1 Features
• VID In Progress
• 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
• Supports defense, aerospace, and medical
applications
– 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: −4V to +80V
– Survival voltage: −20V to +85V
• Excellent CMRR:
– 160dB DC-CMRR
– 85dB AC-CMRR at 50kHz
• Accuracy:
– Gain:
• Gain error: ±0.15% (maximum)
• Gain drift: ±10ppm/ °C (maximum)
– Offset:
• Offset voltage: ±30μV (typical)
• Offset drift: ±0.05μV/ °C (typical)
• Available gain:
– INA951-SEP A1, : 20V/V
• High bandwidth: 1.3MHz
• Slew rate: 2.5V/μs
• Quiescent current: 1.5mA

2 Applications
• Satellite electrical power system (EPS)
• Command and data handling (C&DH)
• Radar imaging payload
• Communications payload

3 Description
The INA951-SEP is a current sense amplifier that can
measure voltage drops across shunt resistors over
a wide common-mode range from –4V to 80V. The
negative common-mode voltage allows the device to
operate below ground, thus accommodating precise
measurement of recirculating currents in half-bridge
applications. The combination of a low offset voltage,
small gain error and high DC CMRR enables highly
accurate current measurement. The INA951-SEP is
not only designed for DC current measurement, but
also for high-speed applications (ex. Fast over-current
protection) with a high bandwidth of 1.3MHz and an
85dB AC CMRR (at 50kHz).
The INA951-SEP operates from a single 2.7V to 10V
supply, drawing 1.5mA of supply current. The INA951-
SEP is available with a gain option of 20V/V.
The INA951-SEP is specified over an operating
temperature range of −40°C to +125°C and is offered
in a space-saving SOT-23 package.