Legacy Amplifier Products
This page lists legacy or discontinued amplifier boards only
For a list of current SR products, please see our
Catalog page
| Amplifiers | ||||
| Product | Features | Use With | Price | |
| AMP4CH-DF | 4 channels, gain = 100 (40 Db), differential inputs | PAR4CH | $250 | |
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AMP4CH-DF Spec Sheet
Not recommended for new designs.
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Download PDF Product Flyer 
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Product Description
The AMP4CH-DF is a 4 channel amplifier for use with differential
inputs like those needed to drive the PAR4CH 24-bit
data acquisition system. In its standard configuration, the AMP4CH-DF
provides a gain of 100 on each analog input channel while using only
120 ma.
The AMP4CH-DF allows high resolution acquisition of very small signals. With its standard x 100 gain, the AMP4CH-DF allows signals as small as +/- 100 millivolt to span the full +/- 10 volt analog input range of the PAR4CH. Designed with extremely good noise characteristics, the AMP4CH-DF adds almost no detectable noise to the final acquired data.
The AMP4CH-DF comes with all the accessories you need. These include an enclosure that stacks nicely with the PAR4CH and the power and D-shell cables for connecting to the PAR4CH. All you supply are the analog inputs.
The gain on each channel is controlled by a resistor. Soldering on a different resistor changes the gain. Custom gain configurations are available for a small fee when placing your order.
Specifications Table
| AMP4CH-DF Specs | ||
| Channels: | 4 | |
| Gain: | Factor of 100 or 40 Db | |
| Analog Input Type: | Differential | FAQ note |
| Analog Input Voltage: | +/-100mv with gain of 100 and PAR4CH | FAQ note |
| Analog Input Impedance: | Resistor in parallel with high impedance op amp input. Nominally 51K. | FAQ note |
| Analog Input Header: | 15 pin D-Shell or plain wire with TRM15E | |
| Analog Input Cable: | Not supplied, twisted pair recommended | FAQ note |
| Noise: | Resolution, crosstalk and common mode rejection of PAR4CH unchanged at an amplifier gain of 100 | FAQ note |
| PAR4CH Connection: | 15 pin D-Shell female-female cable and 2.1mm daisy chain power cable | |
| Power Requirements: | 9 to 24 vdc or vac, 9 volts DC preferred, 120ma @+9v | |
| Board Dimension: | 5.25" W x 6.00" D, same as PAR4CH | |
| Enclosure Dimension: | 5.50" W x 1.63" H x 6.50" D | |
| ROHS Compliance: | Compilant by exemption | FAQ note |
| Price: | See "in the box" table below | |
Documents and Software
These documents represent the complete specs for this product.
They can also be found on our
Legacy Downloads page.
| AMP4CH-DF Documents | ||||
| Category | Description | Rev | File | # bytes |
| Product Flyer | AMP4CH-DF specs | 2012/01/05 | flyamp4chdf.pdf | 47,729 |
Price Table
The following items may be purchased individually or at a discount as a bundled "in the box" system. When purchasing a AMP4CH-DF "in the box" system, the following are included:
| AMP4CH-DF In The Box | ||
| Item | Description | Price |
| BOARD-AMP4CH-DF | Four channel amplifier with 100x gain | $220 |
| CASE-AMP4CH-DF | Vinyl coated steel enclosure with rubber feet | $40 |
| CABLE-RIBBON15-FF | 5" DB15 female to female ribbon cable sends amplified input to A/D | $5 |
| CABLE-2.1-MM | 6" power cable with 2.1mm plugs on each end for daisy chaining power | $5 |
| CD-AMP4CH-DF | CD with PDF user manual | $1 |
| Individual item subtotal = | $271 | |
| "In the box" discount ( box contents photo ) | - $21 | |
| AMP4CH-DF | Final price (how to order) = | $250 |
Options
Some users may want to consider these additional options:
| AMP4CH-DF Options | ||
| Item | Description | Price |
| TRANS-WALL-09V-DC TRANS-EURO-09V-DC |
9 vdc wall transformer (US 110 or Euro 220 vac) for powering the AMP4CH-DF separately rather than daisy chaining with the PARxCH |
N/A $15 |
| AMP4CH-CHANGE-GAIN | Install custom gain resistors on each AMP4CH-DF channel. Contact customer support for the available values. |
$20 |