MAX1032/MAX1033
8- and 4-Channel, ±3 x VREF
Multirange Inputs, Serial 14-Bit ADCs
General Description
The MAX1032/MAX1033 multirange, low-power, 14-bit,
successive-approximation, analog-to-digital converters
(ADCs) operate from a single +5V supply and achieve
throughput rates up to 115ksps. A separate digital sup-
ply allows digital interfacing with 2.7V to 5.25V systems
using the SPI/QSPI™-/MICROWIRE®-compatible serial
interface. Partial power-down mode reduces the supply
current to 1.3mA (typ). Full power-down mode reduces
the power-supply current to 1µA (typ).
The MAX1032 provides eight (single-ended) or four
(true differential) analog input channels. The MAX1033
provides four (single-ended) or two (true differential)
analog input channels. Each analog input channel is
independently software programmable for seven sin-
gle-ended input ranges 0 to (3 x VREF)/2, (-3 x VREF)/2
to 0, 0 to 3 x VREF, -3 x VREF to 0, (±3 x VREF)/4,
(±3 x VREF)/2, ±3 x VREF and three differential input
ranges (±3 x VREF)/2, ±3 x VREF, ±6 x VREF.
An on-chip +4.096V reference offers a small convenient
ADC solution. The MAX1032/MAX1033 also accept an
external reference voltage between 3.800V and 4.136V.
The MAX1032 is available in a 24-pin TSSOP package
and the MAX1033 is available in a 20-pin TSSOP pack-
age. Each device is specified for operation from -40°C
to +85°C.
Applications
Industrial Control Systems
Data-Acquisition Systems
Avionics
Robotics
QSPI is a trademark of Motorola, Inc.
MICROWIRE is a registered trademark of National
Semiconductor Corp.
Features
o Software-Programmable Input Range for Each
Channel
o Single-Ended Input Ranges (VREF = 4.096V)
(0 to (3 x VREF)/2, (-3 x VREF)/2 to 0,
0 to 3 x VREF, -3 x VREF to 0, (±3 x VREF)/4,
(±3 x VREF)/2, ±3 x VREF)
o Differential Input Ranges
(±3 x VREF)/2, ±3 x VREF, ±6 x VREF
o Eight Single-Ended or Four Differential Analog
Inputs (MAX1032)
o Four Single-Ended or Two Differential Analog
Inputs (MAX1033)
o ±16.5V Overvoltage Tolerant Inputs
o Internal or External Reference
o 115ksps Maximum Sample Rate
o Single +5V Power Supply
o 20-/24-Pin TSSOP Package
Ordering Information
PART
PIN-PACKAGE
CHANNELS
MAX1032BEUG+
24 TSSOP
8
MAX1033BEUP+
20 TSSOP
4
Note: All devices are specified over the -40°C to +85°C oper-
ating temperature range.
+Denotes a lead(Pb)-free/RoHS-compliant package.
Pin Configurations
TOP VIEW
+
AVDD1 1
CH0 2
CH1 3
CH2 4
CH3 5
MAX1032
CH4 6
CH5 7
CH6 8
CH7 9
CS 10
DIN 11
SSTRB 12
24 AGND1
23 AGND2
22 AVDD2
21 AGND3
20 REF
19 REFCAP
18 DVDD
17 DVDD0
16 DGND
15 DGNDO
14 DOUT
13 SCLK
TSSOP
Pin Configurations continued at end of data sheet.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-3573; Rev 6; 7/13
