AD7398BRU Analog Devices Inc, AD7398BRU Datasheet
AD7398BRU
Specifications of AD7398BRU
Available stocks
Related parts for AD7398BRU
AD7398BRU Summary of contents
Page 1
FEATURES AD7398—12-bit resolution AD7399—10-bit resolution Programmable power shutdown Single ( dual (±5 V) supply operation 3-wire, serial SPI®-compatible interface Internal power-on reset Double buffered registers for simultaneous multichannel DAC update Four separate rail-to-rail reference inputs ...
Page 2
AD7398/AD7399 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 AD7398 12-Bit Voltage Output DAC ........................................ 3 AD7399 10-Bit Voltage Output DAC ........................................ 4 ...
Page 3
SPECIFICATIONS AD7398 12-BIT VOLTAGE OUTPUT DAC Table 1. Parameter Symbol STATIC PERFORMANCE Resolution N 1 Relative Accuracy 2 INL Differential Nonlinearity 2 ...
Page 4
AD7398/AD7399 Parameter Symbol SUPPLY CHARACTERISTICS Shutdown Supply Current I DD_SD Positive Supply Current Negative Supply Current I SS Power Dissipation P DISS Power Supply Sensitivity PSS 1 One LSB = V /4096 V for the 12-bit ...
Page 5
Parameter Symbol AC CHARACTERISTICS Output Slew Rate SR Settling Time Shutdown Recovery t SDR DAC Glitch Q Digital Feedthrough Q DF Feedthrough V /V OUT SUPPLY CHARACTERISTICS Shutdown Supply Current I DD_SD Positive Supply Current I DD ...
Page 6
AD7398/AD7399 ABSOLUTE MAXIMUM RATINGS Table 3. Parameter Rating V to GND −0 GND +0.3 V, − GND REF SS Logic Inputs to GND −0 ...
Page 7
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 4. Pin Function Descriptions Pin No. Mnemonic Description DAC B Voltage Output. OUT DAC A Voltage Output. OUT 3 V Negative Power Supply Input. Specified range of operation ...
Page 8
AD7398/AD7399 INPUT REGISTERS AD7398 SERIAL INPUT REGISTER DATA FORMAT Data is loaded in the MSB first format. MSB B15 B14 B13 B12 NOTE Bit Position B14 and Bit Position B15 are the SD and SA power ...
Page 9
TERMINOLOGY Relative Accuracy (INL) For the DAC, relative accuracy or integral nonlinearity (INL measure of the maximum deviation, in LSBs, from a straight line passing through the endpoints of the DAC transfer function. Figure 6 illustrates a typical ...
Page 10
AD7398/AD7399 TYPICAL PERFORMANCE CHARACTERISTICS 1.50 1.25 1.00 0.75 0.50 0.25 0 –0.25 –0.50 –0.75 –1.00 0 512 1024 1536 2048 2560 CODE (Decimal) Figure 6. AD7398 INL vs. Code (T 0.50 0.25 0 –0. 25° +5V, ...
Page 11
DNL 0.50 0.25 INL 0 FSE –0.25 –0.50 –0.75 –1.00 –5 –4 –3 –2 – REFERENCE VOLTAGE (V) Figure 10. AD7398 INL, DNL, FSE vs. Reference Voltage 100 ...
Page 12
AD7398/AD7399 100 TIME (100ns/DIV) Figure 16. AD7398 Digital Feedthrough V = +5V –5V + REF DLY 54µs 100 TIME (5µs/DIV) Figure 17. AD7398 Large Signal Settling ...
Page 13
AD7398/AD7399 –5V SS 2.5 2.0 1.5 1.0 0.5 0 – 100 TEMPERATURE (°C) Figure 22. Supply Current vs. Temperature 36 AD7398/AD7399 – ...
Page 14
AD7398/AD7399 THEORY OF OPERATION CS CLK SDI SERIAL REGISTER The AD7398/AD7399 contain four 12-bit and 10-bit, respectively, voltage output, digital-to-analog converters. Each DAC has its own independent multiplying reference input. Both the AD7398 and AD7399 use a 3-wire, SPI-compatible serial ...
Page 15
OPERATION WITH V EQUAL TO THE SUPPLY REF The AD7398/AD7399 are designed to approach the full output voltage swing from ground swing is achieved when the corresponding V to the same power supply. This power ...
Page 16
AD7398/AD7399 POWER-ON RESET When the V power supply is turned on, an internal reset DD strobe forces all the input and DAC registers to the zero-code state. The V power supply should have a smooth positive DD ramp without drooping ...
Page 17
Note that the 80C51/80L51 provide the LSB first, although the AD7398/AD7399 expect the MSB of the 16-bit/14-bit word first. Care should be taken to ensure the transmit routine takes this into account. This can usually be done with software by ...
Page 18
AD7398/AD7399 APPLICATIONS INFORMATION STAIRCASE WINDOWS COMPARATOR Many applications need to determine whether voltage levels are within predetermined limits. Some requirements are for nonoverlapping windows and others for overlapping windows. Both circuit configurations are shown in Figure 33 and Figure 34, ...
Page 19
PROGRAMMABLE DAC REFERENCE VOLTAGE With the flexibility of the AD7398/AD7399, one of the internal DACs can be used to control a common programmable V for the remainder of the DACs. The circuit configuration is shown in Figure 37. The relationship ...
Page 20
AD7398/AD7399 OUTLINE DIMENSIONS 0.30 (0.0118) 0.10 (0.0039) COPLANARITY 0.10 0.15 0.05 10.50 (0.4134) 10.10 (0.3976 7.60 (0.2992) 7.40 (0.2913) 1 10.65 (0.4193) 8 10.00 (0.3937) 1.27 (0.0500) BSC 2.65 (0.1043) 2.35 (0.0925) SEATING 0.51 (0.0201) 0.33 (0.0130) PLANE ...
Page 21
... ORDERING GUIDE 1, 2 Model Resolution (Bits) AD7398BR 12 AD7398BR-REEL 12 AD7398BRZ 12 AD7398BRZ-REEL 12 AD7398BRU 12 AD7398BRU-REEL7 12 AD7398BRUZ 12 AD7398BRUZ-REEL7 12 AD7398WBRUZ-RL7 12 AD7399BR 10 AD7399BR-REEL 10 AD7399BRZ 10 AD7399BRZ-REEL 10 AD7399BRU 10 AD7399BRU-REEL7 10 AD7399BRUZ 10 AD7399BRUZ-REEL7 RoHS Compliant Part Qualified for Automotive Applications. The AD7398 contains 3254 transistors. The die size measures 108 mils × 144 mils. ...
Page 22
AD7398/AD7399 NOTES Rev Page ...
Page 23
NOTES Rev Page AD7398/AD7399 ...
Page 24
AD7398/AD7399 NOTES ©2000–2011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D02179-0-1/11(C) Rev Page ...