Operating Temperature Range ........................... -40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range ............................ -60°C to +150°C
Lead Temperature (soldering, 10s) ................................. +300°C
Soldering Temperature (reflow) .......................................+260°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
DC Electrical Characteristics
PARAMETER
Resolution
Integral Nonlinearity
Differential Nonlinearity
Dual-Code Matching
End-to-End Resistor Tempco
Ratiometric Resistor Tempco
(V
DD
= +2.7V to +5.25V, V
H
= V
DD
, V
L
= GND, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
DD
= +5.0V,
T
A
= +25°C, unless otherwise noted.) (Note 1)
SYMBOL
N
INL
DNL
TC
R
MAX5487
Full-Scale Error
MAX5488
MAX5489
MAX5487
Zero-Scale Error
MAX5488
MAX5489
DC PERFORMANCE (Variable-Resistor Mode, Figure 1)
Resolution
Integral Nonlinearity (Note 3)
Differential Nonlinearity (Note 3)
DC PERFORMANCE (Resistor Characteristics)
Wiper Resistance (Note 4)
Wiper Capacitance
End-to-End Resistance
R
W
C
W
MAX5487
R
HL
MAX5488
MAX5489
7.5
37.5
75
V
DD
= 5.0V
V
DD
= 3.0V
200
325
50
10
50
100
12.5
62.5
125
kΩ
350
675
Ω
pF
V
DD
= 5.0V
V
DD
= 3.0V
V
DD
= 5.0V
V
DD
= 3.0V
256
±1.5
±3
±1
±1
Taps
LSB
LSB
(Note 2)
(Note 2)
Register A = register B
35
5
3.5
-0.6
-0.3
3.5
-0.6
0.3
6
+1.2
+1.2
6
1.5
1
LSB
LSB
CONDITIONS
MIN
256
±1
±0.5
2
TYP
MAX
UNITS
Taps
LSB
LSB
LSB
ppm/°C
ppm/°C
DC PERFORMANCE (Voltage-Divider Mode, Figure 1)
www.maximintegrated.com
Maxim Integrated │ 2
MAX5487/MAX5488/
MAX5489
DC Electrical Characteristics (continued)
PARAMETER
DIGITAL INPUTS
Input High Voltage (Note 5)
Input Low Voltage
Input Leakage Current
Input Capacitance
AC PERFORMANCE
Crosstalk
V
IH
V
IL
I
IN
C
IN
SYMBOL
Dual, 256-Tap, Nonvolatile, SPI-Interface,
Linear-Taper Digital Potentiometers
(V
DD
= +2.7V to +5.25V, V
H
= V
DD
, V
L
= GND, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
DD
= +5.0V,
T
A
= +25°C, unless otherwise noted.) (Note 1)
CONDITIONS
V
DD
= 3.6V to 5.25V
V
DD
= 2.7V to 3.6V
V
DD
= 2.7V to 5.25V (Note 5)
5.0
f
H
_ = 1kHz, L_ = GND, measurement at W_
(Note 6)
BW
Wiper at midscale
C
W
_ = 10pF
MAX5487
MAX5488
MAX5489
MIN
2.4
0.7 x
V
DD
0.8
±1.0
V
V
µA
pF
TYP
MAX
UNITS
-90
350
90
45
0.02
0.5
0.75
1.5
5
dB
-3dB Bandwidth
kHz
Total Harmonic Distortion
TIMING CHARACTERISTICS (Analog)
Wiper-Settling Time
THD
V
H
_ = 1V
RMS
at 1kHz, L_ = GND,
measurement at W_
Code 0 to 127
(Note 7)
MAX5487
MAX5488
MAX5489
%
t
S
µs
TIMING CHARACTERISTICS (Digital, Figure 2, Note
8)
SCLK Frequency
SCLK Clock Period
SCLK Pulse-Width High
SCLK Pulse-Width Low
CS
Fall to SCLK Rise Setup
SCLK Rise to
CS
Rise Hold
DIN to SCLK Setup
DIN Hold after SCLK
SCLK Rise to
CS
Fall Delay
CS
Rise to SCLK Rise Hold
CS
Pulse-Width High
Write NV Register Busy Time
Read NV Register Access Time
Write Wiper Register to Output Delay
Data Retention
Endurance
t
CP
t
CH
t
CL
t
CSS
t
CSH
t
DS
t
DH
t
CS0
t
CS1
t
CSW
t
BUSY
t
ACC
t
WO
T
A
= +85°C
T
A
= +25°C
T
A
= +85°C
50
200,000
50,000
200
80
80
80
0
50
0
20
80
200
12
1
1
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ms
µs
µs
Years
Stores
NONVOLATILE MEMORY RELIABILITY
www.maximintegrated.com
Maxim Integrated │ 3
MAX5487/MAX5488/
MAX5489
DC Electrical Characteristics (continued)
PARAMETER
POWER SUPPLIES
Power-Supply Voltage
Supply Current
Standby Current
V
DD
I
DD
SYMBOL
Dual, 256-Tap, Nonvolatile, SPI-Interface,
Linear-Taper Digital Potentiometers
(V
DD
= +2.7V to +5.25V, V
H
= V
DD
, V
L
= GND, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
DD
= +5.0V,
T
A
= +25°C, unless otherwise noted.) (Note 1)
CONDITIONS
MIN
2.70
During write cycle only, digital inputs = V
DD
or GND
Digital inputs = V
DD
or GND, T
A
= +25°C
0.5
TYP
MAX
5.25
400
1
UNITS
V
µA
µA
Note 1:
All devices are production tested at TA = +85°C and are guaranteed by design and characterization for -40°C < TA <
+85°C.
Note 2:
DNL and INL are measured with the potentiometer configured as a voltage-divider with H_ = VDD and L_ = 0. The wiper
terminal is unloaded and measured with an ideal voltmeter.
Note 3:
DNL and INL are measured with the potentiometer configured as a variable resistor. H_ is unconnected and L_ = 0. For
VDD = +5V, the wiper terminal is driven with a source current of 400µA for the 10kΩ configuration, 80µA for the 50kΩ
configuration, and 40µA for the 100kΩ configuration. For VDD = +3V, the wiper terminal is driven with a source current of
200µA for the 10kΩ configuration, 40µA for the 50kΩ configuration, and 20µA for the 100kΩ configuration.
Note 4:
The wiper resistance is the worst value measured by injecting the currents given in Note 3 into W_ with L_ = GND. RW =
(VW - VH) / IW.
Note 5:
The device draws higher supply current when the digital inputs are driven with voltages between (VDD - 0.5V) and (GND +
0.5V). See Supply Current vs. Digital Input Voltage in the
Typical Operating Characteristics
section.
Note 6:
Wiper at midscale with a 10pF load.
Note 7:
Wiper-settling time is the worst-case 0-to-50% rise time, measured between tap 0 and tap 127. H_ = VDD, L_ = GND, and
the wiper terminal is unloaded and measured with a 10pF oscilloscope probe (see Tap-to-Tap Switching Transient in the
Typical Operating Characteristics
section).
Note 8:
Digital timing is guaranteed by design and characterization, and is not production tested.
“tensymetry”这个词在《韦伯斯特词典》中没有解释，但在医学界却广为人知。由Tensys Medical Systems公司开发的tensymetry是一种使用生物机械、电气、软件工程的专有组合技术。利用这三种强大的技术，你可在手术室内对病人的心跳血压进行精确、连续、实时和非侵入性测量。 该技术结出的果实就是该公司的T-line Tensymeter产品。该产品线的最新进展是去年...[详细]
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