 1.25GHz full-power bandwidth with DDR LVDS outputs, operating from a single 1.8V supply and supporting sleep/nap modes. It serves as the digitization front-end in cellular basestations and software-defined radios.
For engineers reviewing the LTC2156IUP-14#TRPBF datasheet, LTC2156IUP-14#TRPBF pinout, LTC2156IUP-14#TRPBF application, or LTC2156IUP-14#TRPBF equivalent, key selection criteria include guaranteed ±0.85LSB INL over temperature, 616mW total power at 210Msps, 64-pin QFN package thermal performance, and SPI-configurable clock duty cycle stabilization for jitter-sensitive sampling.
Technical Context
The LTC2156IUP-14#TRPBF employs a pipelined ADC architecture with integrated sample-and-hold and correction logic to achieve low latency (6 clock cycles) and high dynamic accuracy. Its input stage supports differential 1.5VP-P signaling with programmable common-mode bias via VCM output and external reference selection through SENSE pin.
Digital interface uses double-data-rate LVDS outputs with configurable 1.75mA or 3.5mA current per pair and on-chip 100Ω termination. Clocking accepts differential ENC+/ENC– inputs with optional duty-cycle stabilization, enabling robust operation across wide input duty cycle ranges without external conditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with no missing codes over –40°C to +85°C |
| Sampling Rate | 210Msps maximum - defines real-time bandwidth for IF sampling in wireless receivers |
| SNR | 70dBFS at 15MHz input - enables high-fidelity signal capture in baseband and low-IF applications |
| SFDR | 90dBFS (2nd/3rd harmonic) - suppresses spurious content critical for multi-carrier LTE/WCDMA systems |
| Full-Power Bandwidth | 1.25GHz - supports direct RF sampling of L-band and S-band signals without external amplification |
| Total Power | 616mW at 210Msps - balances performance and thermal management in dense RF modules |
| INL / DNL | ±0.85LSB / ±0.25LSB typical - ensures accurate amplitude linearity for digital predistortion and calibration algorithms |
Pinout & Package
64-lead (9mm × 9mm) plastic QFN package with exposed pad (Pin 65 = GND), requiring soldering to PCB ground for thermal and electrical integrity. Pin functions validated per Linear Technology datasheet revision 21576514fb.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AINA+/AINA– AINB+/AINB– | Differential analog inputs (Ch A/B) | Accept 1.5VP-P differential signal; common-mode set by VCM or external bias |
| ENC+/ENC– | Differential encode clock inputs | Trigger conversion on both edges; support sine, LVDS, PECL, CMOS, TTL |
| DA0_1+/- to DA12_13+/- DB0_1+/- to DB12_13+/- | DDR LVDS data outputs (Ch A/B) | Two bits per pair (even/odd multiplexed on CLKOUT+ phase); 100Ω on-chip termination enabled |
| CLKOUT+/CLKOUT– | DDR data output clock | Source-synchronous timing reference; programmable phase delay relative to data |
| SENSE | Reference mode select | Connect to VDD for internal 1.25V ref (±0.75V range); apply 1.2–1.3V for external ref (±0.6×VSENSE range) |
| CS/SCK/SDI/SDO PAR/SER | SPI and parallel configuration interface | Serial mode (PAR/SER = GND): full register control; Parallel mode (PAR/SER = VDD): simplified mode selection |
Key Features
| Feature | Design Value |
|---|---|
| Single 1.8V supply operation | Eliminates multi-rail power design complexity and reduces BOM count in compact RF front-ends |
| 6-cycle pipeline latency | Enables deterministic real-time processing in closed-loop digital feedback systems like adaptive beamforming |
| Optional clock duty cycle stabilizer | Compensates for asymmetric clock waveforms without external circuitry-critical for FPGA-driven sampling clocks |
| Low-power Nap mode (198mW) | Reduces power during burst-mode operation while retaining fast wake-up for intermittent signal acquisition |
| Integrated VCM and VREF buffers | Provides stable, low-impedance bias references directly usable for driving transformer-coupled or active balun inputs |
Applications
| Cellular Basestation Receiver | Software Defined Radio (SDR) |
|---|---|
Use Scenario: Digitizing multiple 20MHz LTE carriers in a macrocell remote radio head with IF at 185MHz. IC Role / Device Role / Timing Role: Dual-channel simultaneous sampling ADC providing time-aligned I/Q data streams for digital downconversion and MIMO processing. Use Value: 90dB SFDR prevents intermodulation distortion between adjacent carriers; 1.25GHz bandwidth enables direct IF sampling without image-reject filtering. | Use Scenario: Wideband spectrum monitoring from 100MHz to 2.5GHz using tunable local oscillator and direct RF sampling. IC Role / Device Role / Timing Role: High-speed digitizer capturing instantaneous bandwidth up to 210MHz for real-time FFT and signal classification. Use Value: 70dB SNR ensures detection of weak signals buried in noise floor; DDR LVDS interface sustains 420MB/s sustained throughput to FPGA fabric. |
| Medical Ultrasound Beamformer | Test & Measurement Instrumentation |
Use Scenario: Receiving echo signals from phased-array transducers with center frequency of 5MHz and bandwidth up to 10MHz. IC Role / Device Role / Timing Role: Low-noise, low-latency ADC channel in multi-channel receive beamformer ASIC subsystem. Use Value: ±0.25LSB DNL preserves pulse shape fidelity for time-of-flight calculations; 6-cycle latency minimizes processing delay in real-time focusing. | Use Scenario: High-resolution oscilloscope front-end capturing transient events at 210Mpts/sec with 14-bit vertical resolution. IC Role / Device Role / Timing Role: Core digitization engine delivering high dynamic range and low harmonic distortion for waveform analysis. Use Value: 70dB SNR and 90dB SFDR meet Class A instrument specifications; 1.5VP-P input range simplifies analog front-end gain staging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, 14-bit, high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9680BCPZ-500 | 250Msps dual 14-bit ADC with JESD204B interface; higher power (1.5W), wider bandwidth (1.5GHz), no internal reference | Requires external serializer and clock management IC; suited for high-channel-count systems with FPGA JESD204B receivers | Select when system-level data transport demands serial lane efficiency over parallel LVDS simplicity |
| LTC2165IUP-14#TRPBF | Single-channel 14-bit 130Msps ADC in same QFN package; lower power (320mW), reduced SFDR (86dB), no duty cycle stabilizer | Used where channel count or sampling rate is halved; lacks dual-sampling synchronization and advanced clock conditioning | Select for cost-optimized, lower-throughput designs where dual-channel simultaneity is not required |
Compared with AD9680BCPZ-500, LTC2156IUP-14#TRPBF offers simpler board-level integration via LVDS and built-in reference, while LTC2165IUP-14#TRPBF trades performance for power and cost in non-simultaneous applications-neither is pin-compatible, but all three serve distinct points in the high-speed ADC design space.
Availability
LTC2156IUP-14#TRPBF is available at Aetrix Electronics and suitable for cellular basestation receiver design, software-defined radio development, and medical ultrasound beamformer implementation requiring stable component supply across extended temperature ranges.
Supply support for LTC2156IUP-14#TRPBF 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 LTC2156IUP-14#TRPBF belongs to the LTC215x family of ultra-low-jitter, dual-channel, high-speed ADCs designed specifically for demanding communications and instrumentation applications requiring wide bandwidth, high SNR, and deterministic latency.
FAQ
What is the operating temperature range for the LTC2156IUP-14#TRPBF?
The LTC2156IUP-14#TRPBF is specified for industrial operation from –40°C to +85°C, as indicated by the "I" grade in the part number. This range is validated across all key AC and DC performance parameters including SNR, SFDR, INL, and power consumption, making it suitable for outdoor basestation and ruggedized test equipment environments.
Does the LTC2156IUP-14#TRPBF support external reference voltage?
Yes, the LTC2156IUP-14#TRPBF supports external reference via the SENSE pin: applying 1.2V to 1.3V to SENSE selects an external reference mode with input range = ±0.6 × VSENSE. When SENSE is tied to VDD, the internal 1.25V reference activates, setting a ±0.75V input range. Both configurations maintain full 14-bit linearity and dynamic performance.
How is the DDR LVDS output current configured on the LTC2156IUP-14#TRPBF?
The DDR LVDS output current on the LTC2156IUP-14#TRPBF is configured via the SDI pin in parallel programming mode (PAR/SER = VDD): SDI = high selects 3.5mA mode; SDI = low selects 1.75mA mode. In serial mode, this setting is controlled through the SPI interface register. Output voltage swing scales accordingly (247–454mV differential) while maintaining LVDS compliance.
What is the latency of the LTC2156IUP-14#TRPBF and how is it measured?
The LTC2156IUP-14#TRPBF has a fixed pipeline latency of six clock cycles, measured from the rising edge of ENC+ to valid data appearing on the DDR LVDS outputs. This latency is deterministic and temperature-stable, enabling precise timing alignment in multi-ADC systems and simplifying FPGA-based data capture logic design for the LTC2156IUP-14#TRPBF.
Can the LTC2156IUP-14#TRPBF operate with a single-ended clock input?
No-the LTC2156IUP-14#TRPBF requires differential clocking on ENC+/ENC– for specified AC performance. While the datasheet notes TTL/CMOS compatibility, those inputs must still be applied differentially (e.g., CMOS driver with complementary outputs). Single-ended clock injection degrades jitter performance and violates the minimum differential input voltage (0.2V) requirement, directly impacting SNR and SFDR of the LTC2156IUP-14#TRPBF.
LTC2156IUP-14#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 64-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 210M
- Number of Inputs:
- 2
- Input Type:
- Differential
- Data Interface:
- LVDS - 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:
- -40°C ~ 85°C
- Supplier Device Package:
- 64-QFN (9x9)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2156IUP-14#TRPBF FAQ
1.How can I place an order for LTC2156IUP-14#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2156IUP-14#TRPBF 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 LTC2156IUP-14#TRPBF reliable?
The price and inventory of LTC2156IUP-14#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2156IUP-14#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2156IUP-14#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2156IUP-14#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2156IUP-14#TRPBF?
LTC2156IUP-14#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2156IUP-14#TRPBF 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 LTC2156IUP-14#TRPBF?
For technical support, including LTC2156IUP-14#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2156IUP-14#TRPBF requirements.
6.How does Aetrix verify that LTC2156IUP-14#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2156IUP-14#TRPBF 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 LTC2156IUP-14#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2156IUP-14#TRPBF?
All LTC2156IUP-14#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2156IUP-14#TRPBF, 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 LTC2156IUP-14#TRPBF part is unused and in its original packaging.
Return procedure for LTC2156IUP-14#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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