AD7895 Analog Devices, AD7895 Datasheet - Page 2

• Manufacturer Part Number: AD7895
• Manufacturer: Analog Devices

Specifications of AD7895

• Resolution (bits): 12bit
• # Chan: 1
• Sample Rate: 192kSPS
• Interface: Ser
• Analog Input Type: SE-Bip,SE-Uni
• Ain Range: Bip (Vref),Bip (Vref) x 4,Bip 10V,Bip 2.5V,Uni (Vref),Uni 2.5V
• Adc Architecture: SAR
• Pkg Type: DIP,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
5
Specifications subject to change without notice.
AD7895–SPECIFICATIONS
Temperature ranges are as follows: A, B Versions: –40 C to +85 C.
Applies to Mode 1 operation. See section on “Operating Modes.”
See Terminology.
Sample tested @ +25 C to ensure compliance.
This 9.8 s 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 pulse width the conversion time is effectively the “wake-up” time plus conversion time hence 9.8 s. This can be seen from Figure 3. Note that if the CONVST pulse width
is greater than 6 s then the effective conversion time will increase beyond 9.8 s.
Signal to (Noise + Distortion) Ratio
Total Harmonic Distortion (THD)
Peak Harmonic or Spurious Noise
Intermodulation Distortion (IMD)
Resolution
Minimum Resolution for which
No Missing Codes are Guaranteed
Relative Accuracy
Differential Nonlinearity
Positive Full-Scale Error
AD7895-2
AD7895-10, AD7895-3 Only
AD7895-10
AD7895-3
AD7895-2
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
Output Coding
AD7895-10, AD7895-3
AD7895-2
Conversion Time
Mode 1 Operation
Mode 2 Operation
Track/Hold Acquisition Time
V
I
Power Dissipation
I
T
Power Dissipation @ +25 C
DD
DD
DD
MIN
@ +25 C
T
2nd Order Terms
3rd Order Terms
Unipolar Offset Error
Negative Full-Scale Error
Bipolar Zero Error
Input Voltage Range
Input Resistance
Input Voltage Range
Input Resistance
Input Voltage Range
Input Current
@ +25 C
MIN
to T
to T
MAX
MAX
IN
3
3
5
IN
INL
INH
4
OL
OH
3
3
3
2
3
3
3
3
3
A Versions
70
70
–78
–89
–87
–87
12
12
24
9
0 to +2.5
500
2.375/2.625
1
10
2.4
0.8
10
4.0
0.4
2s Complement
Straight (Natural) Binary
3.8
9.8
0.5
+5
4
20
5
10
25
1
1
3
3
3
4
10
2.5
10
l
B Versions
70
70
–78
–89
–87
–87
12
12
24
9
0 to +2.5
500
2.375/2.625
1
10
2.4
0.8
10
4.0
0.4
3.8
9.8
0.5
+5
4
20
5
10
25
(V
All specifications T
1
1
2
2
2
3
10
2.5
10
DD
= +5 V, GND = 0 V, REF IN = +2.5 V.
–2–
MIN
Units
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
Volts
k min
Volts
k min
Volts
nA max
V min/V max
pF max
V min
V max
pF ax
V min
V max
V nom
mA max
mW max
to T
A max
A max
s max
s max
s max
A max
A max
W max
MAX
unless otherwise noted)
Test Conditions/Comments
f
f
Typically –87 dB
f
fa = 9 kHz, fb = 9.5 kHz, f
Typically 0.4 LSB
2.5 V
V
V
V
I
I
Digital Inputs @ V
Typically 16 mW
Digital Inputs @ GND, V
Digital Inputs @ GND, V
IN
IN
IN
SOURCE
SINK
DD
DD
IN
5% for Specified Performance
= 50 kHz Sine Wave, f
= 50 kHz Sine Wave, f
= 50 kHz Sine Wave, f
= 0 V to V
= 5 V
= 5 V
= 1.6 mA
5%
= 200 A
5%
5%
DD
DD
, V
DD
SAMPLE
SAMPLE
SAMPLE
DD
DD
SAMPLE
= 5 V
= 5 V
= 5 V
= 200 kHz
= 200 kHz,
= 200 kHz
= 200 kHz
5%
5%
5%
REV. 0