3 V, Parallel Input
Micropower 10-/12-Bit DACs
AD7392/AD7393
Micropower: 100 μA
0.1 μA typical power shutdown
Single-supply 2.7 V to 5.5 V operation
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
FUNCTIONAL BLOCK DIAGRAM
AD7392
VDD
12-BIT
DAC
VREF
VOUT
SHDN
12
DAC REGISTER
AGND
12
DGND CS
D0 TO D11
RS
01121-001
FEATURES
Figure 1.
GENERAL DESCRIPTION
The AD7392/AD7393 comprise a set of pin-compatible
10-/12-bit voltage output, digital-to-analog converters. The
parts are designed to operate from a single 3 V supply. Built
using a CBCMOS process, these monolithic DACs offer 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 REFIN to DACOUT
allows a full-scale voltage equal to the positive supply VDD or
any value in between. The voltage outputs are capable of sourcing 5 mA.
Both parts are offered with similar pinouts, which allows users
to select the amount of resolution appropriate for their applications without changing the circuit card.
The AD7392/AD7393 are specified for operation over the
extended industrial temperature range of −40°C to +85°C.
The AD7393AR is specified for the automotive temperature
range of −40°C to +125°C. The AD7392/AD7393 are available
in 20-lead PDIP and 20-lead SOIC packages.
For serial data input, 8-lead packaged versions, see the AD7390
and AD7391.
A data latch load of 12 bits with a 45 ns write time eliminates
wait states when interfacing to the fastest processors. Additionally, an asynchronous RS input sets the output to a zero scale at
power-on or upon user demand.
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 ©1996–2007 Analog Devices, Inc. All rights reserved.
AD7392/AD7393
SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
At VREF = 2.5 V, −40°C < TA < +85°C, unless otherwise noted.
Table 1. AD7392
Parameter
STATIC PERFORMANCE
Resolution1
Relative Accuracy2
Symbol
Conditions
3 V ± 10%
5 V ± 10%
Unit
TA = +25°C
TA = −40°C, +85°C
TA = +25°C, monotonic
Monotonic
Data = 0x000, TA = +25°C, +85°C
Data = 0x000, TA = −40°C
TA = +25°C, +85°C, data = 0xFFF
TA = −40°C, data = 0xFFF
TCVFS
12
±1.8
±3
±0.9
±1
4.0
8.0
±8
±20
28
12
±1.8
±3
±0.9
±1
4.0
8.0
±8
±20
28
Bits
LSB max
LSB max
LSB max
LSB max
mV max
mV max
mV max
mV max
ppm/°C typ
VREF
RREF
CREF
0/VDD
2.5
5
0/VDD
2.5
5
V min/max
MΩ typ4
pF typ
1
3
100
1
3
100
mA typ
mA typ
pF typ
VIL
VIH
IIL
CIL
0.5
VDD − 0.6
10
10
0.8
VDD − 0.6
10
10
V max
V min
μA max
pF max
tCS
tDS
tDH
tRS
45
30
20
40
45
15
5
30
ns min
ns min
ns min
ns min
Data = 0x000 to 0xFFF to 0x000
To ±0.1% of full scale
0.05
70
Code 0x7FF to Code 0x800 to Code 0x7FF
65
15
−63
0.05
60
80
65
15
−63
V/μs typ
μs typ
μs typ
nV/s typ
nV/s typ
dB typ
2.7/5.5
55/100
0.1/1.5
300
0.006
2.7/5.5
55/100
0.1/1.5
500
0.006
V min/max
μA typ/max
μA typ/max
μW max
%/% max
N
INL
Differential Nonlinearity2
DNL
Zero-Scale Error
VZSE
Full-Scale Voltage Error
VFSE
Full-Scale Temperature Coefficient3
REFERENCE INPUT
VREF Range
Input Resistance
Input Capacitance3
ANALOG OUTPUT
Current (Source)
Output Current (Sink)
Capacitive Load3
LOGIC INPUTS
Logic Input Low Voltage
Logic Input High Voltage
Input Leakage Current
Input Capacitance3
INTERFACE TIMING3, 5
Chip Select Write Width
Data Setup
Data Hold
Reset Pulse Width
AC CHARACTERISTICS
Output Slew Rate
Settling Time6
Shutdown Recovery Time
DAC Glitch
Digital Feedthrough
Feedthrough
SUPPLY CHARACTERISTICS
Power Supply Range
Positive Supply Current
Shutdown Supply Current
Power Dissipation
Power Supply Sensitivity
IOUT
IOUT
CL
SR
tS
tSDR
Data = 0x800, ∆ VOUT = 5 LSB
Data = 0x800, ∆ VOUT = 5 LSB
No oscillation
VOUT/VREF
VREF = 1.5 V dc + 1 V p-p, data = 0x000,
f = 100 kHz
VDD RANGE
IDD
IDD-SD
PDISS
PSS
DNL < ±1 LSB
VIL = 0 V, no load
SHDN = 0, VIL = 0 V, no load
VIL = 0 V, no load
Δ VDD = ±5%
1
One LSB = VREF/4096 V for the 12-bit AD7392.
The first two codes (0x000, 0x001) are excluded from the linearity error measurement.
3
These parameters are guaranteed by design and not subject to production testing.
4
Typicals represent average readings measured at +25°C.
5
All input control signals are specified with tR = tF = 2 ns (10% to 90% of 13 V) and timed from a voltage level of 1.6 V.
6
The settling time specification does not apply for negative going transitions within the last 3 LSBs of ground.
2
Rev. C | Page 3 of 20
