4 Channel Extracellular Differential Amplifier

Overview

A four channel AC/DC pre-amplifier designed for amplifying weak signals such as extracellular action potentials, and weaker EEG and ECG signals. Its features include:

high common mode rejection, CMR – to minimize electrical interference
high input impedance, Z – (typically 10¹² Ω) ensures that the amplifier's high CMR will not be degraded by differences in source impedance at the input
high DC tolerance – allows the pre-amplifier to amplify much smaller extracellular action potentials (i.e. in microvolts) in the presence of larger DC electrode voltages (in volts)
high gain with low noise – to allow sufficient amplification options while limiting noise
an internal calibration signal – provides a convenient check of amplifier gain and operation
rack mount hardware – provides rack mountable option
two options of input cables – Unterminated or 2 mm pin and Alligator clip, which are selected at the time of purchase

Amplified signals can be recorded and analysed using a PowerLab and LabChart data acquisition system.

Configurations

Four Channel Differential Amp (2mm pin & Alligator clip)
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https://www.adinstruments.com/products/4-channel-extracellular-differential-amplifier#product-DP-304A/IC-4M

DP-304A/IC-4M

A low noise, high input impedance, four channel AC/DC differential pre-amplifier ideally suited for extracellular recordings. It has a voltage gain of x10, x100, x1000 and x10,000 and a CMR of 120 dB min at 60 Hz. Four IC-4M Input Cable Set for DP-301/304 (2mm Pin/Alligator Clip, 2pk) are supplied.

Four Channel Differential Amplifier (Unterminated)
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https://www.adinstruments.com/products/4-channel-extracellular-differential-amplifier#product-DP-304A/IC-2S

DP-304A/IC-2S

A low noise, high input impedance, four channel AC/DC differential pre-amplifier ideally suited for extracellular recordings. It has a voltage gain of x10, x100, x1000 and x10,000 and a CMR of 120 dB min at 60 Hz. Four standard IC-2S Input Cable Set for DP-301/304A (Unterminated, 2 pk) are supplied.

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Details and Tech Specs

Technical

Ordering information:

Input Cables: For each channel, the differential pre-amplifiers can be ordered with either the standard IC-2S Input Cable Set (Unterminated, 2 pack) or IC-4M Input Cable Set (2 mm Pin/Alligator Clip, 2 pack), at no additional cost if specified at time of order. If unspecified, the pre-amplifiers will ship with IC-2S Input Cable Set (Unterminated, 2 pack), which are not terminated at the outboard end.

Summary:

	DP-301	DP-304A
Voltage Gain, AC/DC	x100, x1000 and x10000	x10, x100, x1000 and x10000
Input Resistance, Z (typical)	10¹² Ω
Leakage Current (typical)	50 pA	1.0 pA
Common Mode Rejection, CMR	100 dB min (1,000,000:1) at 60 Hz	120 dB min (1,000,000:1) at 60 Hz
Noise, input shorted	10 µV p-p, 1 Hz to 10 kHz	8 µV p-p, 1 Hz to 10 kHz
Low Frequency Filter Settings (high pass)	0.1, 1.0, 10 and 300 Hz
High Frequency Filter Settings (low pass)	0.1, 1.0, 3.0 and 10 kHz	0.1, 0.3, 1.0, 3.0, 10, 50 kHz
Offset Control Range	-	±600 mV min at output, any gain setting
Calibration Signal	1 mV p-p at 10 Hz
Max. Common Mode Signal	±3 V	±2 V
Output Voltage Swing	±10 V	±10 V, ±5 V at x10 gain
Output Resistance	220 Ω	50 Ω
Input and Output Connectors	BNC
Power Requirements	4 x 9 V alkaline batteries	92 - 250 VAC, 50/60 Hz, 20 VA
Physical Size (H x W x D)	8.8 x 20 x 17.5 cm	9.0 x 42.5 x 19.0 cm
Shipping Weight	2.3 kg	4.55 kg
Warranty	Two years, parts and labor (excluding batteries)	One year on electrical components