AD7392 Datasheet, PDF (1/11 Pages) Analog Devices – +3 V, Parallel Input Micropower 10- and 12-Bit DACs

a
+3 V, Parallel Input
Micropower 10- and 12-Bit DACs
FEATURES
Micropower: 100 ␮A
0.1 ␮A Typical Power Shutdown
Single-Supply +2.7 V to +5.5 V Operation
Compact 1.1 mm Height TSSOP-20 Package
AD7392/12-Bit Resolution
AD7393/10-Bit Resolution
0.9 LSB Differential Nonlinearity Error
APPLICATIONS
Automotive 0.5 V to 4.5 V Output Span Voltage
Portable Communications
Digitally Controlled Calibration
PC Peripherals
AD7392/AD7393
FUNCTIONAL BLOCK DIAGRAM
AD7392
VREF
12-BIT
DAC
12
DAC REGISTER
12
DGND CS DB0–DB11 RS
VDD
VOUT
SHDN
AGND
GENERAL DESCRIPTION
The AD7392/AD7393 family of 10- and 12-bit voltage-output
digital-to-analog converters is designed to operate from a single
+3 V supply. Built using a CBCMOS process, these monolithic
DACs offer the user low cost and ease of use in single-supply
+3 V systems. Operation is guaranteed over the supply voltage
range of +2.7 V to +5.5 V, making this device ideal for battery
operated applications.
The full-scale voltage output is determined by the external
reference input voltage applied. The rail-to-rail REF_IN to
DAC_OUT allows for a full-scale voltage set equal to the positive
supply V_DD or any value in between. The voltage outputs are
capable of sourcing 5 mA.
A 12-bit wide data latch loads with a 45 ns write time allowing
interface to the fastest processors without wait states.
1
AD7392
0.8
0.6
0.4
V_DD = +2.7V
V_REF = +2.5V
T_A = 25؇C
0.2
0
؊0.2
؊0.4
؊0.6
؊0.8
؊1
0
512 1024 1536 2048 2560 3072 3584 4096
CODE – Decimal
Figure 1. AD7392 Differential Nonlinearity Error vs. Code
Additionally, an asynchronous RS input sets the output to zero
scale at power on or upon user demand.
Both parts are offered in the same pinout to allow users to select
the amount of resolution appropriate for their applications
without circuit card changes.
The AD7392/AD7393 are specified for operation over the ex-
tended industrial (–40°C to +85°C) temperature range. The
AD7393AR is specified for the –40°C to +125°C automotive
temperature range. AD7392/AD7393s are available in plastic
DIP, and 20-lead SOIC packages. The AD7393ARU is avail-
able for ultracompact applications in a thin 1.1 mm height
TSSOP-20 package.
For serial data input, 8-lead packaged versions, see the AD7390
and AD7391 products.
1
AD7393
0.8
0.6
0.4
V_DD = +2.7V
V_REF = +2.5V
T_A = 25؇C
0.2
0
؊0.2
؊0.4
؊0.6
؊0.8
؊1
0
128 256 384 512 640 768 896 1024
CODE – Decimal
Figure 2. AD7393 Differential Nonlinearity Error vs. Code
REV. A
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use, nor for any infringements of patents or other rights of third parties
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© Analog Devices, Inc., 1999