Datasheet

AD5381 Data Sheet
Rev. D | Page 4 of 40
SPECIFICATIONS
AD5381-5 SPECIFICATIONS
AVDD = 4.5 V to 5.5 V; DVDD = 2.7 V to 5.5 V, AGND = DGND = 0 V; external REFIN = 2.5 V; all specifications T
MIN
to T
MAX
,
unless otherwise noted.
Table 2.
Parameter AD5381-5
1
Unit Test Conditions/Comments
ACCURACY Output unloaded
Resolution 12 Bits
Relative Accuracy
2
(INL) ±1 LSB max
Differential Nonlinearity (DNL) ±1 LSB max Guaranteed monotonic over temperature
Zero-Scale Error 4 mV max
Offset Error ±4 mV max Measured at Code 8 in the linear region
Offset Error TC
±5
µV/°C typ
Gain Error ±0.05 % FSR max At 25°C
±0.06
% FSR max
T
MIN
to T
MAX
Gain Temperature Coefficient
3
2 ppm FSR/°C typ
DC Crosstalk
3
1 LSB max
REFERENCE INPUT/OUTPUT
Reference Input
3
Reference Input Voltage 2.5 V
±1% for specified performance, AVDD = 2 × REFIN + 50
mV
DC Input Impedance
1
MΩ min
Typically 100 MΩ
Input Current ±10 µA max Typically ±30 nA
Reference Range 1 to AVDD/2 V min/max
Reference Output
4
Enabled via CR8 in the AD5381 control register,
CR10 selects the reference voltage
Output Voltage 2.495/2.505 V min/max At ambient, optimized for 2.5 V operation. CR10 = 1
1.22/1.28 V min/max CR10 = 0
Reference TC ±10 ppm/°C max Temperature Range: +25°C to +85°C
±15 ppm/°C max Temperature Range: −40°C to +85°C
Output Impedance 800 Ω typ
OUTPUT CHARACTERISTICS
3
Output Voltage Range
2
0/AVDD V min/max
Short-Circuit Current 40 mA max
Load Current ±1 mA max
Capacitive Load Stability
R
L
= ∞ 200 pF max
R
L
= 5 kΩ 1000 pF max
DC Output Impedance 0.6 Ω max
MONITOR PIN
Output Impedance 1 kΩ typ
Three-State Leakage Current 100 nA typ
LOGIC INPUTS (EXCEPT SDA/SCL)
3
DVDD = 2.7 V to 5.5 V
V
IH
, Input High Voltage 2 V min
V
IL
, Input Low Voltage
DVDD > 3.6 V 0.8 V max
DVDD ≤ 3.6 V 0.6 V max
Input Current ±10 µA max Total for all pins; T
A
= T
MIN
to T
MAX
Pin Capacitance 10 pF max