AD8215YRZ Analog Devices Inc, AD8215YRZ Datasheet - Page 10

• Manufacturer Part Number: AD8215YRZ
• Description: IC CURRENT MONITOR 0.15% 8SOIC
• Manufacturer: Analog Devices Inc
• Type: Current Sense Ampr

Specifications of AD8215YRZ

• Function: Current Monitor
• Sensing Method: High/Low-Side
• Accuracy: ±0.15%
• Voltage - Input: -2 ~ 65 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Number Of Channels: 1
• Number Of Elements: 1
• Power Supply Requirement: Single
• Common Mode Rejection Ratio: 80dB
• Input Resistance: 5@5VMohm
• Input Offset Voltage: 1@5VmV
• Single Supply Voltage (typ): 5V
• Dual Supply Voltage (typ): Not RequiredV
• Power Supply Rejection Ratio: 75dB
• Rail/rail I/o Type: No
• Single Supply Voltage (min): 4.5V
• Single Supply Voltage (max): 5.5V
• Dual Supply Voltage (min): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Operating Temp Range: -40C to 125C
• Operating Temperature Classification: Automotive
• Mounting: Surface Mount
• Pin Count: 8
• Package Type: SOIC N
• No. Of Amplifiers: 1
• Gain Db Max: 20dB
• Bandwidth: 450kHz
• Cmrr: 120dB
• Slew Rate: 4.5V/µs
• Supply Voltage Range: 4.5V To 5.5V
• Supply Current: 1.3mA
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Lead Free Status / RoHS Status: Compliant, Lead free / RoHS Compliant

AD8215
THEORY OF OPERATION
In typical applications, the AD8215 amplifies a small differential
input voltage generated by the load current flowing through a
shunt resistor. The AD8215 rejects high common-mode
voltages (up to 65 V) and provides a ground-referenced,
buffered output that interfaces with an analog-to-digital converter
(ADC). Figure 26 shows a simplified schematic of the AD8215.
I
IN
R
R1
OUT
A1
R
I
SHUNT
SHUNT
GND
Figure 26. Simplified Schematic
PROPRIETARY
CIRCUITRY
OFFSET
AD8215
R
G = +20
V+
OUT =
(I
SHUNT
× R
SHUNT
) × 20
Rev. 0 | Page 10 of 16
A load current flowing through the external shunt resistor
produces a voltage at the input terminals of the AD8215. The
input terminals are connected to A1 by R and R1. The inverting
terminal, which has very high input impedance, is held to
because negligible current flows through R. A1 forces the
noninverting input to the same potential. Therefore, the current
that flows through R1 is equal to
This current (I
output buffer amplifier has a gain of 20 V/V and offers excellent
accuracy as the internal gain setting resistors are precision trimmed
to within 0.01% matching. The resulting output voltage is equal to
(V
I
OUT = (I
IN
CM
= (I
) − (I
SHUNT
SHUNT
SHUNT
IN
) is converted back to a voltage via R
× R
× R
× R
SHUNT
SHUNT
SHUNT
)/R1
) × 20
)
OUT
. The