ADA4806-1 0.2 μV/°C Offset Drift, 105 MHz, Low Power, Multimode, Rail-to-Rail Amplifier

The ADA4806-1 is a high speed, voltage feedback, rail-to-rail output, single operational amplifier with three power modes: full power mode, sleep mode, and shutdown mode. In full power mode, this amplifier provides a wide bandwidth of 105 MHz at a gain of +1, a fast slew rate 160 V/μs, and excellent dc precision with a low input offset voltage of 125 μV (maximum) and an input offset voltage drift of 1.5 μV/°C (maximum), while con-suming only 500 μA of quiescent current. Despite being a low power amplifier, the ADA4806-1 provides excellent overall performance, making it ideal for low power, high resolution data conversion systems.

For data conversion applications where minimizing power dissipation is paramount, the ADA4806-1 offers a method to reduce power by dynamically scaling the quiescent power of the ADC driver with the sampling rate of the system by switching the amplifier to a lower power mode between samples.

Sleep mode reduces the amplifier quiescent current to 74 μA and provides a fast turn-on time of only 0.45 μs, enabling the use of dynamic power scaling for sample rates approaching 2 MSPS. For additional power savings at lower samples rates, the shutdown mode further reduces the quiescent current to only 2.9 μA.

The ADA4806-1 operates over a wide range of supply voltages and is fully specified at supplies of 3 V, 5 V and ±5 V. This amplifier is available in a compact, 8-lead SOT-23 package and is rated to operate over the industrial temperature range of −40°C to +125°C.

Applications

Portable and battery-powered instruments and systems
High channel density data acquisition systems
Precision analog-to-digital converter (ADC) drivers
Voltage reference buffers
Portable point of sales terminals
Active RFID readers

Features and Benefits

Ultralow supply current

Full power mode: 500 μA
Sleep mode: 74 μA
Shutdown mode: 2.9 μA

Full power mode: 500 μA

Sleep mode: 74 μA

Shutdown mode: 2.9 μA

Fast turn-on time for dynamic power scaling ADC drivers:

0.45 μs from sleep mode
1.5 μs from shutdown mode

0.45 μs from sleep mode

1.5 μs from shutdown mode

Low input offset voltage and drift:

10 / 125 μV (typical / max)
0.2 / 1.5 μV/°C (typical / max)

10 / 125 μV (typical / max)

0.2 / 1.5 μV/°C (typical / max)

Low noise

5.9 nV/√Hz at 100 kHz
0.6 pA/ Hz at 100 kHz

5.9 nV/√Hz at 100 kHz

0.6 pA/ Hz at 100 kHz

Low Distortion (HD2/HD3)

−114 /−135 dBc at 20 kHz
−102 /−126 dBc at 100 kHz

−114 /−135 dBc at 20 kHz

−102 /−126 dBc at 100 kHz

High speed performance

−3dB bandwidth: 105 MHz
Slew rate: 160 V/ μs
0.1% Settling time: 35 ns

−3dB bandwidth: 105 MHz

Slew rate: 160 V/ μs

0.1% Settling time: 35 ns

Wide supply range: 2.7V to 10V

Small package: 8-lead SOT-23

Amplifiers

SPICE Models

ADA4806-1 SPICE Macro-Model .CIR

Data Sheets

Document	note
ADA4806-1: 0.2 μV/°C Offset Drift, 105 MHz, Low Power, Multimode, Rail-to-Rail Amplifier Data Sheet (Rev. 0)	PDF 654.25 K

User Guides

Document	note
UG-887: Evaluating the ADA4806-1 0.2 μV/°C Offset Drift, 105 MHz Low Power, Multimode, Rail-to-Rail Amplifier Offered in an 8-Lead SOT-23 (Rev. 0)	PDF 275.73 K