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ADS7863IRGETG4 Arkusz danych(PDF) 4 Page - Texas Instruments

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Numer części ADS7863IRGETG4
Szczegółowy opis  Dual, 2MSPS, 12-Bit, 2 2 or 3 3 Channel, Simultaneous Sampling
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Producent  TI1 [Texas Instruments]
Strona internetowa  http://www.ti.com
Logo TI1 - Texas Instruments

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ADS7863
SBAS383E – JUNE 2007 – REVISED JANUARY 2011
www.ti.com
ELECTRICAL CHARACTERISTICS
At TA = –40°C to +125°C, entire power-supply range, VREF = 2.5V (internal), fCLK = 32MHz, and tDATA = 2MSPS, unless
otherwise noted.
ADS7863
PARAMETER
TEST CONDITIONS
MIN
TYP(1)
MAX
UNIT
RESOLUTION
12
Bits
ANALOG INPUT
FSR
Full-scale differential input range
(CHxx+) – (CHxx–)
–VREF
+VREF
V
VIN
Absolute input voltage
CHxx+ or CHxx+ to AGND
–0.1
AVDD + 0.1
V
CIN
Input capacitance
CHxx+ or CHxx– to AGND
2
pF
CID
Differential input capacitance
4
pF
IIL
Input leakage current
–1
+1
nA
CMRR
Common-mode rejection ratio
Both ADCs, dc to 100kHz
72
dB
DC ACCURACY
–40°C < TA < +125°C
–1.25
±0.6
+1.25
LSB
INL
Integral nonlinearity
–40°C < TA < +85°C
–1
±0.5
+1
LSB
DNL
Differential nonlinearity
–1
±0.5
+1
LSB
VOS
Input offset error
–3
±0.5
+3
LSB
VOS match
–3
±0.5
+3
LSB
dVOS/dT
Input offset thermal drift
±3
mV/°C
GERR
Gain error
Referred to voltage at REFIN
–0.5
+0.5
%
GERR match
–0.5
±0.1
+0.5
%
GERR/dT
Gain error thermal drift
Referred to voltage at REFIN
±1
ppm/°C
PSRR
Power-supply rejection ratio
AVDD = 5.5V
70
dB
AC ACCURACY
SINAD
Signal-to-noise + distortion
VIN = 5VPP at 100kHz
69.8
71
dB
SNR
Signal-to-noise ratio
VIN = 5VPP at 100kHz
70
71.5
dB
THD
Total harmonic distortion
VIN = 5VPP at 100kHz
–81
–76
dB
SFDR
Spurious-free dynamic range
VIN = 5VPP at 100kHz
76
84
dB
SAMPLING DYNAMICS
tCONV
Conversion time per ADC
1MHz < fCLK ≤ 32MHz
16
tCLK
tACQ
Acquisition time
2
tCLK
tDATA
Data rate
1MHz < fCLK ≤ 32MHz
62.5
2000
kSPS
tA
Aperture delay
6
ns
tA match
50
ps
tAJIT
Aperture jitter
50
ps
fCLK
Clock frequency on CLOCK
1
32
MHz
TCLK
Clock period
31.25
1000
ns
INTERNAL VOLTAGE REFERENCE
Resolution
Reference output DAC resolution
10
Bits
Over 20%...100% DAC range
0.2VREFOUT
VREFOUT
V
DAC = 0x3FF,
VREFOUT
Reference output voltage
2.485
2.500
2.515
V
–40°C < TA < +125°C
DAC = 0x3FF at +25°C
2.495
2.500
2.505
V
dVREFOUT/dT
Reference voltage drift
±10
ppm/°C
–9.76
±2.44
9.76
mV
DNLDAC
DAC differential nonlinearity
–4
±1
4
LSB
–9.76
±1.22
9.76
mV
INLDAC
DAC integral nonlinearity
–4
±0.5
4
LSB
–9.76
±2.44
9.76
mV
VOSDAC
DAC offset error
VREFOUT = 0.5V
–4
±1
4
LSB
(1)
All typical values at TA = +25°C.
4
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