HA-2420, HA-2425
Typical Performance Curves
1000
100
10
DRIFT DURING HOLD MIN. SAMPLE TIME
AT 25oC (mV/s)
FOR 0.1% ACCURACY
10V SWINGS (µs)
UNITY GAIN PHASE
MARGIN (DEGREES)
HOLD STEP
OFFSET
ERROR (mV)
1000
OUTPUT NOISE
“HOLD” MODE
100
EQUIV. INPUT NOISE
“SAMPLE” MODE - 100kΩ
SOURCE RESISTANCE
1.0
UNITY GAIN
BANDWIDTH
(MHz)
0.1
SLEW RATE
(V/µs)
0.01
10pF
100pF
1000pF 0.01µF
CH VALUE
0.1µF
1.0µF
FIGURE 10. TYPICAL SAMPLE AND HOLD PERFORMANCE
AS A FUNCTION OF HOLDING CAPACITOR
10
EQUIV. INPUT NOISE
“SAMPLE” MODE - 0Ω
SOURCE RESISTANCE
1
10
100
1K
10K
100K
1M
BANDWIDTH (LOWER 3dB FREQUENCY = 10Hz)
FIGURE 11. BROADBAND NOISE CHARACTERISTICS
1000
100
10
1
-50 -25
0
25
50
75
TEMPERATURE (oC)
100 125
FIGURE 12. DRIFT CURRENT vs TEMPERATURE
100
90
80
70
60
50
40
30
20
10
0
-10
-20
-30
10
CH = 1.0µF
CH = 0.1µF
100
1K
CH = 100pF
CH = 1000pF
CH = 0.01µF
10K 100K 1M 10M 100M
FREQUENCY (Hz)
FIGURE 13. OPEN LOOP FREQUENCY RESPONSE
-30
CH = 1000pF
-40
-50
-60
-70
-80
0
CH = 0.01µF
20
CH = 1000pF
40
CH ≤ 100pF
60
80
100
CH = 0.1µF
120
140
160
180
CH = 1.0µF
200
-90
220
100
1K
10K
100K
1M
10M
±10V SINUSOIDAL INPUT FREQUENCY (Hz)
240
10
100
1K 10K 100K 1M 10M 100M
FREQUENCY (Hz)
FIGURE 14. HOLD MODE FEED THROUGH ATTENUATION
FIGURE 15. OPEN LOOP PHASE RESPONSE
4V
S/H
CONTROL
SAMPLE
HOLD
0V
8