MAX1149BEUP+ Maxim Integrated Products, MAX1149BEUP+ Datasheet - Page 14

• Manufacturer Part Number: MAX1149BEUP+
• Description: IC ADC 14BIT 116KSPS 20-TSSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX1149BEUP+

• Number Of Bits: 14
• Sampling Rate (per Second): 116k
• Data Interface: MICROWIRE™, QSPI™, Serial, SPI™
• Number Of Converters: 1
• Power Dissipation (max): 879mW
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-TSSOP
• Number Of Adc Inputs: 8
• Architecture: SAR
• Conversion Rate: 116 KSPs
• Resolution: 14 bit
• Interface Type: Serial
• Voltage Reference: Internal 2.5 V or External
• Supply Voltage (max): 3.3 V
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Multichannel, True-Differential,
Serial, 14-Bit ADCs
Figure 7. Quick-Look Circuit
Table 1. Control Byte Format
*The start bit resets power-down modes.
14
7 (MSB)
0 (LSB)
BIT
6
5
4
3
2
1
______________________________________________________________________________________
A
SGL/DIF
UNI/BIP
V
START
IN
NAME
REF
SEL2
SEL1
SEL0
PD1
PD0
MAX1149 V
MAX1148 V
10Ω
0.01µF
0.01µF
2.2µF
REF
REF
Start bit. The first logic 1 bit after CS goes low defines the beginning of the control byte.
Channel-select bits. The channel-select bits select which of the eight channels are used for the conversion
(Tables 2, 3, 4, and 5).
1 = single ended, 0 = differential. Selects single-ended or differential conversions. In single-ended mode,
input signal voltages are referred to COM. In differential mode, the voltage difference between two channels
is measured.
1 = unipolar, 0 = bipolar. Selects unipolar or bipolar conversion mode. In unipolar mode, connect COM to
AGND to perform conversion from 0 to V
from 0 to V
Selects clock and power-down modes.
PD1 = 0 and PD0 = 0 selects full power-down mode*.
PD1 = 0 and PD0 = 1 selects fast power-down mode*.
PD1 = 1 and PD0 = 0 selects internal clock mode.
PD1 = 1 and PD0 = 1 selects external clock mode.
= +2.500V
= +4.096V
CH7
REFADJ
REF
REF
MAX1148
MAX1149
V
COM
. See Table 7.
≤ A
IN
≤ V
SSTRB
DGND
SHDN
DOUT
AGND
SCLK
COM
REF
V
DIN
CS
DD
0.1µF
REF
EXTERNAL CLOCK
. In bipolar mode, connect COM to V
*FULL-SCALE ANALOG INPUT, CONVERSION RESULT = $FFF HEX
4.7µF
DESCRIPTION
10Ω
V
DD
CH1
CH2
OSCILLOSCOPE
CH3
REF
/2 to perform conversion
CH4
SCLK
SSTRB
DOUT*