AD7829BRUZ-1

AD7829BRUZ-1 is a high-speed 8-channel, microprocessor compatible, 8bit analogue-to-digital converter with a maximum throughput of 2MSPS. It contains an on-chip reference of 2.5V (2% tolerance); a track-and-hold amplifier; a 420ns, 8bit half-flash ADC; and a high-speed parallel interface. The converter can operate from a single 3V ±10% and 5V ±10% supply. It combines the convert start and power-down functions at one pin, that is, the CONVST pin. This allows a unique automatic power-down at the end of a conversion to be implemented. The logic level on the CONVST pin is sampled after the end of conversion when an EOC (end of conversion) signal goes high, and if it is logic low at that point, the ADC is powered down. The parallel interface is designed to allow easy interfacing with microprocessors and DSPs. It is used in applications such as data acquisition systems, DSP front ends, disk drives, mobile communication systems, and subsampling applications.

• Eight single-ended analogue input channels, available with input offset adjust
• On-chip track-and-hold, SNR performance given for input frequencies upto 10MHz
• On-chip reference (2.5V), automatic power-down at the end of conversion
• Signal to (noise + distortion) ratio is 48dB minimum at (VDD = 3V ±10%, VDD = 5V ±10%)
• Total harmonic distortion is -55dB maximum at (VDD = 3V ±10%, VDD = 5V ±10%)
• Integral nonlinearity is ±0.75LSB maximum at (VDD = 3V ±10%, VDD = 5V ±10%)
• Differential nonlinearity is ±0.75LSB maximum at (VDD = 3V ±10%, VDD = 5V ±10%)
• Temperature coefficient is 50ppm/°C typical at (VDD = 3V ±10%, VDD = 5V ±10%)
• Conversion time is 420ns maximum at (VDD = 3V ±10%, VDD = 5V ±10%)
• Operating temperature range from -40°C to +85°C, 28-lead TSSOP package

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