AD7894: 5V, 14-Bit Serial, 5 us ADC in S0-8 Package Data
Sheet
Product Highlight
•
8- to 18-Bit SAR ADCs ... From the Leader in High
Performance Analog
DISCUSSIONS
View all AD7894 EngineerZone Discussions.
SAMPLE AND BUY
Visit the product page to see pricing options.
TOOLS AND SIMULATIONS
•
AD7894 IBIS Model
TECHNICAL SUPPORT
Submit a technical question or find your regional support
number.
REFERENCE MATERIALS
Technical Articles
•
MS-2210: Designing Power Supplies for High Speed ADC
DOCUMENT FEEDBACK
Submit feedback for this data sheet.
This page is dynamically generated by Analog Devices, Inc., and inserted into this data sheet. A dynamic change to the content on this page will not
trigger a change to either the revision number or the content of the product data sheet. This dynamic page may be frequently modified.
AD7894–SPECIFICATIONS
Parameter
DYNAMIC PERFORMANCE
2
Signal to (Noise + Distortion) Ratio
3
@ +25°C
T
MIN
to T
MAX
Total Harmonic Distortion (THD)
3
Peak Harmonic or Spurious Noise
3
Intermodulation Distortion (IMD)
3
2nd Order Terms
3rd Order Terms
DC ACCURACY
Resolution
Minimum Resolution for Which
No Missing Codes Are Guaranteed
Relative Accuracy
3
Differential Nonlinearity
3
AD7894-2
Positive Gain Error
3
Unipolar Offset Error
AD7894-10, AD7894-3 Only
Positive Gain Error
3
Negative Gain Error
3
Bipolar Zero Error
ANALOG INPUT
AD7894-10
Input Voltage Range
Input Current
AD7894-3
Input Voltage Range
Input Current
AD7894-2
Input Voltage Range
Input Current
REFERENCE INPUT
REF IN Input Voltage Range
Input Current
Input Capacitance
4
LOGIC INPUTS
Input High Voltage, V
INH
Input Low Voltage, V
INL
Input Current, I
IN
Input Capacitance, C
IN4
LOGIC OUTPUTS
Output High Voltage, V
OH
Output Low Voltage, V
OL
Output Coding
AD7894-10, AD7894-3
AD7894-2
CONVERSION RATE
Conversion Time
Mode 1 Operation
Mode 2 Operation
5
Track/Hold Acquisition Time
3
SAMPLE AND HOLD
–3 dB Small Signal Bandwidth
Aperture Jitter
A Versions
l
78
77
–86
–92
–92
–92
14
14
±
2
–1 to +1.5
±
12
±
8
±
8
±
8
±
10
(V
DD
= +5 V 5%, GND = 0 V, REF IN = +2.5 V. All specifications T
MIN
to T
MAX
unless
otherwise noted.)
B Versions
1
Units
Test Conditions/Comments
78
77
–86
–92
–92
–92
14
14
±
1.5
–1 to +1.5
±
10
±
6
±
6
±
6
±
8
dB min
dB min
dB max
dB typ
dB typ
dB typ
Bits
Bits
LSB max
LSB max
LSB max
LSB max
LSB max
LSB max
LSB max
f
IN
= 70 kHz Sine Wave, f
SAMPLE
= 160 kHz
See Figure 14
f
IN
= 10 kHz Sine Wave, f
SAMPLE
= 160 kHz,
Typically –87 dB. See Figure 15
f
IN
= 10 kHz Sine Wave, f
SAMPLE
= 160 kHz
fa = 9 kHz, fb
=
9.5 kHz, f
SAMPLE
= 160 kHz
±
10
2
±
2.5
1.5
0 to +2.5
500
2.375/2.625
1
10
2.4
0.8
±
10
10
4.0
0.4
±
10
2
±
2.5
1.5
0 to +2.5
500
2.375/2.625
1
10
2.4
0.8
±
10
10
4.0
0.4
V
mA max
V
mA max
V
nA max
V min/V max
µA
max
pF max
V min
V max
µA
max
pF max
V min
V max
See Analog Input Section
See Analog Input Section
2.5 V
±
5%
V
DD
= 5 V
±
5%
V
DD
= 5 V
±
5%
V
IN
= 0 V to V
DD
I
SOURCE
= 400
µA
I
SINK
= 1.6 mA
Twos Complement
Straight (Natural) Binary
5
10
0.35
7.5
50
5
10
0.35
7.5
50
µs
max
µs
max
µs
max
MHz typ
ps typ
–2–
REV. 0
AD7894
Parameter
POWER REQUIREMENTS
V
DD
I
DD
Power Dissipation
Power-Down Mode
I
DD
@ T
MIN
to T
MAX
Power Dissipation T
MIN
to T
MAX
A Versions
l
+5
5.5
27.5
20
100
B Versions
1
Units
+5
5.5
27.5
20
100
V nom
mA max
mW max
µA
max
µW
max
Test Conditions/Comments
±
5% for Specified Performance
Digital Inputs @ V
DD
, V
DD
= 5 V
±
5%
Typically 20 mW
Digital Inputs @ GND, V
DD
= 5 V
±
5%
Typ 15
µW
NOTES
1
Temperature ranges are as follows: A, B Versions: –40°C to +85°C.
2
Applies to Mode 1 operation. See Operating Modes section.
3
See Terminology.
4
Sample tested @ +25°C to ensure compliance.
5
This 10
µs
includes the “wake-up” time from standby. This “wake-up” time is timed from the rising edge of
CONVST,
whereas conversion is timed from the falling
edge of
CONVST,
for narrow
CONVST
pulsewidth the conversion time is effectively the “wake-up” time plus conversion time, hence 10
µs.
This can be seen from
Figure 3. Note that if the
CONVST
pulsewidth is greater than 5
µs,
the effective conversion time will increase beyond 10
µs.
Specifications subject to change without notice.
TIMING CHARACTERISTICS
1, 2
(V
Parameter
t
1
t
2
t
3
t
4
t
5
t
6
A, B Versions
40
31.25
2
31.25
2
60
3
10
20
4
DD
= +5 V
5%, GND = 0 V, REF IN = +2.5 V)
Units
ns min
ns min
ns min
ns max
ns min
ns max
Test Conditions/Comments
CONVST
Pulsewidth
SCLK High Pulsewidth
SCLK Low Pulsewidth
Data Access Time after Falling Edge of SCLK
V
DD
= 5 V
±
5%
Data Hold Time after Falling Edge of SCLK
Bus Relinquish Time after Falling Edge of SCLK
NOTES
1
Sample tested at +25°C to ensure compliance. All input signals are measured with tr = tf = 1 ns (10% to 90% of +5 V) and timed from a voltage level of +1.6 V.
2
The SCLK maximum frequency is 16 MHz. Care must be taken when interfacing to account for the data access time, t
4
, and the setup time required for the user’s
processor. These two times will determine the maximum SCLK frequency with which the user’s system can operate. See Serial Interface section for more information.
3
Measured with the load circuit of Figure 1 and defined as the time required for an output to cross 0.8 V or 2.0 V.
4
Derived from the measured time taken by the data outputs to change 0.5 V when loaded with the circuit of Figure 1. The measured number is then extrapolated back
to remove the effects of charging or discharging the 50 pF capacitor. This means that the time, t
6
, quoted in the timing characteristics is the true bus relinquish time
of the part and as such is independent of external bus loading capacitances.
Specifications subject to change without notice.
ABSOLUTE MAXIMUM RATINGS*
(T
A
= +25°C unless otherwise noted)
V
DD
to GND . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V
When two coordinators are connected to the network at the same time, how do terminal nodes choose which local area network to connect to? Can terminal nodes be connected to the network formed by a cer...
I am currently using PROTEUS but recently I want to use PIC16F1503, but there is no such component in PROTEUS. Does anyone have better simulation software or where to find the PROTEUS component librar...
Since many people always ask this question, here is a summary document for your reference. It must be explained here that the following steps are all for Linux systems, not WinCE. You may notice that ...
I often do FPGA design and I am used to using rising edge triggering. But I have never considered whether there is a difference between using rising edge triggering registers or falling edge triggerin...
handle= CreateFile(); //Open a file specified in the path point= SetFilePointer(); //point is the pointer to the head of the file point= point+5; byte* a=point; Does a now point to the 5th byte of the...
With the rapid development of science and technology, especially the widespread application of digital technology and various ultra-large-scale integrated circuits, electronic equipment, especially...[Details]
Editor's note: In order to help technicians or engineers who have knowledge of PIC microcontroller assembly language quickly master the method of using C language to program PIC microcontrollers, t...[Details]
1. Background:
The instrument system parameter detection and control of the chemical production workshop of Tangshan Coal Gas Coking Plant are all analog instruments, some of which are eve...[Details]
General LED lighting has a current limiting resistor in the driving circuit, and the power consumed by the resistor has nothing to do with the LED light emission. In order to improve efficiency, a...[Details]
introduction
MAX6636 is a multi-channel precision temperature monitor that can not only monitor local temperature, but also connect up to 6 diodes externally. Each channel has a programmable...[Details]
The rectified DC voltage is then converted back to AC using power electronics such as insulated gate bipolar transistors.
The output voltage is switched on and off at a high frequency, control...[Details]
Introduction
As the country increases its efforts to control the atmospheric environment, motorcycle emission regulations will become stricter year by year, and motorcycles that do not meet the...[Details]
The emergence and development of street lamps are inseparable from the prosperity and progress of cities, which makes street lamps useful. Conversely, street lamps also make the night of the city n...[Details]
summary
This article will briefly analyze the success and shortcomings of high-frequency DC-DC switching power supplies in the process of miniaturization (the second basic goal), and propose m...[Details]
Currently, high-frequency and high-efficiency DCDC converters are increasingly used in automotive electronic systems.
High switching frequency can use smaller power inductors and output filter...[Details]
1 Introduction
At present, people have higher and higher requirements for the quality of life. When people are busy with work, soymilk machine is a new type of household beverage machine. It uses so...[Details]
1 Introduction
With the development of computer technology and information technology in the world, the global information age has arrived. All countries are formulating their own development p...[Details]
Dual Tone MultiFrequency (DTMF) signaling is gradually being used in push-button telephones around the world. It quickly replaced the dial pulse signaling used in traditional rotary phones because ...[Details]
introduction
The air compressor unit in the operating area of a lead-zinc mine in Guangdong is a key equipment in mining production. There are six imported Ingersoll Rand CENTAC air compress...[Details]
Voltage hysteresis is a characteristic of lithium-ion battery and the basis of its existence. The principle is as follows: the thionyl chloride electrolyte of the battery is a strong oxidizing chem...[Details]
RF/Wirelessly
京公网安备 11010802033920号
EEWORLD
