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AD5622 Schematic ( PDF Datasheet ) - Analog Devices

Teilenummer AD5622
Beschreibung 8-/10-/12-Bit nanoDACs
Hersteller Analog Devices
Logo Analog Devices Logo 




Gesamt 24 Seiten
AD5622 Datasheet, Funktion
Data Sheet
2.7 V to 5.5 V, <100 μA, 8-/10-/12-Bit nanoDACs with
I2C Compatible Interface in LFCSP and SC70
AD5602/AD5612/AD5622
FEATURES
Single 8-, 10-, 12-bit DACs, 2 LSB INL
6-lead LFCSP and SC70 packages
Micropower operation: 100 μA maximum at 5 V
Power down to <150 nA at 3 V
2.7 V to 5.5 V power supply
Guaranteed monotonic by design
Power-on reset to 0 V with brownout detection
3 power-down functions
I2C compatible serial interface supports standard (100 kHz),
fast (400 kHz), and high speed (3.4 MHz) modes
On-chip output buffer amplifier, rail-to-rail operation
Qualified for automotive applications
APPLICATIONS
Process control
Data acquisition systems
Portable battery-powered instruments
Digital gain and offset adjustment
Programmable voltage and current sources
Programmable attenuators
FUNCTIONAL BLOCK DIAGRAM
VDD GND
POWER-ON
RESET
AD5602/AD5612/AD5622
DAC
REGISTER
REF(+)
8-/10-/12-BIT
DAC
OUTPUT
BUFFER
VOUT
INPUT
CONTROL
LOGIC
POWER-DOWN
CONTROL LOGIC
RESISTOR
NETWORK
ADDR SCL SDA
Figure 1.
Table 1. Related Devices
Device No.
AD5601/AD5611/AD5621
Description
2.7 V to 5.5 V, <100 μA, 8-, 10-, 12-bit
nanoDAC with SPI interface in tiny
LFCSP and SC70 packages
GENERAL DESCRIPTION
The AD5602/AD5612/AD5622, members of the nanoDAC®
family, are single 8-, 10-, 12-bit buffered voltage-out digital-to-
analog converters (DAC) that operate from a single 2.7 V to
5.5 V supply, consuming <100 μA at 5 V. These DACs come in
tiny LFCSP and SC70 packages. Each DAC contains an on-chip
precision output amplifier that allows rail-to-rail output swing
to be achieved.
The AD5602/AD5612/AD5622 use a 2-wire I2C compatible
serial interface that operates in standard (100 kHz), fast (400 kHz),
and high speed (3.4 MHz) modes.
The references for AD5602/AD5612/AD5622 derive from the
power supply inputs to give the widest dynamic output range. Each
device incorporates a power-on reset circuit that ensures the DAC
output powers up to 0 V and remains there until a valid write takes
place to the device. The devices contain a power-down feature
that reduces the current consumption of the devices to <150 nA
at 3 V and provides software selectable output loads while in
power-down mode. The devices are put into power-down mode
over the serial interface. The low power consumption of the
AD5602/AD5612/AD5622 in normal operation makes them
ideally suited for use in portable, battery operated equipment.
The typical power consumption is 0.4 mW at 5 V.
Rev. D
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
PRODUCT HIGHLIGHTS
1. Available in 6-lead LFCSP and SC70 packages.
2. Maximum 100 μA power consumption, single-supply
operation. These devices operate from a single 2.7 V to 5.5 V
supply, typically consuming 0.2 mW at 3 V and 0.4 mW at
5 V, making them ideal for battery-powered applications.
3. The on-chip output buffer amplifier allows the output of
the DAC to swing rail-to-rail with a typical slew rate of
0.5 V/μs.
4. Reference derived from the power supply.
5. Standard, fast, and high speed mode I2C interface.
6. Designed for very low power consumption.
7. Power-down capability. When powered down, the DAC
typically consumes <150 nA at 3 V.
8. Power-on reset and brownout detection.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2005–2015 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com






AD5622 Datasheet, Funktion
AD5602/AD5612/AD5622
ABSOLUTE MAXIMUM RATINGS
TA = 25°C, unless otherwise noted.
Table 4.
Parameter
VDD to GND
Digital Input Voltage to GND
VOUT to GND
Operating Temperature Range
Storage Temperature Range
Maximum Junction Temperature
SC70 Package
θJA Thermal Impedance
θJC Thermal Impedance
LFCSP Package
θJA Thermal Impedance
Lead Temperature, Soldering
Vapor Phase (60 sec)
Infrared (15 sec)
ESD
Rating
–0.3 V to + 7.0 V
–0.3 V to VDD + 0.3 V
–0.3 V to VDD + 0.3 V
−40°C to +125°C
–65°C to +160°C
150°C
332°C/W
120°C/W
95°C/W
215°C
220°C
2.0 kV
Data Sheet
Stresses at or above those listed under Absolute Maximum
Ratings may cause permanent damage to the product. This is a
stress rating only; functional operation of the product at these
or any other conditions above those indicated in the operational
section of this specification is not implied. Operation beyond
the maximum operating conditions for extended periods may
affect product reliability.
ESD CAUTION
Rev. D | Page 6 of 24

6 Page









AD5622 pdf, datenblatt
AD5602/AD5612/AD5622
CH1
VDD = 5V
TA = 25°C
CH2
CH1 = 5V/DIV, CH2 = 1V/DIV, TIME BASE = 2µs/DIV
Figure 29. Exiting Power-Down Mode
CH1
VDD = 5V
TA = 25°C
CH2
CH1 = 5V/DIV, CH2 = 1V/DIV, TIME BASE = 2µs/DIV
Figure 30. Full-Scale Settling Time
CH1
VDD = 5V
TA = 25°C
CH2
CH1 = 5V/DIV, CH2 = 1V/DIV, TIME BASE = 2µs/DIV
Figure 31. Half Scale Settling Time
Data Sheet
CH1
VDD
VDD = 5V
TA = 25°C
CH2
VOUT
CH1 = 1V/DIV, CH2 = 3V/DIV, TIME BASE = 50µs/DIV
Figure 32. VOUT vs. VDD
2.458
2.456
2.454
2.452
2.450
2.448
2.446
2.444
2.442
2.440
2.438
2.436
0
VDD = 5V
TA = 25°C
LOAD = 2kAND 220pF
CODE 0x800 TO 0x7FF
10ns/SAMPLE NUMBER
100 200 300 400
SAMPLE NUMBER
500
Figure 33. DAC Glitch Impulse
2.4278
2.4276
2.4274
2.4272
2.4270
2.4268
2.4266
2.4264
2.4262
2.4260
0
VDD = 5V
TA = 25°C
LOAD = 2kAND 220pF
10ns/SAMPLE NUMBER
100 200
300 400
SAMPLE NUMBER
500
Figure 34. Digital Feedthrough
Rev. D | Page 12 of 24

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