鈥?/div>
Digital Control of Gain & Offset
Two鈥檚 Complement
Dual, 12-Bit DACs
AD5329
data bits clocked into the register will be transferred to the internal
DAC register when the strobe input is returned to logic high.
The output transfer equation is:
V
OUT
= [(D-2048) / 4096 * V
DACREF
] + V
BZ
Where D is the 12-bit decimal data, and V
OUT
, V
DACREF
, V
BZ
are with
respect to ground.
The AD5329 is available in the compact 1.1mm thin
碌SOIC-10
package. All parts are guaranteed to operate over the industrial
temperature range of 0擄C to +70擄C.
PIN CONFIGURATION
V
DD
1
SDA 2
NC 3
V
OUTB
4
V
OUTA
5
10 GND
9 SCLK
8 FSYNC
7 NC
6 V
BZ
GENERAL DESCRIPTION
The AD5329 is a serial-input, dual 12-bit digital-to-analog converter
that accepts two鈥檚 complement digital coding. An internal voltage
reference generates a stable 2V DACREF. The buffered DACREF
output generates the system bipolar ground reference at pin V
BZ
. The
bipolar DAC output swing programs over a 4V
PP
range. The device is
specified for operation from +5 volts 鹵10%.
Data is loaded MSB first on the positive clock edge (SCLK) when the
frame synch (FSYNC) input is active low. The serial clock input word
is 16-bits with the MSB position containing an address bit. The last 12
Model
AD5329KRM-REEL7
ORDERING GUIDE
RES
Temp
Package
Package
(bits)
Range
Description Option
12
0/+70擄C
碌SOIC-10
RM-10
FUNCTIONAL BLOCK DIAGRAM
V
BZ
(V
REF
)
V
DD
X2
V
BZ
+ 2V
V
OUTA
AD5329
+2V
+
V
DACREF
-
X2
V
BZ
- 2V
V
BZ
+ 2V
V
OUTB
V
BZ
- 2V
GND
DECODER SW
DRIVER A
12
DECODER SW
DRIVER B
12
FSYNC
EN
ADDR
DECODE
SCLK
A0
DAC A
REGISTER
DAC B
REGISTER
12
SDI
16-Bit
SERIAL INPUT REGISTER
D11 ...............D0
Power On
Reset
REV PrC, 20 DEC 99
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 which may result from its use. No
license is granted by implication or otherwise under any patent or patent rights of Analog
Devices.
One Technology Way, P.O. Box 9106,
Norwood, MA 02062-9106 U
.
S
.
A
.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax:617/326-8703
漏Analog
Devices, Inc., 1998
1
2
3
4
