SPECIFICATION: +5V
At TA = –40°C to +85°C, +VCC = +5V, VREF = +5V, fSAMPLE = 200kHz, and fCLK = 16 • fSAMPLE = 3.2MHz, unless otherwise noted.
ADS7844E, N
TYP
ADS7844EB, NB
PARAMETER
CONDITIONS
MIN
MAX
MIN
TYP
MAX
UNITS
ANALOG INPUT
Full-Scale Input Span
Absolute Input Range
Positive Input - Negative Input
Positive Input
0
–0.2
–0.2
VREF
+VCC +0.2
+1.25
✻
✻
✻
✻
✻
✻
V
V
V
Negative Input
Capacitance
Leakage Current
25
±1
✻
✻
pF
µA
SYSTEM PERFORMANCE
Resolution
No Missing Codes
Integral Linearity Error
Differential Linearity Error
Offset Error
Offset Error Match
Gain Error
Gain Error Match
Noise
12
✻
Bits
Bits
12
✻
±2
±1
±1
✻
✻
±3
✻
LSB(1)
LSB
LSB
LSB
LSB
LSB
µVrms
dB
±0.8
±0.5
±3
1.0
±4
0.15
✻
0.1
30
70
1.0
✻
✻
✻
Power Supply Rejection
SAMPLING DYNAMICS
Conversion Time
Acquisition Time
Throughput Rate
Multiplexer Settling Time
Aperture Delay
12
✻
✻
Clk Cycles
Clk Cycles
3
✻
200
kHz
ns
ns
500
30
100
✻
✻
✻
Aperture Jitter
ps
DYNAMIC CHARACTERISTICS
Total Harmonic Distortion(2)
Signal-to-(Noise + Distortion)
Spurious Free Dynamic Range
Channel-to-Channel Isolation
VIN = 5Vp-p at 10kHz
VIN = 5Vp-p at 10kHz
VIN = 5Vp-p at 10kHz
VIN = 5Vp-p at 50kHz
–76
71
76
–78
72
78
✻
dB
dB
dB
dB
120
REFERENCE INPUT
Range
Resistance
0.1
+VCC
100
3
✻
✻
✻
✻
V
DCLK Static
5
45
2.5
✻
✻
✻
✻
GΩ
µA
µA
µA
Input Current
fSAMPLE = 12.5kHz
DCLK Static
0.001
DIGITAL INPUT/OUTPUT
Logic Family
Logic Levels
VIH
VIL
VOH
CMOS
✻
| IIH | ≤ +5µA
| IIL | ≤ +5µA
IOH = –250µA
IOL = 250µA
3.0
–0.3
3.5
5.5
+0.8
✻
✻
✻
✻
✻
V
V
V
V
VOL
0.4
✻
Data Format
Straight Binary
✻
✻
POWER SUPPLY REQUIREMENTS
+VCC
Quiescent Current
Specified Performance
4.75
5.25
900
✻
✻
✻
V
550
300
µA
µA
µA
mW
fSAMPLE = 12.5kHz
Power-Down Mode(3), CS = +VCC
3
✻
✻
Power Dissipation
4.5
TEMPERATURE RANGE
Specified Performance
–40
+85
✻
✻
°C
✻ Same specifications as ADS7844E, ADS7844N.
NOTE: (1) LSB means Least Significant Bit. With VREF 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.
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.
®
ADS7844
2
BB [ BURR-BROWN CORPORATION ]
