AD7477AARMZ

The AD7476A/AD7477A/AD7478A are 12-bit, 10-bit, and 8-bit high speed, low power, successive-approximation analog-to-digital converters (ADCs), respectively. The parts operate from a single 2.35 V to 5.25 V power supply and feature throughput rates up to 1 MSPS. The parts contain a low noise, wide bandwidth track-and-hold amplifier that can handle input frequencies in excess of 13 MHz. The conversion process and data acquisition are controlled using CS and the serial clock, allowing the devices to interface with microprocessors or DSPs. The input signal is sampled on the falling edge of CS, and the conversion is also initiated at this point. There are no pipeline delays associated with the parts. The AD7476A/AD7477A/ AD7478A use advanced design techniques to achieve low power dissipation at high throughput rates. The reference for the part is taken internally from VDD to allow the widest dynamic input range to the ADC. Thus, the analog input range for the part is 0V to VDD. The conversion rate is determined by the SCLK.

Applications

• Battery-powered systems
• Personal digital assistants
• Medical instruments
• Mobile communications
• Instrumentation and control systems
• Data acquisition systems
• High speed modems
• Optical sensors

Key features

• Fast throughput rate: 1 MSPS
• Specified for VDD of 2.35 V to 5.25 V
• Low power 3.6 mW at 1 MSPS with 3 V supplies, 12.5 mW at 1 MSPS with 5 V supplies
• Wide input bandwidth 71 dB SNR at 100 kHz input frequency
• Flexible power/serial clock speed management
• No pipeline delays
• High speed serial interface SPI/QSPI/MICROWIRE/DSP compatible
• Standby mode: 1 µA maximum
• 6-lead SC70 package
• 8-lead MSOP
• Qualified for automotive applications