Datasheet

AMC7823
www.ti.com SLAS453F –APRIL 2005–REVISED MARCH 2012
ELECTRICAL CHARACTERISTICS: +3V (continued)
At –40°C to +85°C, AV
DD
, DV
DD
, BV
DD
= 3V, using external 1.25V 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
AV
DD
= 2.7V, I
out
= 10mA 1.9 2 V
PRECISION_I_OUTPUT
Power-supply rejection ratio 60 dB
VOLTAGE REFERENCE (V
REF
)
Internal reference voltage
(5)
At +25°C 1.247 1.25 1.253 V
Internal reference drift –40°C to +85°C ±20 ppm/°C
Output impedance of pin EXT_REF_IN
10 kΩ
as internal reference output
Short-circuit current 125 μA
External reference voltage 1.20 1.28 V
External reference input resistance 10 kΩ
External reference input capacitance 5 pF
TEMPERATURE SENSOR
Temperature range –40 85 °C
Resolution 1.6 °C
Accuracy ±2.0 °C
LEVEL OF PIN GALR AND DAV
I
OH
= 0.3mA 2.4 DV
DD
V
I
OL
= 125μA 0 0.4 V
DIGITAL INPUT/OUTPUT, EXCEPT PIN GALR AND DAV
V
IH
I
IH
= 5μA 2.1 BV
DD
+ 0.3 V
V
IL
I
IL
= –5μA 0 0.6 V
Logic level
V
OH
I
OH
= –3mA 2.4 BV
DD
V
V
OL
I
OL
= 3mA 0 0.4 V
Input capacitance 5 pF
POWER SUPPLY REQUIREMENTS
AV
DD
2.70 3 3.3 V
Power-
supply DV
DD
2.70 3.3 V
voltage
BV
DD
(6)
2.70 3.3 V
In normal operation 10 15 mA
Quiescent current of AV
DD
All power-down 1 mA
Quiescent current of DV
DD
0.3 mA
Quiescent current of BV
DD
0.1 mA
Power dissipation 60 mW
TEMPERATURE RANGE
Specified performance –40 +85 °C
Storage –65 +150 °C
(5) Bit GREF in AMC Status/Configuration Register determines the internal reference voltage. GREF must be cleared when AV
DD
is less
than 5V and the internal reference is selected (see AMC Status/Configuration Register for details).
(6) BV
DD
must be not greater than AV
DD
or DV
DD
.
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