DS1804-050+ [MAXIM]
Digital Potentiometer, 1 Func, 50000ohm, Increment/decrement Control Interface, 100 Positions, CMOS, 0.300 INCH, ROHS COMPLIANT, DIP-8;
| 型号： | DS1804-050+ |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Digital Potentiometer, 1 Func, 50000ohm, Increment/decrement Control Interface, 100 Positions, CMOS, 0.300 INCH, ROHS COMPLIANT, DIP-8 转换器 电阻器 |
| 文件： | 总10页 (文件大小：177K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-5876; Rev 6/11
DS1804
Nonvolatile Trimmer Potentiometer
FEATURES
PIN ASSIGNMENT
. Single 100-Position Taper Potentiometer
. Nonvolatile (NV) On-Demand Wiper
Storage
. Operates from 3V or 5V Supplies
. Up/Down, Increment-Controlled Interface
. Available in 8-Pin (300 mils) DIP, 8-Pin
(150 mils) SO, and 8-Pin (118 mils) µSOP
. -40°C to +85°C Operating Temperature
Range
INC
U/D
H
1
2
3
4
8
7
6
5
VCC
CS
L
GND
W
DIP (300 mils)
SO (150 mils)
μSOP (118 mils)
. Standard Resistance Values:
– DS1804-010: 10kΩ
– DS1804-050: 50kΩ
– DS1804-100: 100kΩ
PIN DESCRIPTION
H
L
W
VCC
CS
- High-Terminal of Potentiometer
- Low-Terminal of Potentiometer
- Wiper of Potentiometer
- 3V or 5V Power Supply
- Chip Select
U/
D
- Up/Down Control
- Increment/Decrement Wiper Control
- Ground
INC
GND
DESCRIPTION
The DS1804 NV trimmer potentiometer is a nonvolatile digital potentiometer that has 100 positions. The
device provides an ideal method for low-cost trimming applications using a CPU or manual control input
with minimal external circuitry. Wiper position of the DS1804 can be stored in EEPROM memory on
demand. The device’s wiper position is manipulated by a three-terminal port that provides an increment/
decrement counter controlled interface. This port consists of the control inputs
,
, and U/ . The
D
CS INC
DS1804 is available in three resistor grades, which include a 10kΩ, 50kΩ, and 100kΩ. The device is
provided in an industrial temperature grade. Additionally, the DS1804 will operate from 3V or 5V
supplies and is ideal for portable application requirements. Three packaging options are available and
include the 8-pin (300 mils) DIP, 8-pin (150 mils) SO, and 8-pin (118 mils) μSOP.
1 of 10
DS1804
OPERATION
The DS1804 is a single nonvolatile potentiometer. The device has a total of 100 tap-points including the
L- and H- terminals. A total of 99 resistive segments exist between the L- and H- terminals. These tap-
points are accessible to the W-terminal, whose position is controlled via a three-terminal control port. A
block diagram of the DS1804 is shown in Figure 1.
The three-terminal port of the DS1804 provides an increment/decrement interface which is activated via a
chip-select input. This interface consists of the input signals
,
, and U/
D
. These input signals
control a 7-bit up/down counter. The output of the 7-bit up/down counter controls a 1 of 100 decoder to
select wiper position. Additionally, this interface provides for a wiper storage operation using the and
CS INC
CS
input control pins. The timing diagram for the three-terminal interface control is shown in Figure 2.
INC
PIN DESCRIPTIONS
VCC - Power Supply. The DS1804 will support supply voltages ranging from +2.7V to +5.5V.
GND - Ground.
H - High-Terminal Potentiometer. This is the high terminal of the potentiometer. It is not required that
this terminal be connected to a potential greater than the L-terminal. Voltage applied to the H-terminal
cannot exceed the power-supply voltage, VCC, or go below ground.
L - Low-Terminal Potentiometer. This is the low terminal of the potentiometer. It is not required that this
terminal be connected to a potential less than the H-terminal. Voltage applied to the L-terminal cannot
exceed the power-supply voltage, VCC, or go below ground.
W - Wiper of the Potentiometer. This pin is the wiper of the potentiometer. Its position on the resistor
array is controlled by the three-terminal control port. Voltage applied to the wiper cannot exceed the
power-supply voltage, VCC, or go below ground.
- Chip Select. The
input is used to activate the control port of the DS1804. This input is active
CS
CS
low. When in a high-state, activity on the
position.
D
and U/ port pins will not affect or change wiper
INC
- Wiper Movement Control. This input provides for wiper position changes when the
pin is low.
CS
INC
Wiper position changes of the W-terminal will occur one position per high-to-low transition of this input
signal. Position changes will not occur if the pin is in a high state.
CS
U/
D
- Up/Down Control. This input sets the direction of wiper movement. When in a high state and
CS
is low, any high-to-low transition on
will cause a one position movement of the wiper towards the
INC
H-terminal. When in a low state and
is low, any high-to-low transitions on
will cause the
INC
CS
position of the wiper to move towards the L-terminal.
2 of 10
DS1804
DS1804 BLOCK DIAGRAM Figure 1
POWER-UP/POWER-DOWN CONDITIONS
On power-up, the DS1804 will load the value of EEPROM memory into the wiper position register (or 1
of 100 decoder). The value of this register can then be set to another wiper position if desired, by using
the three-terminal control port. On power-up, wiper position will be loaded within a maximum time
period of 500µs once the power-supply is stable. Additionally, the three-terminal interface port will be
active after 50ms.
On power-down, the wiper position register data will be lost. On the next device power-up, the value of
EEPROM memory will be loaded into the wiper position register.
On shipment from the factory, Maxim Integrated Products does not guarantee a specified EEPROM
memory value. This value should be set by the customer as needed.
NONVOLATILE WIPER STORAGE
Wiper position of the DS1804 can be stored using the
and
inputs. Storage of the wiper position
CS
INC
takes place whenever the
input transitions from low-to-high while the
is high. Once this
INC
CS
condition has occurred the value of the current wiper position will be written to EEPROM memory.
The DS1804 is specified to accept 50,000 writes to EEPROM over 0°C to 70ºC before a wear-out
condition. After wear-out the DS1804 will still function and wiper position can be changed during
powered conditions using the three-terminal control port. However, on power-up the wiper-position will
be indeterminate.
ONE-TIME PROGRAMMABILITY (OTP)
The DS1804 can be easily used as an OTP device. The user of the DS1804 can trim the desired value of
the wiper position and set this position for storage as described above. Any activity through the three-
terminal port can then be prevented by connecting the
input pin to VCC. Also, an OTP application
CS
does not adversely affect the number of times EEPROM is written, since EEPROM will only be loaded
and not written during a power-up or power-down condition.
On power-up, the DS1804 will load the current value of EEPROM memory into the wiper position
register.
3 of 10
DS1804
ABSOLUTE MAXIMUM RATINGS
Voltage on Any Pin Relative to Ground
Operating Temperature Range
Storage Temperature Range
Lead Temperature (soldering, 10s)
Soldering Temperature (reflow)
-1.0V to +6.0V
-40°C to +85°C
-55°C to +125°C
+300°C
+260°C
This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation
sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect
reliability.
RECOMMENDED DC OPERATING CONDITIONS
(TA = -40°C to +85°C, unless otherwise noted.)
PARAMETER
SYMBOL
MIN
+2.7
2.0
TYP
MAX
5.5
UNITS NOTES
Supply Voltage
VCC
V
V
1
Input Logic 1
Input Logic 0
Resistor Inputs
VIH
VCC + 0.3
1, 2
+0.8
+0.6
VIL
-0.3
V
V
1, 15
1, 3
L, H, W
VGND - 0.2
VCC + 0.2
DC ELECTRICAL CHARACTERISTICS
(VCC = 2.7V to 5.5V, TA = -40°C to +85°C, unless otherwise noted.)
PARAMETER
SYMBOL
MIN
TYP
MAX
400
+1
UNITS NOTES
Supply Current
ICC
ILI
µA
µA
Ω
4
Input Leakage
Wiper Resistance
Wiper Current
-1
RW
IW
400
1000
1
mA
Standby Current:
10
20
µA
µA
ISTBY
48
5
3V
5V
Wiper Load Time
Power-Up Time
tWLT
tPU
500
50
µs
6
ms
14
4 of 10
DS1804
ANALOG RESISTOR CHARACTERISTICS
(VCC = 2.7V to 5.5V, TA = -40°C to +85°C, unless otherwise noted.)
PARAMETER
End-to-End Resistor Tolerance
Absolute Linearity
SYMBOL MIN
TYP
MAX
UNITS NOTES
-20
%
LSB
8
9
+20
±0.6
Relative Linearity
±0.25
LSB
10
11
-3dB Cutoff Frequency
Temperature Coefficient
fCUTOFF
MHz
ppm/°C
750
CAPACITANCE
(VCC = 2.7V to 5.5V, TA = +25°C, unless otherwise noted.)
PARAMETER
Input Capacitance
Output Capacitance
SYMBOL
MIN
TYP
MAX
UNITS NOTES
CIN
5
7
pF
pF
12
12
COUT
AC ELECTRICAL CHARACTERISTICS
(VCC = 2.7V to 5.5V, TA = -40°C to +85°C, unless otherwise noted.)
PARAMETER
Setup
INC
SYMBOL
MIN
TYP
MAX
UNITS NOTES
tCI
50
ns
ns
ns
ns
ns
ns
ns
µs
ns
ms
13
13
to
CS
tDI
100
50
U/
D
to
Setup
INC
tIL
13
Low Period
High Period
INC
tIH
100
500
100
13
INC
INC
inactive to
Inactive
CS
tIC
13
tCPH
tIW
13
Deselect Time
CS
200
500
13
Wiper Change to
Low
INC
tR, tF
tIK
13
Rise and Fall Times
INC
INC
50
16
Low to
Inactive
CS
Wiper Storage Time
tWST
10
13, 17
5 of 10
DS1804
NOTES:
1) All voltages are referenced to ground.
2) Valid for VCC = 5V only.
3) Resistor input voltages cannot go below ground or exceed VCC by the amounts as shown in the table.
4) Maximum current specifications are based on the clock rate of
represents the current required when changing the wiper position.
input. This specification
INC
5) Standby current levels apply when all inputs are driven to appropriate supply levels.
VCC.
,
, U/ =
D
CS INC
6) Wiper load time is specified as the time required for the DS1804 to load the wiper position with the
contents of nonvolatile memory once VCC has reached a stable operating voltage equal to or greater
than 2.7V.
7) The DS1804 is available in three resistor values. These include the DS1804-010, 10kΩ; the DS1804-
050, 50kΩ; and the DS1804-100, 100kΩ.
8) Valid at TA = +25°C only.
9) Absolute linearity is used to compare measured wiper voltage versus expected wiper voltage as
determined by wiper position. The DS1804 is specified to provide an absolute linearity of ±0.60 LSB.
10) Relative linearity is used to determined the change in voltage between successive tap positions. The
DS1804 is specified to provide a relative linearity specification of ±0.25 LSB.
11) -3dB cutoff frequency characteristics for the DS1804 depend on potentiometer total resistance.
DS1804-010, 1MHz; DS1804-050, 200kHz; and DS1804-100, 100kHz.
12) Capacitance values apply at TA = +25°C.
13) See Figure 2.
14) Power-up time is specified as the time required before the three-terminal control becomes active after
a stable power supply level has been reached.
15) At VCC = 2.7V, VIL = 0.8V.
16) The
low to
inactive is specified to be 50ns minimum. This is the transition condition which
CS
INC
allows the DS1804 three-terminal port to become inactive without writing the EEPROM memory of
the part.
17) Wiper Storage Time, tWST, is the time require for the DS1804 to write EEPROM memory for storage
of a new wiper position. The maximum time required to accomplish this task is specified at 10ms.
6 of 10
DS1804
THREE-TERMINAL INTERFACE TIMING DIAGRAM Figure 2
ORDERING INFORMATION
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PART
DS1804-010+
DS1804-050+
DS1804-100+
DS1804Z-010+
DS1804Z-050+
DS1804Z-100+
DS1804U-010+
DS1804U-050+
DS1804U-100+
PIN-PACKAGE
8 DIP (300 mils)
8 DIP (300 mils)
8 DIP (300 mils)
8 SO (150 mils)
8 SO (150 mils)
8 SO (150 mils)
VERSION (kΩ)
10
50
100
10
50
100
10
8 µSOP (118 mils)
8 µSOP (118 mils)
8 µSOP (118 mils)
50
100
+Denotes a lead(Pb)/RoHS-compliant package.
7 of 10
DS1804
BRANDING INFORMATION Figure 3
Bottom Brand
cccccc
Top Brand
DS1804-nnn
8-pin
DIP
yywwrv
###xx
DS1804m
8-pin
yywwrv
SOIC
cccccc
###xx
1804
rvnnn
yyww
###xx
8-pin
uSOP
DS1804 Brand Codes
Description
Values
Code
010
050
100
10k ohm
50k ohm
100k ohm
nnn
Pot Size (DIP/uSOP)
Pot Size (SOIC)
m
X
L
C
10k ohm
50k ohm
100k ohm
yyww
rv
Date Code. It identifies the year eg. 0035 is the 35th work week
and work week the device was
assembled
of 2000
Die Revision
Generally this is a letter followed
by a number (eg. B2)
Lot Code
###xx
Country of Assembly
cccccc
8 of 10
DS1804
PACKAGE INFORMATION
For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages.
Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a
different suffix character, but the drawing pertains to the package regardless of RoHS status.
PACKAGE TYPE
PACKAGE CODE
OUTLINE NO.
21-0043
LAND PATTERN NO.
8 DIP
8 SO
P8+2
S8+2
U8+3
—
21-0041
90-0096
90-0092
21-0036
8 µSOP
9 of 10
DS1804
REVISION HISTORY
REVISION
PAGES
CHANGED
DESCRIPTION
DATE
Removed the flip chip package option
1, 7
Updated the soldering temperature information and added lead
temperature information in the Absolute Maximum Ratings section
Changed VIH(MAX) from VCC + 0.5V to VCC + 0.3V, changed VIL(MIN)
from -0.5V to -0.3V, changed the resistor inputs min from GND - 0.5V to
4
4
6/11
VGND - 0.2V and max from VCC + 0.5V to VCC + 0.2V in the
Recommended DC Operating Conditions table
Updated the Ordering Information table to include lead-free options
Added the Package Information table
7
9
10 of 10
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim
reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2011 Maxim Integrated Products
Maxim is a registered trademark of Maxim Integrated Products, Inc.
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