AD8138AARMZ Analog Devices Inc, AD8138AARMZ Datasheet - Page 16

• Manufacturer Part Number: AD8138AARMZ
• Description: MiniSO LoDstortn Differentl I/O 500MHz
• Manufacturer: Analog Devices Inc
• Type: ADC Driverr

Specifications of AD8138AARMZ

• Design Resources: DC-Coupled, Single-Ended-to-Differential Conversion Using AD8138 and AD7352 (CN0040) DC-Coupled, Single-Ended-to-Differential Conversion Using AD8138 and AD7356 (CN0041) DC-Coupled, Single-Ended-to-Differential Conversion Using AD8138 and AD7357 (CN0061)
• Applications: Data Acquisition
• Mounting Type: Surface Mount
• Package / Case: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AD8138
OPERATIONAL DESCRIPTION
DEFINITION OF TERMS
Differential voltage refers to the difference between two node
voltages. For example, the output differential voltage (or
equivalently output differential-mode voltage) is defined as
where V
−OUT terminals with respect to a common reference.
V
OUT, dm
V
+D
–D
+OUT
OCM
IN
IN
= (V
and V
R
R
G
G
+OUT
−OUT
Figure 42. Circuit Definitions
− V
refer to the voltages at the +OUT and
+IN
–IN
−OUT
AD8138
)
C
R
R
C
F
F
F
F
–OUT
+OUT
R
L, dm
V
OUT, dm
Rev. F | Page 16 of 24
Common-mode voltage refers to the average of two node
voltages. The output common-mode voltage is defined as
Balance is a measure of how well differential signals are
matched in amplitude and exactly 180° apart in phase. Balance
is most easily determined by placing a well-matched resistor
divider between the differential voltage nodes and comparing
the magnitude of the signal at the divider’s midpoint with the
magnitude of the differential signal (see Figure 41). By this
definition, output balance is the magnitude of the output
common-mode voltage divided by the magnitude of the output
differential mode voltage:
V
Output
OUT, cm
= (V
Balance
+OUT
+ V
Error
−OUT
=
)/2
V
V
OUT
OUT
,
,
dm
cm