Datasheet Analog Devices AD8270ACPZ-R7 — 数据表

Precision Dual-Channel
Difference Amplifier
AD8270 Data Sheet 1 –IN2A 2 +IN2A 3 +IN1A 4 10kΩ
10kΩ
10kΩ 13 –VS
10kΩ _ 10kΩ _ + + AD8270 10kΩ 10kΩ 12 –IN1B 11 –IN2B
10 +IN2B 9 +IN1B 6 7 8 REF2B REF1B 20kΩ REF2A 20kΩ 5 20kΩ 10kΩ 10kΩ REF1A 20kΩ Instrumentation amplifier building blocks
Level translators
Automatic test equipment
High performance audio
Sine/cosine encoders 14 OUTB 10kΩ 06979-001 –IN1A APPLICATIONS Figure 1. 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 singleended 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. Rev. A 15 OUTA FUNCTIONAL BLOCK DIAGRAM 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 …