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ALD4211_05 Datasheet(PDF) 4 Page - Advanced Linear Devices

Part No. ALD4211_05
Description  CMOS LOW VOLTAGE HIGH SPEED QUAD PRECISION ANALOG SWITCHES
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Maker  ALD [Advanced Linear Devices]
Homepage  http://www.aldinc.com
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ALD4211/ALD4212
Advanced Linear Devices
4
ALD4213
AC ELECTRICAL CHARACTERISTICS
TA = 25Ā°C V+ = +5.0V, V- = GND = 0.0V unless otherwise specified
4211/4212/4213 (PC) 4211/4212/4213 (DC) 4211/4212/4213 (SC)
The ALD4211/ALD4212/ALD4213
feature very high
precision due to these factors:
1. The analog switch has ultra low capacitive charge coupling
so that the charge stored on a 200pF sampling capacitor
is minimally affected.
2. With special charge balancing and charge cancellation
circuitry designed on chip, the ALD4211/ALD4212/
ALD4213 achieves ultra low charge injection of typically
only 0.2pC resulting in extremely low signal distortion to
the external circuit.
3. The analog switch switching transistors have pA leakage
currents minimizing the droop rate of the sampling circuit.
4. The internal switch timing allows for the analog switch to
turn off internally without producing any residual transistor
channel charge injection, which may affect external
circuits. With a low loss polystyrene or polypropylene
sampling capacitor, long data retention times are possible
without significant signal loss.
The ALD4211/ALD4212/ALD4213 CMOS analog switches,
when used with industry standard pinout connection, have
the input and output pins reversed with the signal source
input connected to OUT pins and COM pins used as output
pins. In this connection and when used with 1,000pF or
greater value capacitors, or when connected to a DC current
or resistive load, the switch would not be operating in an ultra
low charge injection mode. Typical charge injection, in this
case, would be 5pC as the pin to pin capacitive coupling
effect would dominate. In this connection, all the other
characteristics of the ALD4211/ALD4212/ALD4213 CMOS
analog switches remain the same.
Parameter
Symbol
Min
Typ
Max
Min
Typ
Max
Min
Typ
Max
Unit
Test Conditions
Turn On
Delay time
tON
85
170
85
170
85
170
ns
(Note 7)
Turn Off
Delay time
tOFF
46
90
46
90
46
90
ns
(Note 7)
Break-Before-Make
Delay Time
tBD
15
40
15
40
15
40
ns
Charge Injection
QINJ
0.2
1.0
0.2
1.0
0.2
1.0
pC
(Note 3) (Note 4)
Off Isolation
75
75
75
dB
At f = 100KHz, (Note 5)
Crosstalk
90
90
90
dB
At f = 100KHz, (Note 6)
Total Harmonic
THD
0.05
0.05
0.05
%
RL = 10K
Distortion
0.01
0.01
0.01
RL = 100K
Com/Out
COM(OFF)
Off Capacitance
OUT(OFF)
3.0
3.0
3.0
pF
Channel On
CDS (ON)
5.7
5.7
5.7
pF
Capacitance
Pin to Pin
CPP
0.5
0.6
0.25
pF
Capacitance




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