AD7827BRZ

Product Summary

The AD7827BRZ is a high speed, single channel, low power, analogto-digital converter with a maximum throughput of 1 MSPS that operates from a single 3 V or 5 V supply. The AD7827BRZ contains a track/hold amplifier, an on-chip 2.5 V reference (2% tolerance), a 420 ns 8-bit half-flash ADC and a serial interface. The serial interface is compatible with the serial interfaces of most DSPs (Digital Signal Processors). The throughput rate of the AD7827BRZ is dependent on the clock speed of the DSP serial interface. The AD7827BRZ combines the Convert Start and Power Down signals at one pin, i.e., the CONVST pin. This allows a unique automatic power-down at the end of a conversion to be implemented. The logic level on the CONVST pin is sampled at the end of a conversion and, depending on its state, the AD7827BRZ powers down.

Parametrics

AD7827BRZ absolute maximum ratings: (1)VDD to GND: –0.3 V to +7 V; (2)Digital Input Voltage to GND (CONVST, SCLK): –0.3 V, VDD + 0.3 V; (3)Digital Output Voltage to GND(DOUT, RFS): –0.3 V, VDD + 0.3 V; (4)VREF to GND: –0.3 V, VDD + 0.3 V; (5)Analog Input Voltage to AGND: –0.3 V, VDD + 0.3 V; (6)Operating Temperature Range Industrial (B Version): –40℃ to +105℃ ; (7)Storage Temperature Range: –65℃ to +150℃ ; (8)Lead Temperature (Soldering, 10 sec): +300℃ ; (9)Plastic DIP Package, Power Dissipation: 450 mW; (10)qJA Thermal Impedance: +105℃ /W; (11)Lead Temperature, (Soldering 10 sec): +260℃ ; (12)SOIC Package, Power Dissipation: 50 mW; (13)qJA Thermal Impedance: +75℃ /W; (14)Lead Temperature, Soldering: Vapor Phase (60 sec): +215℃ ; Infrared (15 sec): +220℃ ; (15)ESD: 2.0 kV.

Features

AD7827BRZ features: (1)8-Bit Half-Flash ADC with 420 ns Conversion Time; (2)200 ns Acquisition Time; (3)8-Lead Package; (4)On-Chip Track-and-Hold; (5)On-Chip 2.5 V Reference with 2% Tolerance; (6)Operating Supply Range: 3 V ± 10% and 5 V ± 10%; (7)Specifications @ 3 V and 5 V; (8)DSP/Microcontroller Compatible Serial Interface; (9)Automatic Power-Down at End of Conversion; (10)Input Ranges: 0 V to 2 V, VDD = 3 V; 0 V to 2.5 V, VDD = 5 V.

Diagrams