Datasheet

2
®
ADS7824
SPECIFICATIONS
ELECTRICAL
At T
A
= –40°C to +85°C, f
S
= 40kHz, V
S1
= V
S2
= V
S
= +5V ±5%, using external reference, CONTC = 0V, unless otherwise specified.
ADS7824P, U ADS7824PB, UB
PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN
assumes no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject
to change without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not
authorize or warrant any BURR-BROWN product for use in life support devices and/or systems.
RESOLUTION 12 ✻
(1)
Bits
ANALOG INPUT
Voltage Range ±10V ✻ V
Impedance Channel On or Off 45.7 ✻ kΩ
Capacitance 35 ✻ pF
THROUGHPUT SPEED
Conversion Time 20 ✻ µs
Acquisition Time 5 ✻ µs
Multiplexer Settling Time Includes Acquisition 5 ✻ µs
Complete Cycle (Acquire and Convert) 25 ✻ µs
Complete Cycle (Acquire and Convert) CONTC = +5V 40 ✻ µs
Throughput Rate 40 ✻ kHz
DC ACCURACY
Integral Linearity Error ±0.15 ±1 ✻ ±0.5 LSB
(2)
Differential Linearity Error ±0.15 ±1 ✻ ±0.5 LSB
No Missing Codes
Guaranteed ✻
Transition Noise
(3)
0.1 ✻ LSB
Full Scale Error
(4)
Internal Reference ±0.5 ±0.25 %
Full Scale Error Drift Internal Reference ±7 ±5 ppm/°C
Full Scale Error
(4)
±0.5 ±0.25 %
Full Scale Error Drift ±2 ✻ ppm/°C
Bipolar Zero Error ±10 ✻ mV
Bipolar Zero Error Drift ±2 ✻ ppm/°C
Channel-to-Channel Mismatch ±0.1 ±0.1 %
Power Supply Sensitivity +4.75 < V
S
< +5.25 ±0.5 ✻ LSB
AC ACCURACY
Spurious-Free Dynamic Range
(5)
f
IN
= 1kHz 80 90 ✻✻ dB
Total Harmonic Distortion f
IN
= 1kHz –90 –80 ✻✻dB
Signal-to-(Noise+Distortion) f
IN
= 1kHz 70 73 72 ✻ dB
Signal-to-Noise f
IN
= 1kHz 70 73 72 ✻ dB
Channel Separation
(6)
f
IN
= 1kHz 90 100 ✻✻ dB
–3dB Bandwidth 2 ✻ MHz
Useable Bandwidth
(7)
90 ✻ kHz
SAMPLING DYNAMICS
Aperture Delay 40 ✻ ns
Transient Response
(8)
FS Step 5 ✻ µs
Overvoltage Recovery
(9)
1 ✻ µs
REFERENCE
Internal Reference Voltage 2.48 2.5 2.52 ✻✻ ✻ V
Internal Reference Source Current 1 ✻ µA
(Must use external buffer)
External Reference Voltage Range 2.3 2.5 2.7 ✻✻ ✻ V
for Specified Linearity
External Reference Current Drain V
REF
= +2.5V 100 ✻ µA
DIGITAL INPUTS
Logic Levels
V
IL
–0.3 +0.8 ✻✻V
V
IH
+2.4 V
S
+0.3V ✻✻V
I
IL
±10 ✻ µA
I
IH
±10 ✻ µA
DIGITAL OUTPUTS
Data Format Parallel in two bytes; Serial ✻
Data Coding Binary Two's Complement ✻
V
OL
I
SINK
= 1.6mA +0.4 ✻ V
V
OH
I
SOURCE
= 500µA+4 ✻ V
Leakage Current High-Z State, V
OUT
= 0V to V
S
±5 ✻ µA
Output Capacitance High-Z State 15 ✻ pF