AD7893

Fast 12-Bit ADC with 6 ms Conversion Time 8-Pin Mini-DlP and SOIC Single Supply Operation High Speed, Easy-to-Use, Serial Interface On-Chip Track/Hold Amplifier Selection of Input Ranges
610 V for AD7893-10 62.5 V for AD7893-3 0 V to +2.5 V for AD7893-2 0 V to +5 V for AD7893-5 Low Power: 25 mW typ

(TA = +25°C unless otherwise noted)
VDD to AGND . . . . . . . . . . . . . . . . . . . . . . . . . ....................................0.3 V to +7 V
VDD to DGND . . . . . . . . . . . . . . . . . . . . . . . . ..................................... 0.3 V to +7 V
Analog Input Voltage to AGND
AD7893-10, AD7893-5 . . . . . . . . . . . . . . . . . . . . . . ........................................ ±17 V
AD7893-2, AD7893-3 . . . . . . . . . . . . . . . . . . . ........................................5 V, +10 V
Reference Input Voltage to AGND . . ...................................... 0.3 V to VDD + 0.3 V
Digital Input Voltage to DGND . . . . . .......................................0.3 V to VDD + 0.3 V
Digital Output Voltage to DGND . . . ........................................ 0.3 V to VDD + 0.3 V
Operating Temperature Range
Commercial (A, B Versions) . . . . . . . . . . ............................................ 40 to +85
Extended (S Version) . . . . . . . . . . . . . . . ......................................... 55 to +125
Storage Temperature Range . . . . . . . . . . . ...................................... 65 to +150
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . ...................................... +150
Plastic DIP Package, Power Dissipation . . . . . . . . . ........................................ 450 mW
qJA Thermal Impedance . . . . . . . . . . . . . . . . . . . . . ........................................130/W
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . ......................................... +260
Cerdip Package, Power Dissipation . . . . . . . . . . . . . . ......................................450 mW
qJA Thermal Impedance . . . . . . . . . . . . . . . . . . . . .......................................... 125/W
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . ........................................... +300
SOIC Package, Power Dissipation . . . . . . . . . . . . . . ........................................ 450 mW
qJA Thermal Impedance . . . . . . . . . . . . . . . . . . . . ........................................... 170/W
Lead Temperature, Soldering
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . ............................................... +215
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . .............................................. +220

*Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those listed in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

The AD7893 is a fast, 12-bit ADC that operates from a single +5 V supply and is housed in a small 8-pin mini-DIP and 8-pin SOIC. The part contains a 6 ms successive approximation A/D
converter, an on-chip track/hold amplifier, an on-chip clock and a high speed serial interface.

Output data from the AD7893 is provided via a high speed, serial interface port. This two-wire serial interface has a serial clock input and a serial data output with the external serial clock accessing the serial data from the part.

In addition to traditional dc accuracy specifications such as linearity, full-scale and offset errors, the AD7893 is also specified for dynamic performance parameters, including harmonic distortion and signal-to-noise ratio.

The part accepts an analog input range of ±10 V (AD7893-10), ±2.5 V (AD7893-3), 0 V to +5 V (AD7893-5) or 0 V to +2.5 V (AD7893-2) and operates from a single +5 V supply, consuming only 25 mW typical.

The AD7893 is fabricated in Analog Devices' Linear Compatible CMOS (LC²MOS) process, a mixed technology process that combines precision bipolar circuits with low power CMOS logic. The part is available in a small, 8-pin, 0.3" wide, plastic or hermetic dual-in-line package (mini-DIP) and in an 8-pin, small outline IC (SOIC).