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Model 6165, 2-Channel Instrumentation Amplifier-Filter-Analog Output, 300CMV


  • Isolated input with 300 Volts common mode
  • Automatic zero
  • Voltage Substitution Calibration
  • Gains 1 to 5,000 with 50 kHz or 100 kHz bandwidth
  • Programmable low-pass filters
  • Dual buffered 10 Volt analog outputs


The 6165 is a two-channel instrumentation amplifier module. Each channel has isolated input, 100 kHz bandwidth and two outputs that can be filtered or wideband.

The input is two-wire shielded and is isolated from the outputs, power and control interface. This gives the user complete freedom to ground the input without creating ground loops that introduce noise and offset errors. The isolation provides for operation with up to ±300 Volts of common mode applied to the input.

The differential instrumentation amplifier has programmable gains from 1 to 5,000 and automatic zero. The standard filter is a six-pole Bessel with four programmable bandwidths and wideband. An optional four-pole Bessel filter has continuously programmable bandwidth with 1 Hz resolution below 1 kHz and 5 Hz above 1 kHz. Each channel has two buffered, ±10 Volt outputs. The output can be digitally monitored using any of the supported interfaces.

Voltage substitution calibration, employing an external standard, is provided for gain calibration. Automatic zero and gain calibration are implemented in PI660 software.

Overview  · Input  · Amplifier  · Filter  · Digitizer  · Calibration  · General  · Ordering Information 


Measurement Type

Instrumentation Amp

Analog Bandwidth

50 kHz



Analog Output

Buffered Analog Output



2 channels, differential 2 wire plus shield.


±2 mV to ±10 Volts full scale.


50 Megohms, shunted by 500 pF.


±50 Volts, differential and ±350 Volts common mode.



Programmable 1 to 5000, in 1, 2, 3, 5 steps, with ±0.05% accuracy.

Gain Stability

±0.01% for 30 days, ±0.004%/ºC.


±0.01% for gains < 1,000, ±0.02% for gain 1,000 and higher.

Common Mode

80 dB plus gain in dB to 120 dB for balance input and 110 dB for a 350 Ohm source unbalanced, ±300 Volts, DC to 60Hz.

CM Voltage

±300 Volts operating.


Automatic zero to ±2 µV RTI or ±1.0 mV RTO whichever is greater.

Zero Stability

±1 µV/°C RTI, ±0.2 mV/°C RTO or (±1 µV RTI, ±0.2 mV RTO) /°C

Source Current

±25 nA, ±0.05 nA/ºC

Noise (10 kHz)

2.0 µV RTI plus 0.3 mV RTO, RMS.


50 kHz (-3 dB) for gains 1 to 1,000, 20 kHz (-3 dB) for gains above 1,000.

Bandwidth (HF)

100 kHz (-3 dB) for gains 1 to 1,000, 50 kHz (-3 dB) for gains above 1,000.

Slew Rate

5 V/µS

Overload Recovery

120 µS to within ±0.1% for a 10 times overload to ±10 Volts.


Output is read by a program instruction. Resolution is ±0.003%.


Two ±10 Volt full scale buffered outputs. Each may be program selected for filtered or wideband response.



4 Frequency Six-pole, low-pass Bessel or continuously programmable 4-pole Bessel.

Standard Filter

6060: 4-Frequency 6-Pole Bessel with 150 Hz, 625 Hz, 2.5 kHz, 10 kHz and wideband.
6060HF: 4-Frequency 6-Pole Bessel with 300 Hz, 1.25 kHz, 5 kHz, 20 kHz and wideband.

Programmable Filter

6060: 4-Pole Bessel, continuously programmable 4 Hz to 10 kHz.
6060HF: 4-Pole Bessel, continuously programmable 10 Hz to 20 kHz.


Other filter characteristics and cut offs are available.


Digitizer Note

See Series 6000 to add the following onboard digitizing capability.


±50 ns channel-to-channel time correlation.


16-bits, two's complement output.


Programmable up to 200 kS/s per channel.

Digitizer Linearity

±1-1/2 LSB (±0.004%)

Continuity (Digitizer)

Monotonic to 15 bits.


Two alarms each with upper and lower limits that are programmable from negative to positive full scale. Limits checked on each ADC sample.


Voltage Substitution

Alternate input for external calibration source. Programmable 1, 0.1 and 0.01, attenuation with ±0.02% accuracy. Attenuator output may be connected to bus for external monitoring.

Zero Calibration

Amplifier input disconnected and shorted for zero calibration.



Occupies one slot in Series 6000 enclosures.


Inputs are 15-pin and outputs are 9-pin Type D.

Operating Temperature

0 to +50 ºC

Ordering Information 

Ordering Information

6065HF-PF10/20K-BE4 - 2-Ch Instrumentation Amp, 4-Pole PF 10Hz-20kHz Bessel.
6065HF-PF4-BE6 - 2-Ch Instrumentation Amp, 4-Freq 6-Pole Bessel.


Model 6165
(PDF, 96KB)

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