Datasheet

AD7986
Rev. B | Page 4 of 28
AVDD = DVDD = 2.5 V, BVDD = 5 V, VIO = 1.8 V to 2.7 V, V
REF
= 4.096 V, T
A
= −40°C to +85°C, unless otherwise noted.
Table 3.
Parameter Conditions Min Typ Max Unit
INTERNAL REFERENCE PDREF = low
Output Voltage T
A
= 25°C 4.081 4.096 4.111 V
Temperature Drift −40°C to +85°C ±10 ppm/°C
Line Regulation AVDD = 2.5 V ± 5% ±50 ppm/V
Turn-On Settling Time C
REF
= 10 μF, C
REFBUFIN
= 0.1 μF 220 ms
REFIN Output Voltage REFIN @ 25°C 1.2 V
REFIN Output Resistance 7.5 kΩ
EXTERNAL REFERENCE PDREF = high, REFIN = low
Voltage Range 2.4 5.1 V
Current Drain 2 MSPS, V
REF
= 5.0 V 500 µA
REFERENCE BUFFER
REFIN Input Voltage Range 1.2 V
REFIN Input Current 160 µA
DIGITAL INPUTS
Logic Levels
V
IL
−0.3 +0.1 × VIO V
V
IH
+0.9 × VIO VIO + 0.3 V
I
IL
−1 +1 µA
I
IH
−1 +1 µA
DIGITAL OUTPUTS
Data Format Serial, 18 bits, twos complement
Pipeline Delay Conversion results available immediately
after completed conversion
V
OL
I
SINK
= +500 µA 0.4 V
V
OH
I
SOURCE
= −500 µA VIO − 0.3 V
POWER SUPPLIES
AVDD, DVDD 2.375 2.5 2.625 V
BVDD 4.75 5.0 5.25
VIO Specified performance 1.8 2.5 2.7 V
VIO Range V
Standby Current
1, 2
AVDD = DVDD = VIO = 2.5 V, BVDD = 5.0 V 2.25 µA
Power Dissipation
With Internal Reference 2 MSPS throughput 29 34 mW
Without Internal Reference 2 MSPS throughput 15 16.5 mW
With Internal Reference 1.5 MSPS throughput 26 30 mW
Without Internal Reference 1.5 MSPS throughput 11.5 13 mW
TEMPERATURE RANGE
3
Specified Performance T
MIN
to T
MAX
−40 +85 °C
1
With all digital inputs forced to VIO or GND as required.
2
During acquisition phase.
3
Contact an Analog Devices, Inc., sales representative for the extended temperature range.