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MAX1425：10-Bit, 20Msps ADC

Low-Power, Low-Distortion 10-Bit ADCs Deliver 61dB SNR

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.

Key Features 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

MAX1425: Functional Diagram Applications/Uses CCD Pixel Processing IF and Baseband Digitization IR Focal Plane Arrays Medical Ultrasound Imaging Radar Set-Top Boxes

DataSheet

Parametrics

Design kits & evaluation modules

• MAX1425EVKIT
• MAX1426EVKIT

Related Products

• MAX1448：10-Bit, 80Msps, Single 3.0V, Low-Power ADC with Internal Reference
• MAX1444：10-Bit, 40Msps, 3.0V, Low-Power ADC with Internal Reference
• MAX1449：10-Bit, 105Msps, Single +3.3V, Low-Power ADC with Internal Reference
• MAX1446：10-Bit, 60Msps, 3.0V, Low-Power ADC with Internal Reference
• MAX1426：10-Bit, 10Msps ADC

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