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Analog Devices Inc./Maxim Integrated MAX1421ECM+D
- Part No.:
- MAX1421ECM+D
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-LQFP
- Datasheet:
-
MAX1421ECM+D.pdf
- Description:
- IC ADC 12BIT PIPELINED 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:246
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Product details
Overview
The MAX1421ECM+D from Analog Devices is a 12-bit, 40Msps analog-to-digital converter (ADC) with fully differential input, pipelined architecture, internal 2.048V bandgap reference, and 3.3V single-supply operation. It delivers 66dB SNR at 15MHz input frequency, 400MHz small-signal bandwidth, and consumes 188mW typical power - optimized for medical ultrasound imaging and IF digitization.
For engineers reviewing the MAX1421ECM+D datasheet, MAX1421ECM+D pinout, MAX1421ECM+D application, or MAX1421ECM+D equivalent, this page provides verified technical context, validated pin functions, confirmed dynamic performance metrics (SNR/SFDR/THD), package-locked thermal specifications (–40°C to +85°C), and two rigorously cross-referenced alternative ADCs for high-speed sampling systems.
Technical Context
The MAX1421ECM+D implements a 12-stage pipelined ADC architecture with digital error correction, delivering seven-clock-cycle latency and offset-binary CMOS-compatible parallel outputs. Its fully differential track-and-hold amplifier supports both differential and single-ended inputs, with common-mode level set at AVDD/2 (1.65V) and ±1.024V full-scale differential input range when using the internal reference.
It operates in three reference configurations: internal 2.048V bandgap (REFIN floating), buffered external reference (voltage applied to REFIN), or unbuffered external reference (REFIN = AGND, REFP/REFN/CML driven externally). Power management includes reference shutdown (2mA current reduction) and full shutdown (10µW).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - supports 4096 distinct digital codes for precision signal capture in imaging and communications. |
| Sampling Rate | 40Msps - enables Nyquist-limited baseband digitization up to 20MHz or IF sampling of higher-frequency signals. |
| Signal-to-Noise Ratio | 66dB at fIN = 15MHz - corresponds to ~10.3 effective bits (ENOB), sufficient for medical ultrasound pixel processing. |
| Spurious-Free Dynamic Range | 70dBc at fIN = 15MHz - ensures clean spectral representation critical for radar and CCD applications. |
| Input Bandwidth | 400MHz small-signal –3dB bandwidth - allows faithful acquisition of fast-rising transients without slew-induced distortion. |
| Power Dissipation | 188mW typical at 40Msps - enables thermally constrained designs in portable or densely packed embedded systems. |
| Operating Temperature | –40°C to +85°C - qualified for extended industrial environments including automotive under-hood and industrial data acquisition. |
Pinout & Package
The MAX1421ECM+D is housed in a 48-pin LQFP package (7mm × 7mm, lead-free, C48-2 package code), with separate analog (AGND/AVDD) and digital (DGND/DVDD) supply and ground domains to minimize noise coupling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INP / INN | Differential analog input pair | Accepts ±1.024V differential signal centered at 1.65V; supports single-ended drive with impedance matching and common-mode biasing. |
| CLK / CLK | Differential clock inputs | Sample timing referenced to rising edge of CLK; complementary input accepts differential or single-ended CMOS clocks up to 40MHz. |
| D0–D11 | Parallel digital outputs | Offset-binary, three-state CMOS outputs (D0 = LSB, D11 = MSB); require ≤10pF load for optimal dynamic performance. |
| OE | Output enable control | Logic high places D0–D11 in high-impedance state; essential for bus sharing in multi-ADC systems. |
| PD | Power-down control | Logic high activates full shutdown mode (10µW), reducing system idle power in battery-sensitive applications. |
| REFIN / REFP / REFN / CML | Reference configuration terminals | Support internal reference (REFIN floating), buffered external (REFIN driven), or unbuffered external (REFIN = AGND) modes with precise voltage partitioning. |
Key Features
| Feature | Design Value |
|---|---|
| Single 3.3V supply operation | Eliminates need for dual ±5V or split-rail supplies, simplifying power design and reducing BOM count in portable systems. |
| Internal 2.048V precision bandgap reference | Provides stable full-scale range without external components; temperature coefficient <±100ppm/°C ensures accuracy across –40°C to +85°C. |
| Differential wideband T/H amplifier | 400MHz small-signal bandwidth enables direct digitization of RF/IF signals up to 15MHz without front-end gain stages. |
| Two power-down modes | Reference shutdown reduces supply current by ~2mA; full shutdown draws only 10µW - ideal for duty-cycled sensing systems. |
| Offset-binary parallel outputs | CMOS-compatible D0–D11 interface simplifies connection to FPGAs or DSPs without level-shifting or data format conversion logic. |
Applications
| Medical Ultrasound Imaging | CCD Pixel Processing |
|---|---|
|
Use Scenario: Digitizing echo return signals from phased-array transducers operating at 5–15MHz center frequencies. IC Role / Device Role / Timing Role: High-speed ADC capturing time-domain RF envelopes with low aperture jitter (<2ps) to preserve SNR in beamformed data streams. Use Value: 66dB SNR at 15MHz and 70dBc SFDR ensure accurate tissue contrast resolution and artifact suppression in real-time B-mode imaging. |
Use Scenario: Converting analog pixel charge outputs from high-resolution CCD sensors in scientific cameras and industrial inspection systems. IC Role / Device Role / Timing Role: Low-noise, low-distortion sampling of low-amplitude, high-bandwidth pixel signals with minimal harmonic generation. Use Value: –69dBc THD at 15MHz prevents intermodulation artifacts between adjacent pixel lines, preserving spatial fidelity and grayscale linearity. |
| Radar Signal Digitization | IF and Baseband Digitization |
|
Use Scenario: Sampling intermediate frequency (IF) outputs from X-band or Ku-band radar receivers prior to digital downconversion. IC Role / Device Role / Timing Role: Wideband ADC capturing pulsed IF waveforms with high spurious-free dynamic range to resolve weak targets amid clutter. Use Value: 70dBc SFDR at 15MHz enables detection of low-RCS targets within strong jamming or multipath environments. |
Use Scenario: Digitizing baseband I/Q signals in software-defined radio (SDR) and broadband communication receivers. IC Role / Device Role / Timing Role: Dual-channel-capable ADC supporting complex signal acquisition with matched gain/phase response across differential paths. Use Value: ±0.5LSB DNL and ±2LSB INL over temperature ensure accurate constellation mapping in QAM-64/256 modulation schemes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1420ECM+ | 60Msps sampling rate, identical 12-bit resolution, same 48-pin LQFP package and pinout; higher power (250mW typical). | Better suited for wider IF bandwidths (>25MHz) where higher sampling rate justifies increased power and thermal load. | Select when system requires >40Msps while retaining identical layout, reference scheme, and digital interface. |
| MAX1422ECM+ | 20Msps sampling rate, same 12-bit resolution and 48-pin LQFP package; lower power (110mW typical) and relaxed clock jitter requirements. | Optimized for lower-bandwidth applications like vibration monitoring or slower-scan medical imaging where SNR >67dB at 5MHz suffices. | Select when power budget is tighter and input bandwidth ≤10MHz, enabling longer battery life or simpler thermal design. |
Compared with MAX1421ECM+, the MAX1420ECM+ trades power for speed in wideband IF sampling, while the MAX1422ECM+ prioritizes efficiency and jitter tolerance in cost- and power-sensitive baseband systems - all three share identical reference architecture, pin compatibility, and industrial temperature rating.
Availability
MAX1421ECM+D is available at Aetrix Electronics and suitable for medical ultrasound imaging, radar signal digitization, CCD pixel processing, and IF/baseband digitization requiring stable component supply across extended industrial temperature ranges.
Supply support for MAX1421ECM+D 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, and communications markets since 1965.
The MAX1421ECM+D belongs to Analog Devices' high-speed precision ADC product line, engineered specifically for low-power, wideband digitization in medical imaging, radar, and scientific instrumentation where SNR, SFDR, and thermal stability are critical.
FAQ
What is the maximum clock frequency supported by the MAX1421ECM+D?
The MAX1421ECM+D supports a maximum clock frequency of 40MHz, as specified in its Electrical Characteristics table and confirmed by timing diagrams in the datasheet. Operation beyond 40MHz is not guaranteed and may degrade SNR, SFDR, or cause missing codes. The device achieves optimal dynamic performance (66dB SNR, 70dBc SFDR) precisely at 40MHz with a 50% duty cycle clock input.
Does the MAX1421ECM+D require external decoupling capacitors, and if so, what values are recommended?
Yes, the MAX1421ECM+D requires specific decoupling: each AVDD and DVDD pin must be bypassed to its respective ground (AGND or DGND) with a parallel combination of 0.1µF and 1nF ceramic capacitors placed as close as possible to the pin. Additionally, REFIN, REFP, REFN, and CML require 0.22µF in parallel with 1nF to AGND. These values are mandatory for achieving rated SNR and preventing supply-induced noise coupling.
Can the MAX1421ECM+D operate with a single-ended analog input, and how does that affect performance?
Yes, the MAX1421ECM+D supports single-ended inputs via the INP pin while tying INN to the common-mode voltage (1.65V). However, differential operation yields superior performance: SFDR degrades by ~6dB and THD worsens by ~5dBc compared to fully differential drive. For best results in radar or ultrasound, use transformer or op-amp-based differential conversion.
What is the function of the CML pin on the MAX1421ECM+D, and how should it be configured?
The CML (Common-Mode Level) pin sets the input common-mode voltage for the differential analog input stage. With the internal reference active, CML is internally biased to AVDD/2 (1.65V) and must be bypassed to AGND with 0.22µF || 1nF. In unbuffered external reference mode (REFIN = AGND), CML becomes a high-impedance input and must be driven externally to establish the required 1.65V common-mode level.
How does the power-down mode of the MAX1421ECM+D reduce system power consumption?
The MAX1421ECM+D offers two distinct power-saving states: reference power-down (PD low, REFIN active) reduces analog supply current by ~2mA, and full shutdown (PD high) cuts total device current to 10µW. Both modes retain register state and allow fast wake-up (<1µs), making them ideal for burst-mode acquisition in battery-powered test equipment or portable medical devices.
MAX1421ECM+D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 48-LQFP
- Packaging:
- Tray
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 40M
- 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:
- 3.135V ~ 3.465V
- Voltage - Supply, Digital:
- 2.7V ~ 3.6V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 48-LQFP (7x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1421ECM+D FAQ
1.How can I place an order for MAX1421ECM+D through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1421ECM+D 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 MAX1421ECM+D reliable?
The price and inventory of MAX1421ECM+D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1421ECM+D is usually 5 days.
3.What payment methods are accepted for MAX1421ECM+D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1421ECM+D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1421ECM+D?
MAX1421ECM+D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1421ECM+D 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 MAX1421ECM+D?
For technical support, including MAX1421ECM+D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1421ECM+D requirements.
6.How does Aetrix verify that MAX1421ECM+D is sourced from the original manufacturer or authorized distributors?
All MAX1421ECM+D 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 MAX1421ECM+D meets industry standards.
7.What is the process for return or replacement of MAX1421ECM+D?
All MAX1421ECM+D units undergo pre-shipment inspection (PSI). If there is an issue with MAX1421ECM+D, 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 MAX1421ECM+D part is unused and in its original packaging.
Return procedure for MAX1421ECM+D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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