Datasheet

AD7684
Rev. A | Page 3 of 16
SPECIFICATIONS
VDD = 2.7 V to 5.5 V; V
REF
= VDD; T
A
= −40°C to +85°C, unless otherwise noted.
Table 2.
Parameter Conditions Min Typ Max Unit
RESOLUTION 16 Bits
ANALOG INPUT
Voltage Range
1
+IN − (−IN) −V
REF
+V
REF
V
Absolute Input Voltage +IN, −IN −0.1 VDD + 0.1 V
Common-Mode Input Range +IN, −IN 0 V
REF
/2 V
REF
/2 + 0.1 V
Analog Input CMRR f
IN
= 100 kHz 65 dB
Leakage Current at 25°C Acquisition phase 1 nA
Input Impedance See the Analog Inputs section
THROUGHPUT SPEED
Complete Cycle 10 μs
Throughput Rate 0 100 kSPS
DCLOCK Frequency 0 2.9 MHz
REFERENCE
Voltage Range 0.5 VDD + 0.3 V
Load Current 100 kSPS, V
+IN
= V
−IN
= V
REF
/2 = 2.5 V 50 μA
DIGITAL INPUTS
Logic Levels
V
IL
−0.3 0.3 × VDD V
V
IH
0.7 × VDD VDD + 0.3 V
I
IL
−1 +1 μA
I
IH
−1 +1 μA
Input Capacitance 5 pF
DIGITAL OUTPUTS
Data Format Serial 16 bits twos complement
V
OH
I
SOURCE
= −500 μA VDD − 0.3 V
V
OL
I
SINK
= +500 μA 0.4 V
POWER SUPPLIES
VDD Specified performance 2.7 5.5 V
VDD Range
2
2.0 5.5 V
Operating Current 100 kSPS throughput
VDD = 5 V 800 μA
VDD = 2.7 V 560 μA
Standby Current
3, 4
VDD = 5 V, 25°C 1 50 nA
Power Dissipation VDD = 5 V 4 6 mW
VDD = 2.7 V 1.5 mW
VDD = 2.7 V, 10 kSPS throughput
3
150 μW
TEMPERATURE RANGE
Specified Performance T
MIN
to T
MAX
−40 +85 °C
1
The inputs must be driven differentially 180° from each other. See Pin Configuration and Function Descriptions and Analog Inputs sections.
2
See the Typical Performance Characteristics section for more information.
3
With all digital inputs forced to VDD or GND, as required.
4
During acquisition phase.