DAM series Bioamplifier
A family of very low battery operated amplifiers
WPI's DAM series amplifier’s are well known as a standard of the industry for extracellular potential amplification. These battery powered bio-amplifiers are designed with a compact chassis profile that enables the user to locate the unit closer to the preparation and thereby minimize long lead lengths which contribute to noise. Each amplifier is equipped with selectable high and low filters, and a position control to offset galvanic potentials which may develop during recording. A choice of models offer additional features that are useful for certain applications:
- Gated or manual current generation for histological marking, iontophoresis, or cell stimulation.
- An very low noise remote active headstage (DAM80 only) is useful for very high impedance amplification utilizing glass or metal electrodes. DAM series amplifiers can be used as standalone units on any tabletop, or use optional clamp-mounting hardware to locate them conveniently within the work area. Alternatively, a pair of amplifiers can be mounted into a standard equipment rack with a rack mount kit (#3484 ). A variety of hook up accessories are available to configure your application.
|
|
| DAM50 - Basic Amplifier (optional #5447 electrode adapter not include) |
DAM80 - With low-noise headstage DAM80P (Metal microelectrode adapter #5469 included.) |
| DAM80, an AC amplifier only, features a very low noise headstage probe which can be mounted in micromanipulators for up-close cortical recording, for extracellular recording from high impedance glass or metal microelectrodes. Also provides a gated current for tissue marking. Microelectrode holder MEH3SB is recommended. |
| Feature |
DAM50
|
DAM80
|
| Input mode |
AC/DC
|
AC
|
| Input configuration |
Differential/single ended
|
Differential
|
| Gain Range |
100-10K (AC), 10-1K (DC)
|
100-10K (AC)
|
| High/Low filters |
Y
|
Y
|
| Offset position control |
Y
|
Y
|
| Current Generator |
N
|
Y
|
| Stimulus Artifact Suppression |
N
|
N
|
| Remote Active headstage |
N
|
Y
|
| Output Connection |
BNC
|
3.5 mm mini phone
|
| Standard input connection* |
unterminated wire
|
mini banana
|
| Power Supply |
(2) nine volt alkaline batteries
|
(2) nine volt alkaline batteries
|
| *See optional accessories for additional alternatives |
|
| DAM SERIES SPECIFICATIONS |
| INPUT IMPEDANCE |
1012 Ohms, common mode and differential |
| INPUT LEAKAGE CURRENT |
50 pA (typical) |
| MAX. DC DIFFERENTIAL SIGNAL |
± 2.5 V (DAM 50) |
| GAIN |
AC: 100x, 1000x, 10000x
DC: 10x, 100x, 1000x (DAM50) |
| COMMON MODE REJECTION RATIO |
100 dB @ 50/60 Hz |
| INPUT APACITANCE |
20pF |
| AC Mode Noise |
0.4 µV RMS (2 µV p-p) 0.1-100 Hz
|
| AC Mode Noise |
2.6 µV RMS (10 µV p-p) 1 Hz-10 kH |
| DC Mode (DAM50) |
7.5 µV RMS (30 µV p-p) 3-10 kHz |
| BANDWIDTH FILTER SETTINGS |
| AC Mode |
Low frequency, 0.1, 1, 10, 300 Hz |
| AC Mode (DAM80) |
High frequency, 0.1, 1, 3, 10 kHz |
| DC Mode (DAM50) |
High frequency, 0.1, 1, 3, 10 kHz |
| OUTPUT CONNECTIONS |
BNC on DAM50; 3.5 mm Miniphone connection on DAM80 |
| OUTPUT VOLTAGE SWING |
±8 V |
| OUTPUT RESISTANCE |
470 Ohms |
| BATTERY TEST |
Audible tone |
| CALIBRATOR SIGNAL |
10 Hz square wave |
| POSITION |
Approx. 250 mV |
| CURRENT SOURCE |
| DAM80: DC Generator |
0 to ±50 µA, variable |
| EXTERNAL COMMAND |
Input Voltage ±10 V commands |
| AC or DC current waveform |
±50 µA max. amplitude @ 200 K Ω |
| BATTERIES |
2 x 9 V alkaline (included) |
| DIMENSIONS |
| DAM50 |
8 x 4 x 1.75 in. (20.3 x 10.2 x 4.4 cm) |
| DAM80 |
7 x 4 x 1.75 in. (17.8 x 10.2 x 4.4 cm) |
| SHIPPING WEIGHT |
3.5 lb (1.6 kg) |
|
| DAM50 |
Bio-amplifier |
| DAM80 |
Bio-amplifier with active probe (DAM80P) |
|
| OPTIONAL ACCESSORIES |
| DAM80P |
Replacement Probe |
| 3072 |
6 Replacement Modular Cables |
| 3517 |
2 Optional Shielded Modular Cables |
| CBL102 |
3.5 mm Phone plug-to-BNC Cable |
| 2033 |
Black Insulated Mini-Banana Plug |
| 2034 |
Red Insulated Mini-Banana Plug |
| 2035 |
Uninsulated Mini-Banana Plug |
| 2101 |
9V Alkaline Battery, each (2 required) |
| 3484 |
Rack Mount Kit (for 2 DAM preamps) |
| 3485 |
Ringstand Mounting Kit |
| 5447 |
Electrode Adapter |
| 5469 |
Metal Microelectrode Adapter for DAM80 (mini-banana plug to 0.031 in. (0.79 mm) socket) |
| 5489 |
Adapter for Metal Microelectrode (DAM50) |
| 3578 |
Adapter Cable for Ag/AgCI pellets (2 mm pin) |
| 300102 |
Electrode Extention 4-inch |
| 3414 |
9V NiMH Battery |
| 13388 |
Adapter, mini-banana plug to 2mm socket |
|
