19-3574; Rev 0; 5/05
8-/4-Channel, ±± Multirange Inputs,
REF
Serial 14-Bit ADCs
General Description
Features
♦ Software-Programmable Input Range for Each
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).
Channel
♦ Single-Ended Input Ranges
0 to +V
/2, -V
/2 to 0, 0 to +V
, -V
to
REF
REF
REF
REF
0, ±V
/4, ±V
/2, and ±V
REF
REF
REF
♦ Differential Input Ranges
±V /2, ±V , and ±2 ꢀ V
REF
REF
REF
♦ Eight Single-Ended or Four Differential Analog
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
Inputs (MAX1034)
♦ Four Single-Ended or Two Differential Analog
Inputs (MAX1035)
♦ ±±V ꢁOerOoltage Tolerant Inputs
♦ Internal or Eꢀternal Reference
♦ 115ksps Maꢀimum Sample Rate
♦ Single +5V Power Supply
input ranges (0 to +V
/2, -V
/2 to 0, 0 to +V
,
REF
V
REF
/2, and
REF
-V
to 0,
V
/4,
V
), and three
REF
REF
REF
REF
differential input ranges ( V
/2, V
, 2 x V ).
REF REF
REF
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.
♦ 20-/24-Pin TSSꢁP Package
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.
Ordering Information
PIN-
PART
TEMP RANGE
CHANNELS
PACKAGE
Applications
MAX1034EUG*
MAX1035EUP
-40°C to +85°C 24 TSSOP
-40°C to +85°C 20 TSSOP
8
4
Industrial Control Systems
Data-Acquisition Systems
Avionics
*Future product—contact factory for availability.
Pin Configurations
Robotics
TOP VIEW
AV
1
2
3
4
5
6
7
8
9
24 AGND1
23 AGND2
DD1
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
22 AV
DD2
21 AGND3
20 REF
MAX1034
19 REFCAP
18 DV
17 DV
DD
DDO
16 DGND
15 DGNDO
14 DOUT
13 SCLK
CS 10
DIN 11
SSTRB 12
SPI and QSPI are a trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
TSSꢁP
Pin Configurations continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.