AD7478 Analog Devices, AD7478 Datasheet - Page 7

• Manufacturer Part Number: AD7478
• Description: 8-Bit, 1 MSPS, Low Power Successive Approximation ADC Which Operates From A Single 2.35 V to 5.25 V Power Supply
• Manufacturer: Analog Devices

Specifications of AD7478

• Resolution (bits): 8bit
• # Chan: 1
• Sample Rate: 1MSPS
• Interface: Ser,SPI
• Analog Input Type: SE-Uni
• Ain Range: Uni Vdd
• Adc Architecture: SAR
• Pkg Type: SOT

AD7478 SPECIFICATIONS
V
Table 3.
Parameter
DYNAMIC PERFORMANCE
DC ACCURACY
ANALOG INPUT
LOGIC INPUTS
LOGIC OUTPUTS
CONVERSION RATE
POWER REQUIREMENTS
DD
Full Power-Down Mode
Signal-to-(Noise + Distortion) (SINAD)
Total Harmonic Distortion (THD)
Peak Harmonic or Spurious Noise (SFDR)
Intermodulation Distortion (IMD)
Aperture Delay
Aperture Jitter
Full Power Bandwidth
Resolution
Integral Nonlinearity
Differential Nonlinearity
Offset Error
Gain Error
Total Unadjusted Error (TUE)
Input Voltage Ranges
DC Leakage Current
Input Capacitance
Input High Voltage, V
Input Low Voltage, V
Input Current, I
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-and-Hold Acquisition Time
Throughput Rate
V
I
DD
DD
= 2.7 V to 5.25 V, f
Second-Order Terms
Third-Order Terms
Normal Mode (Static)
Normal Mode (Operational)
IN
IN
, SCLK Pin
, CS Pin
SCLK
INL
3
IN
INH
4
OL
OH
3
= 20 MHz, T
3
3
4
A
3
= T
3
MIN
to T
A Version
49
−65
−65
−68
−68
10
30
6.5
8
±0.5
±0.5
±0.5
±0.5
±0.5
0 to V
±1
30
2.4
0.8
0.4
±1
±1
10
V
0.4
±10
10
800
400
1
2.7/5.25
2
1
3.5
1.6
1
80
DD
Straight (Natural) Binary
MAX
− 0.2
DD
, unless otherwise noted.
1,2
Rev. F | Page 7 of 24
S Version
49
−65
−65
−68
−68
10
30
6.5
8
±0.5
±0.5
±0.5
±0.5
±0.5
0 to V
±1
30
2.4
0.8
0.4
±1
±1
10
V
0.4
±10
10
800
400
1
2.7/5.25
2
1
3.5
1.6
1
80
DD
− 0.2
DD
1,2
Unit
dB min
dB max
dB max
dB typ
dB typ
ns typ
ps typ
MHz typ
Bits
LSB max
LSB max
LSB max
LSB max
LSB max
V
μA max
pF typ
V min
V max
V max
μA max
μA typ
pF max
V min
V max
μA max
pF max
ns max
ns max
MSPS max
V min/max
mA typ
mA typ
mA max
mA max
μA max
μA max
Test Conditions/Comments
f
fa = 498.7 kHz, fb = 508.7 kHz
fa = 498.7 kHz, fb = 508.7 kHz
@ 3 dB
Guaranteed no missed codes to eight bits
V
V
Typically 10 nA, V
I
I
16 SCLK cycles with SCLK at 20 MHz
See Serial Interface section
Digital I/Ps = 0 V or V
V
V
V
V
SCLK off
SCLK on
SOURCE
SINK
IN
DD
DD
DD
DD
DD
DD
= 100 kHz sine wave, f
AD7476/AD7477/AD7478
= 5 V
= 3 V
= 4.75 V to 5.25 V, SCLK on or off
= 2.7 V to 3.6 V, SCLK on or off
= 4.75 V to 5.25 V, f
= 2.7 V to 3.6 V, f
= 200 μA
= 200 μA, V
IN
DD
= 0 V or V
= 2.7 V to 5.25 V
SAMPLE
DD
SAMPLE
SAMPLE
= 1 MSPS
= 1 MSPS
DD
= 1 MSPS