Datasheet

AMC7823
SLAS453F –APRIL 2005–REVISED MARCH 2012 www.ti.com
ELECTRICAL CHARACTERISTICS: +5V (continued)
At –40°C to +85°C, AV
DD
= 5V, DV
DD
= 5V, BV
DD
= 3V to 5V, using external 2.5V reference, unless otherwise noted.
AMC7823
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
PRECISION CURRENT SOURCE
Output current range 0.01 10 mA
Output current accuracy I
out
= 100μA 99.5 100.0 100.5 μA
Output current drift I
out
= 100μA 40 ppm/°C
Output impedance I
out
= 100μA 100 MΩ
Compliance voltage of pin
I
out
= 10mA 3 4.25 V
PRECISION_I_OUTPUT
Power-supply rejection ratio 60 dB
VOLTAGE REFERENCE (V
REF
)
Internal reference voltage
(5)
At +25°C 2.495 2.50 2.505 V
Internal reference drift –40°C to +85°C ±15 ppm/°C
Output impedance of pin EXT_REF_IN
10 kΩ
as internal reference output
Short-circuit current 250 μA
External reference voltage 1.20 2.55 V
Internal reference selected 10 kΩ
External reference input resistance
Internal reference de-selected 1 MΩ
External reference input capacitance 5 pF
TEMPERATURE SENSOR
Temperature range –40 +85 °C
V
REF
= 2.5V +3.2 °C
Resolution
V
REF
= 1.25V +1.6 °C
V
REF
= 2.5V ±4 °C
Accuracy
V
REF
= 1.25V ±2.0 °C
LEVEL OF PIN GALR AND DAV
I
OH
= 0.7mA 2.4 BV
DD
V
I
OL
= 180μA 0 0.4 V
DIGITAL INPUT/OUTPUT, EXCEPT PIN GALR AND DAV
V
IH
BV
DD
= 5V, I
IH
= 5μA 3.5 BV
DD
+ 0.3 V
V
IL
BV
DD
= 5V, I
IL
= –5μA 0 0.8 V
Logic level
V
OH
BV
DD
= 5V, I
OH
= –3mA 4 BV
DD
V
V
OL
BV
DD
= 5V, I
OL
= 3mA 0 0.4 V
V
IH
BV
DD
= 3V, I
IH
= 5μA 2.1 BV
DD
+ 0.3 V
V
IL
BV
DD
= 3V, I
IL
= –5μA 0 0.6 V
Logic level
V
OH
BV
DD
= 3V, I
OH
= –3mA 2.4 BV
DD
V
V
OL
BV
DD
= 3V, I
OL
= 3mA 0 0.4 V
Input capacitance 5 pF
(5) Bit GREF in AMC Status/Configuration Register determines the internal reference voltage. The internal V
REF
= 2.5V when GREF = 1,
and the internal V
REF
= 1.25V when GREF = 0 (see AMC Status/Configuration Register for details).
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