
ADS8361
3
SBAS230E
www.ti.com
PARAMETER
CONDITIONS
MIN
TYP(1)
MAX
UNITS
ANALOG INPUT
Full-Scale Range(2)
(FSR)
+IN – (–IN)
±VREF
V
Operating Common-Mode Signal
2.2
2.8
V
Input Switch Resistance
–IN = VREF
20
Ω
Input Capacitance
–IN = VREF
25
pF
Input Leakage Current
–IN = VREF
±1nA
Differential Input Switch Resistance
40
Ω
Differential Input Capacitance
15
pF
Common-Mode Rejection Ratio
(CMRR)
At DC
84
dB
VIN = ±1.25VPP 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
(VOS)TA = –40°C to +85°C
±0.5
±2mV
TA = –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
(TCVOS)0.4
ppm/°C
Gain Error(6)
(GERR)
±0.05
±0.5
%
Gain Error Match
0.05
0.15
%
Gain Error Drift
(TCGERR)20
ppm/°C
Noise
60
μVrms
Power-Supply Rejection Ratio
(PSRR)
4.75V < AVDD < 5.25V, with
–70
dB
External Reference, at DC
SAMPLING DYNAMICS
Conversion Time per A/D
(tCONV)
100kHz ≤ fCLK ≤ 10MHz
1.6
160
μs
Acquisition Time
(tAQ)fCLK = 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)
VIN = ±2.5VPP at 10kHz
–94
dB
Spurious-Free Dynamic Range
(SFDR)
VIN = ±2.5VPP at 10kHz
94
dB
Signal-to-Noise Ratio
(SNR)
VIN = ±2.5VPP at 10kHz
83
dB
Signal-to-Noise + Distortion
(SINAD)
VIN = ±2.5VPP at 10kHz
83
dB
Channel-to-Channel Isolation
VIN = ±2.5VPP at 10kHz
96
dB
VOLTAGE REFERENCE OUTPUT
Reference Voltage Ouput
(VOUT)
2.475
2.5
2.525
V
Initial Accuracy
±1%
Output Voltage Temperature Drift (dVOUT/dT)
±20
ppm/°C
Output Voltage Noise
f = 0.1Hz to 10Hz, CL
μVPP
f = 10Hz to 10kHz, CL = 10μF12
μVrms
Power-Supply Rejection Ratio
(PSRR)
60
dB
Output Current
(IOUT)10
μA
Short-Circuit Current
(ISC)0.5
mA
Turn On Settling Time
to 0.1% at CL = 0
100
μs
VOLTAGE REFERENCE INPUT
Reference Voltage Input
(VIN)
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 TA = –40°C to +125°C, AVDD = 5V, BVDD = 3V, VREF = internal +2.5V, fCLK = 10MHz, and fSAMPLE = 500kSPS,
unless otherwise noted.
NOTES: (1) All values are at TA = +25°C.
(2) Ideal input span; does not include gain or offset error.
(3) LSB means Least Significant Bit, with VREF 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