参数资料
型号: MAX5422ETA
厂商: MAXIM INTEGRATED PRODUCTS INC
元件分类: 数字电位计
英文描述: 256-Tap, Nonvolatile, I2C-Interface, Digital Potentiometers
中文描述: 50K DIGITAL POTENTIOMETER, 3-WIRE SERIAL CONTROL INTERFACE, 256 POSITIONS, DSO8
封装: 3 X 3 MM, 0.8 MM HEIGHT, MO229/WEEC, TDFN-8
文件页数: 4/11页
文件大小: 614K
代理商: MAX5422ETA
DNL vs. TAP POSITION
M
TAP POSITION
D
224
192
128
160
64
96
32
-0.20
-0.15
-0.10
-0.05
0
0.05
0.10
0.15
0.20
0.25
-0.25
0
256
VOLTAGE-DIVIDER MODE
INL vs. TAP POSITION
M
TAP POSITION
I
224
192
128
160
64
96
32
-0.20
-0.15
-0.10
-0.05
0
0.05
0.10
0.15
0.20
0.25
-0.25
0
256
VOLTAGE-DIVIDER MODE
R
)
100
200
300
400
500
600
700
0
WIPER RESISTANCE vs. TAP POSITION
M
TAP POSITION
224
192
128
160
64
96
32
0
256
V
DD
= 2.7V
I
SRC
= 50
μ
A
Typical Operating Characteristics
(V
DD
= 5.0V, T
A
= +25
°
C, unless otherwise noted.)
M
256-Tap, Nonvolatile, SPI-Interface,
Digital Potentiometers
4
_______________________________________________________________________________________
TIMING CHARACTERISTICS (continued)
(V
DD
= +2.7V to +5.25V, H = V
DD
, L = GND, T
A
= -40
°
C to +85
°
C. Typical values are at V
DD
= +5.0V, T
A
= +25
°
C, unless otherwise
noted. See Figure 1.) (Note 7)
PARAMETER
SYMBOL
t
DH
t
CS0
t
CS1
t
CSW
t
BUSY
CONDITIONS
MIN
0
20
80
200
TYP
MAX
UNITS
ns
ns
ns
ns
ms
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
12
Note 1:
The DNL and INL are measured with the potentiometer configured as a voltage-divider with H = V
DD
and L = GND. The
wiper terminal is unloaded and measured with a high-input-impedance voltmeter.
Note 2:
The DNL and INL are measured with the potentiometer configured as a variable resistor. H is unconnected and L = GND.
For the 5V condition, the wiper terminal is driven with a source current of 80μA for the 50k
configuration, 40μA for the
100k
configuration, and 20μA for the 200k
configuration. For the 3V condition, the wiper terminal is driven with a source
current of 40μA for the 50k
configuration, 20μA for the 100k
, and 10μA for the 200k
configuration.
Note 3:
The wiper resistance is measured using the source currents given in Note 2. For operation to V
DD
= 2.7V, see Maximum
Wiper Resistance vs. Temperature in the
Typical Operating Characteristics
.
Note 4:
The device draws higher supply current when the digital inputs are driven with voltages between (V
DD
- 0.5V) and (GND +
0.5V). See Supply Current vs. Digital Input Voltage in the
Typical Operating Characteristics
.
Note 5:
Wiper at midscale with a 10pF load (DC measurement). L = GND; an AC source is applied to H; and the W output is mea-
sured. A 3dB bandwidth occurs when the AC W/H value is 3dB lower than the DC W/H value.
Note 6:
The programming current operates only during power-up and NV writes.
Note 7:
Digital timing is guaranteed by design and characterization, and is not production tested.
Note 8:
Wiper-settling time is the worst-case 0% to 50% rise-time measured between consecutive wiper positions. H = V
DD
, L =
GND, and the wiper terminal is unloaded and measured with a 10pF oscilloscope probe.
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