1 Features

• VID V62/25635

• Radiation - Total Ionizing Dose (TID):

– TID performance assurance up to 30krad(Si)

– Radiation Lot Acceptance Testing (RLAT) for

every wafer lot up to 30krad(Si)

• Radiation - Single-Event Effects (SEE):

– Single Event Latch-Up (SEL) immune up to

43MeV-cm2 /mg at 125°C

– Single Event Transient (SET) characterized up

to LET = 47.5MeV-cm2 /mg

• Space Enhanced Plastic

– Operating temperature from –55°C to +125°C

– Controlled baseline

– Au bondwire and NiPdAu lead finish

– Outgassing test performed per ASTM E595

– One fabrication, assembly, and test site

– Extended product life cycle

– Product traceability

• Wide common-mode voltage:

– Operational voltage: 2.7V to 80V

– Survival voltage: −20V to 85V

• Excellent CMRR:

– 160dB DC

– 85dB AC at 50kHz

• Gain of 20V/V

– Gain error: ±0.1% (maximum)

– Gain drift: ±1.5ppm/°C

• Offset voltage: ±12μV (maximum)

• Offset drift: ±0.05μV/°C

• High bandwidth: 1.1MHz

• Slew rate: 2V/μs

• Quiescent current: 370μA

2 Applications

• Satellite electrical power system (EPS)

• Command and data handling (C&DH)

• Radar imaging payload

• Communications payload

3 Description

The INA950-SEP is an ultra-precise, current-sense amplifier that can measure voltage drops across shunt

resistors over a wide common-mode range from 2.7V to 80V. The ultra-precise current measurement accuracy

is achieved thanks to the combination of an ultra-low offset voltage of ±12μV (maximum), a small gain error

of ±0.1% (maximum), and a high DC CMRR of 160dB (typical). The INA950-SEP is not only designed for DC

current measurement, but also for high-speed applications (such as fast overcurrent protection, for example)

with a high bandwidth of 1.1MHz and an 85dB AC CMRR (at 50kHz).

The INA950-SEP provides the capability to make ultra-precise current measurements by sensing the voltage

drop across a shunt resistor over a wide common- mode range from 2.7V to 80V. The INA950-SEP is available

in the TSSOP-8 package.

The INA950-SEP operates from a single 2.7V to 5.5V supply while only drawing 370μA from the supply (typical).

The low offset of the zero-drift architecture enables current sensing with low ohmic shunts as specified over the

operating temperature range (−55°C to 125°C).