AD7854 Analog Devices, AD7854 Datasheet - Page 2

• Manufacturer Part Number: AD7854
• Description: 3 V to 5 V Single Supply, 200 kSPS, 12-Bit, Parallel Sampling ADC
• Manufacturer: Analog Devices

Specifications of AD7854

• Resolution (bits): 12bit
• # Chan: 1
• Sample Rate: 200kSPS
• Interface: Byte,Par
• Analog Input Type: Diff-Uni,SE-Uni
• Ain Range: (Vref) p-p
• Adc Architecture: SAR
• Pkg Type: DIP,SOIC,SOP

AD7854/AD7854L–SPECIFICATIONS
External Reference, f
(AD7854L); T
Parameter
DYNAMIC PERFORMANCE
DC ACCURACY
ANALOG INPUT
REFERENCE INPUT/OUTPUT
LOGIC INPUTS
LOGIC OUTPUTS
CONVERSION RATE
Signal to Noise + Distortion Ratio
Total Harmonic Distortion (THD)
Peak Harmonic or Spurious Noise
Intermodulation Distortion (IMD)
Resolution
Integral Nonlinearity
Differential Nonlinearity
Unipolar Offset Error
Unipolar Gain Error
Bipolar Positive Full-Scale Error
Negative Full-Scale Error
Bipolar Zero Error
Input Voltage Ranges
Leakage Current
Input Capacitance
REF
Input Impedance
REF
REF
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
Conversion Time
Track/Hold Acquisition Time
Second Order Terms
Third Order Terms
(SNR)
IN
OUT
OUT
Input Voltage Range
Output Voltage
Tempco
A
= T
MIN
IN
to T
CLKIN
IN
INL
INH
4
OL
MAX
OH
= 4 MHz (for L Version: 1.8 MHz (0 C to +70 C) and 1 MHz (–40 C to +85 C)); f
, unless otherwise noted.) Specifications in () apply to the AD7854L.
3
4
A Version
70
–78
–78
–78
–78
12
± 1
± 1
± 3
± 2
± 4
± 2
± 4
± 2
± 4
± 2
± 4
0 to V
± V
± 1
20
2.3/V
150
2.3/2.75
20
3
2.1
0.4
0.6
± 10
10
4
2.4
0.4
± 10
10
4.6 (10)
0.5 (1)
REF
DD
REF
/2
Straight (Natural) Binary
1
B Version
71
–78
–78
–78
–78
12
± 0.5
± 1
± 3
± 2
± 4
± 2
± 4
± 2
± 4
± 2
± 4
0 to V
± V
± 1
20
2.3/V
150
2.3/2.7
20
3
2.1
0.4
0.6
± 10
10
4
2.4
0.4
± 10
10
4.6 (9)
0.5 (1)
Twos Complement
REF
DD
REF
/2
1
S Version
70
–78
–78
–78
–78
12
± 1
± 1
± 4
± 2
± 4
± 2
± 5
± 2
± 5
± 2
± 5
0 to V
± V
± 1
20
2.3/V
150
2.3/2.7
20
3
2.1
0.4
0.6
± 10
10
4
2.4
0.4
± 10
10
4.6 (9)
0.5 (1)
–2–
REF
DD
REF
/2
1, 2
1
Units
dB min
dB max
dB max
dB typ
dB typ
Bits
LSB max
LSB max
LSB max
LSB typ
LSB max
LSB typ
LSB max
LSB typ
LSB max
LSB typ
LSB max
Volts
Volts
µA max
pF typ
V min/max
kΩ typ
V min/max
ppm/°C typ
V min
V min
V max
V max
µA max
pF max
V min
V min
V max
µA max
pF max
µs max
µs min
(AV
DD
= DV
Test Conditions/Comments
Typically SNR is 72 dB
V
(L Version: f
V
(L Version: f
V
(L Version: f
fa = 9.983 kHz, fb = 10.05 kHz, f
(L Version: f
fa = 9.983 kHz, fb = 10.05 kHz, f
(L Version: f
5 V Reference V
Guaranteed No Missed Codes to 12 Bits
i.e., AIN(+) – AIN(–) = 0 to V
biased up but AIN(+) cannot go below AIN(–).
i.e., AIN(+) – AIN(–) = –V
should be biased to +V
AIN(–) but cannot go below 0 V.
Functional from 1.2 V
AV
AV
AV
AV
Typically 10 nA, V
I
AV
AV
I
Unipolar Input Range
Bipolar Input Range
t
(L Versions Only, 0°C to +70°C, 1.8 MHz CLKIN)
(L Versions Only, –40°C to +85°C, 1 MHz CLKIN)
DD
CLKIN
SOURCE
SINK
IN
IN
IN
= +3.0 V to +5.5 V, REF
DD
DD
DD
DD
DD
DD
= 10 kHz Sine Wave, f
= 10 kHz Sine Wave, f
= 10 kHz Sine Wave, f
= 0.8 mA
= DV
= DV
= DV
= DV
= DV
= DV
× 18
= 200 µA
DD
DD
DD
DD
DD
DD
SAMPLE
SAMPLE
SAMPLE
SAMPLE
SAMPLE
SAMPLE
= 4.5 V to 5.5 V
= 3.0 V to 3.6 V
= 4.5 V to 5.5 V
= 3.0 V to 3.6 V
= 4.5 V to 5.5 V
= 3.0 V to 3.6 V
DD
IN
= 200 kHz (AD7854), 100 kHz
= 5 V
= 100 kHz @ f
= 100 kHz @ f
= 100 kHz @ f
= 100 kHz @ f
= 100 kHz @ f
= 0 V or V
REF
/2 and AIN(+) can go below
SAMPLE
SAMPLE
SAMPLE
REF
IN
/REF
/2 to +V
REF
DD
SAMPLE
SAMPLE
= 200 kHz
= 200 kHz
= 200 kHz
, AIN(–) can be
CLKIN
CLKIN
CLKIN
CLKIN
CLKIN
OUT
= 2.5 V
REF
= 2 MHz)
= 2 MHz)
= 2 MHz)
= 2 MHz)
= 2 MHz)
= 200 kHz
= 200 kHz
/2, AIN(–)
REV. B