MAX972 Maxim, MAX972 Datasheet
MAX972
Available stocks
Related parts for MAX972
MAX972 Summary of contents
Page 1
... The MAX971–MAX974 and MAX981–MAX984 single/ dual/quad low-voltage comparators feature the lowest power consumption available. These micropower devices draw less than 4µA supply current over temperature (MAX971/MAX972/MAX981/MAX982), and include an internal 1.182V ±1% (MAX971/MAX973/ MAX974) or ±2% (MAX981–MAX984) voltage reference and programmable hysteresis. ...
Page 2
... Lead Temperature (soldering, 10s) .................................+300°C Bump Temperature (soldering) Reflow ..........................................................................+235°C , unless otherwise noted. Typical values are at T MAX CONDITIONS T = +25°C MAX9_1, A HYST = REF C/E temp ranges T = +25°C A MAX972 C/E temp ranges MAX982 +25°C A MAX9_3, C/E temp ranges HYST = REF T = +25°C A MAX9_4 C/E temp ranges = 2.5V ...
Page 3
... C temp range E temp range = +25° +25° unless otherwise noted. Typical values are at T MAX CONDITIONS T = +25°C A MAX9_1 C/E temp ranges T = +25°C A MAX972 HYST = REF, C/E temp ranges IN+ = (IN +25°C MAX982/ A 100mV) MAX9_3 C/E temp ranges T = +25°C A MAX9_4 C/E temp ranges ...
Page 4
... C/E temp ranges Voltage Noise 100Hz to 100kHz Note 1: The MAX972EBL is 100% tested at T Note 2: MAX974/MAX984 comparators work below 2.5V; see Low-Voltage Operation section for more details. Note 3: Low-to-high response time is the result of the 1M pullup and the 100pF capacitive load, based on three time constants. ...
Page 5
... OUTPUT LOAD CURRENT 1.190 SINK 1.185 1.180 SOURCE 1.175 1.170 1.165 1.160 1.155 OUTPUT LOAD CURRENT ( A) MAX972 SUPPLY CURRENT vs. TEMPERATURE 4.5 IN+ = (IN- + 100mV) 4.0 3 10V 3 1.5 140 -60 - 100 TEMPERATURE ( C) MAX9_4 SUPPLY CURRENT vs. ...
Page 6
... Ultra-Low-Power, Open-Drain, Single/Dual-Supply Comparators ( GND = 0V +25°C, unless otherwise noted.) A MAX9_1/MAX972/MAX9_4 TRANSFER FUNCTION 5.0 +5V 4.5 10k 100k 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 -0.3 -0.1 0.1 0.2 -0.2 0 IN+ INPUT VOLTAGE (mV) RESPONSE TIME AT LOW SUPPLY VOLTAGES (V OHL 1000 R = 10k PULLUP 100 -20mV 10 -100mV 1 1.0 1.2 1.4 1.6 1.8 2.0 2.2 SINGLE-SUPPLY VOLTAGE (V) 6 _______________________________________________________________________________________ Typical Operating Characteristics (continued) RESPONSE TIME vs ...
Page 7
... PIN MAX971/ MAX972 MAX982 MAX981 DIP/SO/ DIP/SO/ DIP/SO/ UCSP µMAX µMAX µMAX 1 — — — — — — 4 — — — 5 — — — — — — — — — — — ...
Page 8
Ultra-Low-Power, Open-Drain, Single/Dual-Supply Comparators PIN NAME MAX974 MAX984 1 OUTB 2 OUTA INA- 5 INA+ 6 INB- 7 INB+ 8 REF INC- 11 INC+ 12 IND- 13 IND+ 14 GND 15 OUTD 16 OUTC ...
Page 9
... It also produces faster hysteresis action and consumes much less current than circuits using external positive feedback. MAX972 1 (A1) OUTA 2 (C2 (C1) INA+ 4 (B1) INA BUMPS FOR THE UCSP Figure 1a. MAX972 Functional Diagram MAX982 1 OUTA INA+ 4 INB+ V- Figure 1b. MAX982 Functional Diagram _______________________________________________________________________________________ ...
Page 10
... The Typical Operating Characteristics show the propagation delay for various overdrive levels. The open-drain outputs are intended for wire-ORed and level-shifting applications. The maximum output voltage is 11V above V-, and may be applied even when no supply voltage is present (V+ = V-). The MAX9_1 and MAX9_4 outputs sink current to GND, making these devices ideal for bipolar to single-ended conversion and level-shifting applications ...
Page 11
... HB When hysteresis is obtained in this manner for the MAX982/MAX9_3, the same hysteresis applies to both comparators. Hysteresis (MAX972/MAX9_4) Hysteresis can be implemented with any comparator using positive feedback, as shown in Figure 4. This approach generally draws more current than circuits using the HYST pin on the MAX9_1/MAX982/MAX9_3, and the high feedback impedance slows hysteresis ...
Page 12
Ultra-Low-Power, Open-Drain, Single/Dual-Supply Comparators 2) Select R1. The leakage current into INB- is normally under 1nA, so the current through R1 should exceed 100nA for the thresholds to be accurate. R1 values up to about 10M can be used, but ...
Page 13
... Maxim’s web site at www.maxim-ic.com/ucsp to find the Application Note: UCSP–A Wafer-Level Chip-Scale Package. ______________________________________________________________________________________ Ultra-Low-Power, Open-Drain, Single/Dual-Supply Comparators 3 ...
Page 14
... TOP VIEW (BUMPS ON BOTTOM OUTA V+ OUTB B INA- MAX972 INB- C INA+ V- INB+ UCSP 14 ______________________________________________________________________________________ OUTA 1 8 OUTB MAX972 INA INB+ INA INB- DIP/SO/ MAX OUTA 1 8 OUTB MAX973 INA REF MAX983 INB HYST ...
Page 15
... C to +85 C MAX971ESA - +85 C MAX972CPA +70 C MAX972CSA +70 C MAX972CUA +70 C MAX972EBL-T* - +85 C MAX972EPA - +85 C MAX972ESA - +85 C MAX973CPA +70 C MAX973CSA +70 C MAX973CUA +70 C MAX973EPA - +85 C MAX973ESA - +85 C MAX974CPE +70 C ...
Page 16
... Ultra-Low-Power, Open-Drain, Single/Dual-Supply Comparators (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) 16 ______________________________________________________________________________________ Package Information ...
Page 17
... For the latest package outline information www.maxim-ic.com/packages.) Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. ...