ELECTRICAL CHARACTERISTICS
Over recommended operating free-air temperature range at TA = –40°C to +125°C, +VA + VD = +5V, VREF = internal +2.5V, fCLK = 8MHz, and fSAMPLE = 500kSPS,
unless otherwise noted.
ADS7861I, E
TYP
ADS7861IB, EB
PARAMETER
RESOLUTION
CONDITIONS
MIN
MAX
MIN
TYP
MAX
UNITS
12
ꢀ
ꢀ
Bits
ANALOG INPUT
Input Voltage Range-Bipolar
Input Capacitance
VCENTER = Internal VREF at 2.5V
–VREF
+VREF
ꢀ
V
pF
µA
15
±1
ꢀ
ꢀ
Input Leakage Current
SYSTEM PERFORMANCE
No Missing Codes
Integral Linearity
Integral Linearity Match
Differential Linearity
Bipolar Offset Error
12
ꢀ
Bits
LSB
LSB
LSB
LSB
LSB
LSB
% of FSR
LSB
% of FSR
LSB
±0.75
0.5
±1
±0.5
±0.5
±2
±1
±0.5
ꢀ
±0.5
ꢀ
±1
ꢀ
±1
ꢀ
ꢀ
TA = –40°C to +85°C
±3
±3.5
3
±0.75
2
T
A = –40°C to +125°C
ꢀ
Bipolar Offset Error Match
Positive Gain Error
Positive Gain Error Match
Negative Gain Error
Negative Gain Error Match
Common-Mode Rejection Ratio
2
Referenced to REFIN
Referenced to REFIN
±0.15
±0.15
±0.10
±0.10
±0.50
1
±0.50
1
±0.75
2
At DC
IN = ±1.25VPP at 50kHz
80
80
120
0.5
ꢀ
ꢀ
ꢀ
ꢀ
dB
dB
µVrms
LSB
V
Noise
Power Supply Rejection Ratio
2
ꢀ
SAMPLING DYNAMICS
Conversion Time per A/D
Acquisition Time
1.625
0.375
ꢀ
ꢀ
µs
µs
Throughput Rate
Aperture Delay
Aperture Delay Matching
Aperture Jitter
Small-Signal Bandwidth
500
ꢀ
kSPS
ns
ps
ps
MHz
3.5
100
50
ꢀ
ꢀ
ꢀ
ꢀ
40
DYNAMIC CHARACTERISTICS (VIN = ±2.5VPP at 100kHz)
Total Harmonic Distortion
T
A = –40°C to +85°C
–72
–71
–76
–75
dB
dB
dB
dB
dB
dB
T
A = –40°C to +125°C
SINAD
70
72
71
ꢀ
76
75
Spurious Free Dynamic Range
TA = –40°C to +85°C
T
A = –40°C to +125°C
Channel-to-Channel Isolation
–80
ꢀ
ꢀ
VOLTAGE REFERENCE
Internal
Internal Drift
2.475
2.5
±25
50
2.525
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
V
ppm/°C
µVPP
mA
mV/µA
dB
V
µA
pF
Internal Noise
Internal Source Current
Internal Load Rejection
Internal PSRR
External Voltage Range
Input Current
2
0.005
80
2.5
0.05
5
1.2
2.6
1
ꢀ
ꢀ
Input Capacitance
DIGITAL INPUT/OUTPUT
Logic Family
CMOS
ꢀ
Logic Levels: VIH
VIL
VOH
VOL
External Clock, Optional
Data Format
IIH = +5µA
IIL = +5µA
IOH = –0.5mA
IOL = –0.5mA
3.0
–0.3
3.5
+VDD + 0.3
1
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
V
V
V
V
MHz
0.4
8
ꢀ
ꢀ
0.2
ꢀ
Binary Two's Complement
ꢀ
POWER SUPPLY REQUIREMENTS
Power Supply Voltage, +V
Quiescent Current, +VA
4.75
5
5
5
25
25
5.25
8
8.5
40
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
V
TA = –40°C to +85°C
mA
mA
mW
mW
T
A = –40°C to +125°C
Power Dissipation
TA = –40°C to +85°C
T
A = –40°C to +125°C
42.5
ꢀ Specifications same as ADS7861I, ADS7861E.
ADS7861
SBAS110D
3
TI [ TEXAS INSTRUMENTS ]
