MAX11646EUA+ Maxim Integrated Products, MAX11646EUA+ Datasheet - Page 10

• Manufacturer Part Number: MAX11646EUA+
• Description: IC ADC 10BIT I2C 94.4KSPS 8UMAX
• Manufacturer: Maxim Integrated Products

Specifications of MAX11646EUA+

• Number Of Bits: 10
• Sampling Rate (per Second): 94.4k
• Data Interface: I²C, Serial
• Number Of Converters: 1
• Power Dissipation (max): 362mW
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
• Number Of Adc Inputs: 2
• Conversion Rate: 1 Ksps to 94.4 Ksps
• Resolution: 10 bit
• Input Type: Single-Ended
• Interface Type: I2C
• Snr: 60 dB
• Voltage Reference: Internal 4.096 V
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 4.5 V
• Maximum Power Dissipation: 362 mW
• Maximum Operating Temperature: + 85 C
• Input Voltage: 4.5 V to 5.5 V
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Low-Power, 1-/2-Channel, I
in Ultra-Tiny 1.9mm x 2.2mm Package
Figure 2. Functional Diagram
Figure 3. Load Circuit
The MAX11646/MAX11647 ADCs use successive-
approximation conversion techniques and fully differen-
tial input T/H circuitry to capture and convert an analog
signal to a serial 10-bit digital output. The
MAX11646/MAX11647 measure either two single-
ended inputs or one differential input. These devices
feature a high-speed, 2-wire serial interface supporting
data rates up to 1.7MHz. Figure 2 shows the simplified
internal structure for the MAX11646/MAX11647.
10
______________________________________________________________________________________
SDA
GND
AIN0
AIN1
SDA
SCL
V
REF
DD
Detailed Description
V
DD
I
I
OL
OH
CONFIGURATION REGISTER
ANALOG
INPUT
MUX
INPUT SHIFT REGISTER
SETUP REGISTER
400pF
V
OUT
T/H
REF
4.096V (MAX11646)
2.048V (MAX11647)
REFERENCE
The MAX11646/MAX11647 operate from a single supply
and consume 670µA (typ) at sampling rates up to
94.4ksps. The MAX11647 features a 2.048V internal ref-
erence and the MAX11646 features a 4.096V internal ref-
erence. These devices can be configured for use with an
external reference from 1V to V
The MAX11646/MAX11647 analog input architecture
contains an analog input multiplexer (mux), a fully dif-
ferential T/H capacitor, T/H switches, a comparator,
and a fully differential switched capacitive digital-to-
analog converter (DAC) (Figure 4).
In single-ended mode, the analog-input multiplexer con-
nects C
(see the Configuration/Setup Bytes (Write Cycle) sec-
tion) and GND (Table 3). In differential mode, the analog
input multiplexer connects C
inputs selected by CS0 (Table 4).
During the acquisition interval, the T/H switches are in
the track position and C
signal. At the end of the acquisition interval, the T/H
switches move to the hold position retaining the charge
on C
CONTROL
2
LOGIC
T/H
10-BIT
ADC
C, 10-Bit ADCs
T/H
as a stable sample of the input signal.
between the analog input selected by CS0
Analog Input and Track/Hold
MAX11646
MAX11647
OSCILLATOR
INTERNAL
OUTPUT SHIFT
T/H
REGISTER
AND RAM
charges to the analog input
T/H
DD
.
to the + and - analog
Power Supply