AD8253ARMZ-RL Analog Devices Inc, AD8253ARMZ-RL Datasheet - Page 21

• Manufacturer Part Number: AD8253ARMZ-RL
• Description: IC,Instrumentation Amplifier,SINGLE,CMOS,TSSOP,10PIN,PLASTIC
• Manufacturer: Analog Devices Inc
• Series: iCMOS®r

Specifications of AD8253ARMZ-RL

• Amplifier Type: Instrumentation
• Number Of Circuits: 1
• Slew Rate: 20 V/µs
• -3db Bandwidth: 10MHz
• Current - Input Bias: 5nA
• Voltage - Input Offset: 150µV
• Current - Supply: 4.6mA
• Current - Output / Channel: 37mA
• Voltage - Supply, Single/dual (±): ±5 V ~ 15 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 10-MSOP, Micro10™, 10-uMAX, 10-uSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Output Type: -
• Gain Bandwidth Product: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

APPLICATIONS INFORMATION
DIFFERENTIAL OUTPUT
In certain applications, it is necessary to create a differential
signal. High resolution analog-to-digital converters often require a
differential input. In other cases, transmission over a long distance
can require differential signals for better immunity to interference.
Figure 61 shows how to configure the AD8253 to output a
differential signal. An op amp, the AD8675, is used in an
inverting topology to create a differential voltage. V
output midpoint according to the equation shown in the figure.
Errors from the op amp are common to both outputs and are
thus common mode. Likewise, errors from using mismatched
resistors cause a common-mode dc offset error. Such errors are
rejected in differential signal processing by differential input
ADCs or instrumentation amplifiers.
When using this circuit to drive a differential ADC, V
set using a resistor divider from the ADC reference to make the
output ratiometric with the ADC.
+5V
–5V
AMPLITUDE
V
IN
+15V
+IN
10μF
–15V
0.1μF
0.1μF
10μF
+
–
DGND
AD8253
+15V
–15V
Figure 61. Differential Output with Level Shift
G = 1
DGND
REF
WR
REF
sets the
A1
A0
can be
REF
4.99kΩ
4.99kΩ
Rev. A | Page 21 of 24
0.1µF
56pF
–15V
SETTING GAINS WITH A MICROCONTROLLER
–
V
V
AD8675
OUT
OUT
B = –V
A = V
0.1µF
+
2
2
IN
IN
+15V
Figure 60. Programming Gain Using a Microcontroller
–IN
+IN
10μF
10μF
+ V
+ V
REF
REF
V
0V
AMPLITUDE
AMPLITUDE
REF
0.1µF
0.1µF
+2.5V
+2.5V
–2.5V
–2.5V
0V
0V
0V
+15V
–15V
+
–
AD8253
DGND
WR
A1
A0
REF
CONTROLLER
DGND
TIME
TIME
MICRO-
AD8253