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| 型号： | EVAL-AD5245EBZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 14/20页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR AD5245 |
| 标准包装： | 1 |
| 主要目的： | 数字电位器 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | AD5245 |
| 主要属性： | 1 通道，256 位置 |
| 次要属性： | I²C 接口 |
| 已供物品： | 板 |
AD5245
Rev. B | Page 3 of 20
ELECTRICAL CHARACTERISTICS
5 k VERSION
VDD = 5 V ± 10% or 3 V ± 10%, VA = VDD, VB = 0 V, –40°C < TA < +125°C, unless otherwise noted.
Table 1.
Parameter
Symbol
Conditions
Min
Typ1
Max
Unit
DC CHARACTERISTICS—RHEOSTAT MODE
Resistor Differential Nonlinearity2
R-DNL
RWB, VA = no connect
–1.5
±0.1
+1.5
LSB
Resistor Integral Nonlinearity2
R-INL
RWB, VA = no connect
–4
±0.75
+4
LSB
Nominal Resistor Tolerance3
RAB
TA = 25°C
–30
+30
%
Resistance Temperature Coefficient
(RAB/RAB)/T × 106
VAB = VDD, wiper = no connect
45
ppm/°C
Wiper Resistance
RW
50
120
DC CHARACTERISTICS—POTENTIOMETER DIVIDER MODE (Specifications Apply to All VRs)
Differential Nonlinearity4
DNL
–1.5
±0.1
+1.5
LSB
Integral Nonlinearity4
INL
–1.5
±0.6
+1.5
LSB
Voltage Divider Temperature Coefficient
(VW/VW)/T × 106
Code = 0x80
15
ppm/°C
Full-Scale Error
VWFSE
Code = 0xFF
–6
–2.5
0
LSB
Zero-Scale Error
VWZSE
Code = 0x00
0
2
6
LSB
RESISTOR TERMINALS
Voltage Range5
VA, VB, VW
GND
VDD
V
Capacitance A, B6
CA, CB
f = 1 MHz, measured to GND,
code = 0x80
90
pF
Capacitance W6
CW
f = 1 MHz, measured to GND,
code = 0x80
95
pF
Shutdown Supply Current7
IA_SD
VDD = 5.5 V
0.01
1
A
Common-Mode Leakage
ICM
VA = VB = VDD/2
1
nA
DIGITAL INPUTS AND OUTPUTS
Input Logic High
VIH
VDD = 5 V
2.4
V
Input Logic Low
VIL
VDD = 5 V
0.8
V
Input Logic High
VIH
VDD = 3 V
2.1
V
Input Logic Low
VIL
VDD = 3 V
0.6
V
Input Current
IIL
VIN = 0 V or 5 V
±1
A
Input Capacitance6
CIL
5
pF
POWER SUPPLIES
Power Supply Range
VDD RANGE
2.7
5.5
V
Supply Current
IDD
VIH = 5 V or VIL = 0 V
3
8
A
Power Dissipation8
PDISS
VIH = 5 V or VIL = 0 V, VDD = 5 V
44
W
Power Supply Sensitivity
PSS
VDD = +5 V ± 10%, code = midscale
±0.02
±0.05
%/%
DYNAMIC CHARACTERISTICS6, 9
Bandwidth –3 dB
BW_5K
RAB = 5 k, code = 0x80
1.2
MHz
Total Harmonic Distortion
THDW
VA = 1 V rms, VB = 0 V, f = 1 kHz
0.1
%
VW Settling Time
tS
VA = 5 V, VB = 0 V, ±1 LSB error band
1
s
Resistor Noise Voltage Density
eN_WB
RWB = 2.5 k, RS = 0
6
nV/√Hz
1 Typical specifications represent average readings at 25°C and VDD = 5 V.
2 Resistor position nonlinearity error R-INL is the deviation from an ideal value measured between the maximum resistance and the minimum resistance wiper
positions. R-DNL measures the relative step change from ideal between successive tap positions. Parts are guaranteed monotonic.
3 VAB = VDD, wiper (VW) = no connect.
4 INL and DNL are measured at VW with the RDAC configured as a potentiometer divider similar to a voltage output D/A converter. VA = VDD and VB = 0 V.
DNL specification limits of ±1 LSB maximum are guaranteed monotonic operating conditions.
5 Resistor Terminals A, B, and W have no limitations on polarity with respect to each other.
6 Guaranteed by design and not subject to production test.
7 Measured at the A terminal. The A terminal is open circuited in shutdown mode.
8 PDISS is calculated from (IDD × VDD). CMOS logic level inputs result in minimum power dissipation.
9 All dynamic characteristics use VDD = 5 V.
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