GRAS 26CA 1/2'' CCP Standard Preamplifier with BNC Connector

Freq range: 2.5 Hz - 200 kHz
Noise: 1.8 µV Gain: -0.30 dB
Special feature: General purpose

GRAS 26CA 1/2'' CCP Standard Preamplifier with BNC Connector

Technology

Typical applications and use

CCP inputs (ICP ®)

Prepolarized microphones 

1/2" precision microphones

High levels and high frequencies

Design

The GRAS 26CA 1/2'' CCP Standard Preamplifier is a small, robust unit and uses a CCP power supply (ICP ®), e.g. GRAS 12AL. It has a very low inherent noise level, a large dynamic range and a frequency response from below 2 Hz to above 200 kHz.

Its small ceramic thick-film substrate has a very high input impedance, and is shielded by a guard ring to minimise the influence of stray capacitance and microphonic interference.

The 26CA is delivered with Generation II TEDS. The calibration data is programmed into the built-in TEDS according to IEEE 1451.4 using UDID I27-0-0-0U. If your measurement platform supports Transducer Electronic Data Sheets you will be able to read and write data like properties and calibration data.

Generation II TEDS chip (DS2431) may require updated system software.

It can be used with all GRAS prepolarized microphones, namely: 1/2" microphones: GRAS 40AE, 40AD and 40AQ 1/4-inch microphones: GRAS 40BE and 40BD, using the optional 1/2"-inch to 1/4-inch adaptor RA0019.

It has an integrated BNC output connector. The casing is made of stainless steel for maximum strength and durability.

® ICP is a registered trademark of PCB Piezotronics Inc.

* Transducer Electronic Data Sheet - IEEE-P1451.4

Specifications

Frequency range (±0.2 dB) with 18 pF microphone dummy
Hz
2.5 to 200 k
Slew rate
V/µs
20
Input impedance
GΩ // pF
20 // 0.4
Output impedance
Ω
< 50
Output Voltage Swing, min. @ 24-28 V CCP voltage supply
Vp
8
Noise (A-Weighted) max.
µV
2.5
Noise (A-Weighted) typ.
µV
1.8
Noise (Linear 20 Hz – 20 kHz) max.
µV
6
Noise (Linear 20 Hz – 20 kHz) typ.
µV
3.5
Gain
dB
-0.30
Power supply (Constant Current Power)
mA
2 to 20 (typical 4)
DC bias voltage, typ.
V
12
Temperature range, operation
°C / °F
-30 to 70 / -22 to 158
Temperature range, storage
°C / °F
-40 to 85 / -40 to 185
Humidity range non condensing
% RH
0 - 95
TEDS UDID (IEEE 1451.4)
I27-0-0-0U
Connector type
BNC
CE/RoHS compliant/WEEE registered
Yes / Yes, Yes
Weight
g / oz
26.0 / 0.92

Conditions: 23 °C Ambient temperature, 4 mA / 24 V open loop CCP voltage, 18 pF dummy microphone, 3 m output coax-cable.

 

Typical low-frequency response for ½″ (20 pF), ¼″ (6.5 pF) and ⅛″ (3 pF) microphones

 

 

Typical max. rms output signal with 120 V and 30 V supply

 
GRAS Sound & Vibration reserves the right to change specifications and accessories without notice.

Dimensions

Ordering info

Optional items

GRAS AA0035

3 m BNC - BNC Cable

GRAS AA0039-CL

Customized Length BNC - BNC Cable

GRAS AL0008

1/2" Microphone Holder, POM

GRAS AL0012

1/2" Microphone Holder, Stainless Steel

GRAS AL0005

Swivel head

GRAS AL0006

Tripod

GRAS RA0019

Adapter for 1/4" microphone and 1/2" preamplifier

GRAS RA0073

Adapter for 1" microphone and 1/2" preamplifier

GRAS RA0190

Right-angled (90º) Adapter for 1/2" Microphone and 1/2" Preamplifier

GRAS RA0018

20 dB Attenuator for prepolarized 1/2" microphones

GRAS RA0062

20 pF Preamplifier-input Adapter for 1/2" preamplifiers

GRAS 12AL

1-Channel CCP Power Module with A-weighting filter

GRAS 12AQ

2-Channel Universal Power Module with signal conditioning and PC interface

 GRAS Sound & Vibration reserves the right to change specifications and accessories without notice.

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