Product Summary

The AD7821KRZ is a high speed, 8-bit, sampling, analog-to-digital converter that offers improved performance over the popular AD7820. The AD7821KRZ offers a conversion time of 660 ns and 100 kHz signal bandwidth. The sampling instant is better defined and occurs on the falling edge of WR or RD. The provision of a VSS pin (Pin 19) allows the AD7821KRZ to operate from ±5 V supplies and to digitize bipolar input signals. Alternatively, for unipolar inputs, the VSS pin can be grounded and the AD7821KRZ will operate from a single +5 V supply, like the AD7820.

Parametrics

AD7821KRZ absolute maximum ratings: (1)VDD to GND: -0.3 V to + 7 V; (2)VSS to GND: +0.3 V to + 7 V; (3)Digital Input Voltage to GND (Pins 6–8, 13): -0.3 V to VDD + 0.3 V; (4)Digital Output Voltage to GND (Pins 2–5, 9, 14–18): -0.3 V to VDD + 0.3 V; (5)VREF(+) to GND: VSS -0.3 V to VDD + 0.3 V; (6)VREF(–) to GND: VSS -0.3 V to VDD + 0.3 V; (7)VIN to GND: VSS -0.3 V to VDD + 0.3 V; (8)Operating Temperature Range: -40℃ to +85℃; (9)Storage Temperature Range: -65℃ to +150℃; (10)Lead Temperature (Soldering, 10 secs): +300℃; (11)Power Dissipation: 450 mW.

Features

AD7821KRZ features: (1)Fast Conversion Time: 660 ns max; (2)100 kHz Track-and-Hold Function; (3)1 MHz Sample Rate; (4)Unipolar and Bipolar Input Ranges; (5)Ratiometric Reference Inputs; (6)No External Clock; (7)Extended Temperature Range Operation; (8)Skinny 20-Pin DlPs, SOIC and 20-Terminal Surface Mount Packages.

Diagrams

AD7821KRZ block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
AD7821KRZ
AD7821KRZ

IC ADC 8BIT HS TRACK/HOLD 20SOIC
Data Sheet
0-1: $11.27
1-10: $10.43
10-100: $8.91
100-250: $8.17
250-500: $7.78
500-1000: $7.52
AD7821KRZ-REEL
AD7821KRZ-REEL

IC ADC 8BIT HS TRACK/HOLD 20SOIC
Data Sheet
0-1: $11.62
1-10: $10.77
10-25: $9.87
25-100: $9.19
100-250: $8.40
250-500: $8.01