ELECTRICAL CHARACTERISTICS (Cont.)
At TA = full specified temperature range, VS = +5V, differential input range = 2V to 3V for each input, sampling rate = 32MSPS, unless otherwise noted.
ADS2806Y
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
DYNAMIC CHARACTERISTICS (Cont.)
Channel-to-Channel Crosstalk
Output Noise
2Vp-p
Input Grounded
80
0.2
2
dBc
LSBs rms
ns
Aperture Delay Time
Aperture Jitter
Overvoltage Recovery Time
1.2
2
ps rms
ns
DIGITAL INPUTS
Logic Family
Convert Command
+3V/+5V CMOS Compatible
Rising Edge of Convert Clock
Start Conversion
High Level Input Current(5) (VIN = 5V)
Low Level Input Current (VIN = 0V)
High Level Input Voltage
Low Level Input Voltage
Input Capacitance
+50
+10
µA
µA
V
V
pF
+2.4
+1.0
5
DIGITAL OUTPUTS
Logic Family
CMOS
Logic Coding
Straight Offset Binary
Low Output Voltage (IOL = 50µA)
Low Output Voltage, (IOL = 1.6mA)
High Output Voltage, (IOH = 50µA)
High Output Voltage, (IOH = 0.5mA)
Low Output Voltage, (IOL = 50µA)
High Output Voltage, (IOH = 50µA)
3-State Enable Time
VDRV = 5V
VDRV = 5V
VDRV = 5V
VDRV = 5V
VDRV = 3V
VDRV = 3V
OE = L(5)
+0.1
+0.2
V
V
V
V
V
+4.9
+4.8
+0.4
+2.4
V
20
2
5
40
10
ns
ns
pF
3-State Disable Time
Output Capacitance
OE = H(5)
ACCURACY (Internal Reference,
2Vp-p, Unless Otherwise Noted)
Zero Error (Midscale)
at 25°C
±0.5
%FS
Zero Error Drift (Midscale)
Gain Error(6)
16
±1.5
66
±1.0
23
ppm/°C
%FS
ppm/°C
%FS
ppm/°C
dB
at 25°C
at 25°C
Gain Error Drift(6)
Gain Error(7)
Gain Error Drift(7)
Power-Supply Rejection of Gain
REFT Tolerance
2V Full Scale
∆VS = ±5%
70
Deviation From Ideal 3.0V
Deviation From Ideal 3.25V
±10
±20
±65
±65
mV
mV
3V Full Scale
REFB Tolerance
2V Full Scale
3V Full Scale
Deviation From Ideal 2.0V
Deviation From Ideal 1.75V
±10
±20
mV
mV
V
V
Ω
External REFT Voltage Range
External REFB Voltage Range
Reference Input Resistance
REFB + 0.4
1.70
3
2
375
VS – 1.70
REFT – 0.4
POWER-SUPPLY REQUIREMENTS
Supply Voltage: +VS
Supply Current: +IS
Power Dissipation: VDRV = 5V
VDRV = 3V
Operating
Operating
+4.75
+5.0
78
+5.25
475
V
mA
mW
mW
mW
mW
External Reference
External Reference
Internal Reference
Internal Reference
430
400
450
420
VDRV = 5V
VDRV = 3V
Thermal Resistance, θJA
TQFP-64
21.5
°C/W
NOTES: (1) Spurious-Free Dynamic Range refers to the magnitude of the largest harmonic. (2) dBFS means dB relative to Full-Scale. (3) 2-tone intermodulation
distortion is referred to the largest fundamental tone. This number will be 6dB higher if it is referred to the magnitude of the 2-tone fundamental envelope.
(4) Effective number of bits (ENOB) is defined by as (SINAD – 1.76)/6.02. (5) A 50kΩ pull-down resistor is inserted internally on OE pins. (6) Includes internal
reference. (7) Excludes internal reference.
ADS2806
SBAS178B
3
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