AD7890 Analog Devices, AD7890 Datasheet - Page 3

• Manufacturer Part Number: AD7890
• Description: LC2MOS 8-Channel, 12-Bit Serial Data Acquisition System
• Manufacturer: Analog Devices

Specifications of AD7890

• Resolution (bits): 12bit
• # Chan: 8
• Sample Rate: 117kSPS
• Interface: Ser
• Analog Input Type: SE-Bip,SE-Uni
• Ain Range: Bip 10V,Uni 2.5V,Uni 4.096V
• Adc Architecture: SAR
• Pkg Type: DIP,SOIC

SPECIFICATIONS
V
T
Table 1.
Parameter
DYNAMIC PERFORMANCE
DC ACCURACY
ANALOG INPUTS
MUX OUT OUTPUT
SHA IN INPUT
REFERENCE OUTPUT/INPUT
MAX
DD
Signal to (Noise + Distortion) Ratio
Total Harmonic Distortion (THD)
Peak Harmonic or Spurious Noise
Intermodulation Distortion
Channel-to-Channel Isolation
Resolution
Min. Resolution for Which
Missing Codes Are Guaranteed
Relative Accuracy
Differential Nonlinearity
Positive Full-Scale Error
Full-Scale Error Match
AD7890-2, AD7890-4
AD7890-10 Only
AD7890-10
AD7890-4
AD7890-2
Output Voltage Range
Output Resistance
Input Voltage Range
Input Current
REF IN Input Voltage Range
Input Impedance
Input Capacitance
REF OUT Output Voltage
REF OUT Error @ 25°C
REF OUT Temperature Coefficient
REF OUT Output Impedance
= 5 V, AGND = DGND = 0 V, REF IN = 2.5 V, f
, unless otherwise noted.
2nd Order Terms
3rd Order Terms
Unipolar Offset Error
Unipolar Offset Error Match
Negative Full-Scale Error
Bipolar Zero Error
Bipolar Zero Error Match
Input Voltage Range
Input Resistance
Input Voltage Range
Input Resistance
Input Voltage Range
Input Current
AD7890-10, AD7890-4
AD7890-2
T
MIN
to T
MAX
2
5
2
4
2
2
2
No
2
2
2
2
2
A Versions
70
−77
−78
−80
−80
−80
12
12
±1
±1
±2.5
2
±2
2
±2
±5
2
±10
20
0 to 4.096
11
0 to 2.5
50
0 to 2.5
3/5
2
0 to 2.5
±50
2.375/2.625
1.6
10
2.5
±10
±20
25
2
1
CLK IN
B Versions
70
−77
−78
−80
−80
−80
12
12
±0.5
±1
±2.5
2
±2
2
±2
±5
2
±10
20
0 to 4.096
11
0 to 2.5
50
0 to 2.5
3/5
2
0 to 2.5
±50
2.375/2.625
1.6
10
2.5
±10
±20
25
2
= 2.5 MHz external, MUX OUT connect to SHA IN. All specifications T
Rev. C | Page 3 of 28
S Version
70
−77
−78
−80
−80
−80
12
12
±1
±1
±2.5
2
±2
2
±2
±5
2
±10
20
0 to 4.096
11
0 to 2.5
200
0 to 2.5
3/5
2
0 to 2.5
±50
2.375/2.625
1.6
10
2.5
±10
±25
25
2
Unit
dB min
dB max
dB max
dB typ
dB typ
dB max
Bits
Bits
LSB max
LSB max
LSB max
LSB max
LSB max
LSB max
LSB max
LSB max
LSB max
Volts
kΩ min
Volts
kΩ min
Volts
nA max
Volts
kΩ min/kΩ max
kΩ max
Volts
nA max
V min/V max
kΩ min
pF max
V nom
mV max
mV max
ppm/°C typ
kΩ nom
Assuming V
Test Conditions/Comments
Using external CONVST, any channel
f
f
f
fa = 9 kHz, fb = 9.5 kHz, f
f
2.5 V ± 5%
Resistor connected to internal reference node
IN
IN
IN
IN
= 10 kHz sine wave, f
= 10 kHz sine wave, f
= 10 kHz sine wave, f
= 1 kHz sine wave
IN
is driven from low impedance
SAMPLE
SAMPLE
SAMPLE
SAMPLE
= 100 kHz
= 100 kHz
= 100 kHz
= 100 kHz
AD7890
MIN
to
3
3
3
3