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AD5235 Datasheet(PDF) 4 Page - Analog Devices

Part No. AD5235
Description  Nonvolatile Memory, Dual 1024 Position Digital Potentiometers
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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AD5235 Datasheet(HTML) 4 Page - Analog Devices

 
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PRELIMINARY TECHNICAL DATA
Nonvolatile Memory Digital Potentiometers
AD5235
REV PrD 6 NOV, 2000
4
Information contained in this Product Concept data sheet describes a product in the early definition stage. There is no guarantee that the
information contained here will become a final product in its present form. For latest information contact Walt Heinzer/Analog Devices, Santa Clara,
CA. TEL(408)562-7254; FAX (408)727-1550; walt.heinzer@analog.com
Absolute Maximum Rating (TA = +25°C, unless otherwise
noted)
VDD to GND..............................................................-0.3, +7V
VSS to GND ................................................................. 0V, -7V
VDD to VSS ......................................................................... +7V
VA, VB, VW to GND ................................................. VSS, VDD
AX – BX, AX – WX, BX – WX ...................................... ±20mA
Ox to GND...................................................................0V, VDD
Digital Inputs & Output Voltage to GND .................. 0V, +7V
Operating Temperature Range......................... -40°C to +85°C
Maximum Junction Temperature (TJ MAX)...................+150°C
Storage Temperature ..................................... -65°C to +150°C
Lead Temperature (Soldering, 10 sec)..........................+300°C
Thermal Resistance
θ
JA,
TSSOP-16...................................................... 180°C/W
Package Power Dissipation = (TJMAX - TA) / θJA
Ordering Guide
#CHs/
Temp
Package
Package
Model
k Ohm
Range
Description Option
AD5235BRU25
X2/25
-40/+85°C TSSOP-16
RU-16
AD5235BRU250 X2/250
-40/+85°C TSSOP-16
RU-16
The AD5235 contains 16,000 transistors.
Die size: 100 x 105 mil = 10,500 sq. mil
AD5235 PIN CONFIGURATION
CLK
SDI
SDO
GND
VSS
A1
W1
B1
RDY
CS
CS
CS
CS
PR
PR
PR
PR
WP
WP
WP
WP
VDD
A2
W2
B2
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
AD5235 PIN FUNCTION DESCRIPTION
#
Name
Description
1
CLK
Serial Input Register clock pin. Shifts in one bit at
a time on positive clock edges.
2
SDI
Serial Data Input Pin. Shifts in one bit at a time
on positive clock CLK edges.
3
SDO
Serial Data Output Pin. Open Drain Output
requires external pull-up resistor. Commands 9
and 10 activate the SDO output. See Instruction
operation Truth Table. Table 2.
4
GND
Ground pin, logic ground reference
5
VSS
Negative Supply. Connect to zero volts for single
supply applications.
6
A1
A terminal of RDAC1.
7
W1
Wiper terminal of RDAC1,
ADDR(RDAC1) = 0H.
8
B1
B terminal of RDAC1.
9
B2
B terminal of RDAC2.
10
W2
Wiper terminal of RDAC2,
ADDR(RDAC3) = 1H.
11
A2
A terminal of RDAC2.
12
VDD
Positive Power Supply Pin. Should be
≥ the
input-logic HIGH voltage.
13
WP
Write Protect Pin. Prevents any changes to the
present EEMEM contents when active low.
14
PR
Hardware over ride preset pin. Refreshes the
scratch pad register with current contents of the
EEMEM register. Factory default loads midscale
51210.
15
CS
Serial Register chip select active low. Serial
register operation takes place when
CS returns to
logic high.
16
RDY
Ready. Active-high open drain output. Identifies
completion of commands 2, 3, 8, 9, 10.


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