Datasheet
ADS7813
3
SBAS043C
www.ti.com
SAMPLING DYNAMICS
Aperture Delay 40 ✻ ns
Aperture Jitter 20 ✻ ps
Transient Response FS Step 5 ✻ µs
Overvoltage Recovery
(7)
750 ✻ ns
REFERENCE
Internal Reference Voltage 2.48 2.5 2.52 ✻✻✻ V
Internal Reference Source Current 100 ✻ µA
Internal Reference Drift 8 ✻ ppm/°C
External Reference Voltage Range 2.3 2.5 2.7 ✻✻ ✻ V
External Reference Current Drain V
REF
= +2.5V 100 ✻ µA
CAP Compensation Capacitors ESR
(8)
3 ✻ Ω
DIGITAL INPUTS
Logic Levels
V
IL
–0.3 +0.8 ✻✻V
V
IH
(9)
+2.0 V
S
+0.3V ✻✻V
I
IL
±10 ✻ µA
I
IH
±10 ✻ µA
DIGITAL OUTPUTS
Data Format
Data Coding
V
OL
I
SINK
= 1.6mA +0.4 ✻ V
V
OH
I
SOURCE
= 500µA+4 ✻ V
Leakage Current High-Z State, ±1 ✻ µA
V
OUT
= 0V to V
S
Output Capacitance High-Z State 15 15 pF
POWER SUPPLY
V
S
+4.75 +5 +5.25 ✻✻✻ V
Power Dissipation f
S
= 40kHz 35 ✻ mW
TEMPERATURE RANGE
Specified Performance –40 +85 ✻✻ °C
Derated Performance –55 +125 ✻✻ °C
✻ Same specification as grade to the left.
NOTES:
ELECTRICAL CHARACTERISTICS (Cont.)
At T
A
= –40°C to +85°C, f
S
= 40kHz, V
S
= +5V ±5%, using internal reference, unless otherwise specified.
ADS7813P, U ADS7813PB, UB
PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
Serial
Binary Two’s Complement
(1) LSB means Least Significant Bit. For the ±10V input range, one LSB is 305µV.
(2) Typical rms noise at worst case transitions and temperatures.
(3) Full scale error is the worst case of –Full Scale or +Full Scale untrimmed deviation from ideal first and last code transitions, divided by the
transition voltage (not divided by the full-scale range) and includes the effect of offset error.
(4) After the ADS7813 is initially powered on and fully settles, this is the time delay after it is brought out of Power Down Mode until all internal
settling occurs and the analog input is acquired to rated accuracy, and normal conversions can begin again.
(5) All specifications in dB are referred to a full-scale input.
(6) Useable Bandwidth defined as Full-Scale input frequency at which Signal-to-(Noise+Distortion) degrades to 60dB, or 10 bits of accuracy.
(7) Recovers to specified performance after 2 x FS input overvoltage.
(8) ESR = total equivalent series resistance for the compensation capacitors.
(9) The minimum V
IH
level for the DATACLK signal is 3V.