Datasheet
ADS7841
3
SBAS084B
✻ Same specifications as ADS7841E, P.
NOTE: (1) LSB means Least Significant Bit. With V
REF
equal to +5.0V, one LSB is 1.22mV. (2) First five harmonics of the test frequency. (3) Auto power-down mode
(PD1 = PD0 = 0) active or SHDN = GND.
ELECTRICAL CHARACTERISTICS: +5V
At T
A
= T
MIN
to T
MAX
, +V
CC
= +5V, V
REF
= +5V, f
SAMPLE
= 200kHz, and f
CLK
= 16 • f
SAMPLE
= 3.2MHz, unless otherwise noted.
PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS
ANALOG INPUT
Full-Scale Input Span
Positive Input - Negative Input
0V
REF
✻✻✻ ✻V
Absolute Input Range Positive Input –0.2
+V
CC
+0.2
✻✻✻ ✻V
Negative Input –0.2 +1.25 ✻✻✻ ✻V
Capacitance 25 ✻✻pF
Leakage Current 200 200 200 nA
SYSTEM PERFORMANCE
Resolution 12 ✻✻Bits
No Missing Codes 12 12 11 Bits
Integral Linearity Error ±2 ±1 2 LSB
(1)
Differential Linearity Error ±0.8 ±0.5 ±1 ±0.8 LSB
Offset Error ±3 ✻✻LSB
Offset Error Match 0.15 1.0 ✻✻ ✻✻LSB
Gain Error ±4 ±3 ±4 LSB
Gain Error Match 0.1 1.0 ✻✻ ✻✻LSB
Noise 30 ✻✻µVrms
Power-Supply Rejection 70 ✻✻dB
SAMPLING DYNAMICS
Conversion Time 12 ✻✻Clk Cycles
Acquisition Time 3 ✻✻Clk Cycles
Throughput Rate 200 ✻✻kHz
Multiplexer Settling Time 500 ✻✻ns
Aperture Delay 30 ✻✻ns
Aperture Jitter 100 ✻✻ps
DYNAMIC CHARACTERISTICS
Total Harmonic Distortion
(2)
V
IN
= 5Vp-p at 10kHz –78 –72 –80 –76 –78 –72 dB
Signal-to-(Noise + Distortion) V
IN
= 5Vp-p at 10kHz 68 71 70 72 68 71 dB
Spurious-Free Dynamic Range
V
IN
= 5Vp-p at 10kHz 72 79 76 81 72 79 dB
Channel-to-Channel Isolation V
IN
= 5Vp-p at 50kHz 120 ✻ 120 dB
REFERENCE INPUT
Range 0.1 +V
CC
✻✻✻ ✻V
Resistance DCLK Static 5 ✻✻GΩ
Input Current 40 100 ✻✻ ✻✻µA
f
SAMPLE
= 12.5kHz 2.5 ✻✻µA
DCLK Static 0.001 3 ✻✻ ✻✻µA
DIGITAL INPUT/OUTPUT
Logic Family CMOS ✻✻
Logic Levels
V
IH
| I
IH
| ≤ +5µA 3.0 5.5 ✻✻✻ ✻V
V
IL
| I
IL
| ≤ +5µA –0.3 +0.8 ✻✻✻ ✻V
V
OH
I
OH
= –250µA 3.5 ✻✻ V
V
OL
I
OL
= 250µA 0.4 ✻✻V
Data Format Straight Binary ✻✻
PWR SUPPLY REQUIREMENTS
+V
CC
Specified Performance
4.75 5.25 ✻✻✻ ✻V
Quiescent Current 550 900 ✻✻µA
f
SAMPLE
= 12.5kHz 300 ✻✻µA
Power-Down Mode
(3)
, CS = +V
CC
3 ✻✻µA
Power Dissipation 4.5 ✻✻mW
TEMPERATURE RANGE
Specified Performance –40 +85 ✻✻✻+125 °C
ADS7841E, P ADS7841EB, PB
ADS7841ES