AD5522JSVD AD [Analog Devices], AD5522JSVD Datasheet - Page 32

• Manufacturer Part Number: AD5522JSVD
• Description: Quad Parametric Measurement Unit With Integrated 16-Bit Level Setting DACs
• Manufacturer: AD [Analog Devices]

AD5522
8
7
6
5
4
3
2
1
0
(LSB)
GUARD EN
GAIN1
GAIN0
TMP ENABLE
TMP1
TMP0
LATCHED
0
0
Guard enable. The Guard Amplifier is disabled on power on; write a “1” to enable it. Disabling the guard function if not in use saves
power (typically 400μA per Channel).
MEASOUT Output Range. The MEASOUT range defaults to the voltage force span for voltage and current measurements, this is
±11.25V, which includes some over range to allow for offset correction. The MEASOUT range may be reduced by using the GAIN0
and GAIN1 data bits. This allows for use of asymmetrical supplies and also for use of a smaller input range ADC.
Thermal Shutdown Function, TMP ENABLE, TMP1, TMP0
To disable the Thermal Shutdown feature, write a “0” to the TMP ENABLE bit (enabled by default). Bits TMP1 and TMP0 allow the
user to program the thermal shutdown temperature of operation.
Configure open drain CGALM as a latched or unlatched output pin. When high, this bit sets the CGALM alarm output as latched
outputs allowing it to drive a controller I/O without having to poll the line constantly. Default condition on power on is unlatched.
Unused bits. Set to 0.
MEASOUT Function
MV
MI
TMP ENABLE
0
1
1
1
1
1
GAIN0 = “0”
GAIN0 = “1”
TMP1
X
X
0
0
1
1
CURRENT MEAS GAIN = 10
CURRENT MEAS GAIN = 5
TMP0
X
X
0
1
0
1
Action
Thermal Shutdown Disabled
Thermal Shutdown Enabled
Shutdown at Junction Temp of 130°C
(Power On Default)
Shutdown at Junction Temp of 120°C
Shutdown at Junction Temp of 110°C
Shutdown at Junction Temp of 100°C
Rev. PrM | Page 32 of 48
GAIN1 = “0”V
MEASOUT Gain = 1
±VDUT (up to 11.25V)
±V
± V
RSENSE
RSENSE
X 10 = up to ±11.25V
X 5 = up to ±5.625
REF
= 5V
Preliminary Technical Data
GAIN1 = “1”
MEASOUT Gain = 1/5
0 to 4.5V
0 to 2.25V
0
to
4.5VREF
5