Datasheet

AD7879/AD7889
Rev. C | Page 3 of 40
SPECIFICATIONS
V
CC
= 1.6 V to 3.6 V, T
A
= −40°C to +85°C, unless otherwise noted.
Table 1.
Parameter Min Typ Max Unit Test Conditions/Comments
DC ACCURACY
Resolution 12 Bits
No Missing Codes 11 12 Bits
Integral Nonlinearity (INL)
1
±3 LSB LSB size = 390 µV.
Differential Nonlinearity (DNL)
1
LSB size = 390 µV.
Negative DNL −0.99 LSB
Positive DNL 2 LSB
Offset Error
1, 2
±2 ±6 LSB
Gain Error
1, 2
±4 LSB
Noise
3
70 µV rms
Power Supply Rejection
3
60 dB
Internal Clock Frequency 2 MHz
Internal Clock Accuracy 1.8 2.2 MHz
SWITCH DRIVERS
On Resistance
1
Y+, X+ 6 Ω
Y−, X− 5 Ω
ANALOG INPUTS
Input Voltage Range 0 V
CC
V
DC Leakage Current ±0.1 µA
Input Capacitance 30 pF
Accuracy 0.3 %
TEMPERATURE MEASUREMENT
Temperature Range −40 +85 °C
Resolution 0.3 °C
Accuracy
2
±2 °C Calibrated at 25°C.
BATTERY MONITOR
Input Voltage Range 0.5 5 V
Input Impedance
3
16 kΩ
Accuracy 2 5 % Uncalibrated accuracy.
LOGIC INPUTS (DIN, SCL, CS, SDA, GPIO)
Input High Voltage, V
INH
0.7 × V
CC
V
Input Low Voltage, V
INL
0.3 × V
CC
V
Input Current, I
IN
0.01 µA V
IN
= 0 V or V
CC
.
Input Capacitance, C
IN
3
10 pF
LOGIC OUTPUTS (DOUT, GPIO, SCL, SDA, INT)
Output High Voltage, V
OH
V
CC
− 0.2 V
Output Low Voltage, V
OL
0.4 V
Floating-State Leakage Current ±0.1 µA
Floating-State Output Capacitance
2
5 pF
CONVERSION RATE
3
Conversion Time 9.5 µs
Including 2 µs of acquisition time, MAV
filter off. 2 µs of additional time is required
if MAV filter is on.
Throughput Rate 105 kSPS