Monolithic 16-Bit
a
DACPORT
AD669
FUNCTIONAL BLOCK DIAGRAM
FEATURES
Complete 16-Bit D/A Function
On-Chip Output Amplifier (MSB) (LSB)
DB15 DB0
High Stability Buried Zener Reference
7 22
Monolithic BiMOS II Construction
61 LSB Integral Linearity Error
6
CS
16-BIT LATCH 10k
15-Bit Monotonic over Temperature
SPAN/
26
L1 5
BIP OFF
Microprocessor Compatible
10.05k
16-Bit Parallel Input 23 16-BIT LATCH
LDAC
Double-Buffered Latches
10k
Fast 40 ns Write Pulse
27 16-BIT DAC
REF IN
AMP 25
V
OUT
Unipolar or Bipolar Output
Low Glitch: 15 nV-s
28 24
10V REF AGND
REF OUT
AD669
Low THD+N: 0.009%
MIL-STD-883 Compliant Versions Available
1423
V +V +V DGND
EE CC
LL
GENERAL DESCRIPTION PRODUCT HIGHLIGHTS
The AD669 DACPORT is a complete 16-bit monolithic D/A 1. The AD669 is a complete voltage output 16-bit DAC with
converter with an on-board reference and output amplifier. It is voltage reference and digital latches on a single IC chip.
manufactured on Analog Devices BiMOS II process. This pro-
2. The internal buried Zener reference is laser trimmed to
cess allows the fabrication of low power CMOS logic functions
10.000 volts with a 0.2% maximum error. The reference
on the same chip as high precision bipolar linear circuitry. The
voltage is also available for external applications.
AD669 chip includes current switches, decoding logic, an output
3. The AD669 is both dc and ac specified. DC specs include
amplifier, a buried Zener reference and double-buffered latches.
1 LSB INL error and 1 LSB DNL error. AC specs include
The AD669s architecture insures 15-bit monotonicity over
0.009% THD+ N and 83 dB SNR. The ac specifications
temperature. Integral nonlinearity is maintained at 0.003%,
make the AD669 suitable for signal generation applications.
while differential nonlinearity is 0.003% max. The on-chip
4. The double-buffered latches on the AD669 eliminate data
output amplifier provides a voltage output settling time of 10 s
skew errors while allowing simultaneous updating of DACs in
to within 1/2 LSB for a full-scale step.
multi-DAC systems.
Data is loaded into the AD669 in a parallel 16-bit format. The
5. The output range is a pin-programmable unipolar 0 V to
double-buffered latch structure eliminates data skew errors and
+10 V or bipolar 10 V to +10 V output. No external compo-
provides for simultaneous updating of DACs in a multi-DAC
nents are necessary to set the desired output range.
system. Three TTL/LSTTL/5 V CMOS compatible signals con-
trol the latches: CS, L1 and LDAC.
6. The AD669 is available in versions compliant with MIL-
STD-883. Refer to the Analog Devices Military Products
The output range of the AD669 is pin programmable and can
Databook or current AD669/883B data sheet for detailed
be set to provide a unipolar output range of 0 V to +10 V or a
specifications.
bipolar output range of 10 V to +10 V.
The AD669 is available in seven grades: AN and BN versions
are specified from 40C to +85C and are packaged in a 28-pin
plastic DIP. The AR and BR versions are specified for 40C to
+85C operation and are packaged in a 28-pin SOIC. The SQ
version is specified from 55C to +125C and is packaged in a
hermetic 28-pin cerdip package. The AD669 is also available
compliant to MIL-STD-883. Refer to the AD669/883B data
sheet for specifications and test conditions.
DACPORT is a registered trademark of Analog Devices, Inc.
REV. 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
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices. Tel: 617/329-4700 Fax: 617/326-8703(@ T = +258C, V = +15 V, V = 15 V, V = +5 V, unless otherwise noted)
AD669SPECIFICATIONS A CC EE LL
Model AD669AN/AR AD669AQ/SQ AD669BN/BQ/BR
Min Typ Max Min Typ Max Min Typ Max Units
RESOLUTION 16 16 16 Bits
DIGITAL INPUTS (T to T )
MIN MAX
V (Logic 1 ) 2.0 5.5 * * * * Volts
IH
V (Logic 0 ) 0 0.8 * * * * Volts
IL
I (V = 5.5 V) 610 **A
IH IH
I (V = 0 V) 610 **A
IL IL
1
TRANSFER FUNCTION CHARACTERISTICS
Integral Nonlinearity 62 * 61 LSB
T to T 64 * 62 LSB
MIN MAX
Differential Nonlinearity 62 * 61 LSB
T to T 64 * 62 LSB
MIN MAX
Monotonicity Over Temperature 14 14 15 Bits
2, 5
Gain Error 60.15 60.10 60.10 % of FSR
2
Gain Drift (T to T ) 25 15 15 ppm/C
MIN MAX
Unipolar Offset 65 65 62.5 mV
Unipolar Offset Drift (T to T ) 533 ppm/C
MIN MAX
Bipolar Zero Error 615 615 610 mV
Bipolar Zero Error Drift (T to T ) 12 10 5 ppm/C
MIN MAX
REFERENCE INPUT
Input Resistance 7 10 13 ****** k
Bipolar Offset Input Resistance 7 10 13 ****** k
REFERENCE OUTPUT
Voltage 9.98 10.00 10.02****** Volts
Drift 25 15 15 ppm/C
3
External Current 2 4 ** ** mA
Capacitive Load 1000 * * pF
Short Circuit Current 25 * * mA
OUTPUT CHARACTERISTICS
Output Voltage Range
Unipolar Configuration 0 +10 * * * * Volts
Bipolar Configuration 10 +10 * * * * Volts
Output Current 5 * * mA
Capacitive Load 1000 * * pF
Short Circuit Current 25 * * mA
POWER SUPPLIES
Voltage
4
V +13.5 +16.5 * * * * Volts
CC
4
V 13.5 16.5 * * * * Volts
EE
V +4.5 +5.5 * * * * Volts
LL
Current (No Load)
I +12 +18 ** ** mA
CC
I 12 18 ** ** mA
EE
I
LL
@ V , V = 5, 0 V 0.3 2 ** ** mA
IH IL
@ V , V = 2.4, 0.4 V 3 7.5 ** ** mA
IH IL
Power Supply Sensitivity 1 3 * * * * ppm/%
Power Dissipation (Static, No Load) 365 625 * * mW
TEMPERATURE RANGE
Specified Performance (A, B) 40 +85 40 +85 40 +85 C
Specified Performance (S) 55 +125 C
NOTES
1
For 16-bit resolution, 1 LSB = 0.0015% of FSR = 15 ppm of FSR. For 15-bit resolution, 1 LSB = 0.003% of FSR = 30 ppm of FSR. For 14-bit resolution
1 LSB = 0.006% of FSR = 60 ppm of FSR. FSR stands for Full-Scale Range and is 10 V for a 0 V to + 10 V span and 20 V for a 10 V to +10 V span.
2
Gain error and gain drift measured using the internal reference. Gain drift is primarily reference related. See the Using the AD669 with the AD688 Reference section
for further information.
3
External current is defined as the current available in addition to that supplied to REF IN and SPAN/BIPOLAR OFFSET on the AD669.
4
Operation on 12 V supplies is possible using an external reference like the AD586 and reducing the output range. Refer to the Internal/External Reference Use section.
5
Measured with fixed 50 resistors. Eliminating these resistors increases the gain error by 0.25% of FSR (Unipolar mode) or 0.50% of FSR (Bipolar mode). Refer to
the Analog Circuit Connections section.
*Same as AD669AN/AR specification.
Specifications subject to change without notice.
Specifications in boldface are tested on all production units at final electrical test. Results from those tests are used to calculate outgoing quality levels. All min and max specifica-
tions are guaranteed. Those shown in boldface are tested on all production units.
2 REV. A