数据搜索系统,热门电子元器件搜索 |
|
AD7538KR 数据表(PDF) 4 Page - Analog Devices |
|
AD7538KR 数据表(HTML) 4 Page - Analog Devices |
4 / 8 page AD7538 REV. A –4– TERMINOLOGY RELATIVE ACCURACY Relative accuracy or endpoint nonlinearity is a measure of the maximum deviation from a straight line passing through the endpoints of the DAC transfer function. It is measured after ad- justing for zero error and full-scale error and is normally ex- pressed in Least Significant Bits or as a percentage of full-scale reading. DIFFERENTIAL NONLINEARITY Differential nonlinearity is the difference between the measured change and the ideal 1 LSB change between any two adjacent codes. A specified differential nonlinearity of ±1 LSB max over the operating temperature range ensures monotonicity. GAIN ERROR Gain error is a measure of the output error between an ideal DAC and the actual device output. It is measured with all 1s in the DAC after offset error has been adjusted out and is expressed in Least Significant Bits. Gain error is adjustable to zero with an external potentiometer. DIGITAL-TO-ANALOG GLITCH IMPULSE The amount of charge injected from the digital inputs to the analog output when the inputs change state is called Digital- to-Analog Glitch Impulse. This is normally specified as the area of the glitch in either pA-secs or nV-secs depending upon whether the glitch is measured as a current or voltage. It is mea- sured with VREF = AGND. OUTPUT CAPACITANCE This is the capacitance from IOUT to AGND. OUTPUT LEAKAGE CURRENT Output Leakage Current is current which appears at IOUT with the DAC register loaded to all 0s. MULTIPLYING FEEDTHROUGH ERROR This is the ac error due to capacitive feedthrough from VREF terminal to IOUT with DAC register loaded to all zeros. ORDERING GUIDE Temperature Relative Full-Scale Package Model Range Accuracy Error Option* AD7538JN 0 °C to +70°C ±2 LSB ±8 LSB N-24 AD7538KN 0 °C to +70°C ±1 LSB ±4 LSB N-24 AD7538JR 0 °C to +70°C ±2 LSB ±8 LSB R-24 AD7538KR 0 °C to +70°C ±1 LSB ±4 LSB R-24 AD7538AQ –25 °C to +85°C ±2 LSB ±8 LSB Q-24 AD7538BQ –25 °C to +85°C ±1 LSB ±4 LSB Q-24 AD7538SQ –55 °C to +125°C ±2 LSB ±8 LSB Q-24 AD7538TQ –55 °C to +125°C ±1 LSB ±4 LSB Q-24 *N = Plastic DIP; Q = Cerdip; R = SOIC. PIN FUNCTION DESCRIPTION Pin Mnemonic Description 11VREF Voltage Reference. 12RFB Feedback Resistor. Used to close the loop around an external op amp. 13IOUT Current Output Terminal. 14 AGND Analog Ground 15 DGND Digital Ground 6–19 DB13–DB0 Data Inputs. Bit 13 (MSB) to Bit 0 (LSB). 20 LDAC Chip Select Input. Active LOW. 21 CS Asynchronous Load DAC Input. Active LOW. 22 WR Write Input. Active LOW. CS LDAC WR OPERATION 0 1 0 Load Input Register. 1 0 X Load DAC Register from Input Register. 0 0 0 Input and DAC Registers are Transparent. 1 1 X No Operation. X 1 1 No Operation. NOTE: X Don’t Care. 23 VDD +12 V to +15 V supply input. 24 VSS Bias pin for High Temperature Low Leakage configuration. To implement low leakage system, the pin should be at a negative voltage. See Figures 4 and 5 for recommended circuitry. |
类似零件编号 - AD7538KR |
|
类似说明 - AD7538KR |
|
|
链接网址 |
隐私政策 |
ALLDATASHEETCN.COM |
ALLDATASHEET是否为您带来帮助? [ DONATE ] |
关于 Alldatasheet | 广告服务 | 联系我们 | 隐私政策 | 链接交换 | 制造商名单 All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |