AD7851 Analog Devices, AD7851 Datasheet - Page 7

• Manufacturer Part Number: AD7851
• Description: 14-Bit, 333 kSPS, Serial Sampling A/D Converter
• Manufacturer: Analog Devices

Specifications of AD7851

• Resolution (bits): 14bit
• # Chan: 1
• Sample Rate: 333kSPS
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni
• Ain Range: (Vref) p-p,Uni (Vref)
• Adc Architecture: SAR
• Pkg Type: DIP,SOIC,SOP

ABSOLUTE MAXIMUM RATINGS
(T
AV
DV
AV
Analog Input Voltage to AGND . . . . . –0.3 V to AV
Digital Input Voltage to DGND . . . . –0.3 V to DV
Digital Output Voltage to DGND . . . –0.3 V to DV
REF
Input Current to Any Pin Except Supplies
Operating Temperature Range
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C
PDIP Package, Power Dissipation . . . . . . . . . . . . . . . . 450 mW
SOIC, SSOP Package, Power Dissipation . . . . . . . . . 450 mW
Model
AD7851AN
AD7851KN
AD7851AR
AD7851AR-REEL
AD7851ARZ
AD7851ARZ-REEL
AD7851KR
AD7851KR-REEL
AD7851KRZ
AD7851KRZ-REEL
AD7851ARS
AD7851ARS-REEL
EVAL-AD7851CB
EVAL-CONTROL BRD2
NOTES
1
2
3
4
5
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection. Although the
AD7851 features proprietary ESD protection circuitry, permanent damage may occur on devices
subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended
to avoid performance degradation or loss of functionality.
REV. B
Both A and K Grades are guaranteed up to 125°C, but at a lower throughput of 238 kHz (5 MHz).
Linearity error refers to the integral linearity error.
Z = Pb-free part.
This can be used as a standalone evaluation board or in conjunction with the EVAL-CONTROL BOARD for evaluation/demonstration purposes.
This board is a complete unit allowing a PC to control and communicate with all Analog Devices, Inc. evaluation boards ending in the CB designators. To order a
complete evaluation kit, the particular ADC evaluation board needs to be ordered, e.g., EVAL-AD7851CB, the EVAL-CONTROL BRD2, and a 12 V ac trans-
former. See the Evaluation Board application note for more information.
Commercial (A, K Versions) . . . . . . . . . . . –40°C to +125°C
Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C
θ
θ
Lead Temperature, (Soldering, 10 secs) . . . . . . . . . . 260°C
θ
θ
A
DD
DD
JC
DD
JA
JC
JA
= 25°C, unless otherwise noted.)
IN
Thermal Impedance . . 75°C/W (SOIC), 122.28°C/W (SSOP)
Thermal Impedance . . . 25°C/W (SOIC), 31.25°C/W (SSOP)
Thermal Impedance . . . . . . . . . . . . . . . . . . . . . 105°C/W
Thermal Impedance . . . . . . . . . . . . . . . . . . . . . 34.7°C/W
to AGND . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V
to DV
/REF
to DGND . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V
OUT
DD
3
3
to AGND . . . . . . . . . . –0.3 V to AV
. . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +0.3 V
4
3
3
5
Temperature
Range
–40°C to +85°C
0°C to 85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
0°C to 85°C
0°C to 85°C
0°C to 85°C
0°C to 85°C
–40°C to +85°C
–40°C to +85°C
1
2
. . . . . . . . . ± 10 mA
Linearity
Error
(LSB)
± 2
± 1
± 2
± 2
± 2
± 2
± 1
± 1
± 1
± 1
± 2
± 2
DD
DD
DD
DD
ORDERING GUIDE
+ 0.3 V
+ 0.3 V
+ 0.3 V
+ 0.3 V
2
Throughput
Rate (kSPS)
333
285
333
333
333
333
285
285
285
285
333
333
–7–
ESD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >1.5 kV
NOTES
1
2
Stresses above those listed under Absolute Maximum Ratings may cause perma-
Transient currents of up to 100 mA will not cause SCR latch-up.
nent damage to the device. This is a stress rating only; functional operation of the
device at these or any other conditions above those listed in the operational
sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
Lead Temperature, Soldering
Vapor Phase (60 secs) . . . . . . . . . . . . . . . . . . . . . . . 215°C
Infrared (15 secs) . . . . . . . . . . . . . . . . . . . . . . . . . . 220°C
1
PINOUT FOR DIP, SOIC, AND SSOP
Throughput
at 125 C (kSPS) Description
238
238
238
238
238
238
238
238
238
238
238
238
REF
IN
CONVST
/REF
SLEEP
AGND
C
C
AIN(+)
AIN(–)
AGND
BUSY
AV
REF 1
REF 2
OUT
NC
DD
10
11
12
1
2
3
4
5
6
7
8
9
NC = NO CONNECT
(Not to Scale)
AD7851
TOP VIEW
PDIP
PDIP
SOIC
SOIC
SOIC
SOIC
SOIC
SOIC
SOIC
SOIC
SSOP
SSOP
Evaluation Board
Controller Board
24
23
22
21
20
19
18
17
16
15
14
13
SYNC
SCLK
CLKIN
DIN
DOUT
DGND
DV
CAL
SM2
SM1
POLARITY
AMODE
DD
AD7851
Package
Options
N-24
N-24
R-24
R-24
R-24
R-24
R-24
R-24
R-24
R-24
RS-24
RS-24
3