Datasheet

AD5381 Data Sheet
Rev. D | Page 6 of 40
AD5381-3 SPECIFICATIONS
AVDD = 2.7 V to 3.6 V; DVDD = 2.7 V to 5.5 V, AGND = DGND = 0 V; external REFIN = 1.25 V;
all specifications T
MIN
to T
MAX
, unless otherwise noted.
Table 3.
Parameter AD5381-3
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 16 in the linear region
Offset Error TC ±5 µV/°C typ
Gain Error ±0.05 % FSR max At 25 °C
±0.1 % 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 1.25 V ±1% for specified performance
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 1.245/1.255 V min/max At ambient; optimized for 1.25 V operation; CR10 = 0
2.47/2.53 V min/max CR10 = 1
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 3.6 V
V
IH
, Input High Voltage
2
V min
V
IL,
Input Low Voltage
DVDD > 3.6 0.8 V max
DVDD ≤ 3.6 0.6 V max
Input Current ±1 µA max Total for all pins; T
A
= T
MIN
to T
MAX
Pin Capacitance 10 pF max
LOGIC INPUTS (SDA, SCL ONLY)
3
V
IH
, Input High Voltage 0.7 × DVDD V min SMBus compatible at DVDD < 3.6 V
V
IL
, Input Low Voltage 0.3 × DVDD V max SMBus compatible at DVDD < 3.6 V
I
IN
, Input Leakage Current
±1
µA max
V
HYST
, Input Hysteresis
0.05 × DVDD
V min
C
IN
, Input Capacitance 8 pF typ
Glitch Rejection 50 ns max Input filtering suppresses noise spikes of less than 50 ns