AD7910ARMZ

The AD7910/AD79201 are, respectively, 10-bit and 12-bit, high speed, low power, successive approximation ADCs. The parts operate from a single 2.35 V to 5.25 V power supply and feature throughput rates up to 250 kSPS. 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 initiated at this point. There are no pipeline delays associated with the part. The AD7910/AD7920 use advanced design techniques to achieve very low power dissipation at high throughput rates. The reference for the part is taken internally from VDD. This allows the widest dynamic input range to the ADC. Thus, the analog input range for the part is 0 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

• Throughput rate: 250 kSPS
• Specified for VDD of 2.35 V to 5.25 V
• Low power 3.6 mW typ at 250 kSPS with 3 V supplies 12.5 mW typ at 250 kSPS 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: μA max
• 6-lead SC70 package
• 8-lead MSOP package