Overview
The MAX1438B is an octal, 12-bit analog-to-digital converter (ADC) produced by Analog Devices Inc./Maxim Integrated. This ADC is designed for low-power and high-dynamic performance, making it suitable for applications such as medical imaging instrumentation and digital communications. It operates from a single 1.8V supply, consuming only 913mW (114mW per channel), and delivers a 69.9dB signal-to-noise ratio (SNR) at a 5.3MHz input frequency. The device features a pipelined architecture, digital error correction, and fully differential inputs, ensuring high accuracy and reliability.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|---|
| Resolution | N | 12 | 12 | 12 | Bits | |
| Integral Nonlinearity (INL) | ±0.4 | ±2.5 | LSB | |||
| Differential Nonlinearity (DNL) | ±0.25 | ±1 | LSB | |||
| Offset Error | ±0.5 | %FS | ||||
| Gain Error | -3 | ±0.5 | +2 | %FS | ||
| Differential Input Range | VID | 1.4 | V_P-P | |||
| Common-Mode Voltage Range | VCMO | 0.76 | V | |||
| Maximum Conversion Rate | fSMAX | 64 | MHz | |||
| Minimum Conversion Rate | fSMIN | 4.0 | MHz | |||
| Power Consumption (per channel) | 114 | mW | ||||
| Signal-to-Noise Ratio (SNR) | 69.9 | dB | ||||
| Spurious-Free Dynamic Range (SFDR) | 94 | dBc | ||||
| Operating Temperature Range | -40 | +85 | °C | |||
| Package Type | 68-Pin Thin QFN with Exposed Pad |
Key Features
- Excellent Dynamic Performance: 69.9dB SNR at 5.3MHz and 94dBc SFDR at 5.3MHz.
- Ultra-Low Power: 114mW per channel in normal operation.
- Serial LVDS Outputs: Supports up to 30 inches FR-4 backplane connections.
- Pin-Selectable LVDS/SLVS Mode: Flexible output mode selection.
- Test Mode for Digital Signal Integrity: Ensures reliable digital signal transmission.
- Fully Differential Analog Inputs: Wide differential input voltage range of 1.4V_P-P.
- On-Chip 1.24V Precision Bandgap Reference: Sets the full-scale range of the ADC.
- Clock Duty-Cycle Equalizer: Compensates for wide variations in clock duty cycle.
- Compact Package: 68-Pin Thin QFN package with exposed pad.
- Evaluation Kit Available: Order MAX1437BEVKIT for evaluation purposes.
Applications
- Ultrasound and Medical Imaging Instrumentation: Optimized for high-dynamic performance in medical imaging.
- Multichannel Communications: Suitable for digital communications applications.
- Instrumentation: General instrumentation requiring high accuracy and low power consumption.
Q & A
- What is the resolution of the MAX1438B ADC?
The MAX1438B has a resolution of 12 bits.
- What is the maximum conversion rate of the MAX1438B?
The maximum conversion rate is 64Msps.
- How much power does the MAX1438B consume per channel?
The MAX1438B consumes 114mW per channel in normal operation.
- What is the signal-to-noise ratio (SNR) of the MAX1438B at 5.3MHz input frequency?
The SNR is 69.9dB at a 5.3MHz input frequency.
- Does the MAX1438B support external reference voltage?
Yes, the MAX1438B allows the use of an external reference for increased accuracy or different input voltage range.
- What type of output does the MAX1438B provide?
The MAX1438B provides serial LVDS outputs.
- What is the operating temperature range of the MAX1438B?
The operating temperature range is -40°C to +85°C.
- What package type is the MAX1438B available in?
The MAX1438B is available in a 68-Pin Thin QFN package with an exposed pad.
- Is an evaluation kit available for the MAX1438B?
Yes, an evaluation kit (MAX1437BEVKIT) is available for the MAX1438B.
- What are the common applications of the MAX1438B?
The MAX1438B is commonly used in ultrasound and medical imaging instrumentation, multichannel communications, and general instrumentation.
