AD8290ACPZ-RL Analog Devices Inc, AD8290ACPZ-RL Datasheet - Page 15

• Manufacturer Part Number: AD8290ACPZ-RL
• Description: IC,Sense Amplifier,SINGLE,CMOS,LLCC,16PIN,PLASTIC
• Manufacturer: Analog Devices Inc

Specifications of AD8290ACPZ-RL

• Amplifier Type: Current Sense
• Number Of Circuits: 1
• -3db Bandwidth: 250Hz
• Current - Input Bias: 100pA
• Current - Supply: 1.2mA
• Voltage - Supply, Single/dual (±): 2.6 V ~ 5.5 V, ±1.3 V ~ 2.75 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-LFCSP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Output Type: -
• Current - Output / Channel: -
• Slew Rate: -
• Gain Bandwidth Product: -
• Voltage - Input Offset: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AD8290
CURRENT SOURCE
PRECISION CURRENT
The AD8290 generates an excitation current that is
MIRROR
programmable with an external resistor, R
, as shown in
SET
Figure 44. A1 and M1 are configured to produce 0.9 V across
R
, which is based on an internal 0.9 V reference and creates a
M1
SET
A1
current equal to 0.9 V/R
internal to the AD8290. This current
SET
V
= 0.9V
REF
is passed to a precision current mirror and a replica of the current
is sourced from the IOUT pin. This current can be used for the
GND
RSET
IOUT
excitation of a sensor bridge. C
is used to filter noise from
BRIDGE
the current excitation circuit.
R
SET
C
BRIDGE
SENSOR
BRIDGE
Figure 44. Current Excitation
Rev. B | Page 15 of 20