Datasheet CA3140, CA3140A (Intersil) - 18

CA3140, CA3140A R +15V 2 5k
Ω
+15V 0.1
µ
F 10k
Ω
7 SIMULATED R 0.1
µ
F 1 INPUT 3 + LOAD 7 2 - 10k
Ω
CA3140 6 CA3140 6 2 - 3 1N914 + 100pF 2k
Ω
4 4 5 10k
Ω
1 8 R3 PEAK 0.1
µ
F ADJUST 100k
Ω
-15V 10k
Ω
BW (-3dB) = 4.5MHz OFFSET SR = 9V/
µ
s ADJUST 2k
Ω R R GAIN 2 = ---- = X 3 = -------------- R R R
0.05
µ
F
+ R 1 1 2 3 2
FIGURE 28A. TEST CIRCUIT
X + X  R = --------- R 3  1 – X  1 5kΩ R FOR X = 0.5 ------- 2 = ---- 10kΩ R1   R = 10kΩ 0.75 ------ = 15kΩ 3  0.5  20VP-P Input BW (-3dB) = 290kHz, DC Output (Avg) = 3.2V
OUTPUT 0
Top Trace: Output; 50mV/Div., 200ns/Div. Bottom Trace: Input; 50mV/Div., 200ns/Div.
INPUT FIGURE 28B. SMALL SIGNAL RESPONSE 0 FIGURE 26. SINGLE SUPPLY, ABSOLUTE VALUE, IDEAL FULL WAVE RECTIFIER WITH ASSOCIATED WAVEFORMS +15V 0.01
µ
F R 7 S 3 + 1M
Ω
NOISE VOLTAGE CA3140 6 OUTPUT 2 - 4
(Measurement made with Tektronix 7A13 differential amplifier.)
30.1k
Ω
0.01
µ
F -15V
Top Trace: Output Signal; 5V/Div., 5µs/Div. Center Trace: Difference Signal; 5mV/Div., 5µs/Div.
BW (-3dB) = 140kHz 1k
Ω Bottom Trace: Input Signal; 5V/Div., 5µs/Div.
TOTAL NOISE VOLTAGE (REFERRED TO INPUT) = 48
µ
V (TYP) FIGURE 28C. INPUT-OUTPUT DIFFERENCE SIGNAL SHOWING SETTLING TIME FIGURE 27. TEST CIRCUIT AMPLIFIER (30dB GAIN) USED FOR WIDEBAND NOISE MEASUREMENT FIGURE 28. SPLIT SUPPLY VOLTAGE FOLLOWER TEST CIRCUIT AND ASSOCIATED WAVEFORMS
18 FN957.10 July 11, 2005