MAX1270BEAI Maxim Integrated Products, MAX1270BEAI Datasheet
MAX1270BEAI
Available stocks
Related parts for MAX1270BEAI
MAX1270BEAI Summary of contents
Page 1
... SSOP MAX1270BCAI 0°C to +70°C 28 SSOP Ordering Information continued at end of data sheet. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. Multirange, +5V, 8-Channel, ♦ 12-Bit Resolution, 0.5 LSB Linearity ♦ +5V Single-Supply Operation ♦ ...
Page 2
Multirange, +5V, 8-Channel, Serial 12-Bit ADCs ABSOLUTE MAXIMUM RATINGS V to AGND............................................................-0.3V to +6V DD AGND to DGND.....................................................-0.3V to +0.3V CH0–CH7 to AGND ......................................................... ±16.5V REF, REFADJ to AGND ..............................-0. SSTRB, DOUT to DGND.............................-0. SHDN, CS, ...
Page 3
ELECTRICAL CHARACTERISTICS (continued +5.0V ±5%; unipolar/bipolar range; external reference mode 50% duty cycle (MAX127_B 1.8MHz, 50% duty cycle (MAX127_A); 18 clock/conversion cycle, T CLK otherwise noted. Typical values are T A PARAMETER SYMBOL ANALOG ...
Page 4
Multirange, +5V, 8-Channel, Serial 12-Bit ADCs ELECTRICAL CHARACTERISTICS (continued +5.0V ±5%; unipolar/bipolar range; external reference mode 50% duty cycle (MAX127_B 1.8MHz, 50% duty cycle (MAX127_A); 18 clock/conversion cycle, T CLK otherwise noted. Typical values ...
Page 5
ELECTRICAL CHARACTERISTICS (continued +5.0V ±5%; unipolar/bipolar range; external reference mode 50% duty cycle (MAX127_B 1.8MHz, 50% duty cycle (MAX127_A); 18 clock/conversion cycle, T CLK otherwise noted. Typical values are T A PARAMETER SYMBOL Conversion ...
Page 6
Multirange, +5V, 8-Channel, Serial 12-Bit ADCs TIMING CHARACTERISTICS (V = +4.75V to +5.25V; unipolar/bipolar range; external reference mode 2.0MHz (MAX127_B 1.8MHz (MAX127_A); T CLK (Figures 10) PARAMETER SYMBOL DIN to SCLK Setup DIN ...
Page 7
Operating Circuit +5V; external reference mode 110ksps +25°C, unless otherwise noted.) A SUPPLY CURRENT vs. SUPPLY VOLTAGE SUPPLY VOLTAGE (V) ...
Page 8
Multirange, +5V, 8-Channel, Serial 12-Bit ADCs (Typical Operating Circuit +5V; external reference mode 110ksps +25°C, unless otherwise noted.) A AVERAGE SUPPLY CURRENT vs. CONVERSION RATE (USING STANDBY 5V, INTERNAL REFERENCE, DD ...
Page 9
Figure 1. Reference-Adjust Circuit Detailed Description Converter Operation The MAX1270/MAX1271 multirange, fault-tolerant ADCs use successive approximation and internal track/hold (T/H) circuitry to convert an analog signal to a 12-bit digital output. Figure 3 shows the ...
Page 10
Multirange, +5V, 8-Channel, Serial 12-Bit ADCs Input Bandwidth The ADC’s input small-signal bandwidth depends on the selected input range and varies from 1.5MHz to 5MHz (see Electrical Characteristics). The MAX1270B/ MAX1271B maximum sampling rate is 110ksps (100ksps for the MAX1270A/MAX1271A). ...
Page 11
Table 1. Control-Byte Format BIT 7 BIT 6 BIT 5 (MSB) START SEL2 SEL1 BIT NAME First logic 1 after CS goes low defines the beginning of the control byte. 7 (MSB) START SEL2, SEL1 These 3 ...
Page 12
Multirange, +5V, 8-Channel, Serial 12-Bit ADCs Input data (control byte) is clocked in at DIN at the ris- ing edge of SCLK. CS enables communication with the MAX1270/MAX1271. After CS falls, the first arriving logic 1 bit represents the start ...
Page 13
CS t SDV SSTRB HIGH-Z SCLK Figure 7. External Clock Mode—SSTRB Detailed Timing CS SCLK 1 8 CONTROL BYTE 0 MSB LSB START SEL2 SEL1 SEL0 RNG BIP PD1 PD0 DIN 18 SCLK HIGH-Z SSTRB HIGH-Z DOUT ACQUISITION A/D STATE ...
Page 14
Multirange, +5V, 8-Channel, Serial 12-Bit ADCs CS SCLK 1 DIN START SEL2 SEL1 SEL0 RNG MSB SSTRB HIGH-Z DOUT A/D STATE Figure 9. Internal Clock Mode—20 SCLK/Conversion Timing CS t CSH SSTRB SCLK SCLK #8 Figure 10. Internal Clock Mode—SSTRB ...
Page 15
SCLK CONTROL BYTE Ø START SEL2 SEL1 SEL0 RNG BIP PD1 PD0 DIN 13 SCLK SSTRB HIGH-Z DOUT ACQUISITION CONVERSION A/D STATE Figure 11. Internal Clock Mode—13 Clocks/Conversion Timing CS SCLK 1 8 CONTROL BYTE Ø START ...
Page 16
Multirange, +5V, 8-Channel, Serial 12-Bit ADCs REF MAX1270 MAX1271 A = 1.638 V REFADJ 10kΩ 2.5V Figure 13a. Internal Reference REF MAX1270 MAX1271 A = 1.638 V REFADJ 10kΩ 2.5V Figure 13b. External Reference—Reference at REF REF MAX1270 MAX1271 A ...
Page 17
OUTPUT CODE FULL-SCALE 11... 111 TRANSITION 11... 110 11... 101 00... 011 00... 010 00... 001 00... 000 INPUT VOLTAGE (LSB) Figure 14a. Unipolar Transfer Function Transfer Function Output data coding for the MAX1270/MAX1271 is bina- ...
Page 18
... Ordering Information (continued) PART TEMP RANGE PIN-PACKAGE MAX1270AENG -40°C to +85°C 24 Narrow PDIP MAX1270BENG -40°C to +85°C 24 Narrow PDIP MAX1270AEAI -40°C to +85°C 28 SSOP MAX1270BEAI -40°C to +85°C 28 SSOP MAX1271ACNG 0°C to +70°C 24 Narrow PDIP MAX1271BCNG 0°C to +70°C 24 Narrow PDIP MAX1271ACAI 0° ...
Page 19
For the latest package outline information go to www.maxim-ic.com/packages.) ______________________________________________________________________________________ Multirange, +5V, 8-Channel, Serial 12-Bit ADCs Package Information 19 ...
Page 20
... 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. 20 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2004 Maxim Integrated Products Package Information (continued) ...