Bộ tiền khuếch đại điện áp chèn GRAS 26AG 1/2'' với đầu nối tích hợp.

GRAS 26AG 1/2" Insert Voltage Preamplifier with Integrated Connector

Part Number: GRAS 26AG

Category: GRAS Sound & Vibration

Status: Available

Freq range: 2.5 Hz - 200 kHz
Noise: 1.8 µV
Gain: -0.25 dB
Special feature: Insert voltage for determining open-circuit sensitivity of a microphone

Sale Price: Liên hệ

0903368648

+84903368648

The GRAS 26AG is a small robust preamplifier with insert voltage calibration facility. It has a very low inherent noise level, a wide dynamic range and a frequency response from below 2 Hz to above 200 kHz.

Technology

Typical application & use

Precision measurements

Low-pressure measurements

General-purpose preamplifiers

Design

All GRAS microphone preamplifiers are based on a small ceramic thick film substrate with a very high input impedance. The ceramic substrate is shielded by a guard ring to minimise the influence of stray capacitance and microphonic interference. The casing is made of stainless steel for maximum strength and durability. The small dimensions of the 26AG preamplifier ensures reliable operation under humid conditions owing to the heat generated by internal power dissipation.

Compatibility

The 26AG preamplifier is compatible with ½-inch microphones as defined in international standard IEC1094 Measurement Microphones, Part 4: Specifications for working standard microphones. The mounting thread (11.7 mm - 60 UNS-2) is compatible with other available makes of similar microphone preamplifiers.

The 26AG is integrated with a 7-pin LEMO series 1B plug and comes with an insert-voltage calibration facility for determining the open-circuit sensitivity of condenser microphones.

Connector

7-pin LEMO 1B male (ext. view)

Specifications

Frequency range (±0.2 dB) with 18 pF dummy microphone	Hz	2.5 to 200 kHz
Slew rate	V/µs	20
Input impedance	GΩ // pF	20 // 0.4
Output impedance	Ω	75
Maximum output voltage amplitude (±14 V / +28 V supply)	Vp	12
Maximum output voltage amplitude (±60 V / +120 V supply)	Vp	50
Noise (A-weighted) maximum	µV	2.5
Noise (A-weighted) typical	µV	1.8
Noise (Linear 20 Hz – 20 kHz) maximum	µV	6
Noise (Linear 20 Hz – 20 kHz) typical	µV	3.5
Gain	dB	-0.25
Single supply voltage	V	28 to 120
Balanced supply voltage	V	±14 to ±60
DC offset minimum (single supply)	V	0.5 × Vs − 1
DC offset maximum (single supply)	V	0.5 × Vs + 4
Balanced supply DC compensation	V	-1 to 4
Operating temperature range	°C / °F	-30 to 70 / -22 to 158
Storage temperature range	°C / °F	-40 to 85 / -40 to 185
Humidity range (non-condensing)	% RH	0 to 95
Connector type	–	LEMO 7-pin (FGG.1B.307)
CE / RoHS / WEEE compliance	–	Yes / Yes / Yes
Weight	g / oz	34.0 / 1.24