Datasheet

ADS828
3
SBAS126A
ELECTRICAL CHARACTERISTICS (Cont.)
At T
A
= full specified temperature range, single-ended input range = 1.5V to 3.5V, sampling rate = 75MHz, convert command clock = +3V, external reference unless
otherwise noted.
CMOS
Straight Offset Binary
ADS828E
PARAMETER CONDITIONS MIN TYP MAX UNITS
DIGITAL INPUTS
Logic Family TTL, +3V/5V CMOS Compatible
Convert Command Start Conversion Rising Edge of Convert Clock
High Level Input Current
(5)
(V
IN
= 5V) 100 µA
Low Level Input Current (V
IN
= 0V) 10 µA
High Level Input Voltage +2.0 V
Low Level Input Voltage +0.8 V
Input Capacitance 5pF
DIGITAL OUTPUTS
Logic Family
Logic Coding
Low Output Voltage (I
OL
= 50µA) VDRV = 5V +0.1 V
Low Output Voltage, (I
OL
= 1.6mA) +0.2 V
High Output Voltage, (I
OH
= 50µA) +4.9 V
High Output Voltage, (I
OH
= 0.5mA) +4.8 V
Low Output Voltage (I
OL
= 50µA) VDRV = 3V +0.1 V
High Output Voltage, (I
OH
= 50µA) +2.8 V
3-State Enable Time OE = L 20 40 ns
3-State Disable Time OE = H 2 10 ns
Output Capacitance 5pF
ACCURACY
(Internal Reference, 2Vp-p, Unless Otherwise Noted) f
S
= 2.5MHz
Zero Error (Referred to –FS) at 25°C ±0.5 ±3.0 %FS
Zero Error Drift (Referred to –FS) 1.5 ppm/°C
Midscale Offset Error at 25°C ±0.29 %FS
Gain Error
(6)
at 25°C ±1.5 ±2.5 %FS
Gain Error Drift
(6)
32.3 ppm/°C
Gain Error
(7)
at 25°C ±0.75 ±1.5 %FS
Gain Error Drift
(7)
4.6 ppm/°C
Power Supply Rejection of Gain ∆ V
S
= ±5% 68 dB
REFT Tolerance Deviation from Ideal 3.5V ±10 ±25 mV
REFB Tolerance Deviation From Ideal 1.5V ±10 ±25 mV
External REFT Voltage Range REFB + 0.8 3.5 V
S
– 1.25 V
External REFB Voltage Range 1.25 1.5 REFT – 0.8 V
Reference Input Resistance 1.6 kΩ
POWER SUPPLY REQUIREMENTS
Supply Voltage: +V
S
Operating +4.75 +5.0 +5.25 V
Supply Current: +I
S
Operating 68 mA
Output Driver Supply Current (VDRV) 9mA
Power Dissipation: VDRV = 5V External Reference 340 385 mW
VDRV = 3V External Reference 325 mW
VDRV = 5V Internal Reference 355 mW
VDRV = 3V Internal Reference 345 mW
Power Down Operating 20 mW
Thermal Resistance,
θ
JA
SSOP-28 89 °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) Two-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 two-tone fundamental
envelope. (4) Effective number of bits (ENOB) is defined by (SINAD – 1.76)/6.02. (5) A 50kΩ pull-down resistor is inserted internally. (6) Includes internal
reference. (7) Excludes internal reference.