ADS7864
www.ti.com
SBAS141A – SEPTEMBER 2000 – REVISED MARCH 2005
ELECTRICAL CHARACTERISTICS
All specifications T
MIN
to T
MAX
, +V
A
= +V
D
= +5V, V
REF
= internal +2.5V and f
CLK
= 8MHz, f
SAMPLE
= 500kHz (unless otherwise
noted).
PARAMETER
Resolution
Analog Input
Input Voltage Range-Bipolar
Absolute Input Range
V
CENTER
= +2.5V
+IN
–IN
Input Capacitance
Input Leakage Current
System Performance
No Missing Codes
Integral Linearity
Integral Linearity Match
Differential Linearity
Bipolar Offset Error
Bipolar Offset Error Match
Positive Gain Error
Positive Gain Error Match
Negative Gain Error
Negative Gain Error Match
Common-Mode Rejection Ratio
At DC
V
IN
= ±1.25V
PP
at 50kHz
Noise
Power Supply Rejection Ratio
Sampling Dynamics
Conversion Time per A/D
Acquisition Time
Throughput Rate
Aperture Delay
Aperture Delay Matching
Aperture Jitter
Small-Signal Bandwidth
Dynamic Characteristics
Total Harmonic Distortion
SINAD
Spurious Free Dynamic Range
Channel-to-Channel Isolation
Voltage Reference
Internal Reference Voltage
Internal Drift
Internal Noise
Internal Source Current
Internal Load Rejection
Internal PSRR
External Reference Voltage Range
Input Current
Input Capacitance
5
1.2
2.475
2.5
10
50
2
0.005
80
2.5
2.6
100
5
1.2
2.525
2.475
2.5
10
50
2
0.005
80
2.5
2.6
100
2.525
V
ppm/°C
µV
PP
mA
mV/µA
dB
V
µA
pF
V
IN
= ±2.5V
PP
at 100kHz
V
IN
= ±2.5V
PP
at 100kHz
V
IN
= ±2.5V
PP
at 100kHz
V
IN
= ±2.5V
PP
at 50kHz
–75
71
78
–76
–75
71
78
–76
dB
dB
dB
dB
500
3.5
100
50
40
1.75
0.25
500
3.5
100
50
40
1.75
0.25
µs
µs
kHz
ns
ps
ps
MHz
84
80
120
0.3
2
Referenced to REF
IN
±0.15
Referenced to REF
IN
±0.15
Referenced to REF
IN
–0.9
12
±0.75
0.5
±0.6
±0.75
±4
3
±0.75
3
±0.75
3
84
80
120
0.3
2
±0.1
±0.1
–0.9
2
12
±0.5
0.5
±0.4
±0.5
±3
3
±0.5
3
±0.5
3
±1
Bits
LSB
LSB
LSB
LSB
LSB
% of FSR
LSB
% of FSR
LSB
dB
dB
µV
RMS
LSB
CLK = GND
–V
REF
–0.3
–0.3
15
±1
+V
REF
+V
A
+ 0.3
+V
A
+ 0.3
15
±1
–V
REF
+V
REF
V
V
V
pF
µA
TEST CONDITIONS
ADS7864Y
MIN
TYP
MAX
12
MIN
ADS7864YB
TYP
MAX
12
UNIT
Bits
4
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