Analog Devices Inc. AD7940BRMZ-REEL7

Description
The AD7940 is a 14-bit, fast, low-power, successive approximation ADC. It operates from a single 2.5 V to 5.5 V power supply and features throughput rates up to 100 kSPS. The part contains a low noise, wide bandwidth track-and-hold amplifier that can handle input frequencies in excess of 7 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 pipelined delays associated with the part.
The AD7940 uses advanced design techniques to achieve very low power dissipation at fast throughput rates. The reference for the part is taken internally from Voo, which allows the widest dynamic input range to the ADC. Thus, the analog input range for this part is 0 V to Voo. The conversion rate is determined by the SCLK frequency.

Features
Fast throughput rate: 100 kSPS
Specified for Voo of 2.5 V to 5.5 V
Low power
4 mW typ at 100 kSPS with 3 V supplies
17 mW typ at 100 kSPS with 5 V supplies
Wide input bandwidth: 81 dB SINAD at 10 kHz input frequency
Flexible power/serial clock speed management
No pipeline delays
High speed serial interface
SPI/QSPI/MICROWIRE/DSP compatible
Standby mode: 0.5 μA max
6-Lead SOT-23 and 8-Lead MSOP packages

Applications
Battery-powered systems
Personal digital assistants
Medical instruments
Mobile communications
Instrumentation and control systems
Remote data acquisition systems