Datasheet

AD7682/AD7689 Data Sheet
Rev. D | Page 6 of 32
VDD = 2.3 V to 5.5 V, VIO = 1.8 V to VDD, V
REF
= VDD, all specifications T
MIN
to T
MAX
, unless otherwise noted.
Table 3.
All Models/Grades
Parameter Conditions/Comments
Min Typ Max
Unit
INTERNAL REFERENCE
REF Output Voltage 2.5 V, @ 25°C 2.490 2.500 2.510 V
4.096 V, @ 25°C 4.086 4.096 4.106 V
REFIN Output Voltage
1
2.5 V, @ 25°C 1.2 V
4.096 V, @ 25°C 2.3 V
REF Output Current ±300 µA
Temperature Drift ±10 ppm/°C
Line Regulation VDD = 5 V ± 5% ±15 ppm/V
Long-Term Drift 1000 hours 50 ppm
Turn-On Settling Time C
REF
= 10 µF 5 ms
EXTERNAL REFERENCE
Voltage Range REF input 0.5 VDD + 0.3 V
REFIN input (buffered) 0.5 VDD − 0.5 V
Current Drain
2
250 kSPS, REF = 5 V 50 µA
TEMPERATURE SENSOR
Output Voltage
3
@ 25°C 283 mV
Temperature Sensitivity 1 mV/°C
DIGITAL INPUTS
Logic Levels
V
IL
−0.3 +0.3 × VIO V
V
IH
0.7 × VIO VIO + 0.3 V
I
IL
−1 +1 µA
I
IH
−1 +1 µA
DIGITAL OUTPUTS
Data Format
4
Pipeline Delay
5
V
OL
I
SINK
= +500 µA 0.4 V
V
OH
I
SOURCE
= −500 µA VIO − 0.3 V
POWER SUPPLIES
VDD Specified performance 2.3 5.5 V
VIO Specified performance 1.8 VDD + 0.3 V
Standby Current
6, 7
VDD and VIO = 5 V, @ 25°C 50 nA
Power Dissipation VDD = 2.5 V, 100 SPS throughput 1.7 µW
VDD = 2.5 V, 200 kSPS throughput 3.5 mW
VDD = 5 V, 250 kSPS throughput 12.5 18 mW
VDD = 5 V, 250 kSPS throughput with internal reference 15.5 21 mW
Energy per Conversion VDD = 5V 60 nJ
TEMPERATURE RANGE
8
Specified Performance T
MIN
to T
MAX
−40 +85 °C
1
This is the output from the internal band gap.
2
This is an average current and scales with throughput.
3
The output voltage is internal and present on a dedicated multiplexer input.
4
Unipolar mode: serial 16-bit straight binary.
Bipolar mode: serial 16-bit twos complement.
5
Conversion results available immediately after completed conversion.
6
With all digital inputs forced to VIO or GND as required.
7
During acquisition phase.
8
Contact an Analog Devices, Inc., sales representative for the extended temperature range.