ADC12451  Product Folder

The ADC12451 is a CMOS 12-bit plus sign successive approximation analog-to-digital converter whose dynamic specifications (S/N, THD, etc.) are tested and guaranteed. On request, the ADC12451 goes through a self-calibration cycle that adjusts linearity, zero and full-scale errors. The ADC12451 also has the ability to go through an Auto-Zero cycle that corrects the zero error during every conversion.

The analog input to the ADC12451 is tracked and held by the internal circuitry, so an external sample-and-hold is not required. The ADC12451 has a S#/H control input which directly controls the track-and-hold state of the A/D. A unipolar analog input voltage range (0V to +5V) or a bipolar range (-5V to +5V) can be accommodated with ±5V supplies.

The 13-bit data result is available on the eight outputs of the ADC12451 in two bytes, high-byte first and sign extended. The digital inputs and outputs are compatible with TTL or CMOS logic levels.

• Self-calibration provides excellent temperature stability
• Internal sample-and-hold
• 8-bit µP/DSP interface
• Bipolar input range with a single +5V reference

• Resolution: 12 bits plus sign
• Conversion Time: 7.7 µs (max)
• Sampling Rate: 83 kHz (max)
• Bipolar Signal/Noise: 73.5 dB (min)
• Total Harmonic Distortion: -78.0 dB (max)
• Aperture Time: 100 ns
• Aperture Jitter: 100 ps_rms
• Zero Error: ±2 LSB (max)
• Positive Full-Scale Error: ±1.5 LSB (max)
• Power Consumption @±5V: 113 mW (max)

• Digital Signal Processing
• Audio
• Telecommunications
• High Resolution Process Control
• Instrumentation