ADI AD7457BRTZ-REEL7

A 12-bit, low power, successive approximation (SAR) analog-to-digital converter that features a pseudo differential analog input. This part operates from a single 2.7 V to 5.25 V power supply and features throughput rates of up to 100 kSPS. The part contains a low noise, wide bandwidth, differential track-and-hold (T/H) amplifier that can handle input frequencies in excess of 1 MHz. The reference voltage for the AD7457 is applied externally to the V_REF pin and can range from 100 mV to V_DD, depending on what suits the application. The conversion process and data acquisition are controlled using CS and the serial clock, allowing the device to interface with microprocessors or DSPs. The SAR architecture of this part ensures that there are no pipeline delays. The AD7457 uses advanced design techniques to achieve very low power dissipation.

• Specified for V_DD of 2.7 V to 5.25 V
• Low power: 0.9 mW max at 100 kSPS with V_DD = 3 V; 3 mW max at 100 kSPS with V_DD = 5 V
• Pseudo differential analog input
• Wide input bandwidth: 70 dB SINAD at 30 kHz input frequency
• Flexible power/serial clock speed management
• No pipeline delays
• High speed serial interface—SPI-/QSPI-/MICROWIRE-/DSP-compatible
• Automatic power-down mode
• 8-lead SOT-23 package

• Transducer interface
• Battery-powered systems
• Data acquisition systems
• Portable instrumentation