XRD8799

NOTE:
1 Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation at or above this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability.
2 Any input pin which can see a value outside the absolute maximum ratings should be protected by Schottky diode clamps(HP5082-2835) from input pin to the supplies. All inputs have protection diodes which will protect the device from short transients outside the supplies of less than 100mA for less than 100ms.
3 V_DD refers to AV_DD and DV_DD. GND refers to AGND and DGND.

The XRD8799 is a flexible, easy to use, precision 10- bit analog-to-digital converter with 8-channel mux that operates over a wide range of input and sampling conditions. The XRD8799 can operate with pulsed "on demand" conversion operation or continuous "pipeline" operation for sampling rates up to 2MHz. The elimination of the S/H requirements, very low power, and small package size offer the designer a low cost solution. No sample and hold is required for CCD applications up to 2MHz, or multiplexed input applications when the signal source bandwidth is limited to 100kHz. The input architecture of the XRD8799 allows direct interface to any analog input range between AGND and AV_DD (0 to 1V, 1 to 4V, 0 to 5V, etc.). The user simply sets V_REF(+) and V_REF(-) to encompass the desired input range. Scaled reference resistor taps @ 1/4 R, 1/2 R and 3/4 R allow for customizing the transfer curve as well as providing a 1/2 span reference voltage. Digital outputs are CMOS and TTL compatible.

The XRD8799 uses a two-step flash technique. The first segment converts the 5 MSBs and consists of autobalanced comparators, latches, an encoder, and buffer storage registers. The second segment converts the remaining 5 LSBs.

When the power down input is "high", the data outputs DB9 to DB0 hold the current values and V_REF(-) is disconnected from V_REF1(-). The power consumption during the power down mode is 0.1mW.