Electronic Components Datasheet Search |
|
MPY534 Datasheet(PDF) 6 Page - Texas Instruments |
|
MPY534 Datasheet(HTML) 6 Page - Texas Instruments |
6 / 9 page ® MPY534 6 Internal device tolerances make this relationship accurate to within approximately 25%. Some applications can benefit from reduction of the SF by this technique. The reduced input bias current and drift achieved by this technique can be likened to operating the input circuitry in a higher gain, thus reducing output contributions to these effects. Adjustment of the scale factor does not affect bandwidth. The MPY534 is fully characterized at V S = ±15V, but operation is possible down to ±8V with an attendant reduc- tion of input and output range capability. Operation at voltages greater than ±15V allows greater output swing to be achieved by using an output feedback attenuator (Figure 2). BASIC MULTIPLIER CONNECTION Figure 1 shows the basic connection as a multiplier. Accu- racy is fully specified without any additional user trimming circuitry. Some applications can benefit from trimming one or more of the inputs. The fully differential inputs facilitate referencing the input quantities to the source voltage com- mon terminal for maximum accuracy. They also allow use of simple offset voltage trimming circuitry as shown on the X input. The differential Z input allows an offset to be summed in V OUT. In basic multiplier operation, the Z2 input serves as the output voltage reference and should be connected to the ground reference of the driven system for maximum accu- racy. A method of changing (lowering) SF by connecting to the SF pin was discussed previously. Figure 2 shows another method of changing the effective SF of the overall circuit using an attenuator in the feedback connection to Z 1. This method puts the output amplifier in a higher gain and is thus accompanied by a reduction in bandwidth and an increase in output offset voltage. The larger output offset may be reduced by applying a trimming voltage to the high imped- ance input Z 2. The flexibility of the differential Z inputs allows direct conversion of the output quantity to a current. Figure 3 shows the output voltage differentially-sensed across a se- ries resistor forcing an output-controlled current. Addition of a capacitor load then creates a time integration function useful in a variety of applications such as power computa- tion. SQUARER CIRCUIT Squarer operation is achieved by paralleling the X and Y inputs of the standard multiplier circuit. Inverted output can be achieved by reversing the differential input terminals of either the X or Y input. Accuracy in the squaring mode is typically a factor of two better than the specified multiplier mode with maximum error occurring with small (less than 1V) inputs. Better accuracy can be achieved for small input voltage levels by using a reduced SF value. MPY534 X 1 +V S X 2 Out SF Z 1 Y 1 Z 2 Y 2 –V S –15V +15V Y Input ±10V FS ±12V PK X Input ±10V FS ±12V PK 470k Ω Optional Summing Input, Z, ±10V PK V OUT, ±12V PK = + Z 2 (X 1 – X2) (Y1 – Y2) 10V 50k Ω +15V –15V 1k Ω Optional Offset Trim Circuit MPY534 X 1 +V S X 2 Out SF Z 1 Y 1 Z 2 Y 2 –V S 10k Ω –15V +15V Y Input ±10V FS ±12V PK X Input ±10V FS ±12V PK 90k Ω V OUT, ±12V PK = (X 1 – X2) (Y1 – Y2) (Scale = 1V) Optional Peaking Capacitor C F = 200pF MPY534 X 1 +V S X 2 Out SF Z 1 Y 1 Z 2 Y 2 –V S –15V +15V Y Input ±10V FS ±12V PK X Input ±10V FS ±12V PK Current Sensing Resistor, R S, 2kΩ min Integrator Capacitor (see text) I OUT = x (X 1 – X2) (Y1 – Y2) 10V 1 R S FIGURE 3. Conversion of Output to Current. FIGURE 1. Basic Multiplier Connection. FIGURE 2. Connections for Scale-Factor of Unity. DIVIDER CIRCUIT The MPY534 can be configured as a divider as shown in Figure 4. High impedance differential inputs for the numera- tor and denominator are achieved at the Z and X inputs, respectively. Feedback is applied to the Y 2 input, and Y1 can be summed directly into V OUT. Since the feedback connec- tion is made to a multiplying input, the effective gain of the output op amp varies as a function of the denominator input voltage. Therefore, the bandwidth of the divider function is proportional to the denominator voltage (see Typical Perfor- mance Curves). |
Similar Part No. - MPY534 |
|
Similar Description - MPY534 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |