AD5320BRM Analog Devices Inc, AD5320BRM Datasheet

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AD5320BRM

Manufacturer Part Number
AD5320BRM
Description
D/A Converter (D-A) IC
Manufacturer
Analog Devices Inc
Datasheet

Specifications of AD5320BRM

Resolution (bits)
12bit
Digital Ic Case Style
MSOP
No. Of Pins
8
Operating Temperature Range
-40°C To +105°C
Update Rate
0.125MSPS
Mounting Type
Surface Mount
Peak Reflow Compatible (260 C)
No
Rohs Status
RoHS non-compliant
Settling Time
8µs
Number Of Bits
12
Data Interface
DSP, MICROWIRE™, QSPI™, Serial, SPI™
Number Of Converters
1
Voltage Supply Source
Single Supply
Operating Temperature
-40°C ~ 105°C
Package / Case
8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Power Dissipation (max)
-
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

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FEATURES
Single 12-bit DAC
6-lead SOT-23 and 8-lead MSOP packages
Micropower operation: 140 μA @ 5 V
Power-down to 200 nA @ 5 V, 50 nA @ 3 V
2.7 V to 5.5 V power supply
Guaranteed monotonic by design
Reference derived from power supply
Power-on reset to zero volts
Three power-down functions
Low power serial interface with Schmitt-triggered inputs
On-chip output buffer amplifier, rail-to-rail operation
SYNC interrupt facility
APPLICATIONS
Portable battery-powered instruments
Digital gain and offset adjustment
Programmable voltage and current sources
Programmable attenuators
GENERAL DESCRIPTION
The AD5320
analog converter (DAC) that operates from a single 2.7 V to
5.5 V supply consuming 115 μA at 3 V. Its on-chip precision
output amplifier allows rail-to-rail output swing to be achieved.
The AD5320 utilizes a versatile 3-wire serial interface that
operates at clock rates up to 30 MHz and is compatible with
standard SPI®, QSPI™, MICROWIRE™ and digital signal
processing (DSP) interface standards.
The reference for AD5320 is derived from the power supply
inputs and thus gives the widest dynamic output range. The
part incorporates a power-on reset circuit that ensures that the
DAC output powers up to zero volts and remains there until a
valid write takes place to the device. The part contains a power-
down feature that reduces the current consumption of the
device to 200 nA at 5 V and provides software selectable output
loads while in power-down mode. The part is put into power-
down mode over the serial interface.
The low power consumption of this part in normal operation
makes it ideally suited to portable, battery-operated equipment.
The power consumption is 0.7 mW at 5 V reducing to 1 μW in
power-down mode.
1
Rev. C
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.
Trademarks and registered trademarks are the property of their respective owners.
Patent pending; protected by U.S. Patent No. 5684481.
1
is a single, 12-bit buffered voltage out digital-to-
2.7 V to 5.5 V, 140 μA, Rail-to-Rail Output
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
The AD5320 is one of a family of pin-compatible DACs. The
AD5300 is the 8-bit version and the AD5310 is the 10-bit
version. The AD5300/AD5310/AD5320 are available in 6-lead
SOT-23 packages and 8-lead MSOP packages.
PRODUCT HIGHLIGHTS
1.
2.
3.
4.
5.
6.
SYNC
Available in 6-lead SOT-23 and 8-lead MSOP packages.
Low power, single-supply operation. This part operates
from a single 2.7 V to 5.5 V supply and typically consumes
0.35 mW at 3 V and 0.7 mW at 5 V, making it ideal for
battery-powered applications.
The on-chip output buffer amplifier allows the output of
the DAC to swing rail-to-rail with a slew rate of 1 V/μs.
Reference derived from the power supply.
High speed serial interface with clock speeds up to
30 MHz. Designed for very low power consumption. The
interface only powers up during a write cycle.
Power-down capability. When powered down, the DAC
typically consumes 50 nA at 3 V and 200 nA at 5 V.
CONTROL
REGISTER
POWER-ON
LOGIC
INPUT
RESET
SCLK DIN
DAC
FUNCTIONAL BLOCK DIAGRAM
12-Bit DAC in an SOT-23
REF (+) REF (–)
© 2005 Analog Devices, Inc. All rights reserved.
12-BIT
V
DAC
CONTROL LOGIC
DD
POWER-DOWN
Figure 1.
GND
OUTPUT
BUFFER
AD5320
AD5320
www.analog.com
REGISTER
NETWORK
V
OUT

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AD5320BRM Summary of contents

Page 1

FEATURES Single 12-bit DAC 6-lead SOT-23 and 8-lead MSOP packages Micropower operation: 140 μ Power-down to 200 2 5.5 V power supply Guaranteed monotonic by design ...

Page 2

AD5320 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Product Highlights ........................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Timing Characteristics ................................................................ 4 Absolute Maximum Ratings............................................................ 5 ESD Caution.................................................................................. 5 Pin ...

Page 3

SPECIFICATIONS kΩ to GND Table 1. Parameter Min 2 STATIC PERFORMANCE Resolution 12 Relative Accuracy Differential Nonlinearity Zero-Code Error Full-Scale Error Gain Error Zero-Code Error Drift Gain ...

Page 4

AD5320 TIMING CHARACTERISTICS 5.5 V, all specifications T DD Table 2. Limit at T Parameter 2 3 22.5 3 ...

Page 5

ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 3. Parameter Ratings V to GND −0 Digital Input Voltage to GND −0 GND −0 OUT ...

Page 6

AD5320 PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS V SYNC 1 6 OUT AD5320 GND SCLK 2 5 TOP VIEW V DIN (Not to Scale) Figure 3. SOT-23 Pin Configuration Table 4. Pin Function Descriptions SOT-23 MSOP Pin No. ...

Page 7

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. A typical INL vs. code plot ...

Page 8

AD5320 TYPICAL PERFORMANCE CHARACTERISTICS 25° –4 INL @ 5V –8 –12 –16 0 800 1600 2400 CODE Figure 5. Typical INL Plot 1.0 0.5 0 –0.5 –1.0 0 1000 2000 CODE Figure ...

Page 9

T DAC LOADED WITH FFF HEX 2 1 DAC LOADED WITH 000 HEX (mA) SOURCE/SINK Figure 11. Source and Sink Current Capability with V 5 DAC LOADED WITH FFF HEX ...

Page 10

AD5320 800 600 400 200 (V) LOGIC Figure 17. Supply Current vs. Logic Input Voltage CLK CH2 V OUT CH1 FULL-SCALE CODE CHANGE 000 HEX – FFF ...

Page 11

THEORY OF OPERATION D/A SECTION The AD5320 DAC is fabricated on a CMOS process. The architecture consists of a string DAC followed by an output buffer amplifier. Because there is no reference input pin, the power supply (V ) acts ...

Page 12

AD5320 SERIAL INTERFACE The AD5320 has a 3-wire serial interface ( SYNC , SCLK, and DIN) that is compatible with SPI®, QSPI TM MICROWIRE interface standards as well as most DSPs. See Figure 2 for a timing diagram of a ...

Page 13

POWER-DOWN MODES The AD5320 contains four separate modes of operation. These modes are software-programmable by setting two bits (DB13 and DB12) in the control register. Table 5 shows how the state of the bits corresponds to the mode of operation ...

Page 14

AD5320 MICROPROCESSOR INTERFACING AD5320 TO ADSP-2101/ADSP-2103 INTERFACE Figure 28 shows a serial interface between the AD5320 and the ADSP-2101/ADSP-2103. The ADSP-2101/ADSP-2103 should be set up to operate in the serial port (SPORT) transmit alter- nate framing mode. The ADSP-2101/ADSP-2103 SPORT ...

Page 15

APPLICATIONS USING REF19X AS A POWER SUPPLY FOR AD5320 Because the supply current required by the AD5320 is extremely low, an alternative option is to use a REF19x voltage reference (REF195 for REF193 for ...

Page 16

AD5320 POWER SUPPLY BYPASSING AND GROUNDING When accuracy is important in a circuit helpful to consider carefully the power supply and ground return layout on the board. The printed circuit board containing the AD5320 should have separate analog ...

Page 17

... Temperature Range AD5320BRM −40°C to +105°C AD5320BRM-REEL −40°C to +105°C AD5320BRM-REEL7 −40°C to +105°C 1 AD5320BRMZ −40°C to +105°C AD5320BRMZ-REEL 1 −40°C to +105°C 1 AD5320BRMZ-REEL7 −40°C to +105°C AD5320BRT-500RL7 −40°C to +105°C AD5320BRT-REEL −40°C to +105°C AD5320BRT-REEL7 − ...

Page 18

AD5320 NOTES Rev Page ...

Page 19

NOTES Rev Page AD5320 ...

Page 20

AD5320 NOTES © 2005 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D00934-0-11/05(C) Rev Page ...

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