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AD7294 Datasheet(PDF) 4 Page - Analog Devices

Part No. AD7294
Description  12-Bit, Multichannel, DAC/ADC Temperature Sensor and Current Sense for Monitor and Control Applications
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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AD7294 Datasheet(HTML) 4 Page - Analog Devices

 
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AD7294
Preliminary Technical Data
Rev. PrB | Page 4 of 45
ADC SPECIFICATIONS1
AVDD = DVDD 4.5 V to 5.5 V, AGND = DGND= 0 V, external 2.5 V reference. Temperature range for B version: −40°C to +105°C. All
specifications TMIN to TMAX, unless otherwise noted.
Parameter
Min
Typ
Max
Unit
Test Conditions / Comments
ACCURACY
Resolution
12
Bits
Integral Nonlinearity (INL)
±0.5
±1
LSB
Differential Mode
Single Ended or Pseudo-Differential
Mode
Differential Nonlinearity (DNL)
±1
LSB
Differential Mode
Single Ended or Pseudo-Differential
Mode
Offset Error
±3
LSB
Gain Error
±2
LSB
Total Unadjusted Error (TUE)
TBD
LSB
Conversion Rate
3
μS
Analog Input Range
0
VREF or 2 VREF
V
Input Capacitance
30
pF
DC Input Leakage Current
±1
µA
TEMPERATURE SENSOR
Accuracy
±2
°C
External temperature sensors × 2
TA = −10°C to +90°C
Accuracy
±2
°C
Internal temperature sensor
TA = −10°C to +90°C
Resolution
11
Bits
0.25 °C LSB size
Low Level Output Current Source
8
µA
Medium Level Output Current
Source
32
µA
High Level Output Current Source
128
µA
CURRENT SENSE
Common-Mode Input Range
AVDD
48
V
±200 mV Full Scale Voltage
Full-Scale Sense Voltage
200
mV
RS(+) and RS(−) Input Bias Current
25
µA
CMRR / PSRR
80
dB
Pin connected to power supply
Maximum Series Resistance for
external diode
10
k Ω
Gain
±1
% FS
TA = TMIN to TMAX
Accuracy
Offset
Bandwidth
300
kHz
Amplifier Equivalent RMS Noise
0.8
LSB
60 µV RMS referred to input
REFERENCE
Reference Output Voltage
2.49
2.51
V
Reference Input Voltage Range
0.1
2.5
V
DC Leakage Current
±30
µA
Input Capacitance
20
pF
VREF Output Impedance
25
Reference Temperature Coefficient
25
ppm/°C
10 ppm/°C typ


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