Datasheet

MAX9934
High-Precision, Low-Voltage, Current-Sense Amplifier
with Current Output and Chip Select for Multiplexing
4
Maxim Integrated
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
0.1% final value, Figure 1, MAX9934T 670
Output Settling Time t
S
0.1% final value, Figure 1, MAX9934F 220
µs
Output to 0.1% final value, Figure 2,
MAX9934T
150
Output Select Time t
ZH
Output to 0.1% final value, Figure 2,
MAX9934F
80
µs
Output Deselect Time t
HZ
Output step of 100mV, C
L
= 10pF,
Figure 2
2µs
Power-Down Time t
PD
Output step of -100mV, C
L
= 10pF,
V
CC
> 2.5V
2µs
0.1% final value, Figure 3, MAX9934T 300
Power-Up Time t
PU
0.1% final value, Figure 3, MAX9934F 200
µs
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 3.3V, V
RS+
= V
RS-
= 3.0V, V
SENSE
= 0V, V
CM
= (V
RS+
+ V
RS-
)/2, V
CS
= 3.3V, R
OUT
= 10kΩ to GND for unidirectional opera-
tion, R
OUT
= 10kΩ to V
CC
/2 for bidirectional operation. T
A
= -40°C to +125°C, unless otherwise noted. Typical values are at T
A
=
+25°C.) (Note 2)
Note 2: All devices are 100% production tested at T
A
= +25°C. Unless otherwise noted, specifications overtemperature are guaran-
teed by design.
Note 3: Guaranteed by design. Thermocouple, contact resistance, RS- input-bias current, and leakage effects preclude measure-
ment of this parameter during production testing. Devices are screened during production testing to eliminate defective
units.
Note 4: Gain error tested in unidirectional mode: 0.2V ≤ V
OUT
≤ 3.1V for the MAX9934T; 0.25V ≤ V
OUT
≤ 2.5V for the MAX9934F.