Datasheet

ADS7852
SBAS111C
3
ELECTRICAL CHARACTERISTICS
At T
A
= –40°C to +85°C, f
S
= 500kHz, f
CLK
= 16 • f
S
, and V
SS
= +5V, using internal reference, unless otherwise specified.
ADS7852Y ADS7852YB
PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
RESOLUTION 12 ✻ Bits
ANALOG INPUT
Input Voltage Range 0 5 ✻✻V
Input Impedance 5M ✻ Ω
Input Capacitance 15 ✻ pF
Input Leakage Current ±1 ✻ µA
DC ACCURACY
No Missing Codes 12 ✻ Bits
Integral Linearity Error ±2 ±1 LSB
(1)
Differential Linearity Error ±1 ±0.5 ±1 LSB
Offset Error ±2 ±5 ±1 ✻ LSB
Offset Error Drift ±4 ✻ ppm/°C
Offset Error Match ±1 ✻ LSB
Gain Error
(1)
Ext Ref = 2.5000V ±15 ±10 LSB
Gain Error Int Ref ±40 ±25 LSB
Gain Error Drift ±25 ✻ ppm/°C
Gain Error Match ±1 ✻ LSB
Noise 150 ✻ µVrms
Power Supply Rejection Ratio Worst-Case ∆, +V
SS
= 5V ±5% 1.2 ✻ LSB
SAMPLING DYNAMICS
Conversion Time 13.5 ✻ Clk Cycles
Acquisition Time 1.5 ✻ Clk Cycles
Throughput Rate 500 ✻ kHz
Multiplexer Settling Time 500 ✻ ns
Aperture Delay 5 ✻ ns
Aperture Jitter 30 ✻ ps
AC ACCURACY
Signal-to-Noise Ratio 72 ✻ dB
Total Harmonic Distortion
(3)
V
IN
= 5Vp-p at 50kHz –74 –72 –77 –76 dB
Signal-to-(Noise+Distortion) V
IN
= 5Vp-p at 50kHz 68 70 71 72 dB
Spurious Free Dynamic Range V
IN
= 5Vp-p at 50kHz 76 74 78 77 dB
Channel-to-Channel Isolation V
IN
= 5Vp-p at 50kHz 95 ✻ dB
REFERENCE OUTPUT
Internal Reference Voltage 2.48 2.50 2.52 ✻✻✻ V
Internal Reference Drift 30 ✻ ppm/°C
Input Impedance CS = GND 5 ✻ GΩ
CS = V
SS
5 ✻ GΩ
Source Current
(4)
Static Load 50 ✻ µA
REFERENCE INPUT
Range 2.0 2.55 ✻✻V
Resistance
(5)
to Internal Reference Voltage 10 ✻ kΩ
DIGITAL INPUT/OUTPUT
Logic Family CMOS ✻
Logic Levels:
V
IH
I
IH
= +5µA3+V
SS
+ 0.3 ✻✻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 ✻
POWER SUPPLY REQUIREMENT
+V
SS
Specified Performance 4.75 5.25 ✻✻V
Quiescent Current 2.6 3.5 ✻✻ mA
Normal Power 13 17.5 ✻✻ mW
Nap Mode Current
(6)
600 800 ✻✻ µA
Sleep Mode Current
(6)
10 30 ✻✻ µA
TEMPERATURE RANGE
Specified Performance –40 +85 ✻✻°C
Storage –65 +150 ✻✻°C
✻ Specifications same as ADS7852Y.
NOTES: (1) LSB means Least Significant Bit, with V
REF
equal to +2.5V, one LSB is 1.22mV. (2) Measured relative to an ideal, full-scale input of 4.999V. Thus,
gain error includes the error of the internal voltage reference. (3) Calculated on the first nine harmonics of the input frequency. (4) If the internal reference is required
to source current to an external load, the reference voltage will change due to the internal 10kΩ resistor. (5) Can vary ±30%. (6) See Timing Characteristics for
further detail.