SPECIFICATIONS
At TA = –25°C to +85°C, fS = 250kHz, +VS = +5V, and –VS = –5V, using internal reference, unless otherwise specified.
ADS7811U
PARAMETER
RESOLUTION
CONDITIONS
MIN
TYP
MAX
UNITS
16
Bits
ANALOG INPUT
Voltage Range
Impedance
±2.5V
100
30
V
MΩ
pF
After Input Capacitor is Charged
Acquire and Convert
Capacitance
THROUGHPUT SPEED
Conversion Cycle
4.0
µs
Throughput Rate
250
15
kHz
DC ACCURACY
Integral Linearity Error
No Missing Codes
Transition Noise(2)
Full Scale Error(3)
±4
LSB(1)
Bits
LSB
0.8
±0.5
%
Full Scale Error Drift
Full Scale Error(3)
Full Scale Error Drift
Bipolar Zero Error
Bipolar Zero Error Drift
Power Supply Sensitivity
±7
±0.2
2
ppm/°C
%
ppm/°C
mV
ppm/°C
LSB
External 2.5000V Reference
External 2.5000V Reference
±10
±16
±2
±6
+VS ±5%, –VS ±5%
AC ACCURACY
Spurious-Free Dynamic Range
Total Harmonic Distortion
Signal-to-(Noise+Distortion)
fIN = 100kHz
fIN = 100kHz
96
84
84
100
–98
87
28
87
1
dB(4)
dB
dB
dB
dB
–96
f
IN = 100kHz
–60dB Input
IN = 100kHz
Signal-to-Noise
Usable Bandwidth(5)
Aperture Delay
f
MHz
ns
40
REFERENCE
Internal Reference Voltage
Internal Reference Source Current
Internal Reference Drift
External Reference Voltage Range
External Reference Current Drain
2.48
2.5
1
15
2.5
2.52
100
V
µA
ppm/°C
V
VREF = +2.5V
µA
DIGITAL INPUTS
Logic Levels
VIL
VIH
IIL
–0.3
+2.8
+0.8
+VS +0.3V
±10
V
V
µA
µA
IIH
±10
DIGITAL OUTPUTS
Data Format
Data Coding
VOL
Parallel 16 bits
Binary Two’s Complement
ISINK = 1.6mA
ISOURCE = 200µA
High-Z State,
+0.4
±5
V
V
µA
VOH
+4
Leakage Current
VOUT = 0V to VDIG
Output Capacitance
High-Z State
15
pF
DIGITAL TIMING
Bus Access Time
Bus Relinquish Time
83
83
ns
ns
POWER SUPPLIES
+VS
–VS
+4.75
–5.25
+5
–5
+5.25
–4.75
V
V
+IS
–IS
+30
–10
200
mA
mA
mW
Power Dissipation
250
TEMPERATURE RANGE
Specified Performance
Storage
–25
–55
+85
+125
°C
°C
NOTES: (1) LSB means Least Significant Bit. For the 16-bit, ±2.5V input ADS7811, one LSB is 76µV. (2) Typical rms noise at worst case transitions and
temperatures. (3) Full scale error is the worst case of –Full Scale or +Full Scale untrimmed deviation from ideal first and last code transitions, divided by the transition
voltage (not divided by the full-scale range) and includes the effect of offset error. (4) All specifications in dB are referred to a full-scale ±2.5V input. (5) Usable
Bandwidth defined as Full-Scale input frequency at which Signal-to-(Noise+Distortion) degrades to 60dB, or 10 bits of accuracy.
®
2
ADS7811
BB [ BURR-BROWN CORPORATION ]
