19-3574; Rev 2; 3/12
8-/4-Channel, ±VREF Multirange Inputs,
Serial 14-Bit ADCs
General Description
The MAX1034/MAX1035 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 MAX1034 provides eight (single-ended) or four (true
differential) analog input channels. The MAX1035 pro-
vides four (single-ended) or two (true differential) analog
input channels. Each analog input channel is indepen-
dently software programmable for seven single-ended
input ranges (0V to +VREF/2, -VREF/2 to 0V, 0V to +VREF,
-VREF to 0V, ±VREF/4, ±VREF/2, and ±VREF), and three
differential input ranges (±VREF/2, ±VREF, ±2 x VREF).
An on-chip +4.096V reference offers a small convenient
ADC solution. The MAX1034/MAX1035 also accept an
external reference voltage between 3.800V and 4.136V.
The MAX1034 is available in a 24-pin TSSOP package
and the MAX1035 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
Features
o Software-Programmable Input Range for Each
Channel
o Single-Ended Input Ranges
0V to +VREF/2, -VREF/2 to 0V, 0V to +VREF,
-VREF to 0V, ±VREF/4, ±VREF/2, and ±VREF
o Differential Input Ranges
±VREF/2, ±VREF, and ±2 x VREF
o Eight Single-Ended or Four Differential Analog
Inputs (MAX1034)
o Four Single-Ended or Two Differential Analog
Inputs (MAX1035)
o ±6V 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
MAX1034EUG+
24 TSSOP
8
MAX1035EUP+
20 TSSOP
4
Note: All devices are specified over the -40°C to +85°C opera-
ting temperature range.
+Denotes a lead(Pb)-free/RoHS-compliant package.
Pin Configurations
QSPI is a trademark of Motorola, Inc.
MICROWIRE is a registered trademark of National
Semiconductor Corp.
TOP VIEW
+
AVDD1 1
CH0 2
CH1 3
CH2 4
CH3 5
MAX1034
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 DVDDO
16 DGND
15 DGNDO
14 DOUT
13 SCLK
TSSOP
Pin Configurations continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
