AD7938 View Datasheet(PDF) - Analog Devices
Part Name
Description
MFG CO.
AD7938 Datasheet PDF : 32 Pages
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AD7938/AD7939
Parameter
VREF Input Capacitance
LOGIC INPUTS
Input High Voltage, VINH
Input Low Voltage, VINL
Input Current, IIN
Input Capacitance, CIN4
LOGIC OUTPUTS
Output High Voltage, VOH
Output Low Voltage, VOL
Floating-State Leakage Current
Floating-State Output Capacitance4
Output Coding
CONVERSION RATE
Conversion Time
Track-and-Hold Acquisition Time
Throughput Rate
POWER REQUIREMENTS
VDD
VDRIVE
IDD6
Normal Mode (Static)
Normal Mode (Operational)
Autostandby Mode
Full/Autoshutdown Mode (Static)
Power Dissipation
Normal Mode (Operational)
Autostandby Mode (Static)
Full/Autoshutdown Mode (Static)
B Version1
15
25
Unit
pF typ
pF typ
Test Conditions/Comments
When in track
When in hold
2.4
V min
0.8
V max
±5
µA max
Typically 10 nA, VIN = 0 V or VDRIVE
10
pF max
2.4
V min
0.4
V max
±3
µA max
10
pF max
Straight (Natural) Binary
Twos Complement
ISOURCE = 200 µA
ISINK = 200 µA
CODING bit = 0
CODING bit =1
t2 + 13 tCLK
125
1.5
ns
ns max
MSPS max
Full-scale step input
2.7/5.25
2.7/5.25
0.8
2.7
2.0
0.3
160
2
V min/max
V min/max
mA typ
mA max
mA max
mA typ
µA typ
µA max
Digital I/PS = 0 V or VDRIVE
VDD = 2.7 V to 5.25 V, SCLK on or off
VDD = 4.75 V to 5.25 V
VDD = 2.7 V to 3.6 V
FSAMPLE = 100 kSPS, VDD = 5 V
(Static)
SCLK on or off
13.5
mW max
VDD = 5 V
6
mW max
VDD = 3 V
800
µW typ
VDD = 5 V
480
µW typ
VDD = 3 V
10/6
µW max
VDD = 5 V/3 V
1 Temperature ranges as follows: B Versions: −40°C to +85°C.
2 See the Terminology section.
3 For full common-mode range see Figure 25 and Figure 26.
4 Sample tested during initial release to ensure compliance.
5 This device is operational with an external reference in the range 0.1 V to VDD. See the Reference Section for more details.
6 Measured with a midscale dc analog input.
Rev. 0 | Page 6 of 32
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