CA3100

January 1999

CA3100

38MHz, Operational Amplifier

Features

• High Open Loop Gain at Video

Frequencies . . . 42dB (Typ) at 1MHz

• Unity Gain

Crossover Frequency (f _T ) . . . 38MHz (Typ)

• Full Power Bandwidth

V O = 18V _P-P . . . 1.2MHz (Typ)

• Slew Rate

- 20dB Amplifier . . . 70V/ µ s (Typ) - Unity Gain Amplifier. . . 25V/ µ s (Typ)

• Settling Time . . . 0.6 µ s (Typ)

• Output Current . . . . ± 15mA (Min)

• Single Capacitor Compensation

• Offset Null Terminals

Applications

• Video Amplifiers

• Fast Peak Detectors

• Meter Driver Amplifiers

• High Frequency Feedback Amplifiers

• Video Pre-Drivers

• Oscillators

• Multivibrators

• Voltage Controlled Oscillator

• Fast Comparators

Description

The CA3100 is a large signal wideband, high speed operational amplifier which has a unity gain cross over frequency (f _T ) of approximately 38MHz and an open loop, 3dB corner frequency of approximately 110kHz. It can operate at a total supply voltage of from 14V to 36V ( ± 7V to

± 18V when using split supplies) and can provide at least 18V _P-P and 30mA _P-P at the output when operating from

± 15V supplies. The CA3100 can be compensated with a single external capacitor and has DC offset adjust terminals for those applications requiring offset null. (See Figure 1).

The CA3100 circuit contains both bipolar and PMOS transis- tors on a single monolithic chip.

Pinouts

Part Number Information

PART NUMBER (BRAND)

TEMP.

RANGE (

^o

C) PACKAGE

PKG.

NO.

CA3100E -40 to 85 8 Ld PDIP E8.3

CA3100M (3100)

-40 to 85 8 Ld SOIC M8.15

CA3100T -55 to 125 8 Pin Metal Can T8.C

CA3100 (PDIP, SOIC)

TOP VIEW

CA3100 (METAL CAN)

TOP VIEW

1 2 3 4

8 7 6 5 OFFSET

NULL INV.

INPUT NON-INV.

INPUT V-

V+

OUTPUT OFFSET NULL PHASE COMPENSATION

-

+

V+

2

4 6 1

3

7

5 8

-

+ PHASE

COMP TAB

OUTPUT

OFFSET NULL NON-INV.

INPUT INPUTINV.

V- PHASE

COMP AND OFFSET NULL

[ /Title (CA31 00) /Sub- ject (38MH z, Opera- tional Ampli- fier) /Autho r () /Key- words (Har- ris Semi- con- ductor, single, opera- tional ampli- fier, op amp, gen- eral pur- pose, indus- trial mili- tary

OBSOLETE PR

ODUCT

POSSIBLE SUBSTITUTE PR

ODUCT

HA-2525

Absolute Maximum Ratings Thermal Information

Supply Voltage (Between V+ and V- Terminals) . . . 36V Differential Input Voltage. . . 12V Input Voltage to Ground . . . V+ to V- Offset Terminal to V- Terminal Voltage . . . .

±

0.5V Output Current (Note 2) . . . 50mA

Operating Conditions

Temperature Range

CA3100E, CA3100M. . . -40

^o

C to 85

^o

C CA3100T. . . -55

^o

C to 125

^o

C

Thermal Resistance (Typical, Note 1)

θJA

(

^o

C/W)

θJC

(

^o

C/W) PDIP Package . . . . 100 N/A SOIC Package . . . . 165 N/A Metal Can Package . . . . 170 85 Maximum Junction Temperature (Metal Can) . . . 175

^o

C Maximum Junction Temperature (Plastic Package) . . . 150

^o

C Maximum Storage Temperature Range . . . -65

^o

C to 150

^o

C Maximum Lead Temperature (Soldering 10s) . . . 300

^o

C

(SOIC - Lead Tips Only)

CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.

NOTES:

1.

θ_JA

is measured with the component mounted on an evaluation PC board in free air.

2. CA3100 does not contain circuitry to protect against short circuits in the output.

Electrical Specifications T

_A

= 25

^o

C, V

_SUPPLY= ±

15V, Unless Otherwise Specified

PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS

DC

Input Offset Voltage V

_IO

V

_O

= 0

±0.1V

-

±1 ±5

mV

Input Bias Current I

_IB

V

_O

= 0

±1V

- 0.7 2

µA

Input Offset Current I

_IO

V

_O

= 0

±1V

-

±0.05 ±0.4 µA

Common Mode Input Voltage Range V

_lCR

CMRR

≥

76dB

±12

+14

-13

- V

Common Mode Rejection Ratio CMRR V

_CM

=

±12V

76 90 - dB

Maximum Output Voltage V

_OM

+ Differential Input Voltage = 0

±0.1V,

R

_L

= 2kΩ +9 +11 - V

V

_OM

- -9 -11 - V

Maximum Output Current I

_OM

+ Differential Input Voltage = 0 + 0.1V,

R

_L

= 250Ω +15 +30 - mA

I

_OM

- -15 -30 - mA

Supply Current I+ V

_O

= 0

±0.1V, R_L≥ 10kΩ

- 8.5 10.5 mA

Power Supply Rejection Ratio PSRR

∆V+ =±1V,∆V- =±1V

60 70 - dB

DYNAMIC

Unity-Gain Crossover Frequency f

_T

C

_C

= 0, V

_O

= 0.3V

_P-P

- 38 - MHz

Open Loop Voltage Gain A

_OL

f = 1kHz, V

_O

=

±1V, (Note 3)

56 61 - dB

f = 1MHz, C

_C

= 0, V

_O

= 10V

_P-P

36 42 - dB

Slew Rate SR A

_V

= 10, C

_C

= 0, V

_I

= 1V (Pulse) 50 70 - V/µs

A

_V

= 1, C

_C

= 10pF, V

_I

= 10V (Pulse) - 25 - V/µs

Full Power Bandwidth (Note 4) FPBW A

_V

= 10, C

_C

= 0, V

_O

= 18V

_P-P

0.8 1.2 - MHz

Wideband Noise Voltage (RTI) e

_N

(Total) BW = 1MHz, R

_S

= 1kΩ - 8 -

µV_RMS

Settling Time (To Within

±50mV of 9V

Output Swing) tS R

_L

= 2kΩ, C

_L

= 20pF - 0.6 -

µs

NOTES:

3. Low frequency dynamic characteristic.

4. .

Electrical Specifications T

_A

= 25

^o

C, V

_SUPPLY= ±

15V, Unless Otherwise Specified (Continued)

PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS

Full Power Bandwidth Slew Rate

π

V

_{O P–P} ---

=

Test Circuits

FIGURE 1. OPEN-LOOP VOLTAGE GAIN TEST CIRCUIT AND OFFSET ADJUST CIRCUIT

FIGURE 2. SLEW RATE IN 10X AMPLIFIER TEST CIRCUIT

FIGURE 3. FOLLOWER SLEW RATE TEST CIRCUIT FIGURE 4. WIDEBAND INPUT NOISE VOLTAGE TEST CIRCUIT

+

-

CA3100 7

4

8 5

V_O V+

2

1 3

R_X 6

V-

20pF 2kΩ

WITH V_I = 0 ADJ POTENTIO- TO GIVE METER (R_X) V_O = 0± 0.1VDC

AT FREQUENCY > 1MHz V_I AND V_OMEASURED WITH HF8405A VECTOR NULL ADJUST

POTENTIOMETER SET V_I TO GIVE

DESIRED V_O LEVEL AT TEST FREQUENCY

C_C

0.1µF HP606A

OR EQUIV

51Ω

A_OL = V_O V_I θOL 0.1µF

V_I

10kΩ

VOLTMETER

V_O V+

2

4 6

20

2kΩ 0.1

+1V PULSE

t_R≤ 10ns 51Ω

0.1µF V_I

7

+

-

CA3100 3

µF pF t_WIDTH

≥1µs

SLOPE = SR

220Ω

V- 2kΩ

V_O V+

2 +10V 5

PULSE t_R≤ 10ns

51Ω

0.1µF V_I

+

-

CA3100 3

SLOPE = SR

V- 4 7 1

3 10pF

0.1µF 500pF

2kΩ 6

t_WIDTH ≥1µs

+15V

2

4 6

0.1µF 0.1µF 7

+

-

CA3100 3

A_V = 100

47Ω

-15V 420Ω

POST AMPL. AND 2 POLE 1MHz

FILTER

HP400EL VTVM

e_NO INPUT REFERRED

NOISE VOLTAGE e_NI =e_NO

100

R_S

Schematic Diagram

FIGURE 5. OUTPUT VOLTAGE SWING (V

_OM

), OUTPUT CURRENT SWING (I

_OM

) TEST CIRCUIT

FIGURE 6. SETTLING TIME TEST CIRCUIT

Test Circuits (Continued)

2

4

6

1kΩ

7

+

-

CA3100 3

1kΩ

-15V

V_OM 9.1kΩ

R_L 2kΩ

±1V

+15V R_L = 250Ω FOR I_OM TEST I_OM = V_O

250Ω

+

-

CA3100 7

4

1 8

-15V +15V

3

6 1pF

2kΩ

0.1µF

V_O =±9V

0.1 20pF 1kΩ µF

12pF

2kΩ 2kΩ

2kΩ

51Ω

SETTLING POINT TO SCOPE V_I =±9V

2

3

2

4

Q₃ V+

Q₄ R₁

2.5kΩ

C₁ 10pF D₂

D₃

Q₁₃

OUTPUT

PHASE COMP Q₈

Q₆ Q₅

Q₁

Q₇

Q₉

R₉ 200Ω Q₁₈ R₈

200Ω

R₁₇ 600Ω

R₁₉ 600Ω

R₁₈

150Ω OFFSET

NULL AND PHASE COMP

OFFSET D₅ NULL

Q₁₇ Q₁₆

6 8

5 1 7 R₅

750Ω R₄

R₆ 750Ω 12kΩ

NON- INVERT INPUT +

Q₁₂ Q₁₅ Q₁₄

Q₁₁

R₁₀ 20Ω

R₁₁ 20Ω

Q₂₃

Q₂₁ Q₂₂

Q₂₀

R₁₂ 50Ω

R₁₄ R₁₃ 20Ω

Q₁₉

R₁₅ 1.1kΩ

R₁₆ 150Ω R₇

10kΩ

-

INVERT INPUT

D₄ Q₁₀

Q₂

1.1kΩ V-

Typical Applications

FIGURE 7. 20dB VIDEO AMPLIFIER FIGURE 8. 20dB VIDEO LINE DRIVER

FIGURE 9. FAST POSITIVE PEAK DETECTOR FIGURE 10. 1MHz METER-DRIVER AMPLIFIER

Typical Performance Curves

FIGURE 11. OPEN LOOP GAIN, OPEN LOOP PHASE SHIFT vs FREQUENCY

FIGURE 12. OPEN LOOP GAIN vs FREQUENCY

2

+

-

CA3100

3kΩ

-15V

6

4 3

+15V

7

INPUT 0.33µF 0.1µF

OUTPUT

220Ω 2kΩ

3pF

0.1µF

-3dB BANDWIDTH≈20MHz TOTAL INPUT NOISE VOLTAGE REFERRED TO INPUT≈35µV_RMS

2 +

-

CA3100

-15V

0.1µF

OUTPUT TO 3

6

4 7 +15V

3pF 3kΩ 220Ω

0.33µF INPUT

4.7

2N5320

2N5322 TERMINATED

50Ω TRANS- MISSION LINE kΩ

220Ω

2kΩ 0.1µF

1N5393 10Ω

10Ω DELIVERS FOLLOWING

PEAK VOLTAGES TO 50Ω LINE:

FREQ 1MHz 2MHz4MHz 6MHz

V_O 8V 5V2V

1V GAIN = 20dB 3dB BANDWIDTH = 15MHz A_CL = 20dB

2 +

-

CA3100

0.1µF 7

4

6 3

V_I(AC)

3kΩ

1.2kΩ

-15V +15V

1000pF 1N914

2N2102

V_O(DC) = +V_I PEAK 0.1µF

2 +

-

CA3100 8

4

6 3

+15V

1mA 1N914 0.1µF

1 7

FULL SCALE -15V 250Ω POT. 330Ω

FULL SCALE CALIBRATION ADJUST TEST

LEADS INPUT IMPEDANCE

≈ 50kΩ

51kΩ ZERO ADJ 20kΩ

200Ω

10pF

1V_RMS 51kΩ

+

-

0.1µF

FULL SCALE

DC METER

12pF

24pF

12pF C_C = 24pF

12pF

T_A = 25^oC V_S =±15V R_L = 2kΩ C_L = 20pF

0pF 70

60 50 40 30 20 10 0

OPEN LOOP VOLTAGE GAIN (dB)

0.001 0.01 0.1 1 10 100

FREQUENCY (MHz)

-270 -225 -180 -135 -90 -45 0

OPEN LOOP PHASE SHIFT (DEGREES)

80

|A_OL|

0pF

θ 0pF

C_C = 24pF

V_S =±15V R_L = 2kΩ C_C = 0

25^oC 125^oC

T_A = -55^oC

0.001 0.01 0.1 1 10 100

FREQUENCY (MHz) 70

60

50

40

30

20

10

0

OPEN LOOP VOLTAGE GAIN (dB)

FIGURE 13. OPEN LOOP GAIN vs FREQUENCY FIGURE 14. REQUIRED COMPENSATION CAPACITANCE vs CLOSED LOOP GAIN

FIGURE 15. SLEW RATE vs COMPENSATION CAPACITANCE FIGURE 16. TYPICAL OPEN LOOP OUTPUT IMPEDANCE vs FREQUENCY

Typical Performance Curves (Continued)

OPEN LOOP VOLTAGE GAIN (dB)

±12V±10V

±7V

V_S =±18V 70

60

50

40

30

20

10

0

0.001 0.01 0.1 1 10 100

FREQUENCY (MHz)

T_A = 25^oC R_L = 2kΩ C_L = 20pF C_C = 0

T_A = 25^oC R_L = 2kΩ C_L = 20pF

V_S =±15V

±10V 25

20

5 10 15

0 6 (0) 10 (6) 20 (19.1)

NONINVERTING GAIN (dB), INVERTING GAIN (dB) CLOSED LOOP GAIN (dB)

COMP CAP PINS 1 TO 8 (pF)

0

T_A = 25^oC R_L = 2kΩ C_L = 20pF

±10V

V_S =±15V

0 5 10 15 20 25

COMP CAP PINS 1 TO 8 (pF)

SLEW RATE (V/µs) 80

60

40

20

350 300

200

100

0 10 20 30 40

FREQUENCY (MHz)

OPEN LOOP OUTPUT IMPEDANCE (Ω) T_A = 25^oC

V_S =±15V

+

-

CA3100 7

4

1 5

6 V_O

HEWLETT PACKARD VECTOR IMPEDANCE METER4815A

-15V 10

+15V

K 3

2

30

20

10

0

10² 10³ 10⁴

TOTAL INPUT REFERRED NOISE VOLTAGE (µVRMS)

T_A = 25^oC BW AT 6dB = 1MHz

10⁶

10⁵

10⁴

10³

0.1 1 10 100

T_A = 25^oC V_S =±15V

OPEN LOOP DIFFERENTIAL INPUT IMPEDANCE (Ω)

FIGURE 19. MAXIMUM OUTPUT VOLTAGE SWING vs FREQUENCY

FIGURE 20. COMMON MODE INPUT VOLTAGE RANGE vs SUPPLY VOLTAGE

FIGURE 21. MAXIMUM OUTPUT VOLTAGE vs SUPPLY VOLTAGE FIGURE 22. SUPPLY CURRENT vs SUPPLY VOLTAGE

FIGURE 23. INPUT BIAS CURRENT vs SUPPLY VOLTAGE

Typical Performance Curves (Continued)

25

20

15

10

5

0

0.01 0.1 1 10 100

FREQUENCY (MHz)

CIRCUIT FIG. 2 10X AMPL CIRCUIT FIG. 3

(FOLLOWER)

T_A = 25^oC V_S =±15V

OUTPUT VOLTAGE (VP-P)

15.0

12.5

10.0

7.5

5.0

2.5

0 ±2.5 ±5 ±7.5 ±10 ±12.5 ±15 ±17.5 ±20 SUPPLY VOLTAGE (V)

COMMON MODE INPUT VOLTAGE RANGE (V)

+V_ICR -V_ICR

T_A = 25^oC

0

15

12.5

10

7.5

5

2.5

0 ±2.5 ±5 ±7.5 ±10 ±12.5 ±15 ±17.5 ±20 SUPPLY VOLTAGE (V)

V_OM+ V_OM-

T_A = 25^oC

MAXIMUM OUTPUT VOLTAGE (V)

0

15

12.5

10

7.5

5

2.5

0 ±2.5 ±5 ±7.5 ±10 ±12.5 ±15 ±17.5 ±20 SUPPLY VOLTAGE (V)

T_A = 25^oC

SUPPLY CURRENT (mA)

0

15.0

12.5

10.0

7.5

5.0

2.5

0 ±2.5 ±5 ±7.5 ±10 ±12.5 ±15 ±17.5 ±20 SUPPLY VOLTAGE (V)

T_A = 25^oC

INPUT BIAS CURRENT (µA)

0