SGM8609-1

Active

3fA Input Bias Current, Rail-to-Rail Input and Output Precision Amplifier

SGM8609-1.pdf

The SGM8609-1 is a high precision, rail-to-rail input and output amplifier with an ultra-low input bias current at the 3fA level. The maximum limit of input bias current is ±20fA at +25℃ and ±900fA at +85℃. The device can keep this ultra-low input bias current within most of its input common mode voltage range.

The SGM8609-1 has a maximum low input offset voltage of ±200μV and a low input offset voltage drift of 1.4μV/℃. The typical value of its input voltage noise density can be as low as 7nV/√Hz . These combined characteristics make the device a good choice for high precision applications that require both accuracy and sensitivity in the system.

Additionally, the SGM8609-1 features a high gain-bandwidth product of 14MHz and a high open-loop voltage gain of 101dB. The device is suitable for use in signal conditioning, sensor interfaces and electrochemical cells.

The SGM8609-1 operates from 2.8V to 5.5V single supply or ±1.4V to ±2.75V dual supplies, and consumes only 3.4mA quiescent current at V_S = 5.5V. It is well-suited for portable and battery-powered equipment.

The SGM8609-1 is available in a Green SOIC-8 package. It features a unique pinout designed to isolate the input of the amplifier from the output and power supply pins. This special pin layout can help minimize system errors by reducing the leakage current between the input pins and the printed circuit board.

The SGM8609-1 operates over an ambient temperature range of -40℃ to +125℃.

FEATURES

Ultra-Low Input Bias Current (V_CM = [(+V_S) + (-V_S)]/2)
- ±3fA (TYP) at +25℃ when (+V_S) - (-V_S) = 5V
- ±10fA (TYP) at +25℃ when (+V_S) - (-V_S) = 2.8V
- ±900fA (MAX) at +85℃
Low Input Offset Voltage: ±30μV (TYP), ±200μV (MAX)
Low Input Offset Voltage Drift: 1.4μV/℃ (TYP)
DC CMRR: 98dB (TYP)
Open-Loop Voltage Gain: 101dB (TYP)
Low Input Voltage Noise: 7nV/√Hz at 1kHz
Low THD+N: 0.0007%
Gain-Bandwidth Product: 14MHz
Falling Edge Slew Rate: 8.5V/μs
Rail-to-Rail Input and Output
Supply Voltage Range: 2.8V to 5.5V
Quiescent Current: 3.4mA (TYP)
-40℃ to +125℃ Operating Temperature Range
Available in a Green SOIC-8 Package

APPLICATIONS

Transimpedance Amplifiers (TIAs) for Photodiodes
Buffers with High-Impedance Characteristic for Sensors
Picoammeters or Coulombmeters
Electrometers
Electrodes of pH Measurement

Ordering Information

Part Number	Status	Package	Pins	Pd-Free	RoHS	REACH	Green	MSL Rating	Operating Temperature Range	Material Content	Reliability Report	Unit Resale Price* (Volume Range: in USD)	Lead Time** (Volume Range: Days)
SGM8609-1XS8G/TR	Active	SOIC-8	8	YES	YES	YES	YES	MSL1	-40℃ to +125℃	View	View

* The unit resale price is for reference purposes only. Please contact our distributors for a formal quotation.

** The lead time provided is for reference purposes only and is subject to change based on different circumstances.