AD7457 Analog Devices, AD7457 Datasheet - Page 3

• Manufacturer Part Number: AD7457
• Description: Pseudo Differential Input, 100 kSPS, 12-Bit ADC in 8-Lead SOT-23
• Manufacturer: Analog Devices

Specifications of AD7457

• Resolution (bits): 12bit
• # Chan: 1
• Sample Rate: 100kSPS
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni
• Ain Range: (Vref) p-p
• Adc Architecture: SAR
• Pkg Type: SOT

SPECIFICATIONS
V
Table 1.
Parameter
DYNAMIC PERFORMANCE
DC ACCURACY
ANALOG INPUT
REFERENCE INPUT
LOGIC INPUTS
LOGIC OUTPUTS
CONVERSION RATE
DD
Signal to Noise Ratio (SNR)
Signal to (Noise + Distortion) (SINAD)
Total Harmonic Distortion (THD)
Peak Harmonic or Spurious Noise
Intermodulation Distortion (IMD)
Aperture Delay
Aperture Jitter
Full-Power Bandwidth
Resolution
Integral Nonlinearity (INL)
Differential Nonlinearity (DNL)
Offset Error
Gain Error
Full-Scale Input Span
Absolute Input Voltage
V
V
DC Leakage Current
Input Capacitance
V
DC Leakage Current
V
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-and-Hold Acquisition Time
Throughput Rate
IN+
IN−
REF
REF
= 2.7 V to 5.25 V, f
Second-Order Terms
Third-Order Terms
4
Input Voltage
Input Capacitance
2
2
2
2
IN
5
SCLK
IN
INL
INH
6
2, 3
OL
OH
= 10 MHz, f
2
2
2
2
2
2
2
6
S
2
= 100 kSPS, V
Test Conditions/Comments
f
−84 dB typ
−86 dB typ
fa = 25 kHz; fb = 35 kHz
@ −3 dB
@ −0.1 dB
Guaranteed no missed codes to 12 bits
V
V
V
When in track/hold
±1% tolerance for specified performance
When in track/hold
Typically 10 nA, V
V
V
I
1.6 µs with a 10 MHz SCLK
See the Serial Interface section
SINK
IN
IN+
DD
DD
DD
DD
REF
= 30 kHz
= 2.7 V to 3.6 V
= 4.75 V to 5.25 V
= 4.75 V to 5.25 V, I
= 2.7 V to 3.6 V, I
= 200 µA
− V
= 2.5 V, T
IN−
Rev. A | Page 3 of 20
A
= T
IN
= 0 V or V
MIN
SOURCE
SOURCE
to T
= 200 µA
MAX
= 200 µA
DD
, unless otherwise noted.
B Version
71
70
−75
−75
−80
−80
5
50
20
2.5
12
±1
±0.95
±4.5
±2
V
V
−0.1 to +0.4
−0.1 to +1.5
±1
30/10
2.5
±1
10/30
2.4
0.8
±1
10
2.8
2.4
0.4
±1
10
Straight natural binary
16
1
100
REF
REF
1
Unit
dB min
dB min
dB max
dB max
dB typ
dB typ
ns typ
ps typ
MHz typ
MHz typ
Bits
LSB max
LSB max
LSB max
LSB max
V
V
V
V
µA max
pF typ
V
µA max
pF typ
V min
V max
µA max
pF max
V min
V min
V max
µA max
pF max
SCLK cycles
µs max
kSPS max
AD7457