AD7898 Analog Devices, AD7898 Datasheet - Page 2

• Manufacturer Part Number: AD7898
• Description: 5V, 12-Bit, Serial 220 kSPS ADC in a 8-Lead Package
• Manufacturer: Analog Devices

Specifications of AD7898

• Resolution (bits): 12bit
• # Chan: 1
• Sample Rate: 220kSPS
• Interface: Ser
• Analog Input Type: SE-Bip
• Ain Range: Bip (Vref),Bip (Vref) x 4,Bip 10V,Bip 2.5V
• Adc Architecture: SAR
• Pkg Type: SOIC

Parameter
DYNAMIC PERFORMANCE
DC ACCURACY
ANALOG INPUT
REFERENCE INPUT
LOGIC INPUTS
LOGIC OUTPUTS
CONVERSION RATE
POWER REQUIREMENTS
POWER-DOWN MODE
NOTES
1
2
3
4
Specifications subject to change without notice.
AD7898–SPECIFICATIONS
Temperature ranges are as follows: A Version: –40°C to +85°C.
See Terminology.
Sample tested @ 25°C to ensure compliance.
Operational with V
Signal to (Noise + Distortion) Ratio
Total Harmonic Distortion (THD)
Peak Harmonic or Spurious Noise
Intermodulation Distortion (IMD)
Aperture Delay
Aperture Jitter
Full Power Bandwidth–AD7898-10
Full Power Bandwidth–AD7898-3
Full Power Bandwidth–AD7898-10
Full Power Bandwidth–AD7898-3
Resolution
Minimum Resolution for Which
Relative Accuracy
Differential Nonlinearity
Positive Full-Scale Error
Negative Full-Scale Error
Bipolar Zero Error
AD7898-10
AD7898-3
REF IN Input Voltage Range
Input Current
Input Capacitance
Input High Voltage, V
Input Low Voltage, V
Input Current, I
Input Capacitance, C
Output High Voltage, V
Output Low Voltage, V
Floating-State Leakage Current
Floating-State Output Capacitance
Output Coding
Mode 0 Operation
Mode 1 Operation
V
V
I
I
Power Dissipation
I
T
Power Dissipation @ 25°C (Operational)
DD
DD
DD
DD
DRIVE
MIN
No Missing Codes are Guaranteed
T
2nd Order Terms
3rd Order Terms
Input Voltage Range
Input Resistance
Input Voltage Range
Input Resistance
Static
Operational
@ 25°C
MIN
to T
to T
MAX
DRIVE
MAX
IN
= 2.35 V, with Input Low Voltage, V
2
2, 3
IN
INL
INH
2, 3
OL
OH
2
2
4
2
2
2
2
2, 3
2
INL
= 0.4 V
A Version
71
–78
–89
–88
–88
20
75
3.6
4.7
2.15
2.4
12
12
± 1
± 0.9
± 3
± 3
± 4
± 10
24
± 2.5
5
2.375/2.625
1
10
V
V
± 1
10
V
0.4
± 10
10
Twos Complement
220
215
220
4.75 to 5.25
2.7 to 5.25
4.25
4.5
22.5
5
20
25
DRIVE
DRIVE
DRIVE
1
× 0.7
× 0.3
– 0.4
(V
to both Mode 0 and Mode 1 operations; T
DD
l
= 4.75 V to 5.25 V, V
–2–
Unit
dB min
dB max
dB typ
dB typ
dB typ
ns typ
ps typ
MHz typ
MHz typ
MHz typ
MHz typ
Bits
Bits
LSB max
LSB max
LSB max
LSB max
LSB max
Volts
kΩ min
Volts
kΩ min
V min/V max
µA max
pF max
V min
V max
µA max
pF max
V min
V max
µA max
pF max
kSPS max
kSPS max
kSPS max
V min to V max
V min to V max
mA max
mA max
mW max
µA max
µA max
µW max
DRIVE
= 2.7 V to 5.25 V; REF IN = 2.5 V. Specifications apply
f
f
f
fa = 29.1 kHz, fb = 29.9 kHz
@ 3 dB
@ 3 dB
@ 1 dB
@ 1 dB
2.5 V ± 5%
Typically 10 nA, V
I
I
With V
With V
For Specified Performance
For Specified Performance
Digital Inputs @ V
Digital Inputs @ V
Digital Inputs @ GND, V
Digital Inputs @ GND, V
V
IN
IN
IN
SOURCE
SINK
DD
Test Conditions/Comments
A
= 30 kHz Sine Wave
= 30 kHz Sine Wave
= 30 kHz Sine Wave
= T
= 5 V
= 200 µA
MIN
DRIVE
DRIVE
= 200 µA; V
to T
= 5 V ± 5%
= 2.7 V to 3.6 V
MAX
, unless otherwise noted.)
IN
DRIVE
DRIVE
DRIVE
= 0 V or V
DD
DD
= 2.7 V to 5.25 V
= 5 V ± 5%
= 5 V ± 5%
DRIVE
REV. A