PGA204AU

Minimum Operating Temperature : - 40 C
Operating Supply Voltage : 36 V
Number of Channels : 1
Maximum Operating Temperature : + 85 C
Packaging : Tube
Available Set Gain : 60 dB
Input Offset Voltage : 125 uV
Maximum Input Resistance : 10000 MOhms
Common Mode Rejection Ratio (Min) : 106 dB
Supply Current : 7.5 mA
Package / Case : SOIC-16


Description

The PGA204AU is one member of the PGA204 series.The PGA204 is low cost, general purpose programmable-gain instrumentation amplifier  offering excellent accuracy. Gains are digitally selected: PGA204-1, 10, 100, 1000. The precision and versatility, and low cost of the PGA204 make it ideal for a wide range of applications.

Features of the PGA204 are:(1)low offset voltage: 50V max;(2)low input bias current: 2nA max;(3)low quiescent current: 5.2mA typ;(4)16-pin plastic dip, SOL-16 packages.This integrated circuit can be damaged by ESD. Burr-Brown recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.

Many applications that need input stage offset adjustment do not need output stage offset adjustment. Figure 3 also shows a circuit for adjusting output offset voltage. First, adjust the input offset voltage as discussed above. Then program the device for G=1 and adjust the output to zero.The output offset adjustment can be used to trim sensor or system offsets without affecting drift. The voltage applied to the Ref terminal is summed with the output signal. Low impedance must be maintained at this node to assure good common-mode rejection. This is achieved by buffering the trim voltage with an op amp as shown.Input circuitry must provide a path for this input bias current if the PGA204 is to operate properly. Figure 4 shows provisions for an input bias current path. Without a bias current return path, the inputs will float to a potential which exceeds the common-mode range of the PGA204 and the input amplifiers will saturate. If the differential source resistance is low, bias current return path can be connected to one input (see thermocouple example in Figure 4). With higher source impedance, using two resistors provides a balanced input with possible advantages of lower input offset voltage due bias current and better common-mode rejection.

Parameters:

Technical/Catalog Information	PGA204AU
Vendor	Texas Instruments
Category	Integrated Circuits (ICs)
Packaging	Tube
Amplifier Type	Instrumentation
Number of Circuits	1 - Single
Package / Case	16-SOIC (7.5mm Width)
Slew Rate	0.7 V/s
Gain Bandwidth Product	-
Current - Supply	5.2mA
Current - Output / Channel	23mA
Voltage - Supply, Single/Dual (±)	9 V ~ 36 V, ±4.5 V ~ 18 V
Output Type	-
-3db Bandwidth	1MHz
Current - Input Bias	500pA
Operating Temperature	-40°C ~ 85°C
Voltage - Input Offset	25V
Drawing Number	296; 4040000-2; DW; 16
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	PGA204AU PGA204AU