Datasheet

ADS8361
3
SBAS230E
www.ti.com
PARAMETER CONDITIONS MIN TYP
(1)
MAX UNITS
ANALOG INPUT
Full-Scale Range
(2)
(FSR) +IN – (–IN) ±V
REF
V
Operating Common-Mode Signal 2.2 2.8 V
Input Switch Resistance –IN = V
REF
20 Ω
Input Capacitance –IN = V
REF
25 pF
Input Leakage Current –IN = V
REF
±1nA
Differential Input Switch Resistance 40 Ω
Differential Input Capacitance 15 pF
Common-Mode Rejection Ratio
(CMRR) At DC 84 dB
V
IN
= ±1.25V
PP
at 50kHz 80 dB
DC ACCURACY
Resolution 16 Bits
No Missing Code (NMC) 14 Bits
Integral Linearity Error (INL) ±3 ±8LSB
(3)
Integral Linearity Match Channel 0/1, Same A/D 4 LSB
Differential Nonlinearity (DNL) +1.5
(4)
LSB
Bipolar Offset Error (V
OS
)T
A
= –40°C to +85°C ±0.5 ±2mV
T
A
= –40°C to +125°C ±0.5 ±2.5 mV
Bipolar Offset Error Match Channel 0/1, Same A/D 0.5 1 mV
Bipolar Offset Error Drift (TCV
OS
)0.4ppm/°C
Gain Error
(6)
(G
ERR
) ±0.05 ±0.5 %
Gain Error Match 0.05 0.15 %
Gain Error Drift (TCG
ERR
)20ppm/°C
Noise 60 μVrms
Power-Supply Rejection Ratio (PSRR) 4.75V < AV
DD
< 5.25V, with –70 dB
External Reference, at DC
SAMPLING DYNAMICS
Conversion Time per A/D (t
CONV
) 100kHz ≤ f
CLK
≤ 10MHz 1.6 160 μs
Acquisition Time (t
AQ
)f
CLK
= 10MHz 400 ns
Throughout Rate 500 kSPS
Aperture Delay 5ns
Aperture Delay Matching 100 ps
Aperture Jitter 50 ps
Clock Frequency 0.1 10 MHz
AC ACCURACY
Total Harmonic Distortion (THD) V
IN
= ±2.5V
PP
at 10kHz –94 dB
Spurious-Free Dynamic Range
(SFDR) V
IN
= ±2.5V
PP
at 10kHz 94 dB
Signal-to-Noise Ratio (SNR) V
IN
= ±2.5V
PP
at 10kHz 83 dB
Signal-to-Noise + Distortion (SINAD) V
IN
= ±2.5V
PP
at 10kHz 83 dB
Channel-to-Channel Isolation V
IN
= ±2.5V
PP
at 10kHz 96 dB
VOLTAGE REFERENCE OUTPUT
Reference Voltage Ouput (V
OUT
) 2.475 2.5 2.525 V
Initial Accuracy ±1%
Output Voltage Temperature Drift
(dV
OUT
/dT) ±20 ppm/°C
Output Voltage Noise f = 0.1Hz to 10Hz, C
L
= 10μF10 μV
PP
f = 10Hz to 10kHz, C
L
= 10μF12 μVrms
Power-Supply Rejection Ratio (PSRR) 60 dB
Output Current (I
OUT
)10μA
Short-Circuit Current (I
SC
)0.5mA
Turn On Settling Time to 0.1% at C
L
= 0 100 μs
VOLTAGE REFERENCE INPUT
Reference Voltage Input (V
IN
) 1.2 2.5 2.6 V
Reference Input Resistance 100 MΩ
Reference Input Capacitance 5pF
Reference Input Current 1 μA
ELECTRICAL CHARACTERISTICS
Over recommended operating free-air temperature range at T
A
= –40°C to +125°C, AV
DD
= 5V, BV
DD
= 3V, V
REF
= internal +2.5V, f
CLK
= 10MHz, and f
SAMPLE
= 500kSPS,
unless otherwise noted.
NOTES: (1) All values are at T
A
= +25°C.
(2) Ideal input span; does not include gain or offset error.
(3) LSB means Least Significant Bit, with V
REF
equal to +2.5V; 1LSB = 76μV.
(4) Specified for 14-bit no missing code.
(5) Specified for 15-bit no missing code.
(6) Measured relative to an ideal, full-scale input (+IN – (–IN)) of 4.9999V. Thus, gain error does not include the error of the internal voltage reference.
ADS8361