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Analog Devices Inc. LTC2246HLX#PBF
- Part No.:
- LTC2246HLX#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-LQFP
- Datasheet:
-
LTC2246HLX#PBF.pdf
- Description:
- IC ADC 14BIT PIPELINED 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,278
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Product details
Overview
LTC2246HLX#PBF from Analog Devices (formerly Linear Technology) is a 14-bit, 25Msps pipelined analog-to-digital converter optimized for high-dynamic-range signal digitization in demanding industrial and automotive imaging systems. It operates from a single 3V supply, delivers 74.5dB SNR and 90dB SFDR at 5MHz input, supports –40°C to 125°C ambient, and features flexible ±0.5V to ±1V differential input range with internal 1.5V VCM bias.
For engineers reviewing the LTC2246HLX#PBF datasheet, LTC2246HLX#PBF pinout, LTC2246HLX#PBF application, or LTC2246HLX#PBF equivalent, key selection criteria include its guaranteed no-missing-codes performance over temperature, low 1LSBRMS transition noise, clock duty cycle stabilizer support, shutdown/nap power modes (2mW / 15mW), and LQFP-48 package compatibility with automotive-grade thermal requirements.
Technical Context
The LTC2246HLX#PBF implements a six-stage CMOS pipelined ADC architecture with digital correction logic, achieving 5-cycle pipeline latency and full-scale bandwidth of 575MHz. Its sample-and-hold uses differential NMOS switch-capacitor topology with 4pF sampling capacitors and linearized charging glitch design to minimize harmonic distortion impact.
It integrates a programmable 1.5V bandgap reference, configurable differential reference buffers (REFH/REFL), and flexible output drivers with independent OVDD (0.5V–3.6V) enabling direct interface to diverse logic families. The MODE pin selects between offset binary/2's complement output formats and enables/disables the internal clock duty cycle stabilizer PLL.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with guaranteed no missing codes over –40°C to 125°C - ensures monotonicity in safety-critical sensor data acquisition. |
| Sample Rate | 25Msps maximum - supports Nyquist-limited baseband capture up to 12.5MHz with sufficient margin for anti-alias filtering. |
| SNR / SFDR | 74.5dB SNR and 90dB SFDR at 5MHz input - enables high-fidelity digitization of narrowband RF or ultrasound signals. |
| INL / DNL | ±1LSB typical INL and ±0.5LSB typical DNL - maintains linearity for precision measurement applications like industrial process control. |
| Power Dissipation | 75mW typical at 25Msps - achieves low thermal load in sealed automotive ECUs or compact medical imaging modules. |
| Input Bandwidth | 575MHz full-power bandwidth - accommodates wideband IF sampling in broadband communications receivers. |
| Operating Temp | –40°C to 125°C - qualified for under-hood automotive, industrial motor drives, and downhole oilfield electronics. |
Pinout & Package
Package: 48-lead (7mm × 7mm) plastic LQFP, exposed pad not specified, RoHS-compliant lead-free finish (PBF).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1,4,9,13,15,18,24,25,29,32,36,37,48) | ADC Power Ground | Multiple dedicated analog ground connections reduce ground bounce and improve dynamic performance. |
| AIN+, AIN– (Pins 2,3) | Differential Analog Input | Accepts ±0.5V to ±1V differential swing; requires matched 100Ω source impedance for optimal SFDR. |
| REFH, REFL (Pins 5,6,7,8) | ADC Reference Inputs | High/low reference terminals requiring local 0.1μF + 2.2μF bypassing to suppress reference noise coupling. |
| VDD (Pins 10,11,12,46,47) | Analog Supply | 2.8V–3.5V single supply; 5 dedicated pins minimize IR drop and improve PSRR. |
| CLK (Pin 14) | Sampling Clock Input | Single-ended CMOS/TTL-compatible; rising edge triggers sampling; supports optional duty cycle stabilizer via MODE pin. |
| SHDN, OE (Pins 16,17) | Power Management Control | SHDN + OE combinations enable normal operation, high-Z outputs, nap mode (15mW), or shutdown (2mW). |
| D0–D13 (Pins 19–23,26–28,33–35,38–40) | Parallel Digital Outputs | 14-bit MSB-first parallel bus; OVDD (Pin 31) sets output voltage level (0.5V–3.6V) for interfacing with FPGA or ASIC logic. |
| MODE (Pin 42) | Output Format & Stabilizer Control | Selects offset binary/2's complement output and enables clock duty cycle stabilizer via resistor-divider voltage levels. |
| SENSE (Pin 43) | Input Range Programming | Configures ±0.5V (tied to VCM) or ±1V (tied to VDD) differential input range; supports external reference programming. |
| VCM (Pins 44,45) | Common Mode Bias Output | 1.5V ±25ppm/°C reference output; must be bypassed with ≥2.2μF capacitor for stable analog input biasing. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive-grade temperature range | Specified and tested from –40°C to 125°C - eliminates derating concerns in engine control or ADAS sensor modules. |
| Flexible reference and input configuration | Internal 1.5V VCM + SENSE-programmable ±0.5V/±1V input range - simplifies front-end design across multiple signal chain variants. |
| Low-power operational modes | 2mW shutdown and 15mW nap mode - enables rapid wake-up in battery-powered portable test equipment or IoT edge nodes. |
| Integrated clock duty cycle stabilizer | PLL-based internal clock generation - allows use of non-50% duty cycle external clocks without SNR/SFDR degradation. |
| Robust analog input protection | Clamped input structure handles >100mA transient current without latchup - improves reliability in noisy industrial environments. |
Applications
| Ultrasound Imaging Systems | Automotive Radar Receivers |
|---|---|
|
Use Scenario: Digitizing 5–15MHz echo return signals from piezoelectric transducers in portable and cart-based ultrasound machines. IC Role / Device Role / Timing Role: High-linearity, low-noise ADC capturing time-of-flight data with precise amplitude resolution for B-mode image reconstruction. Use Value: 74.5dB SNR preserves weak tissue boundary signals; 575MHz input bandwidth supports wideband transducer response without aliasing. |
Use Scenario: Sampling intermediate frequency (IF) outputs from 77GHz FMCW radar mixers in adaptive cruise control and blind-spot detection modules. IC Role / Device Role / Timing Role: Precision digitizer for baseband IF signals prior to FFT-based range-Doppler processing in automotive SoCs. Use Value: 90dB SFDR rejects strong clutter harmonics; –40°C to 125°C rating ensures operation inside vehicle front bumper enclosures. |
| Industrial Process Analyzers | Test & Measurement Equipment |
|
Use Scenario: Capturing spectral signatures from optical or acoustic sensors monitoring chemical composition or mechanical vibration in factory-floor analyzers. IC Role / Device Role / Timing Role: High-accuracy ADC converting sensor outputs for real-time FFT analysis and anomaly detection algorithms. Use Value: ±1LSB INL ensures traceable calibration across temperature; no missing codes prevents data gaps in long-duration spectral logging. |
Use Scenario: Front-end digitization in handheld oscilloscopes, spectrum analyzers, and arbitrary waveform generators requiring portable form factor and low power. IC Role / Device Role / Timing Role: Core sampling engine delivering 25Msps throughput with minimal power draw and thermal footprint. Use Value: 75mW typical power enables battery operation; LQFP-48 package supports compact PCB layouts with standard reflow assembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9246BCPZ-25 | 14-bit, 25Msps, but rated only to 85°C; uses different reference architecture (external ref required); higher 105mW power. | Not suitable for under-hood automotive or extended-temperature industrial deployments where 125°C operation is mandatory. | Select LTC2246HLX#PBF when ambient temperature exceeds 85°C or internal reference simplicity is required. |
| LTC2226HLX#PBF | 12-bit, 25Msps pin-compatible variant; lower 66.5dB SNR and 82dB SFDR; reduced 55mW power consumption. | Appropriate for cost-sensitive applications where 12-bit resolution suffices and SFDR >85dB is not required. | Choose LTC2246HLX#PBF when 14-bit resolution and ≥90dB SFDR are essential for signal fidelity in critical measurement paths. |
Compared with AD9246BCPZ-25 and LTC2226HLX#PBF, the LTC2246HLX#PBF uniquely combines automotive-grade temperature range, integrated reference flexibility, and best-in-class SFDR at 25Msps - making it the preferred choice for thermally constrained, high-fidelity digitization where system-level calibration overhead must be minimized.
Availability
LTC2246HLX#PBF is available at Aetrix Electronics and suitable for automotive radar receivers, industrial process analyzers, and portable ultrasound imaging systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC2246HLX#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 industrial, automotive, communications, and healthcare markets.
The LTC2246H belongs to ADI's high-speed precision ADC product line, designed specifically for applications demanding wide dynamic range, low power, and robust operation in harsh thermal environments - including automotive ADAS, industrial automation, and portable medical diagnostics.
FAQ
What is the maximum operating temperature specification for the LTC2246HLX#PBF?
The LTC2246HLX#PBF is fully specified and tested over an operating temperature range of –40°C to 125°C. This automotive-grade rating is validated per AEC-Q100 stress test conditions and applies to all electrical parameters including SNR, SFDR, INL, and DNL - ensuring reliable performance in under-hood or industrial enclosure environments where ambient temperatures exceed 105°C.
Does the LTC2246HLX#PBF require an external reference voltage?
No, the LTC2246HLX#PBF includes an internal 1.5V bandgap reference and programmable reference buffer circuitry. It supports both ±0.5V and ±1V differential input ranges using only the SENSE pin tied to VCM or VDD, respectively. External references are optional and used only when custom input ranges (e.g., ±0.75V) or enhanced stability beyond ±5ppm/°C is required.
How does the clock duty cycle stabilizer function in the LTC2246HLX#PBF?
The LTC2246HLX#PBF's clock duty cycle stabilizer uses an internal PLL to regenerate a precise 50% duty cycle clock from the external CLK input. When enabled via the MODE pin (1/3VDD or 2/3VDD), it ignores the falling edge of the input clock and synthesizes its own internal falling edge - allowing operation with input duty cycles from 30% to 70% without degrading aperture jitter or SNR performance.
What power savings are achieved in nap mode versus shutdown mode for the LTC2246HLX#PBF?
In nap mode (SHDN = HIGH, OE = LOW, no clock), the LTC2246HLX#PBF consumes 15mW typical, retaining internal bias states for fast wake-up. In shutdown mode (SHDN = HIGH, OE = HIGH, no clock), power drops to 2mW typical - disabling all analog circuitry and requiring full re-initialization on wake-up. Both modes preserve register settings stored in nonvolatile memory.
Is the LTC2246HLX#PBF pin-compatible with other devices in the LTC22xxH family?
Yes, the LTC2246HLX#PBF is pin-compatible with the LTC2226HLX#PBF (12-bit) and LTC2266HLX#PBF (16-bit) within the same LQFP-48 package. This enables resolution scalability on identical PCB layouts - allowing hardware reuse across product tiers while maintaining identical power, timing, and interface constraints.
LTC2246HLX#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 48-LQFP
- Packaging:
- Tray
- Product Status:
- Active
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 25M
- Number of Inputs:
- 1
- Input Type:
- Differential, Single Ended
- 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:
- 2.7V ~ 3.4V
- Voltage - Supply, Digital:
- 2.7V ~ 3.4V
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 48-LQFP (7x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2246HLX#PBF FAQ
1.How can I place an order for LTC2246HLX#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2246HLX#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 LTC2246HLX#PBF reliable?
The price and inventory of LTC2246HLX#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2246HLX#PBF is usually 5 days.
3.What payment methods are accepted for LTC2246HLX#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2246HLX#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2246HLX#PBF?
LTC2246HLX#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2246HLX#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 LTC2246HLX#PBF?
For technical support, including LTC2246HLX#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2246HLX#PBF requirements.
6.How does Aetrix verify that LTC2246HLX#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2246HLX#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 LTC2246HLX#PBF meets industry standards.
7.What is the process for return or replacement of LTC2246HLX#PBF?
All LTC2246HLX#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2246HLX#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 LTC2246HLX#PBF part is unused and in its original packaging.
Return procedure for LTC2246HLX#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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