Zakładka z wyszukiwarką danych komponentów |
|
ADC700RH Arkusz danych(PDF) 6 Page - Burr-Brown (TI) |
|
|
ADC700RH Arkusz danych(HTML) 6 Page - Burr-Brown (TI) |
6 / 12 page 6 ® ADC700 TWO’S COMPLEMENT DATA CODE BTCEN (pin 23) is a logic function that implements the Binary Two’s Complement output code for bipolar (+ and –) analog input signal operation. This feature is compatible with twos complement arithmetic in microprocessor math algorithms. INTERNAL CLOCK The ADC700 has a self-contained clock to sequence the A/D logic. The clock is not available externally. An external 16-pulse strobe (pin 14) is brought out to clock serial data only. Use of ADC700 with external clock is not possible. INTERNAL VOLTAGE REFERENCE The ADC700 has an internal low-noise buried-zener voltage reference. The reference circuit has been drift compensated over the MIL temperature range using a laser trim algorithm. The reference voltage is not available externally. DISCUSSION OF SPECIFICATIONS BASIC DEFINITIONS Refer to Figure 3 for an illustration of A/D converter terminology and to Table II in the Calibration section. Full Scale Range, FSR The nominal range of the A/D converter. For ADC700, the FSR is 20V for the 0V to +20V and the –10V to +10V input ranges or 10V for the 0V to +10V and –5V to +5V input ranges. Least Significant Bit, LSB The smallest analog input change resolved by the A/D converter. For an A/D converter with N bits output, the input value of the LSB is FSR(2–N). FIGURE 1. Load Circuits for Access Time. DBN 3k Ω C L DGND DBN 3k Ω C L DGND 5V A) High-Z to V OH (t3) and V OL (t 6). to V OH B) High-Z to V OL (t3) and V OH (t 6). to V OL Most Significant Bit, MSB That binary digit that has the greatest value or weight. The MSB weight is FSR/2. Resolution An N-bit binary-coded A/D converter resolves the analog input into 2N values represented by the 2N digital output codes. ACCURACY Linearity Error, Integral Linearity Error (ILE) Linearity Error is defined as the deviation of actual analog input values from the ideal values about a straight line drawn through the code mid-points near positive full scale (at +V FS –1LSB) and at Zero input (at 1/2LSB below the first code transition, i.e. at Zero) or, in the case of bipolar operation, near minus full scale (at 1/2LSB below the first code transition, i.e. at –V FS). Despite the definition, however, code transitions are easier to measure than code midpoints. Therefore linearity is measured as the deviation of the analog input values from a line drawn between the first and last code transitions. Linearity Error specifications are ex- pressed in % of Full Scale Range (FSR). ADC700KH ILE is ±0.003% of FSR which is 1/2 LSB at 14-bits. Differential Linearity Error (DLE), No Missing Codes Differential Linearity Error is defined as the deviation in code width from the ideal value of 1LSB. If the DLE is greater than –1LSB anywhere along the range, the A/D will have at least one missing code. ADC700KH is specified to have a DLE of ±0.006% of FSR, which is ±1LSB at 14 bits. ADC700KH is specified to have no missing codes at the 14- bit level over specified temperature ranges. Gain Error The deviation from the ideal magnitude of the input span between the first code midpoint (at –VFS + 1/2LSB, for bipolar operation; at Zero for unipolar operation) to the last code midpoint (VFS –1LSB). As with the linearity error DBN 3k Ω DGND DBN 3k Ω 10pF DGND 5V B) V OL to High-Z. 10pF A) V OH to High-Z. FIGURE 2. Load Circuits for Output Float Delay. FIGURE 3. Transfer Characteristic Terminology. Offset Error Shifts The Line Gain Error Rotates The Line FFFH FFEH FFDH 802H 801H 800H 7FFH 7FEH 002H 001H 000H (Bipolar Zero Transition) 1/2LSB Zero (–Full Scale) 1/2LSB 3/2LSB +Full-Scale Calibration Transition +Full Scale Zero (–Full-Scale Calibration Transition) Midscale (Bipolar Zero) Analog Input |
Podobny numer części - ADC700RH |
|
Podobny opis - ADC700RH |
|
|
Link URL |
Polityka prywatności |
ALLDATASHEET.PL |
Czy Alldatasheet okazała się pomocna? [ DONATE ] |
O Alldatasheet | Reklama | Kontakt | Polityka prywatności | Linki | Lista producentów 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 |