Datasheet AD588 (Analog Devices) - 7
| Hersteller | Analog Devices |
| Beschreibung | Multiple Output, High Precision, Dual Tracking Reference |
| Seiten / Seite | 20 / 7 — Data Sheet. AD588. APPLICATIONS INFORMATION. CALIBRATION. Table 5. Pin … |
| Revision | M |
| Dateiformat / Größe | PDF / 550 Kb |
| Dokumentensprache | Englisch |
Data Sheet. AD588. APPLICATIONS INFORMATION. CALIBRATION. Table 5. Pin Connections. Connect. Unbuffered1. Output on Pins
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Data Sheet AD588 APPLICATIONS INFORMATION
The AD588 can be configured to provide +10 V and –10 V Amplifier A3 and Amplifier A4 can be used interchangeably. reference outputs, as shown in Figure 4 and Figure 6, respectively. However, the AD588 is tested (and the specifications are It can also be used to provide +5 V, −5 V, or a 5 V tracking guaranteed) with the amplifiers connected, as indicated in reference, as shown in Figure 5. Table 5 details the appropriate Figure 4 and Table 5. When either A3 or A4 is unused, its pin connections for each output range. In each case, Pin 9 is output force and sense pins should be connected or the input connected to system ground, and power is applied to Pin 2 tied to ground. and Pin 16. Two outputs of the same voltage can be obtained by connecting The architecture of the AD588 provides ground sense and both A3 and A4 to the appropriate unbuffered output on Pin 6, uncommitted output buffer amplifiers that offer the user a great Pin 8, or Pin 11. Performance in these dual-output configurations deal of functional flexibility. The AD588 is specified and tested typically meets data sheet specifications. in the configurations shown in Figure 6. The user can choose to take advantage of the many other configuration options available
CALIBRATION
with the AD588. However, performance in these configurations Generally, the AD588 meets the requirements of a precision is not guaranteed to meet the extremely stringent data sheet system without additional adjustment. Initial output voltage specifications. error of 1 mV and output noise specs of 10 µV p-p allow for accuracies of 12 bits to 16 bits. However, in applications where As indicated in Table 5, a +5 V buffered output can be provided an even greater level of accuracy is required, additional calibra- using Amplifier A4 in the +10 V configuration (Figure 4). A tion may be called for. Provision for trimming has been made −5 V buffered output can be provided using Amplifier A3 in the through the use of the GAIN ADJ and BAL ADJ pins (Pin 5 and −10 V configuration (Figure 6). Specifications are not guaranteed Pin 12, respectively). for the +5 V or −5 V outputs in these configurations. Performance is similar to that specified for the +10 V or −10 V outputs. The AD588 provides a precision 10 V span with a center tap (VCT) that is used with the buffer and ground sense amplifiers to As indicated in Table 5, unbuffered outputs are available at achieve the voltage output configurations in Table 5. GAIN ADJ Pin 6, Pin 8, and Pin 11. Loading of these unbuffered outputs and BAL ADJ can be used in any of these configurations to trim impairs circuit performance. the magnitude of the span voltage and the position of the center tap within the span. The gain adjust should be performed first. Although the trims are not interactive within the device, the gain trim moves the balance trim point as it changes the magnitude of the span.
Table 5. Pin Connections Connect Unbuffered1 Output on Pins Buffered Output Buffered Output on Pins Range Pin 10 to Pin −10 V −5 V 0 V +5 V +10 V Connections −10 V −5 V 0 V +5 V +10 V
+10 V 8 8 11 6 11 to 13, 14 to 15, 15 6 to 4, and 3 to 1 1 −5 V or +5 V 11 8 11 6 8 to 13, 14 to 15, 15 6 to 4, and 3 to 1 1 −10 V 6 8 11 6 8 to 13, 14 to 15, 15 11 to 4, and 3 to 1 1 +5 V 11 6 6 to 4 and 3 to 1 1 −5 V 11 8 8 to 13 and 14 to 15 15 1 Unbuffered outputs should not be loaded. Rev. M | Page 7 of 20 Document Outline FEATURES GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM PRODUCT HIGHLIGHTS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS THEORY OF OPERATION APPLICATIONS INFORMATION CALIBRATION NOISE PERFORMANCE AND REDUCTION TURN-ON TIME TEMPERATURE PERFORMANCE KELVIN CONNECTIONS DYNAMIC PERFORMANCE USING THE AD588 WITH CONVERTERS AD7535 14-BIT DIGITAL-TO-ANALOG CONVERTER AD569 16-BIT DIGITAL-TO-ANALOG CONVERTER SUBSTITUTING FOR INTERNAL REFERENCES AD574A 12-BIT ANALOG-TO-DIGITAL CONVERTER RESISTANCE TEMPERATURE DETECTOR (RTD) EXCITATION BOOSTED PRECISION CURRENT SOURCE BRIDGE DRIVER CIRCUITS OUTLINE DIMENSIONS ORDERING GUIDE
Data Sheet AD588 APPLICATIONS INFORMATION
The AD588 can be configured to provide +10 V and –10 V Amplifier A3 and Amplifier A4 can be used interchangeably. reference outputs, as shown in Figure 4 and Figure 6, respectively. However, the AD588 is tested (and the specifications are It can also be used to provide +5 V, −5 V, or a 5 V tracking guaranteed) with the amplifiers connected, as indicated in reference, as shown in Figure 5. Table 5 details the appropriate Figure 4 and Table 5. When either A3 or A4 is unused, its pin connections for each output range. In each case, Pin 9 is output force and sense pins should be connected or the input connected to system ground, and power is applied to Pin 2 tied to ground. and Pin 16. Two outputs of the same voltage can be obtained by connecting The architecture of the AD588 provides ground sense and both A3 and A4 to the appropriate unbuffered output on Pin 6, uncommitted output buffer amplifiers that offer the user a great Pin 8, or Pin 11. Performance in these dual-output configurations deal of functional flexibility. The AD588 is specified and tested typically meets data sheet specifications. in the configurations shown in Figure 6. The user can choose to take advantage of the many other configuration options available
CALIBRATION
with the AD588. However, performance in these configurations Generally, the AD588 meets the requirements of a precision is not guaranteed to meet the extremely stringent data sheet system without additional adjustment. Initial output voltage specifications. error of 1 mV and output noise specs of 10 µV p-p allow for accuracies of 12 bits to 16 bits. However, in applications where As indicated in Table 5, a +5 V buffered output can be provided an even greater level of accuracy is required, additional calibra- using Amplifier A4 in the +10 V configuration (Figure 4). A tion may be called for. Provision for trimming has been made −5 V buffered output can be provided using Amplifier A3 in the through the use of the GAIN ADJ and BAL ADJ pins (Pin 5 and −10 V configuration (Figure 6). Specifications are not guaranteed Pin 12, respectively). for the +5 V or −5 V outputs in these configurations. Performance is similar to that specified for the +10 V or −10 V outputs. The AD588 provides a precision 10 V span with a center tap (VCT) that is used with the buffer and ground sense amplifiers to As indicated in Table 5, unbuffered outputs are available at achieve the voltage output configurations in Table 5. GAIN ADJ Pin 6, Pin 8, and Pin 11. Loading of these unbuffered outputs and BAL ADJ can be used in any of these configurations to trim impairs circuit performance. the magnitude of the span voltage and the position of the center tap within the span. The gain adjust should be performed first. Although the trims are not interactive within the device, the gain trim moves the balance trim point as it changes the magnitude of the span.
Table 5. Pin Connections Connect Unbuffered1 Output on Pins Buffered Output Buffered Output on Pins Range Pin 10 to Pin −10 V −5 V 0 V +5 V +10 V Connections −10 V −5 V 0 V +5 V +10 V
+10 V 8 8 11 6 11 to 13, 14 to 15, 15 6 to 4, and 3 to 1 1 −5 V or +5 V 11 8 11 6 8 to 13, 14 to 15, 15 6 to 4, and 3 to 1 1 −10 V 6 8 11 6 8 to 13, 14 to 15, 15 11 to 4, and 3 to 1 1 +5 V 11 6 6 to 4 and 3 to 1 1 −5 V 11 8 8 to 13 and 14 to 15 15 1 Unbuffered outputs should not be loaded. Rev. M | Page 7 of 20 Document Outline FEATURES GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM PRODUCT HIGHLIGHTS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS THEORY OF OPERATION APPLICATIONS INFORMATION CALIBRATION NOISE PERFORMANCE AND REDUCTION TURN-ON TIME TEMPERATURE PERFORMANCE KELVIN CONNECTIONS DYNAMIC PERFORMANCE USING THE AD588 WITH CONVERTERS AD7535 14-BIT DIGITAL-TO-ANALOG CONVERTER AD569 16-BIT DIGITAL-TO-ANALOG CONVERTER SUBSTITUTING FOR INTERNAL REFERENCES AD574A 12-BIT ANALOG-TO-DIGITAL CONVERTER RESISTANCE TEMPERATURE DETECTOR (RTD) EXCITATION BOOSTED PRECISION CURRENT SOURCE BRIDGE DRIVER CIRCUITS OUTLINE DIMENSIONS ORDERING GUIDE