Document
CA3290, CA3290A
Data Sheet September 1998 File Number 1049.3
BiMOS Dual Voltage Comparators with MOSFET Input, Bipolar Output
The CA3290A and CA3290 types consist of a dual voltage comparator on a single monolithic chip. The common mode input voltage range includes ground even when operated from a single supply. The low supply current drain makes these comparators suitable for battery operation; their extremely low input currents allow their use in applications that employ sensors with extremely high source impedances. Package options are shown in the table below.
Features
• MOSFET Input Stage - Very High Input Impedance (ZIN) . . . . . . . . 1.7TΩ (Typ) - Very Low Input Current at V+ = 5V . . . . . . . 3.5pA (Typ) - Wide Common Mode Input Voltage Range (VICR) Can Be Swung 1.5V (Typ) Below Negative Supply Voltage Rail - Virtually Eliminates Errors Due to Flow of Input Currents • Output Voltage Compatible with TTL, DTL, ECL, MOS, and CMOS Logic Systems in Most Applications
Applications
• • • • • High Source Impedance Voltage Comparators Long Time Delay Circuits Square Wave Generators A/D Converters Window Comparators
Pinout
CA3290/A (PDIP) TOP VIEW
OUTPUT (A1) 1 INV. INPUT (A1) 2 NON-INV. INPUT (A1) 3 V- 4
A1
8 V+
+A2
7 OUTPUT (A2)
Schematic Diagram
(ONLY ONE IS SHOWN)
BIASING CIRCUIT FOR CURRENT SOURCES COMPARATOR NO. 1 V+
D1 D2 Q1 +VI -VI Q2 Q3
1
-+
6 INV. INPUT (A2) 5 NON-INV. INPUT (A2)
Ordering Information
PART NUMBER CA3290AE CA3290E TEMP RANGE (oC) -55 to 125 -55 to 125 PACKAGE 8 Ld PDIP 8 Ld PDIP PKG. NO. E8.3 E8.3
TO COMP. NO. 2
I1 Q9 50µA
I2 Q10 100µA
I3 50µA
I4 Q11 100µA Q12 VO D3 D4 Q4 Q8 Q15 Q17 R1 100kΩ Q7 R2 1kΩ Q18 Q16 Q13 Q14
Q5
Q6 R3 5kΩ C1 5pF
V-
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 321-724-7143 | Copyright © Intersil Corporation 1999
CA3290, CA3290A
Absolute Maximum Ratings
Supply Voltage Single Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +36V Dual Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±18V Differential Input Voltage . . . . . . . . . . . . . . . . 36V or [(V+ - V-) +5V] (whichever is less) DC Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . V+ +5V to V- -5V Output to V- Short Circuit Duration (Note 1) . . . . . . . . . .Continuous Input Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1mA
Thermal Information
Thermal Resistance (Typical, Note 2) θJA (oC/W) θJC (oC/W) PDIP Package . . . . . . . . . . . . . . . . . . . 120 N/A Maximum Junction Temperature (Plastic Package) . . . . . . . . .150oC Maximum Storage Temperature Range . . . . . . . . . . -65oC to 150oC Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300oC
Operating Conditions
Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to 125oC
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. Short circuits from the output to V+ can cause excessive heating and eventual destruction of the device. 2. θJA is measured with the component mounted on an evaluation PC board in free air.
Electrical Specifications
PARAMETER Input Offset Voltage
V- = 0V, Unless Otherwise Specified TEMP (oC) Full Full 25 25 CA3290A MIN VCM = 1.4V, V+ = 5V VCM = 0V, V+ = +15V, V- = -15V VCM = 1.4V, V+ = 5V VCM = 0V, V+ = +15V, V- = -15V Full Full 25 25 125 125 25 25 -55 -55 25 25 Full 25 25 88 TYP 4.5 8.5 4.0 4.0 8 2 7 2 7 2.8 13 3.5 12 0.85 1.62 0.8 1.35 150 103 800 118 MAX 10 10 28 28 25 25 45 45 40 40 1.0 3.0 1.4 3.0 MIN 25 88 CA3290 TYP 8.5 8.5 7.5 7.5 8 2 7 2 7 2.8 13 3.5 12 0.85 1.62 0.8 1.35 150 103 800 118 MAX 20 20 32 32 30 30 55 55 50 50 1.6 3.5 1.4 3.0 UNITS mV mV mV mV µV/oC nA nA pA pA nA nA pA pA mA mA mA mA V/mV dB V/mV dB
SYMBOL VIO
TEST CONDITIONS VCM = VO = 1.4V, V+ = 5V VCM = VO = 0V, V+ = +15V, V- = -15V VCM = VO = 1.4V, V+ = 5V VCM = VO = 0V, V+ = +15V, V- = -15V
Temperature Coefficient of Input Offset Voltage Input Offset Current
∆VIO/∆T IIO
Input Current
II
VCM = 1.4V, V+ = 5V VCM = 0V, V+ = +15V, V- = -15V VCM = 1.4V, V+ = 5V VCM = 0V, V+ = +15V, V- = -15V
Supply Current
I+
RL = ∞, V+ = 5V RL = ∞, V+ = 30V RL = ∞, V+ = 5V RL = ∞, V+ = 30V
Voltage Gain
AOL
RL = 15kΩ, V+ = +15V, V- = -15V RL = 15kΩ, V+ = +15V, V- = -15V
2
CA3290, CA3290A
Electrical Specifications
PARAMETER Saturation Voltage V- = 0V, Unless Otherwise Specified (Continued) TEMP (oC) 125 -55 25 Full Full 25 25 25 25 25 25 25 25 25 25 25 25 CA3290A MIN V+ -3.5 VV+ -3.8 V6 TYP 0.22 0.1 0.12 65 130 100 500 V+ -3.1 V- -1.5 V+ -3.4 V- -1.6 44 100 15 30 1.2 200 500 400 MAX 0.7 0.4 1k 562 562 316 MIN V+ -3.5 VV+ -3.8 V6 CA3290 TYP 0.22 0.1 0.12 65.