The AT28C256 is a high-performance electrically erasable and programmable read only memory. Its 256K of memory is organized as 32,768 words by 8 bits. Manufactured with Atmel’s advanced nonvolatile CMOS technology, the device offers access times to 150 ns with power dissipation of just 440 mW. When the device is deselected, the CMOS standby current is less than 200 µA.
1 Automatic Page Write Operation (1) Internal Address and Data Latches for 64 Bytes (2) Internal Control Timer
2. Fast Write Cycle Times (1) Page Write Cycle Time: 3 ms or 10 ms Maximum (2) 1 to 64-byte Page Write Operation
3. Low Power Dissipation (1) 50 mA Active Current (2) 200 µA CMOS Standby Current
The AD8290 contains both an adjustable current source to drive a sensor and a difference amplifier to amplify the signal voltage. The amplifier is set for a fixed gain of 50. The AD8290 is an excellent solution for both the drive and the sensing aspects required for pressure, temperature, and strain gage bridges. In addition, because the AD8290 operates with low power, works with a range of low supply voltages, and is available in a low profile package, it is suitable for drive/sense circuits in portable electronics as well. The AD8290 is available in a lead free 3.0 mm × 3.0 mm ×0.55 mm package and is operational over the industrial temperature range of −40°C to +85°C.
1. Supply voltage range : 2.6 V to 5.5 V 2. Low power (1) 1.2 mA + 2× excitation current (2) 0.5 μA shutdown current 3. Low input bias current: ±100 pA 4. High CMRR: 120 dB 5. Space savings: 16-lead, 3.0 mm × 3.0 mm × 0.55 mm LFCSP 6. Excitation current (1) 300 μA to 1300 μA range (2) Set with external resistor
1. Bridge and sensor drives 2. Portable electronics