Datasheet

MAX1191
Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
DD
= 3.0V, OV
DD
= 1.8V, V
REFIN
= V
DD
(internal reference), C
L
≈ 10pF at digital outputs, f
CLK
= 7.5MHz, C
REFP
= C
REFN
= C
COM
= 0.33µF, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
V
DD
, OV
DD
to GND ...............................................-0.3V to +3.6V
OGND to GND.......................................................-0.3V to +0.3V
INA+, INA-, INB+, INB- to GND .................-0.3V to (V
DD
+ 0.3V)
CLK, REFIN, REFP, REFN, COM to GND ...-0.3V to (V
DD
+ 0.3V)
PD0, PD1 to OGND .................................-0.3V to (OV
DD
+ 0.3V)
Digital Outputs to OGND.........................-0.3V to (OV
DD
+ 0.3V)
Continuous Power Dissipation (T
A
= +70°C)
28-Pin Thin QFN (derated 20.8mW/°C above +70°C) ...1667mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DC ACCURACY
Resolution 8 Bits
Integral Nonlinearity INL ±0.15 ±1.00 LSB
Differential Nonlinearity DNL No missing codes over temperature ±0.13 ±1.00 LSB
≥+25°C ±4
Offset Error
<+25°C ±6
%FS
Gain Error Excludes REFP - REFN error ±2 %FS
DC Gain Matching ±0.01 ±0.2 dB
Gain Temperature Coefficient ±30 ppm/°C
Offset (V
DD
±5%) ±0.2
Power-Supply Rejection
Gain (V
DD
±5%) ±0.05
LSB
ANALOG INPUT
Differential Input Voltage Range V
DIFF
Differential or single-ended inputs ±0.512 V
Common-Mode Input Voltage
Range
V
COM
V
DD
/ 2 V
Input Resistance R
IN
Switched capacitor load 720 kΩ
Input Capacitance C
IN
5pF
CONVERSION RATE
Maximum Clock Frequency f
CLK
7.5 MHz
Channel A 5.0
Data Latency
Channel B 5.5
Clock
cycles
DYNAMIC CHARACTERISTICS (differential inputs, 4096 point FFT)
f
IN
= 1.875MHz 47 48.7
Signal-to-Noise Ratio
(Note 2)
SNR
f
IN
= 3.75MHz 48.6
dB
f
IN
= 1.875MHz 47 48.6
Signal-to-Noise and Distortion
(Note 2)
SINAD
f
IN
= 3.75 48.5
dB