AD8720_08 Datasheet, PDF (1/20 Pages) Analog Devices – Precision Dual-Channel, Difference Amplifier

FEATURES
With no external resistors
Difference amplifier: gains of 0.5, 1, or 2
Single ended amplifiers: over 40 different gains
Set reference voltage at midsupply
Excellent ac specifications
15 MHz bandwidth
30 V/μs slew rate
High accuracy dc performance
0.08% maximum gain error
10 ppm/°C maximum gain drift
80 dB minimum CMRR (G = 2)
Two channels in small 4 mm × 4 mm LFCSP
Supply current: 2.5 mA per channel
Supply range: ±2.5 V to ±18 V
APPLICATIONS
Instrumentation amplifier building blocks
Level translators
Automatic test equipment
High performance audio
Sine/Cosine encoders
GENERAL DESCRIPTION
The AD8270 is a low distortion, dual-channel amplifier with
internal gain setting resistors. With no external components,
it can be configured as a high performance difference amplifier
with gains of 0.5, 1, or 2. It can also be configured in over 40 single-
ended configurations, with gains ranging from −2 to +3.
The AD8270 is the first dual-difference amplifier in the small
4 mm × 4 mm LFCSP. It requires the same board area as a typical
single-difference amplifier. The smaller package allows a 2×
increase in channel density and a lower cost per channel, all
with no compromise in performance.
The AD8270 operates on both single and dual supplies and
requires only 2.5 mA maximum supply current for each ampli-
fier. It is specified over the industrial temperature range of
−40°C to +85°C and is fully RoHS compliant.
Precision Dual-Channel,
Difference Amplifier
AD8270
FUNCTIONAL BLOCK DIAGRAM
–IN1A 1
–IN2A 2
+IN2A 3
+IN1A 4
10kΩ
10kΩ
10kΩ
10kΩ _{_}
10kΩ
+
10kΩ
AD8270
10kΩ
10kΩ
10kΩ
10kΩ
12 –IN1B
11 –IN2B
10 +IN2B
9 +IN1B
20kΩ 20kΩ
20kΩ 20kΩ
Figure 1.
Table 1. Difference Amplifiers by Category
High
Speed
High
Single-Supply
Voltage Unidirectional
AD8270
AD628 AD8202
AD8273
AD629 AD8203
AMP03
Single-Supply
Bidirectional
AD8205
AD8206
AD8216
Rev. 0
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