Preliminary Technical Data
FEATURES
Complete, Quad, 16-Bit, High Accuracy,
Serial Input, Bipolar Voltage Output DAC
AD5764
GENERAL DESCRIPTION
The AD5764 is a quad, 16-bit serial input, voltage output
digital-to analog converter that operates from supply voltages of
±12 V up to ±15 V. Nominal full-scale output range is ±10 V,
provided are integrated output amplifiers, reference buffers,
internal reference, and proprietary power-up/power-down
control circuitry. It also features a digital I/O port that may be
programmed via the serial interface, and an analog temperature
sensor. The part incorporates digital offset and gain adjust
registers per channel.
The AD5764 is a high performance converter that offers
guaranteed monotonicity, integral nonlinearity (INL) of ±1 LSB,
low noise and 10 µs settling time and includes an on-chip 5 V
reference with a reference tempco of 10 ppm/°C max. During
power-up (when the supply voltages are changing), Vout is
clamped to 0V via a low impedance path.
The AD5764 uses a serial interface that operates at clock rates up
to 30 MHz and is compatible with DSP and microcontroller
interface standards. Double buffering allows the simultaneous
updating of all DACs. The input coding is programmable to either
twos complement or straight binary formats. The asynchronous
clear function clears all DAC registers to either bipolar zero or
zero-scale depending on the coding used. The AD5764 is ideal for
both closed-loop servo control and open-loop control
applications. The AD5764 is available in a 32-lead TQFP package,
and offers guaranteed specifications over the −40°C to +85°C
industrial temperature range. See functional block diagram,
Figure 1.
Complete quad 16-bit D/A converter
Programmable output range: ±10 V, ±10.25 V, or ±10.5 V
±1 LSB max INL error, ±1 LSB max DNL error
Low noise : 60 nV/√Hz
Settling time: 10µs max
Integrated reference buffers
Internal reference, 10 ppm/°C
On-chip temp sensor, ±5°C accuracy
Output control during power-up/brownout
Programmable short-circuit protection
Simultaneous updating via LDAC
Asynchronous CLR to zero code
Digital offset and gain adjust
Logic output control pins
DSP/microcontroller compatible serial interface
Temperature range:−40°C to +85°C
iCMOS™
Process Technology
APPLICATIONS
Industrial automation
Closed-loop servo control, process control
Data acquisition systems
Automatic Test Equipment
Automotive test and measurement
High accuracy instrumentation
iCMOS™
Process Technology
For analog systems designers within industrial/instrumentation equipment OEMs who need high performance ICs at higher-voltage levels,
iCMOS
is a
technology platform that enables the development of analog ICs capable of 30V and operating at +/-15V supplies while allowing dramatic reductions in
power consumption and package size, and increased AC and DC performance.
Rev. PrC
21-Oct-04
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: 781.326.8703
© 2004 Analog Devices, Inc. All rights reserved.
AD5764
TABLE OF CONTENTS
Functional Block Diagram .............................................................. 3
Specifications..................................................................................... 4
AC Performance Characteristics ................................................ 6
Timing Characteristics ................................................................ 7
Absolute Maximum Ratings.......................................................... 10
ESD Caution................................................................................ 10
Pin Configuration and Function Descriptions........................... 11
Terminology .................................................................................... 13
Typical Performance Characteristics ........
Error! Bookmark not
defined.
General Description ....................................................................... 15
dac architecture........................................................................... 16
Reference Buffers........................................................................ 16
Serial interface ............................................................................ 16
Simultaneous Updating Via
LDAC
.......................................... 17
transfer function ......................................................................... 18
Preliminary Technical Data
Asynchronous Clear (CLR)....................................................... 18
Function Register ....................................................................... 20
DAta register ............................................................................... 21
Coarse gain register.................................................................... 21
Fine gain register ........................................................................ 21
offset register............................................................................... 22
AD5764 Features ............................................................................ 23
Analog Output Control ............................................................. 23
Digital Offset and Gain Control............................................... 23
Programmable Short-Circuit protection................................. 23
Digital I/O Port........................................................................... 23
Temperature Sensor ................................................................... 23
Local ground offset adjust......................................................... 23
Outline Dimensions ....................................................................... 24
Ordering Guide .......................................................................... 28
REVISION HISTORY
Revision PrC 21-Oct-04: Preliminary Version
Rev. PrC 21-Oct-04| Page 2 of 28
AD5764
SPECIFICATIONS
Preliminary Technical Data
AV
DD
= +11.4 V to +15.75 V, AV
SS
= −11.4 V to −15.75 V, AGND = DGND = REFGND = PGND=0 V; REFAB = REFCD= 5 V Ext;
DV
CC
= 2.7 V to 5.5 V, R
LOAD
= 10 kΩ, C
L
= 200 pF. All specifications T
MIN
to T
MAX
, unless otherwise noted.
Table 1.
Parameter
ACCURACY
Resolution
Relative Accuracy (INL)
Differential Nonlinearity
Bipolar Zero Error
A Grade
1
16
±4
±1
±1
B Grade
1
16
±2
±1
±1
C Grade
1
16
±1
±1
±1
Unit
Bits
LSB max
LSB max
mV max
Test Conditions/Comments
Guaranteed monotonic
At 25°C. Error at other
temperatures
obtained using bipolar zero TC.
At 25°C. Error at other
temperatures
obtained using zero code TC.
At 25°C. Error at other
temperatures
obtained using gain TC.
Bipolar Zero TC
Zero Code Error
±2
±1
±2
±1
±2
±1
ppm FSR/°C max
mV max
Zero Code TC
Gain Error
±2
±0.02
±2
±0.02
±2
±0.02
ppm FSR/°C max
% FSR max
Gain TC
DC Crosstalk
2
REFERENCEINPUT/OUTPUT
Reference Input
2
Reference Input Voltage
DC Input Impedance
Input Current
Reference Range
Reference Output
Output Voltage
Reference TC
Output Noise(0.1 Hz to 10 Hz)
Noise Spectral Density
OUTPUT CHARACTERISTICS
2
Output Voltage Range
3
Output Voltage TC
Output Voltage Drift V
S
Time
Short Circuit Current
Load Current
Capacitive Load Stability
R
L
= ∞
R
L
= 10 kΩ
DC Output Impedance
2
0.5
2
0.5
2
0.5
ppm FSR/°C max
LSB max
5
1
±10
1/5
4.999/5.001
±10
±3
TBD
TBD
±10
±13
±2
±TBD
10
±1
200
TBD
0.3
5
1
±10
1/5
4.999/5.001
±10
±3
TBD
TBD
±10
±13
±2
±TBD
10
±1
200
TBD
0.3
5
1
±10
1/5
4.999/5.001
±10
±3
TBD
TBD
±10
±13
±2
±TBD
10
±1
200
TBD
0.3
V nom
MΩ min
µA max
V min/max
V min/max
ppm/°C max
Ppm/°C typ
µV p-p typ
nV/√Hz typ
V min/max
V min/max
ppm FSR/°C max
ppm FSR/1000 Hours
typ
mA max
mA max
pF max
pF max
Ω max
±1% for specified performance
Typically 100 MΩ
Typically ±30 nA
At 25°C
AV
DD
/AV
SS
= ±11.4 V
AV
DD
/AV
SS
= ±14.75 V
RI
SCC
= 6 KΩ , See Figure ???
1
2
Temperature range −40°C to +85°C; typical at +25°C. Device functionality is guaranteed to +105°C with degraded performance.
Guaranteed by characterization. Not production tested.
3
Output amplifier headroom requirement is 1.4 V min.
Rev. PrC 21-Oct-04| Page 4 of 28
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