Tera-Ohm Input impedance.
Enhanced ESD protection.
Precision pH Probe Temp. Compensation
200 femto-amp. input bias precision
Selectable Low-pass filter ,,, 16Hz
Offset Voltage Null Capability
Constant within a wide temperature range
Short Circuit Protection
Low Power Consumption
( 2-3 weeks Delivery, Call for order quantities greater than 5 )
When Set as a pH amplifier w/
Use a typical mV output pH Probe for the input of the UVM module. A typical pH probe in a 25 deg.C
environment transfers ±59.2mV per pH unit and outputs zero at a pH of 7. The pH electrode output voltage
increases or decreases as the medium the probe is in becomes more Alkaline or more Acidic, respectively.
The transfer function of a typical 59.2mV/pH electrode, though predictable, is temperature dependent
(-54.2mV/pH at 0 Deg.C and -74.04mV/pH at 100 Deg.C). An external temperature sensor, from our pH
amplifier, placed within the same environment of the pH probe will result in a temperature compensated
output (Vout) as indicated in Table #1. Our UVM amplifier temperature compensated output (JP1-3; Block
diagram) is centered at 0V for a pH of 7 and has a transfer function of 1.00V/pH unit. The output range spans
from -7.00V (pH = 0) to +7.00V (pH =14).
|pH Probe Temperature (Deg.C)||pH Probe output (mV)||Post-Amp. Output (V)||Temp. Compensated Output (V)|
When Set as a general purpose micro-Volt amplfier:
The UVM module needs to be set for no temperature compensation. More specifically, the output (JP1-2; Block
diagram) of the UVM module is the same as the output of the post-amp. This unit delivers up to a gain of 50
and has a GBP of 400KHz when the low pass filter is disabled. Refer to the below block diagram and specs. for
for more details.
UVM Series Module
|Max Gain Setting - Post Amp.||50||Input capacitance less than (Cdiff & Ccm)||3||pf|
|Input voltage Range||±2.0||V||Voltage Noise Density f = KHz||25||nV/sqr(Hz)|
|Voltage Noise Density f =10KHz||22||uV/sqr(Hz)|
|Max. Output Load Current - Post-Amp.||±6.0||mA||Current Noise Density f =1KHz||0.05||pA/sqr(Hz)|
|Max. Output Load Current - Temp. Compensated Output||±10.0||mA||Slew Rate (Rload = 10KΩ)||0.1||V / us|
|Output voltage range||±12||V||Peak to Peak Noise ( @unity 0.1Hz to 10Hz)||3||uV|
|Output Impedance - Temp. Compensated Output||0.1||Ω||Gain Bandwidth Product (R-load = 100KΩ)||385||KHz|
|Output Impedance (closed loop) - Post-Amp. Output||36||Ω||Operating Temperature||10 to 40||C|
|DC Supply Voltage||±15||VDC|
|Max. Input Offset Voltage (12uV typical)||50||uV||Signal In / Out connector||BNC or SMA||female|
|Input Bias Current less than (200fA typical)||± 1.0||pA||Power connector||4 pin Mini-Din||female|
|Max. Input Offset Voltage Drift (1uV typical)||4.5||uV/Deg.C||Temperature Sensor connector||3 pin Mini-Din||female|
L x H x W;
(Will Scale to your application)