Datasheet

ManualsBrandsEvil Mad Scientist ManualsElectronic Experimentation741SE Discrete 741 Op-Amp Soldering Kit

XL741 and 741SE KitDatasheet (Rev 3.0, November 2019) 1

Design by Eric Schlaepfer (tubetime.us), working in

collaboration with Evil Mad Scientist Laboratories.

The latest version of this document and additional resources

about ‘741 op-amps are available at:!

https://wiki.evilmadscientist.com/741!

Main Speciﬁcations

• Kit type: Through-hole soldering kit (XL741) or!

Surface mount soldering kit (741SE)!

• Assembly instructions: Printed, included with kit!

• Function: Equivalent circuit to μa741 op-amp IC.!

Some performance characteristics differ; Refer to Abs.!

Maximum ratings and Electrical Characteristics!

• RoHS compliance: All kit components are RoHS!

compliant (lead free)!

• Connection methods: Terminal posts (bare wire, lug, !

or alligator clip) or solder!

XL741 & 741SE

Discrete Operational Ampliﬁers

Evil Mad Scientist Laboratories / evilmadscientist.com

1285 Forgewood Ave. Sunnyvale CA 94089

Questions? Please contact us: sales@evilmadscientist.com

DATASHEET

Connection Diagram / Pinout

Re-create one of the most classic, popular,

and all-around useful chips of all time.

The XL741 and 741SE Discrete Operational

Ampliﬁers are faithful and functional transistor-

scale replicas of the classic μa741 op-amp

integrated circuit.

Summary of content (9 pages)

PAGE 1
Evil Mad Scientist Laboratories / evilmadscientist.com 1285 Forgewood Ave. Sunnyvale CA 94089 Questions? Please contact us: sales@evilmadscientist.com DATASHEET XL741 & 741SE Discrete Operational Amplifiers Re-create one of the most classic, popular, and all-around useful chips of all time. The XL741 and 741SE Discrete Operational Amplifiers are faithful and functional transistorscale replicas of the classic μa741 op-amp integrated circuit. Design by Eric Schlaepfer (tubetime.
PAGE 2
Kit Contents:“XL741” Through-hole soldering kit Printed circuit board w/ threaded inserts. Aluminum Display Stand (2 pieces) Resistors Transistors Capacitor Diodes Screws and spacers for stand Thumbscrew terminal posts (color coded red, black, yellow, and gray) Contents of the XL741 kit: • The XL741 printed circuit board (extra thick 0.
PAGE 3
Kit Contents: “741SE” Surface-mount soldering kit Aluminum Display Stand Printed circuit board Screws and spacers for stand Threaded inserts for circuit board Thumbscrew terminal posts: color coded red, black, yellow, and gray Surface mount components: Resistors (1206 size), transistors (SOT-23), diodes, capacitor.
PAGE 4
Schematic Diagram DIFFERENTIAL AMPLIFIER Vcc+ 1 NC 1 BIAS GENERATOR GAIN STAGE OUTPUT STAGE J7 3 J8 Q8 ’3906 3 2 Q9 ’3906 2 1 3 3 Q12 ’3906 1 2 Q13 ’3906 2 1 1 1 2 1 1 1 2 2 J2 3 3 D1 BAT85 2 1 OFFSET 1 2 3 R9 1 24 Q18 ’3904 2 3 OUT R8 1 7.5k Q4 ’3906 R10 51 1 Q7 ’3904 2 3 1 J1 Q14 ’3904 3 1 2 1 C1 33 pF Q15 ’3904 R7 4.
PAGE 5
Parameter Supply Voltage, Positive2 Supply Voltage, Negative Differential Input Voltage3 Input Voltage (any input) 4 Notes: NA RY Absolute Maximum Ratings1 Symbol Value Unit VCC+ +18 V VCC- -18 V VID ±30 V VIN Lesser of VCC or ±15 V PR EL IM I 1. Exceeding Absolute Maximum Ratings may cause permanent damage to the device. Please refer to Electrical Characteristics for recommended operating parameters. 2. Input voltages are measured with respect to the midpoint between VCC+ and VCC- . 3.
PAGE 6
Electrical Characteristics Parameter NA RY At VCC = ± 15 V, TA = 25 °C (unless otherwise specified) Symbol Input Offset Voltage VIO Input Offset Current IIO Input Bias Current IIB Input Resistance ri Input Capacitance1 Ci Offset Voltage Adjustment Range Input Voltage Range (Common Mode) Common Mode Rejection Ratio1 Conditions RS ≤ 10 kΩ Typ Unit 2 mV 20 nA 80 nA 2 MΩ 10 pF ΔVIO(ADJ) ±15 mV VIR ±13 V CMRR RS ≤ 10 kΩ 43 dB ΔVIO/ΔVCC RS ≤ 10 kΩ 30 μV/V RL ≥ 2 kΩ, VOUT
PAGE 7
Block Diagram 7 VCC+ Bias Generator Inverting 2 Input Noninverting Input 3 _ + Diff Amp Gain Stage Output Stage Output 6 Offset Null 1 1 Offset Null 2 5 4 VCC– Example Circuits Voltage Follower (analog buffer): Vout = Vin Vin should be in range ±13 V. Inverting Amplifier Rf Ri Vin should be in range ±13 V. XL741 and 741SE Kit Datasheet (Rev 3.0, November 2019) Vout = - Vin Rf Ri • If Ri = Rf = 10 kΩ, then Gain = -1. • If Ri =10 kΩ, and Rf =20 kΩ then Gain = -2.
PAGE 8
XL741 Package information: Circuit board physical layout and mounting holes Terminal hole X8 • PCB in kit has 8-32 threaded insert (PEM #KF2-832-ET) pre-installed. • Bare PCB: .250” Thru Mounting hole X6 .145” Thru (#6 Clearance) Note: All dimensions are in INCHES. Additional physical specifications: • • • • • • • Printed Circuit Board size: 5.215 X 3.175 inches (13.25 X 8.06 cm) wide PCB thickness: 0.100" (2.54 mm) nominal, not including threaded inserts PCB thickness: 0.196" (4.
PAGE 9
741SE Package information: Circuit board physical layout and mounting holes Terminal hole X8 • 4-40 tapped hole with threaded insert installed. • Bare PCB: .166” Thru 2.047 1.774 1.734 741SE Mounting hole X4 .126” Thru (M3 Clearance) with 90° countersink .313 .274 .000 2.559 2.255 1.930 1.605 .955 .630 .305 .000 Note: All dimensions are in INCHES. Additional physical specifications: • • • • • • • Printed Circuit Board size: 2.559 X 2.047 inches (6.50 X 5.20 cm) wide PCB thickness: 0.062” (1.