Motor de Búsqueda de Datasheet de Componentes Electrónicos |
|
DAC729KH-BI Datasheet(PDF) 6 Page - Burr-Brown (TI) |
|
|
DAC729KH-BI Datasheet(HTML) 6 Page - Burr-Brown (TI) |
6 / 12 page DAC729 6 ACCURACY Linearity This specification describes one of the most important mea- sures of performance of a D/A converter. Linearity error is the deviation of the analog output versus code transfer function from a straight line drawn through the end points (all bits ON point and all bits OFF point). Differential Linearity Error Differential Linearity Error (DLE) of a D/A converter is the deviation from an ideal 1LSB change in the output from one adjacent output state to the next. A differential linearity error specification of ±1/2LSB means that the output step sizes can be between 1/2 LSB and 3/2LSB when the input changes from one adjacent input state to the next. A negative DLE specification of no more than –1LSB (–0.0015% for 16-bit resolution) insures monotonicity to 16 bits. Monotonicity Monotonicity assures that the analog output will increase or remain the same for increasing input digital codes. The DAC729KH is specified to be monotonic to 16 bits over the entire specification temperature range. DRIFT Gain Drift Gain drift is a measure of the change in the full-scale range output over temperature expressed in parts per million per degree centigrade (ppm/ °C). Gain drift is measured by: (1) testing the end point differences for each D/A at t MIN, +25°C, and t MAX; (2) calculating the gain error with respect to the +25 °C value; and (3) dividing by the temperature change. Offset Drift Offset drift is a measure of the change in the output with 3FFFF H applied to the digital inputs over the specified temperature range. The maximum change in offset at t MIN or t MAX is referenced to the offset error at +25°C and is divided by the temperature change. This drift is expressed in parts per million of full-scale range per degree centigrade (ppm of FSR/ °C). SETTLING TIME Settling time of the D/A is the total time required for the analog output to settle within an error band around its final value after a change in digital input. Settling time includes the slew time of the op amp. Voltage Output Settling times are specified to ±0.00076% of FSR scale range change of 20V (COB) or 10V (CSB) and a 1LSB change at the “major carry,” the point at which the worst- case settling time occurs. (This is the worst-case point since all of the input bits change when going from one code to the next.) Current Output Settling times are specified to ±0.00076% of FSR for a full- scale range change with an output load resistance of 10 Ω. COMPLIANCE VOLTAGE Compliance voltage applies only to the current output mode of operation. It is the maximum voltage swing allowed on the output current pin while still being able to maintain specified linearity. POWER SUPPLY SENSITIVITY Power supply sensitivity is a measure of the effect of a change in a power supply voltage on the D/A converter full- scale output. It is defined as a percent of FSR change in the output per percent of change in either the positive supply (+V CC), negative supply (–VCC), or logic supply (VDD) about the nominal power supply voltages (see Figure 1). It is specified for DC or low frequency changes. The typical performance curve in Figure 1 shows the effect of high frequency changes in power supply voltages using internal reference, DAC, and op amp. FIGURE 1. Power Supply Sensitivity vs Frequency Using Internal Reference and Op Amp. OPERATING INSTRUCTIONS POWER SUPPLY CONNECTIONS For optimum performance and noise rejection, power supply decoupling capacitors should be added as shown in Figure 2. These capacitors (1 µF to 10µF tantalum recommended) should be located at the DAC729. EXTERNAL OFFSET AND GAIN ADJUSTMENT Offset and gain may be trimmed by installing external offset and gain potentiometers. Connect these potentiometers as shown in Figure 3 and adjust as described below. TCR of the potentiometers should be 100ppm/ °C or less. The 3.9MΩ and 510k Ω resistors (20% carbon or better) should be located close to the DAC729 to prevent noise pickup. If it is not convenient to use these high-value resistors, an equivalent “T” network, as shown in Figure 4, may be substituted in place of the 3.9M Ω. A 0.001µF to 0.01µF capacitor should be connected from Gain Adjust (pin 34) to |
Número de pieza similar - DAC729KH-BI |
|
Descripción similar - DAC729KH-BI |
|
|
Enlace URL |
Política de Privacidad |
ALLDATASHEET.ES |
¿ALLDATASHEET es útil para Ud.? [ DONATE ] |
Todo acerca de Alldatasheet | Publicidad | Contáctenos | Política de Privacidad | Intercambio de Enlaces | Lista de Fabricantes 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 |