Datasheet
Sample and Hold Parameters
(V
MIRIN
= 15V to 76V, V
CC
= 2.85V to 3.63V, T
A
= -40°C to +95°C, R
ISRC
= 30kΩ, DISCHARGE = high, unless otherwise noted.)
(Note 1)
Note 1: Limits are 100% tested at T
A
= +25°C. Limits over the operating temperature range and relevant supply voltage rating are
guaranteed by design and characterization.
Note 2: ISRC/SHDN is not connected; HV FET is driven by a 100Ω source at 250kHz with a 2.97V square wave; HVD is connected
to GND.
Note 3: External resistor connected to GND. This value guarantees accuracy of DS3923. I
ISRC
= (6/R
ISRC
) ±6%.
Note 4: Resistor connected to RLIM for 1mA clamp limit. I
MIROUT
step from 10μA to 10mA. Time measured from I
MIROUT
step to
I
MIROUT
< 1.1mA (see the Typical Application Circuit). C3 = 47pF, C1 = C2 = 0.1μF, V
VC1
= 30V; R1 = 100Ω.
Note 5: Output Error = VOP – 4 x (VIP1 or VIP2) and sampled at t
OUT
. Measured at +25°C with offset removed.
Note 6: To change internal gain selection, external driver must be capable of meeting the GAIN input logic level with the GAIN
impedance connected to either V
CC
or GND.
Note 7: See Figure 1 for more detail on timing.
Note 8: Time referenced to SENINT falling edge when output is valid at VOP - VON if DIFFEN = High or VOP if DIFFEN = Low.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Output Error (Total Error from All
Sources)
V
ERR
I
MIROUT
from 600µA to 60uA
(Note 5)
±5.5
%
I
MIROUT
from 20µA to 500µA
(Note 5)
-9.0 +9.0
Output Voltage V
OUT
V
OUT
= V
VOP
- V
VON
,
100kΩ output load
0 2.5 V
Output Voltage Common Mode V
OUTCM
V
DIFFEN
= High
1.4
V
Output Impedance R
OUT
1
kΩ
VOP Output Capacitive Load C
LD
Capacitance for stable operation 50 pF
Gain Selection Threshold V
GTHR
320 400 460
mV
GAIN Impedance R
G
(Note 6) 2.1 3.5 4.9 kΩ
Sample Time t
S
1kΩ resistors connected to VIP1
and VIP2 (Note 7)
300 ns
Delay Time t
DEL
(Note 7) 10 ns
Output Valid Time t
O_VAL
Less than 1% change from the
time the output is valid, C
LD
=
50pF (Notes 7 and 8)
9 109 µs
DS3923 High-Speed Current Mirror
with Sample/Hold Output
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