MAX1282EVKIT Maxim Integrated Products, MAX1282EVKIT Datasheet - Page 14

• Manufacturer Part Number: MAX1282EVKIT
• Description: EVAL KIT FOR MAX1282
• Manufacturer: Maxim Integrated Products

Specifications of MAX1282EVKIT

• Number Of Adc's: 1
• Number Of Bits: 12
• Sampling Rate (per Second): 400k
• Data Interface: Serial
• Inputs Per Adc: 4 Single Ended
• Input Range: ±VREF/2
• Power (typ) @ Conditions: 13.75mW @ 400kSPS
• Voltage Supply Source: Single Supply
• Operating Temperature: 0°C ~ 70°C
• Utilized Ic / Part: MAX1282
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Once conversion is completed, the device goes into the
programmed power mode until a new control byte is
written.
The power-up delay is dependent on the power-down
state. Software low-power modes will be able to start
conversion immediately when running at decreased
clock rates (see Power-Down Sequencing). Upon
power-on reset, when exiting software full power-down
mode, or when exiting hardware shutdown, the device
goes immediately into full-power mode and is ready to
300ksps/400ksps, Single-Supply, 4-Channel,
Serial 12-Bit ADCs with Internal Reference
Table 3. Control-Byte Format
Table 4. Software-Controlled Power Modes
*Circuit operation between conversions; during conversion all circuits are fully powered up.
14
BIT 7
(MSB)
START
BIT
7(MSB)
6
5
4
3
2
1
0(LSB)
PD1/PD0
______________________________________________________________________________________
00
01
10
11
NAME
START
SEL2
SEL1
SEL0
UNI/BIP
SGL/DIF
PD1
PD0
BIT 6
SEL2
Full Power-Down
(FULLPD)
Fast Power-Down
(FASTPD)
Reduced-Power
Mode (REDP)
Normal Operating
MODE
DESCRIPTION
The first logic 1 bit after CS goes low defines the beginning of the control byte.
These three bits select which of the eight channels are used for the conversion (Tables 1 and 2).
1 = unipolar, 0 = bipolar. Selects unipolar or bipolar conversion mode. In unipolar mode, an
analog input signal from 0 to V
range from -V
1 = single ended, 0 = pseudo-differential. Selects single-ended or pseudo-differential conver-
sions. In single-ended mode, input signal voltages are referred to COM. In pseudo-differential
mode, the voltage difference between two channels is measured (Tables 1 and 2).
Select operating mode.
PD1
0
0
1
1
BIT 5
SEL1
CONVERTING
TOTAL SUPPLY CURRENT
PD0
0
1
0
1
(mA)
2.5
2.5
2.5
2.5
REF
/2 to +V
BIT 4
SEL0
Mode
Full power-down
Fast power-down
Reduced power
Normal operation
REF
CONVERSION
/2.
REF
AFTER
0.9mA
1.3mA
2.0mA
2µA
convert after 2µs when using an external reference.
When using the internal reference, wait for the typical
power-up delay from a full power-down (software or
hardware) as shown in Figure 8.
Software power-down is activated using bits PD1 and
PD0 of the control byte. When software power-down is
asserted, the ADC completes the conversion in
can be converted; in bipolar mode, the differential signal can
BIT 3
UNI/BIP
INPUT COMPARATOR
Reduced Power
Reduced Power
Full Power
BIT 2
SGL/DIF
Off
CIRCUIT SECTIONS*
Software Power-Down
BIT 1
PD1
REFERENCE
Off
On
On
On
BIT 0
(LSB)
PD0