Low Noise, High Speed Amplifier
for 16-Bit Systems
AD8021 ADC preamps and drivers
Instrumentation preamps
Active filters
Portable instrumentation
Line receivers
Precision instruments
Ultrasound signal processing
High gain circuits GENERAL DESCRIPTION
The AD8021 is an exceptionally high performance, high speed
voltage feedback amplifier that can be used in 16-bit resolution
systems. It is designed to have both low voltage and low current
noise (2.1 nV/√Hz typical and 2.1 pA/√Hz typical) while operating
at the lowest quiescent supply current (7 mA @ ±5 V) among
today’s high speed, low noise op amps. The AD8021 operates
over a wide range of supply voltages from ±2.25 V to ±12 V, as
well as from single 5 V supplies, making it ideal for high speed,
low power instruments. An output disable pin allows further
reduction of the quiescent supply current to 1.3 mA. LOGIC
1
REFERENCE AD8021 8 DISABLE –IN 2 7 +VS +IN 3 6 VOUT –VS 4 5 CCOMP Figure 1. SOIC-8 (R-8) and MSOP-8 (RM-8) The AD8021 allows the user to choose the gain bandwidth
product that best suits the application. With a single capacitor, …