Os motores de busca de Datasheet de Componentes eletrônicos |
|
DAC707KP-7 Folha de dados(PDF) 7 Page - Texas Instruments |
|
DAC707KP-7 Folha de dados(HTML) 7 Page - Texas Instruments |
7 / 13 page 7 ® DAC707/708/709 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 (–V CC) or logic supply (VDD) about the nominal power supply voltages (see Figure 2). It is specified for DC or low frequency changes. The typical performance curve in Figure 2 shows the effect of high frequency changes in power supply voltages. Zero Adjustment For unipolar (USB) configurations, apply the digital input code that produces zero voltage or zero current output and adjust the zero potentiometer for zero output. For bipolar (BTC) configurations, apply the digital input code that produces zero output voltage or current. See Table II for corresponding codes and connection diagrams for zero adjustments circuit connections. Zero calibration should be made before gain calibration. Gain Adjustment Apply the digital input that gives the maximum positive output voltage. Adjust the gain potentiometer for this posi- tive full-scale voltage. See Table II for positive full-scale voltages and the Connection Diagrams for gain adjustment circuit connections. FIGURE 2. Power Supply Rejection Versus Power Supply Ripple Frequency. OPERATING INSTRUCTIONS POWER SUPPLY CONNECTIONS For optimum performance and noise rejection, power supply decoupling capacitors should be added as shown in the Connection Diagram. 1 µF tantalum capacitors should be located close to the D/A converter. EXTERNAL ZERO AND GAIN ADJUSTMENT Zero and gain may be trimmed by installing external zero and gain potentiometers. Connect these potentiometers as shown in the Connection Diagram and adjust as described below. TCR of the potentiometers should be 100ppm/ °C or less. The 3.9M Ω and 270kΩ resistors (±20% carbon or better) should be located close to the D/A converter to prevent noise pickup. If it is not convenient to use these high-value resistors, an equivalent “T” network, as shown in Figure 3, may be substituted in place of the 3.9M Ω resistor. A 0.001 µF to 0.01µF ceramic capacitor should be connected from GAIN ADJUST to ANALOG COMMON to prevent noise pickup. Refer to Figures 4 and 5 for the relationship of zero and gain adjustments to unipolar D/A converters. FIGURE 3. Equivalent Resistances. 3.9M Ω 180k Ω 180k Ω 10k Ω + Full Scale Input = 0000 1LSB Range of Zero Adjust Zero Adjust Translates the Line Digital Input Input = FFFF Range of Gain Adjust Gain Adjust Rotates the Line H H FIGURE 4. Relationship of Zero and Gain Adjustments for Unipolar D/A Converters, DAC708 and DAC709. FIGURE 5. Relationship of Zero and Gain Adjustments for Bipolar D/A Converters, DAC707 and DAC708/ 709 + Full Scale 1LSB Digital Input Full Scale Range Gain Adjust Rotates the Line – Full Scale Input = 0000 Range of Gain Adjust H Input = 7FFF H Input = 8000 H Offset Adjust Translates the Line Range and Offset Adjust Power Supply Ripple Frequency (Hz) 0.030 0.025 0.020 0.015 0.010 0.005 0 1 10 100 1k 10k 100k +15V Supply +5V Supply –15V Supply |
Nº de peça semelhante - DAC707KP-7 |
|
Descrição semelhante - DAC707KP-7 |
|
|
Ligação URL |
Privacy Policy |
ALLDATASHEETPT.COM |
ALLDATASHEET é útil para você? [ DONATE ] |
Sobre Alldatasheet | Publicidade | Contato conosco | Privacy Policy | roca de Link | 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 |