AD5321BRT Analog Devices, AD5321BRT Datasheet

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AD5321BRT

Manufacturer Part Number
AD5321BRT
Description
Manufacturer
Analog Devices
Datasheet

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a
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
I
*Protected by U.S. Patent No. 5684481, other patent pending.
REV. 0
2
C is a registered trademark of Philips Corporation.
FEATURES
AD5301: Buffered Voltage Output 8-Bit DAC
AD5311: Buffered Voltage Output 10-Bit DAC
AD5321: Buffered Voltage Output 12-Bit DAC
6-Lead SOT-23 and 8-Lead SOIC Packages
Micropower Operation: 120
2-Wire (I
Data Readback Capability
+2.5 V to +5.5 V Power Supply
Guaranteed Monotonic By Design Over All Codes
Power-Down to 50 nA @ 3 V
Reference Derived from Power Supply
Power-On-Reset to Zero Volts
On-Chip Rail-to-Rail Output Buffer Amplifier
Three Power-Down Functions
APPLICATIONS
Portable Battery Powered Instruments
Digital Gain and Offset Adjustment
Programmable Voltage and Current Sources
Programmable Attenuators
2
C
®
Compatible) Serial Interface
SDA
SCL
A1*
A0
*AVAILABLE ON 8-LEAD VERSION ONLY
A @ 3 V
INTERFACE
POWER-ON
RESET
LOGIC
GND
+2.5 V to +5.5 V, 120 A, 2-Wire Interface,
FUNCTIONAL BLOCK DIAGRAM
REGISTER
DAC
Voltage Output 8-/10-/12-Bit DACs
8-/10-/12-BIT
REF
V
DAC
DD
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
GENERAL DESCRIPTION
The AD5301/AD5311/AD5321 are single 8-, 10- and 12-bit
buffered voltage-output DACs that operate from a single +2.5 V
to +5.5 V supply consuming 120 A at 3 V. The on-chip output
amplifier allows rail-to-rail output swing with a slew rate of
0.7 V/ s. It uses a 2-wire (I
operates at clock rates up to 400 kHz. Multiple devices can
share the same bus.
The reference for the DAC is derived from the power supply
inputs and thus gives the widest dynamic output range. These
parts incorporate a power-on-reset circuit, which ensures that
the DAC output powers-up to zero volts and remains there until
a valid write takes place. The parts contain a power-down feature
which reduces the current consumption of the device to 50 nA
at 3 V and provides software-selectable output loads while in
power-down mode.
The low power consumption in normal operation make these
DACs ideally suited to portable battery-operated equipment.
The power consumption is 0.75 mW at 5 V, 0.36 mW at 3 V
reducing to 1 W in all power-down modes.
AD5301/AD5311/AD5321
POWER-DOWN
AD5301/AD5311/AD5321*
LOGIC
PD*
BUFFER
World Wide Web Site: http://www.analog.com
RESISTOR
NETWORK
2
C compatible) serial interface that
V
OUT
© Analog Devices, Inc., 1999

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AD5321BRT Summary of contents

Page 1

... registered trademark of Philips Corporation. *Protected by U.S. Patent No. 5684481, other patent pending. REV. 0 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 which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices ...

Page 2

AD5301/AD5311/AD5321–SPECIFICATIONS C = 200 pF to GND; All specifications T L MIN 1 Parameter PERFORMANCE AD5301 Resolution Relative Accuracy Differential Nonlinearity AD5311 Resolution Relative Accuracy Differential Nonlinearity AD5321 Resolution Relative Accuracy Differential Nonlinearity Zero Code Error Full-Scale ...

Page 3

DD AC CHARACTERISTICS otherwise noted.) 2 Parameter Output Voltage Settling Time AD5301 AD5311 AD5321 Slew Rate Major-Code Change Glitch Impulse Digital Feedthrough NOTES 1 See Terminology 2 Guaranteed by design and characterization, not production tested. 3 Temperature ranges ...

Page 4

... AD5301BRM – +105 C AD5311BRT – +105 C AD5311BRM – +105 C AD5321BRT – +105 C AD5321BRM – +105 C CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. ...

Page 5

SOIC SOT-23 Pin No. Pin No. Mnemonic Function Power Supply Input. These parts can be operated from +2 +5.5 V and the supply DD should be decoupled with parallel with a ...

Page 6

AD5301/AD5311/AD5321 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 actual endpoints of the DAC transfer function. Typical INL vs. Code ...

Page 7

Typical Performance Characteristics– +5V DD 0.5 0 –0.5 –1.0 50 100 150 200 250 0 CODE Figure 2. AD5301 Typical INL Plot 0 + +5V DD ...

Page 8

AD5301/AD5311/AD5321 5 5V SOURCE SOURCE 2 3V SINK 1 5V SINK – mA Figure 11. Source and Sink Current Capability 1.0 0.8 0.6 0.4 –40 C +25 C 0.2 ...

Page 9

Figure 20. Digital Feedthrough GENERAL DESCRIPTION The AD5301/AD5311/AD5321 are single resistor-string DACs fabricated on a CMOS process with resolutions and 12 bits respectively. Data is written via a 2-wire serial interface. They ...

Page 10

AD5301/AD5311/AD5321 SERIAL INTERFACE 2-WIRE SERIAL BUS The AD5301/AD5311/AD5321 are controlled via an I compatible serial bus. The DACs are connected to this bus as slave devices (no clock is generated by the AD5301/AD5311/ AD5321 DACs). The AD5301/AD5311/AD5321 has a 7-bit ...

Page 11

WRITE OPERATION When writing to the AD5301/AD5311/AD5321 DACs, the user must begin with an address byte, after which the DAC will acknowledge that it is prepared to receive data by pulling SDA SCL SDA START COND ADDRESS ...

Page 12

AD5301/AD5311/AD5321 READ OPERATION When reading data back from the AD5301/AD5311/AD5321 DACs, the user must begin with an address byte after which the DAC will acknowledge that it is prepared to transmit data by pulling SDA low. There are two different ...

Page 13

POWER-DOWN MODES The AD5301/AD5311/AD5321 have very low power consump- tion, dissipating typically 0.36 mW with supply and 0.75 mW with supply. Power consumption can be further reduced when the DAC is not in use ...

Page 14

AD5301/AD5311/AD5321 The output voltage for any input code can be calculated as follows [(V (D/2 ) (R1 + R2)/R1) – V OUT DD where D is the decimal equivalent of the code loaded to the DAC. N ...

Page 15

REV. 0 OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 6-Lead SOT-23 (RT-6) 0.122 (3.10) 0.106 (2.70 0.118 (3.00) 0.098 (2.50 PIN 1 0.037 (0.95) BSC ...

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