AD5648ARUZ-2 Analog Devices Inc, AD5648ARUZ-2 Datasheet
AD5648ARUZ-2
Specifications of AD5648ARUZ-2
Available stocks
Related parts for AD5648ARUZ-2
AD5648ARUZ-2 Summary of contents
Page 1
FEATURES Low power, small footprint, pin-compatible octal DACs AD5668: 16 bits AD5648: 14 bits AD5628: 12 bits 14-lead/16-lead TSSOP and 16-lead LFCSP On-chip 1.25 V/2 ppm/°C reference Power down to 400 200 nA @ ...
Page 2
AD5628/AD5648/AD5668 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Product Highlights ........................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 AC Characteristics........................................................................ 6 Timing Characteristics ................................................................ 7 Absolute Maximum Ratings............................................................ 8 ESD ...
Page 3
SPECIFICATIONS kΩ to GND Table 1. Parameter Min 2 STATIC PERFORMANCE AD5628 Resolution 12 Relative Accuracy Differential Nonlinearity AD5648 Resolution 14 Relative Accuracy Differential Nonlinearity AD5668 Resolution ...
Page 4
AD5628/AD5648/AD5668 Parameter Min 3 LOGIC INPUTS Input Current Input Low Voltage, V INL Input High Voltage INH Pin Capacitance POWER REQUIREMENTS V 4 (Normal Mode 4 5 ...
Page 5
kΩ to GND Table 2. Parameter Min STATIC PERFORMANCE 2 AD5628 Resolution 12 Relative Accuracy Differential Nonlinearity AD5648 Resolution 14 Relative Accuracy Differential Nonlinearity AD5668 Resolution 16 ...
Page 6
AD5628/AD5648/AD5668 Parameter Min 3 LOGIC INPUTS Input Current Input Low Voltage, V INL Input High Voltage INH Pin Capacitance POWER REQUIREMENTS V 2 (Normal Mode 2 3 ...
Page 7
TIMING CHARACTERISTICS All input signals are specified with ns/V (10 5.5 V. All specifications T DD Table 4. Limit MIN MAX Parameter ...
Page 8
AD5628/AD5648/AD5668 ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 5. Parameter Rating V to GND −0 Digital Input Voltage to GND −0 GND −0 ...
Page 9
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS SYNC 1 14 SCLK DIN DD AD5628 GND 12 OUT AD5648 OUT OUT TOP VIEW OUT OUT ...
Page 10
AD5628/AD5648/AD5668 TYPICAL PERFORMANCE CHARACTERISTICS –2 –4 –6 –8 –10 0 10k 20k 30k 40k CODES Figure 6. INL AD5668—External Reference –1 –2 –3 – 10k CODES Figure ...
Page 11
V INT REF = 2. –5 –10 0 10k 20k 30k 40k 50k CODES Figure 12. INL AD5668-2/AD5668 EXT REF = 25° –1 ...
Page 12
AD5628/AD5648/AD5668 –2 –4 –6 –8 –10 0 10k 20k 30k 40k CODES Figure 18. INL AD5668 EXT REF = 1.25V 25° –1 ...
Page 13
–0.05 –0.10 FULL-SCALE ERROR –0.15 –0.20 GAIN ERROR –0.25 –0.30 –40 –25 – TEMPERATURE (°C) Figure 24. Gain Error and Full-Scale Error vs. Temperature ...
Page 14
AD5628/AD5648/AD5668 0.4 0.3 0.2 0 3V, INT REF = 1.25V DD 0 –0.1 –0.2 –0 5V, INT REF = 2.5V DD –0.4 –0.5 –10 –8 –6 –4 – SOURCE/SINK CURRENT (mA) Figure 30. Headroom ...
Page 15
T = 25°C A 2.1 1.9 1 1.5 1.3 1 0.9 0.7 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 V (V) LOGIC Figure 36. Supply Current vs. Logic Input Voltage ...
Page 16
AD5628/AD5648/AD5668 0.0010 EXT REF = 25°C A 0.0005 0 –0.0005 –0.0010 –0.0015 TIME (µs) Figure 42. Analog Crosstalk 0.0020 0.0015 0.0010 0.0005 0 –0.0005 –0.0010 –0.0015 0 ...
Page 17
V = 5.5V DD EXT REF = 25°C – ± 0.1V p-p REF FREQUENCY = 10kHz –40 –60 –80 –100 –120 –140 0 2000 4000 6000 FREQUENCY (Hz) Figure 48. Total Harmonic ...
Page 18
AD5628/AD5648/AD5668 TERMINOLOGY Relative Accuracy 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 to Figure 8, ...
Page 19
DAC-to-DAC Crosstalk DAC-to-DAC crosstalk is the glitch impulse transferred to the output of one DAC due to a digital code change and subsequent output change of another DAC. This includes both digital and analog crosstalk measured by loading ...
Page 20
AD5628/AD5648/AD5668 THEORY OF OPERATION D/A SECTION The AD5628/AD5648/AD5668 DACs are fabricated on a CMOS process. The architecture consists of a string of DACs followed by an output buffer amplifier. Each part includes an internal 1.25 V/2 ppm/°C reference ...
Page 21
OUTPUT AMPLIFIER The output buffer amplifier can generate rail-to-rail voltages on its output, which gives an output range amplifier is capable of driving a load of 2 kΩ in parallel with 200 pF to GND. ...
Page 22
AD5628/AD5648/AD5668 INPUT SHIFT REGISTER The input shift register is 32 bits wide. The first four bits are don’t cares. The next four bits are the command bits (see Table 7), followed by the 4-bit DAC address, A3 ...
Page 23
INTERNAL REFERENCE REGISTER The on-board reference is off at power-up by default. This allows the use of an external reference if the application requires it. The on-board reference can be turned on or off by a user-program- mable internal REF ...
Page 24
AD5628/AD5648/AD5668 Table 9. Internal Reference Register Internal REF Register (DB0 Table 10. 32-Bit Input Shift Register Contents for Reference Set-Up Command MSB DB31 to DB28 DB27 DB26 Don’t cares Command bits (C3 to C0) Table ...
Page 25
LDAC FUNCTION The outputs of all DACs can be updated simultaneously using the hardware LDAC pin. Synchronous LDAC : After new data is read, the DAC registers are updated on the falling edge of the 32 can be permanently low ...
Page 26
AD5628/AD5648/AD5668 OUTLINE DIMENSIONS 4.50 4.40 4.30 PIN 1 1.05 1.00 0.80 0.15 0.05 COPLANARITY 0.10 0.15 0.05 5.10 5.00 4. 6.40 BSC 1 7 0.65 BSC 1.20 0.20 MAX 0.09 8° SEATING 0° 0.30 PLANE 0.19 COMPLIANT TO ...
Page 27
SQ 3.90 PIN 1 INDICATOR 0.65 BSC 0.45 TOP VIEW 0.40 0.35 0.80 0.75 0.05 MAX 0.70 0.02 NOM SEATING PLANE 0.20 REF COMPLIANT TO JEDEC STANDARDS MO-220-WGGC. Figure 63. 16-Lead Lead Frame Chip Scale Package [LFCSP_WQ] 4 ...
Page 28
... AD5648BRUZ-1REEL7 −40°C to +105°C AD5648BRUZ-2 −40°C to +105°C AD5648BRUZ-2REEL7 −40°C to +105°C AD5648ARUZ-2 −40°C to +105°C AD5648ARUZ-2REEL7 −40°C to +105°C AD5668BRUZ-1 −40°C to +105°C AD5668BRUZ-1REEL7 −40°C to +105°C AD5668BRUZ-2 −40°C to +105°C AD5668BRUZ-2REEL7 − ...