AD9243ASZRL
Introduction
The AD9243ASZRL is a high-performance, 14-bit high-speed low-power Analog-to-Digital Converter (ADC) manufactured by Analog Devices Inc. (ADI), a flagship device in the AD9243 family of single-channel high-resolution ADCs optimized for high-speed data acquisition and signal processing applications. It delivers selectable sampling rates up to 80 MSPS (Mega Samples Per Second) with exceptional dynamic and static linearity, featuring a single 3.3V power supply, serial LVDS output, and an integrated 2.5V voltage reference—eliminating the need for complex external analog circuitry and simplifying BOM design.
The suffix ASZ indicates a 28-lead narrow-body SSOP (Shrink Small Outline Package, 300mil) with a compact form factor (10.2mm x 6.5mm), ideal for space-constrained high-speed mixed-signal PCB designs. The -RL suffix confirms the part is supplied in Tape & Reel packaging for automated surface-mount assembly (SMA), compliant with RoHS 6/6 lead-free and halogen-free manufacturing standards. This device stands out for its combination of 14-bit high resolution, ultra-fast sampling, low power consumption, and robust dynamic performance, making it a gold standard for high-speed ADCs in portable and compact high-performance systems.
Key Features
14-Bit High Resolution with No Missing Codes: Delivers full 14-bit resolution over the entire operating temperature range with zero missing codes, ensuring precise and linear signal conversion for high-fidelity data acquisition.
Selectable High-Speed Sampling: Supports flexible sampling rates of 40 MSPS, 65 MSPS, and 80 MSPS, adapting to diverse application requirements from medium to high-speed signal processing.
Ultra-Low Power Consumption: Optimized power profile with just 365 mW typical power draw at 80 MSPS (3.3V supply), 290 mW at 65 MSPS, and 180 mW at 40 MSPS—ideal for battery-powered and low-power high-speed systems.
Single 3.3V Power Supply Operation: Eliminates the need for dual power rails, simplifying power management design and reducing PCB space; compatible with 3.3V digital logic for seamless system integration.
Serial LVDS Output Interface: Features low-voltage differential signaling (LVDS) serial output, minimizing electromagnetic interference (EMI) and signal crosstalk, and enabling long-distance data transmission—perfect for high-speed digital systems and noisy industrial environments.
Exceptional Dynamic Performance: Delivers 71.5 dB SNR (Signal-to-Noise Ratio) and 86 dB SFDR (Spurious-Free Dynamic Range) at 80 MSPS (input frequency 10 MHz), ensuring minimal signal distortion for high-frequency analog signal conversion.
Low Static Error: Boasts excellent linearity with ±0.5 LSB max DNL (Differential Nonlinearity) and ±1.0 LSB max INL (Integral Nonlinearity), eliminating the need for external calibration in most high-precision applications.
Flexible Analog Input: Supports both single-ended and differential analog input configurations with a 2V p-p full-scale input range, adapting to diverse signal source types (e.g., amplifiers, sensors, RF front-ends).
Integrated 2.5V Voltage Reference: On-chip precision 2.5V bandgap reference with low temperature drift reduces external component count and design complexity; external reference input option available for custom calibration.
Power-Down Mode: Features a low-power standby mode with minimal quiescent current, enabling power saving in duty-cycled applications (e.g., portable test equipment, intermittent data acquisition).
Industrial Grade Operating Temperature: Operates over a -40°C to +85°C industrial temperature range, ensuring reliable performance in harsh environmental conditions for industrial, automotive, and outdoor applications.
RoHS Compliant: Lead-free and halogen-free packaging, meeting global environmental and regulatory standards for electronic components.
Typical Specification Table
| Parameter |
Specification (80 MSPS, 3.3V, 25°C) |
| Manufacturer |
Analog Devices Inc. (ADI) |
| Product Series |
AD9243 Family (14-Bit High-Speed Low-Power Single-Channel ADCs) |
| Model |
AD9243ASZRL |
| Function |
14-Bit High-Speed Analog-to-Digital Converter (ADC) |
| Resolution |
14 Bits (No Missing Codes, -40°C to +85°C) |
| Max Sampling Rate |
80 MSPS (selectable: 40/65/80 MSPS) |
| Supply Voltage |
3.3V ±5% (Single Supply) |
| Typical Power Consumption |
365 mW (80 MSPS), 290 mW (65 MSPS), 180 mW (40 MSPS) |
| Analog Input Range |
2V p-p (Full-Scale) |
| Analog Input Type |
Single-Ended / Differential (configurable) |
| SNR (10 MHz Input) |
Typ: 71.5 dB (FS) |
| SFDR (10 MHz Input) |
Typ: 86 dBc |
| DNL |
Max: ±0.5 LSB |
| INL |
Max: ±1.0 LSB |
| On-Chip Reference |
2.5V Bandgap Reference (Typ: 2.5V, Low Drift) |
| Output Interface |
Serial LVDS (Low-Voltage Differential Signaling) |
| Operating Temperature |
-40°C to +85°C (Industrial Grade) |
| Package |
28-Lead Narrow-Body SSOP (300mil, 10.2mm x 6.5mm) |
| Special Features |
Power-Down Mode, Internal 2.5V Reference, External Reference Option, No Missing Codes |
| Packaging |
Tape & Reel (RL), Lead-Free/Halogen-Free, RoHS 6/6 Compliant |
Typical Applications
Wireless & Wired Communication Systems: Used in wireless base stations, fiber optic communication transceivers, cable modems, and satellite communication systems for high-speed RF/microwave signal digitization.
Test & Measurement Equipment: Ideal for high-speed oscilloscopes, signal analyzers, arbitrary waveform generators, and portable data acquisition (DAQ) systems requiring high resolution and fast sampling.
Industrial Machine Vision & Imaging: Enables high-speed image capture and processing in machine vision cameras, laser scanners, and industrial inspection systems for real-time defect detection and motion tracking.
Medical Diagnostic Devices: Used in ultrasound imaging systems, digital radiology equipment, and portable medical scanners for high-speed analog signal conversion of biological and medical sensor data.
Radar & RF Front-Ends: Perfect for small radar systems, RF receive front-ends, and electronic warfare (EW) equipment, digitizing high-frequency RF signals with minimal distortion and low EMI.
Aerospace & Avionics: Optimized for portable avionics equipment, satellite data receivers, and unmanned aerial vehicle (UAV) sensing systems, leveraging low power and compact packaging.
Industrial Control & Power Monitoring: Enables high-speed data acquisition for power line monitoring, motor control, and industrial sensor networks, capturing fast transient signals in industrial environments.
Automotive Electronics: Suitable for automotive radar (e.g., adaptive cruise control), in-vehicle infotainment, and automotive test equipment, operating reliably across the automotive temperature range.
Portable High-Speed Instruments: Used in handheld oscilloscopes, portable spectrum analyzers, and field test equipment, combining high performance with low power for extended battery life.
Development & Design Notes
-
Power Supply Decoupling
To minimize noise and ensure stable operation, place a 0.1 µF high-frequency ceramic decoupling capacitor
as close as possible to each VDD (analog and digital) pin of the ADC, with a secondary 10 µF tantalum/ceramic capacitor for low-frequency decoupling. Isolate analog and digital power planes with a ground plane to eliminate digital noise coupling into the analog section—critical for maintaining high SNR and SFDR.
-
Low-Jitter Clock Design
The ADC’s dynamic performance is highly sensitive to clock jitter; use a low-jitter clock source (e.g., ADI’s clock oscillators) and a dedicated clock buffer for the sampling clock input (CLK). Route the clock trace as a short, impedance-matched (50Ω) line, and avoid routing clock traces near analog input and LVDS output traces to reduce crosstalk. Differential clock input is recommended for high-speed operation (80 MSPS) to improve noise immunity.
-
LVDS Output Layout
Route LVDS output differential pairs as
equal-length, impedance-matched (100Ω) traces with minimal length mismatch (<5 mil) to maintain signal integrity. Keep LVDS traces short and close to the target LVDS receiver/connector, and add a ground shield between LVDS pairs and other digital/analog traces to reduce EMI and crosstalk. Avoid vias on LVDS traces where possible; if vias are necessary, use matched vias for each differential pair.
-
Analog Input Driving
For optimal performance, drive the ADC’s analog input with a high-speed, low-distortion operational amplifier (e.g., ADI’s ADA4950 or AD8138) with gain matched to the ADC’s 2V p-p full-scale input range. Impedance-match the analog input trace to 50Ω (single-ended) or 100Ω (differential) to eliminate signal reflection. For high-frequency input signals (>20 MHz), use a differential input configuration to improve common-mode noise rejection.
-
Reference Voltage Design
The on-chip 2.5V reference requires a 0.1 µF decoupling capacitor placed directly at the REF pin for noise reduction; for high-precision applications, an external low-drift 2.5V reference (e.g., AD1580) can be used to replace the internal reference—connect the external reference to the REF pin and leave the internal reference enable pin unconnected.
-
Power-Down Mode Utilization
Activate the power-down mode (PD pin) for duty-cycled applications to reduce power consumption; the ADC wakes up from power-down mode in a few clock cycles, enabling fast resumption of data acquisition. Ensure the PD pin is driven by a clean digital signal to avoid accidental activation/deactivation from noise.
-
Layout for Linear Performance
Minimize trace length for analog input, reference, and power supply pins to reduce parasitic capacitance and resistance. Use a dedicated analog ground plane and connect the ADC’s AGND pin to the analog ground plane with a short, wide trace—avoid sharing ground vias between analog and digital sections. Place high-power components (e.g., regulators, LEDs) away from the ADC to prevent thermal gradients and performance degradation.
-
Lead-Free Soldering
The Tape & Reel (RL) packaging is optimized for reflow soldering; follow ADI’s recommended soldering profile for 28-lead narrow-body SSOP packages (peak temperature: 260°C ±5°C, dwell time: ≤30 seconds) to avoid thermal damage to the on-chip reference and analog circuitry.
