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PDF AD8556 Data sheet ( Hoja de datos )
| Número de pieza | AD8556 | |
| Descripción | Digitally Programmable Sensor Signal Amplifier | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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Data Sheet
Digitally Programmable Sensor Signal
Amplifier with EMI Filters
AD8556
FEATURES
EMI filters at input pins
Specified from −40°C to +140°C
Low offset voltage: 10 µV maximum
Low input offset voltage drift:
65 nV/°C maximum
High CMRR: 94 dB minimum
Digitally programmable gain and output offset voltage
Programmable output clamp voltage
Open and short wire fault detection
Low-pass filtering
Single-wire serial interface
Stable with any capacitive load
SOIC_N and LFCSP_WQ packages
4.5 V to 5.5 V operation
APPLICATIONS
Pressure and position sensors
Precision current sensing
Strain gages
FUNCTIONAL BLOCK DIAGRAM
DIGIN
VCLAMP
VDD
VPOS
VNEG
LOGIC
VDD
DAC
EMI
FILTER
1 +IN
2 A5 OUT 3
–IN
VSS
EMI
FILTER
1 +IN
2 A1 OUT
3
–IN
R2
VSS
R5
P2
P4
R7
EMI
FILTER
EMI
FILTER
R3
VDD
1 +IN
2 A2 OUT
3
–IN
R1
P1
R4
VDD
1 +IN
2 A3 OUT
3
–IN
VSS
R5
P3
RF
EMI
FILTER
VDD
1 +IN
2 A4 OUT
3
–IN
VSS
VSS
AD8556
VSS
FILT/DIGOUT
Figure 1.
VOUT
Rev. B
Document Feedback
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rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2005–2015 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
AD8556
Data Sheet
SPECIFICATIONS
ELECTRICAL SPECIFICATIONS
VDD = 5.0 V, VSS = 0.0 V, VCM = 2.5 V, VO = 2.5 V, −40°C ≤ TA ≤ +140°C, unless otherwise specified.
Table 1.
Parameter
INPUT STAGE
Input Offset Voltage
Input Offset Voltage Drift
Input Bias Current
Input Offset Current
Input Voltage Range
Common-Mode Rejection Ratio
Linearity
Differential Gain Accuracy
Differential Gain Temperature Coefficient
RF
RF Temperature Coefficient
DAC
Accuracy
Ratiometricity
Output Offset
Temperature Coefficient
VCLAMP
Input Bias Current
Input Voltage Range
OUTPUT BUFFER STAGE
Buffer Offset
Short-Circuit Current
Output Voltage, Low
Output Voltage, High
POWER SUPPLY
Supply Current
Power Supply Rejection Ratio
Supply Voltage Required During Programming
Symbol Conditions
VOS
TCVOS
IB
IOS
−40°C ≤ TA ≤ +125°C
−40°C ≤ TA ≤ +140°C
TA = 25°C
−40°C ≤ TA ≤ +125°C
−40°C ≤ TA ≤ +140°C
TA = 25°C
−40°C ≤ TA ≤ +125°C
−40°C ≤ TA ≤ +140°C
CMRR
VCM = 2.1 V to 2.9 V, AV = 70
VCM = 2.1 V to 2.9 V, AV = 1280
VO = 0.2 V to 3.4 V
VO = 0.2 V to 4.8 V
Second stage gain = 17.5 to 100
Second stage gain = 140 to 200
Second stage gain = 17.5 to 100
Second stage gain = 140 to 200
AV = 70, offset codes = 8 to 248
AV = 70, offset codes = 8 to 248
AV = 70, offset codes = 8 to 248
−40°C ≤ TA ≤ +125°C
−40°C ≤ TA ≤ +140°C
TA = 25°C, VCLAMP = 5 V
−40°C ≤ TA ≤ +125°C, VCLAMP = 5 V
−40°C ≤ TA ≤ +140°C, VCLAMP = 5 V
ISC
VOL
VOH
ISY
PSRR
RL = 10 kΩ to 5 V
RL = 10 kΩ to 0 V
−40°C ≤ TA ≤ +125°C, VO = 2.5 V,
VPOS = VNEG = 2.5 V, VDAC code = 128
−40°C ≤ TA ≤ +140°C, VO = 2.5 V,
VPOS = VNEG = 2.5 V, VDAC Code = 128
AV = 70
10°C < TPROG < 40°C, supply capable of
driving 250 mA
Min Typ
2
3
25
38 49
0.2
2.1
80 92
94 112
20
1000
0.35
0.5
7
10
14 18
600
0.2
50
5
3.3
200
1.2
3
5
4.94
2.0
109 125
5.0 5.25
Max Unit
10 µV
12 µV
65 nV/°C
54 nA
58 nA
60 nA
2.5 nA
3.0 nA
4.0 nA
2.9 V
dB
dB
ppm
ppm
1.6 %
2.5 %
20 ppm/°C
40 ppm/°C
22 kΩ
ppm/°C
0.6 %
ppm
35 mV
15 ppm FS/°C
25 ppm FS/°C
nA
500 nA
550 nA
4.94 V
7 mV
10 mA
20 mV
V
2.7 mA
2.78 mA
dB
5.5 V
Rev. B | Page 4 of 27
5 Page 
AD8556
100
10
IB–
VSY = 5V
TA = 25°C
IB+
1000
100
Data Sheet
VSY = 5V
+125°C
+25°C
–40°C
1
0123456
VCM (V)
Figure 10. Input Bias Current at VPOS, VNEG vs. Common-Mode Voltage
0.8
VSY = 5V
0.6
0.5
0.3
0.2
0
–0.2
–0.3
–0.5
–0.6
–0.8
–50
–25
0 25 50 75 100 125
TEMPERATURE (°C)
Figure 11. Input Offset Current vs. Temperature
150
2.5
VSY = 5.5V
2.0
1.5
1.0
0.5
0
0123456
DIGITAL INPUT VOLTAGE (V)
Figure 12. Digital Input Current vs. Digital Input Voltage (Pin 4)
10
0123456
VCLAMP VOLTAGE (V)
Figure 13. VCLAMP Current over Temperature at
VS = 5 V vs. VCLAMP Voltage
3.0
TA = 25°C
2.5
2.0
1.5
1.0
0.5
0
0123456
SUPPLY VOLTAGE (V)
Figure 14. Supply Current (ISY) vs. Supply Voltage
2.5
VSY = 5V
2.3
2.1
1.9
1.7
1.5
1.3
1.1
0.9
0.7
0.5
–50
–25
0 25 50 75 100 125 150
TEMPERATURE (°C)
Figure 15. Supply Current (ISY) vs. Temperature
Rev. B | Page 10 of 27
11 Page | ||
| Páginas | Total 28 Páginas | |
| PDF Descargar | [ Datasheet AD8556.PDF ] | |
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