MAX1425
10-Bit, 20Msps ADC
Low-Power, Low-Distortion 10-Bit ADCs Deliver 61dB SNR
Part Details
- Differential Inputs for High Common-Mode Noise Rejection
- Signal-to-Noise Ratio
- 61dB (at fIN = 2MHz)
- 59.3dB (at fIN = 10MHz)
- Internal +2.5V Reference
- 150MHz Input Bandwidth
- Wide ±2V Input Range
- Low Power Consumption: 172mW
- Separate Digital Supply Input for 3V Logic Compatibility
- Single +5V Supply Operation Possible
The MAX1425 10-bit, monolithic analog-to-digital converter (ADC) is capable of a 20Msps sampling rate. This device features an internal track-and-hold (T/H) amplifier for excellent dynamic performance; at the same time, it minimizes the number of external components. Low input capacitance of only 8pF minimizes input drive requirements. A wide input bandwidth (up to 150MHz) makes this device suitable for digital RF/IF downconverter applications employing undersampling techniques.
The MAX1425 employs a differential pipelined architecture with a wideband T/H amplifier to maximize throughput while limiting power consumption to only 172mW. The MAX1425 generates an internal +2.5V reference that supplies three additional reference voltages (+3.25V, +2.25V, and +1.25V). These reference voltages provide a differential input range of +2V to -2V. The analog inputs are biased internally to correct the DC level, eliminating the need for external biasing on AC-coupled applications.
A separate +3V digital logic supply input allows for separation of digital and analog circuitry. The output data is in two's complement format. The MAX1425 is available in the space-saving 28-pin SSOP package. For a pin-compatible version at a lower data rate, refer to the MAX1426 data sheet. For a higher data rate, refer to the MAX1424 data sheet.
Applications
- CCD Pixel Processing
- IF and Baseband Digitization
- IR Focal Plane Arrays
- Medical Ultrasound Imaging
- Radar
- Set-Top Boxes
Documentation
Data Sheet 1
Design Note 1
Technical Articles 1
This is the most up-to-date revision of the Data Sheet.
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Standard High Speed A/D Converters 5 | ||
| MAX1426 | PRODUCTION | 10-Bit, 10Msps ADC |
| MAX1444 | LAST TIME BUY | 10-Bit, 40Msps, 3.0V, Low-Power ADC with Internal Reference |
| MAX1446 | RECOMMENDED FOR NEW DESIGNS | 10-Bit, 60Msps, 3.0V, Low-Power ADC with Internal Reference |
| MAX1448 | LAST TIME BUY | 10-Bit, 80Msps, Single 3.0V, Low-Power ADC with Internal Reference |
| MAX1449 | LAST TIME BUY | 10-Bit, 105Msps, Single +3.3V, Low-Power ADC with Internal Reference |
Evaluation Kits
Evaluation Kit for the MAX1425 and MAX1426
Evaluation Kit for the MAX1425 and MAX1426
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