MAX187/MAX189
+5V, Low-Power, 12-Bit Serial ADCs
2
Maxim Integrated
VDD to GND .............................................................-0.3V to +6V
AIN to GND................................................-0.3V to (VDD + 0.3V)
REF to GND ...............................................-0.3V to (VDD + 0.3V)
Digital Inputs to GND.................................-0.3V to (VDD + 0.3V)
Digital Outputs to GND..............................-0.3V to (VDD + 0.3V)
SHDN to GND.............................................-0.3V to (VDD + 0.3V)
REF Load Current (MAX187) .........................4.0mA Continuous
REF Short-Circuit Duration (MAX187)......................... ... .......20s
DOUT Current..................................................................Q20mA
Continuous Power Dissipation (TA = +70NC)
8-Pin PDIP (derate 9.1mW/NC above +70NC)..............727mW
16-Pin Wide SO (derate 14.5mW/NC above 70NC).....1157mW
Operating Temperature Ranges
MAX187_C_ _/MAX189_C_ _..............................0NC to +70NC
MAX187_E_ _/MAX189_E_ _...........................-40NC to +85NC
Storage Temperature Range.............................-60NC to +150NC
Lead Temperature (soldering, 10s) .................................+300NC
Soldering Temperature (reflow) .......................................+260NC
ABSOLuTE MAXIMuM RATINgS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional opera-
tion 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.
ELECTRICAL CHARACTERISTICS
(VDD = +5V ±5%; VGND = 0V; unipolar input mode; 75ksps, fCLK = 4.0MHz, external clock (50% duty cycle); MAX187—internal refer-
ence: VREF = 4.096V, 4.7F capacitor at REF pin, or MAX189—external reference: VREF = 4.096V applied to REF pin, 4.7F capacitor
at REF pin; TA = TMIN to TMAX; unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
uNITS
DC ACCuRACY (Note 1)
Resolution
12
Bits
Relative Accuracy (Note 2)
MAX18_A
Q
LSB
MAX18_B
Q
1
MAX18_C
Q
2
Differential Nonlinearity
DNL
No missing codes over temperature
Q
1
LSB
Offset Error
MAX18_A
Q
1
LSB
MAX18_B/C
Q
3
Gain Error (Note 3)
MAX187
Q
3
LSB
MAX189A
Q
1
MAX189B/C
Q
3
Gain Temperature Coefficient
External reference, 4.096V
Q
0.8
ppm/NC
DYNAMIC SPECIFICATIONS (10kHz Sine Wave Input, 0 to 4.096VP-P, 75ksps)
Signal-to-Noise Plus
Distortion Ratio
SINAD
70
dB
Total Harmonic Distortion
(Up to the 5th Harmonic)
THD
-80
dB
Spurious-Free Dynamic Range
SFDR
80
dB
Small-Signal Bandwidth
Rolloff -3dB
4.5
MHz
Full-Power Bandwidth
0.8
MHz
CONVERSION RATE
Conversion Time
tCONV
5.5
8.5
F
s
Track/Hold Acquisition Time
tACQ
1.5
F
s
Throughput Rate
External clock, 4MHz, 13 clocks
75
ksps