Datasheet
ADS804
3
SBAS068B
www.ti.com
ELECTRICAL CHARACTERISTICS (Cont.)
At T
A
= full specified temperature range, V
S
= +5V, specified single-ended input range = 1.5V to 3.5V, and sampling rate = 10MHz, unless otherwise specified.
DIGITAL INPUTS
Logic Family
Convert Command Start Conversion
High Level Input Current (V
IN
= 5V)
(5)
100 µA
Low Level Input Current (V
IN
= 0V) 10 µA
High Level Input Voltage +3.5 V
Low Level Input Voltage +1.0 V
Input Capacitance 5pF
DIGITAL OUTPUTS
Logic Family
Convert Command
Output Voltages, V
DRV
= +5V
Low Level I
OL
= 50µA +0.1 V
High Level I
OH
= 50µA ±4.6 V
Low Level I
OL
= 1.6mA +0.4 V
High Level I
OH
= 0.5mA ±2.4 V
Output Voltages, V
DRV
= +3V
Low Level I
OL
= 50µA +0.1 V
High Level I
OH
= 50µA +2.5 V
3-State Enable Time OE = L 20 40 ns
3-State Disable Time OE = H 2 10 ns
Output Capacitance 5pF
ACCURACY (5Vp-p Input Range) f
S
= 2.5MHz
Zero Error (Referred to –FS) At 25°C 0.2 ±1.5 %FS
Zero Error Drift ±5 ppm/°C
Gain Error
(6)
At 25°C ±2.0 %FS
Gain Error Drift
(6)
±15 ppm/°C
Gain Error
(7)
At 25°C ±1.5
%FS
Gain Error Drift
(7)
±15 ppm/°C
Power-Supply Rejection of Gain ∆V
S
= ±5% 60 82 dB
Reference Input Resistance 1.6 kΩ
Internal Voltage Reference Tolerance (V
REF
= 2.5V) At 25°C ±35 mV
Internal Voltage Reference Tolerance (V
REF
= 1.0V) At 25°C ±14 mV
POWER-SUPPLY REQUIREMENTS
Supply Voltage: +V
S
+4.7 +5.0 +5.3 V
Supply Current: +I
S
36 40 mA
Power Dissipation 180 200 mW
Thermal Resistance,
θ
JA
SSOP-28 50 °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 (SINAD – 1.76)/6.02. (5) Internal 50kΩ pull-down resistor. (6) Includes internal reference. (7) Excludes internal
reference.
ADS804E
PARAMETER CONDITIONS MIN TYP MAX UNITS
CMOS/TTL Compatible
Straight Offset Binary
CMOS Compatible
Rising Edge of Convert Clock