Rainbow Electronics MAX1464 - Manual (Page 5)

MAX1464
Low-Power, Low-Noise Multichannel
Sensor Signal Processor
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PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
LARGE OP AMP
Input Offset Voltage V OS _ LG 0 ±6 mV
Input Bias Current I B _ LG ±225 nA
DC Gain A VOL _ LG
OUTnLG = 0.5V to 4.5V (n = 1 or 2),
R
LOAD = ∞
100 dB
Gain Bandwidth Product GBW_ LG A VOL_LG = +1V/V 4.0 MHz
Slew Rate SR_ LG A VOL_LG = +1V/V 3.2 V/µs
Common-Mode Input Range CMR_ LG V SS + 0.02 V DD - 0.02 V
Common-Mode Rejection Ratio CMRR_ LG V CM OPAMP = V SS to V DD 70 dB
Power-Supply Rejection Ratio PSRR_ LG At DC 70 dB
0.1Hz to 1kHz 19
Input-Referred Noise Voltage V N _ LG
0.1Hz to 1MHz 160
µV RMS
R LOAD = ∞ V DD - 0.1
Output-Voltage High V OH _ LG
R LOAD = 1k Ω to V
SS V DD - 0.125
V
R LOAD = ∞ 0.03
Output-Voltage Low V OL _ LG
R LOAD = 1k Ω to V
DD 0.13
V
Output Source Current I SRC _ LG V OUTnLG = V OH_LG , R LOAD = 1k Ω to V
SS -4.9 mA
Output Sink Current I SNK _ LG V OUTnLG = V OL_LG , R LOAD = 1k Ω to V
DD 4.9 mA
Maximum Output Load
Capacitance
C L _ LG R LOAD = ∞, phase margin > 55° 200 pF
OP-AMP SWITCH
Analog Signal Range V SW V SS V DD V
On-Resistance R ON 5 k Ω
Off-Isolation V ISO 80 dB
DIGITAL-TO-ANALOG CONVERTER
Resolution RES DAC 16 Bits
Integral Nonlinearity INL DAC 3 Bits
Differential Nonlinearity DNL
DAC
±1 Bits
Offset Error V DAC OS DAC ref = V DD , DAC data = 0000h
V DD / 2
- 0.06
V DD / 2
+ 0.06
V
Bit Weight BW DAC DAC ref = 5VDC 91.55 µV/LSB
Power-Supply Rejection PSR DAC At DC, DAC ref = V REF 0.02 %FS
Output Noise ON DAC DAC buffer is the small op amp ±3 LSB
Output Settling Time ST DAC To 0.1% of final value 250 µs
PULSE-WIDTH MODULATOR
Resolution RES PWM (Note 6) 12 Bits
Period P PWM f CLK = 4.0MHz 8.192 ms
ELECTRICAL CHARACTERISTICS (continued)
(V DDF = V DD = 4.5V to 5.5V, V SSF = V SS = 0V, f CLK = 4.0MHz, T A = T MIN to T MAX . Typical values are at V DDF = V DD = 5.0V, V SSF = V SS = 0V,
T A = +25°C, unless otherwise noted.) (Note 1)