AD7835AS Analog Devices Inc, AD7835AS Datasheet
AD7835AS
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AD7835AS Summary of contents
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FEATURES Four 14-bit DACs in one package AD7834—serial loading AD7835—parallel 8-bit/14-bit loading Voltage outputs Power-on reset function Maximum/minimum output voltage range of ±8.192 V Maximum output voltage span Common voltage reference inputs User-assigned device addressing Clear function ...
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AD7834/AD7835 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagrams............................................................. 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 AC Performance Characteristics ................................................ 5 Timing Specifications .................................................................. 6 Absolute Maximum Ratings............................................................ 7 Thermal Resistance ...................................................................... 7 ...
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SPECIFICATIONS ± 5 ± 5 −15 V ± 5%; AGND = DGND = Table 1. Parameter A ACCURACY Resolution 14 Relative Accuracy ±2 Differential ...
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AD7834/AD7835 ± 5 ± 5 −12 V ± 5%; AGND = DGND = Table 2. Parameter A ACCURACY Resolution 14 Relative Accuracy ±2 Differential ...
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AC PERFORMANCE CHARACTERISTICS These characteristics are included for design guidance and are not subject to production testing. Table 3. Parameter DYNAMIC PERFORMANCE Output Voltage Settling Time Digital-to-Analog Glitch Impulse DC Output Impedance Channel-to-Channel Isolation DAC-to-DAC Crosstalk Digital Crosstalk Digital Feedthrough—AD7834 ...
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AD7834/AD7835 TIMING SPECIFICATIONS ± 15. Table 4. Parameter Limit at T AD7834-SPECIFIC 2 t 100 ...
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ABSOLUTE MAXIMUM RATINGS T = 25°C unless otherwise noted. Transient currents 100 mA do not cause SCR latch-up 0 possible for this to happen during power supply sequencing, the diode protection ...
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AD7834/AD7835 PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS Table 7. AD7834 Pin Function Descriptions Pin No. Pin Mnemonic DSG 3 V (−) REF 4 V (+) REF 5, 24, 25, 26 22 ...
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NC 1 PIN 1 DSGA 2 IDENTIFIER OUT OUT NC 5 AD7835 A2 6 TOP VIEW (Not to Scale CLR 9 LDAC 10 ...
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AD7834/AD7835 Pin No. MQFP Pin No. PLCC Pin Mnemonic DB0 to DB13 32 38 DSGB 36 (+)B, V REF 38 44 AGND ...
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TYPICAL PERFORMANCE CHARACTERISTICS 1.0 0.8 0.6 0.4 0.2 0 –0.2 –0.4 –0.6 –0.8 –1 CODE/1000 Figure 9. Typical INL Plot 0.5 0.4 0.3 0.2 0.1 0 –0.1 –0.2 –0.3 –0.4 –0 ...
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AD7834/AD7835 0.7 VERT = 100mV/DIV HORIZ = 1μs/DIV 0.6 0.5 0.4 0.3 0.2 0.1 0 –0.1 –0.2 Figure 15. Typical Digital/Analog Glitch Impulse 8 VERT = 2V/DIV HORIZ = 1.2μs/DIV (+) = +7V REF 2 V (–) ...
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TERMINOLOGY Relative Accuracy Relative accuracy or endpoint linearity is a measure of the maximum deviation from a straight line passing through the endpoints of the DAC transfer function measured after adjusting for zero error and full-scale error. It ...
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AD7834/AD7835 THEORY OF OPERATION DAC ARCHITECTURE Each channel consists of a segmented 14-bit R-2R voltage-mode DAC. The full-scale output voltage range is equal to the entire reference span of V (+) – V (−). The DAC coding is straight REF ...
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CONTROL BIT TO USE/IGNORE FOLLOWING 23 BITS OF INFORMATION CHANNEL ADDRESS MSB, D1 CHANNEL ADDRESS LSB, D2 PACKAGE ADDRESS MSB, PA4 PACKAGE ADDRESS, PA3 PACKAGE ADDRESS, PA2 PACKAGE ADDRESS, PA1 PACKAGE ADDRESS LSB, PA0 When 14-bit transfers are being used, ...
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AD7834/AD7835 BIPOLAR CONFIGURATION +15V R1 39kΩ 1μ (+) REF 1 AD588 AD7834 AD7835 100kΩ (–) REF 100kΩ 1 ...
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CONTROLLED POWER-ON OF THE OUTPUT STAGE A block diagram of the output stage of the AD7834/AD7835 is shown in Figure 21 capable of driving a load of 10 kΩ in parallel with 200 pF are ...
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AD7834/AD7835 DSG VOLTAGE RANGE During power-on, the V pins of the AD7834/AD7835 are OUT connected to the relevant DSG pins via G resistor, R. The DSG potential must obey the maximum ratings at all times. Thus, the voltage at DSG ...
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POWER-ON OF THE AD7834/AD7835 Power is normally applied to the AD7834/AD7835 in the following sequence: first V and V , then (+) and V (−). The V pins are not allowed to float when REF REF ...
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AD7834/AD7835 MICROPROCESSOR INTERFACING AD7834 TO 80C51 INTERFACE A serial interface between the AD7834 and the 80C51 micro- controller is shown in Figure 26. TXD of the 80C51 drives SCLK of the AD7834, while RXD drives the serial data line of ...
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First, data can be transferred using the autobuffering feature of the ADSP-2101, sending two 12-bit words directly after each other. This ensures a continuous transmit frame synchron- ization (TFS ) pulse. Second, the first data word is loaded to the ...
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AD7834/AD7835 INTERFACING THE AD7835—8-BIT INTERFACE Figure 32 shows an 8-bit interface between the AD7835 and a generic 8-bit microcontroller/DSP processor. Pin D13 to Pin D8 of the AD7835 are tied to DGND. Pin D7 to Pin D0 of the processor ...
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APPLICATIONS INFORMATION SERIAL INTERFACE TO MULTIPLE AD7834S Figure 33 shows how the package address pins of the AD7834 are used to address multiple AD7834s. This figure shows only 10 devices, but AD7834s can each be assigned a ...
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AD7834/AD7835 V +15V –15V OFFSET (+)A REF 8 V OUT 15 AD588 13 V (–)A REF OUT 9 1µF DSG A 0.1µF 1 AD7835 DSG B ...
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OUTLINE DIMENSIONS 28 0.30 (0.0118) 0.10 (0.0039) COPLANARITY 0. 0.250 (6.35) MAX 0.200 (5.08) 0.115 (2.92) 0.022 (0.56) 0.014 (0.36) 18.10 (0.7126) 17.70 (0.6969) 15 7.60 (0.2992) 7.40 (0.2913) 1 10.65 (0.4193) 14 10.00 (0.3937) 2.65 (0.1043) 2.35 ...
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AD7834/AD7835 0.048 (1.22) 0.042 (1.07) 6 0.048 (1.22) 7 PIN 1 0.042 (1.07) IDENTIFIER TOP VIEW (PINS DOWN 0.656 (16.66) 0.650 (16.51) 0.695 (17.65) 0.685 (17.40) 2.20 2.00 1.80 0.25 MIN 0.10 COPLANARITY VIEW A ROTATED 90° CCW ...
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... AD7835APZ-REEL −40°C to +85°C AD7835AS −40°C to +85°C AD7835AS-REEL −40°C to +85°C 1 AD7835ASZ −40°C to +85°C 1 AD7835ASZ-REEL −40°C to +85° RoHS Compliant Part. Linearity Error (LSBs) DNL (LSBs) ±2 ±0.9 ±2 ±0.9 ±2 ±0.9 ± ...
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AD7834/AD7835 NOTES ©2003–2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. C01006-0-8/07(D) Rev Page ...