19-3574; Rev 0; 5/05
8-/4-Channel, ±V
REF
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 (0 to +V
REF
/2, -V
REF
/2 to 0, 0 to +V
REF
,
-V
REF
to 0, ±V
REF
/4, ±V
REF
/2, and ±V
REF
), and three
differential input ranges (±V
REF
/2, ±V
REF
, ±2 x V
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.
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.
Features
♦
Software-Programmable Input Range for Each
Channel
♦
Single-Ended Input Ranges
0 to +V
REF
/2, -V
REF
/2 to 0, 0 to +V
REF
, -V
REF
to
0, ±V
REF
/4, ±V
REF
/2, and ±V
REF
♦
Differential Input Ranges
±V
REF
/2, ±V
REF
, and ±2 x V
REF
♦
Eight Single-Ended or Four Differential Analog
Inputs (MAX1034)
♦
Four Single-Ended or Two Differential Analog
Inputs (MAX1035)
♦
±6V Overvoltage Tolerant Inputs
♦
Internal or External Reference
♦
115ksps Maximum Sample Rate
♦
Single +5V Power Supply
♦
20-/24-Pin TSSOP Package
MAX1034/MAX1035
Ordering Information
PART
MAX1034EUG*
MAX1035EUP
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-
CHANNELS
PACKAGE
24 TSSOP
20 TSSOP
8
4
Applications
Industrial Control Systems
Data-Acquisition Systems
Avionics
Robotics
*Future
product—contact factory for availability.
Pin Configurations
TOP VIEW
AV
DD1
1
CH0 2
CH1 3
CH2 4
CH3 5
CH4 6
CH5 7
CH6 8
CH7 9
CS 10
DIN 11
SSTRB 12
24 AGND1
23 AGND2
22 AV
DD2
21 AGND3
MAX1034
20 REF
19 REFCAP
18 DV
DD
17 DV
DDO
16 DGND
15 DGNDO
14 DOUT
13 SCLK
SPI and QSPI are a trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
TSSOP
Pin Configurations continued at end of data sheet.
1
________________________________________________________________
Maxim Integrated Products
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.
8-/4-Channel, ±V
REF
Multirange Inputs,
Serial 14-Bit ADCs
MAX1034/MAX1035
ABSOLUTE MAXIMUM RATINGS
AVDD1 to AGND1 ....................................................-0.3V to +6V
AVDD2 to AGND2 ....................................................-0.3V to +6V
DVDD to DGND ........................................................-0.3V to +6V
DVDDO to DGNDO ..................................................-0.3V to +6V
DVDD to DVDDO ......................................................-0.3V to +6V
DVDD, DVDDO to AVDD1 ........................................-0.3V to +6V
AVDD1, DVDD, DVDDO to AVDD2 ..........................-0.3V to +6V
DGND, DGNDO, AGND3, AGND2 to AGND1 ......-0.3V to +0.3V
CS,
SCLK, DIN, DOUT, SSTRB to
DGNDO ............................................-0.3V to (DVDDO + 0.3V)
CH0–CH7 to AGND1 ...................................................-6V to +6V
REF, REFCAP to AGND1.......................-0.3V to (AVDD1 + 0.3V)
Continuous Current (any pin) ...........................................±50mA
Continuous Power Dissipation (T
A
= +70°C)
20-Pin TSSOP (derate 11mW/°C above +70°C) ..........879mW
24-Pin TSSOP (derate 12.2mW/°C above +70°C) .......976mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature .....................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(AV
DD1
= AV
DD2
= DV
DD
= DV
DDO
= 5V, AGND1 = DGND = DGNDO = AGND2 = AGND3 = 0, f
CLK
= 3.5MHz (50% duty cycle), external
clock mode, V
REF
= 4.096V (external reference operation), REFCAP = AV
DD1
, maximum single-ended bipolar input range (±V
REF
), C
DOUT
= 50pF, C
SSTRB
= 50pF, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
DC ACCURACY (Notes 1, 2)
Resolution
Integral Nonlinearity
Differential Nonlinearity
Transition Noise
INL
DNL
No missing codes
External or internal reference
Single-ended inputs
Offset Error
Differential inputs
(Note 3)
Channel-to-Channel Gain
Matching
Channel-to-Channel Offset Error
Matching
Offset Temperature Coefficient
Gain Error
Gain Temperature Coefficient
Unipolar Endpoint Overlap
Unipolar or bipolar
Unipolar or bipolar
Unipolar
Bipolar
Unipolar
Bipolar
Unipolar
Bipolar
Negative unipolar full scale to positive
unipolar zero-scale
0
1.5
1.0
5
Unipolar
Bipolar
Unipolar
Bipolar
0.5
2
0
-1.0
0
-2
0.025
1.0
10
5
±0.5
±0.3
±10
±10
±20
±20
%FSR
mV
ppm/°C
%FSR
ppm/°C
LSB
mV
14
±0.25
±1
±1
Bits
LSB
LSB
LSB
RMS
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
2
_______________________________________________________________________________________
8-/4-Channel, ±V
REF
Multirange Inputs,
Serial 14-Bit ADCs
ELECTRICAL CHARACTERISTICS (continued)
(AV
DD1
= AV
DD2
= DV
DD
= DV
DDO
= 5V, AGND1 = DGND = DGNDO = AGND2 = AGND3 = 0, f
CLK
= 3.5MHz (50% duty cycle), external
clock mode, V
REF
= 4.096V (external reference operation), REFCAP = AV
DD1
, maximum single-ended bipolar input range (±V
REF
), C
DOUT
= 50pF, C
SSTRB
= 50pF, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
SYMBOL
CONDITIONS
Differential inputs, FSR = 2 x V
REF
Signal-to-Noise Plus Distortion
SINAD
Single-ended inputs, FSR = V
REF
Single-ended inputs, FSR = V
REF
/ 2
Single-ended inputs, FSR = V
REF
/ 4
Differential inputs, FSR = 2 x V
REF
Signal-to-Noise Ratio
SNR
Single-ended inputs, FSR = V
REF
Single-ended inputs, FSR = V
REF
/ 2
Single-ended inputs, FSR = V
REF
/ 4
Total Harmonic Distortion
(Up to the 5th Harmonic)
Spurious-Free Dynamic Range
Aperture Delay
Aperture Jitter
Channel-to-Channel Isolation
CONVERSION RATE
External clock mode, Figure 2
Byte-Wide Throughput Rate
f
SAMPLE
External acquisition mode, Figure 3
Internal clock mode, Figure 4
ANALOG INPUTS (CH0–CH3 MAX1035, CH0–CH7 MAX1034, AGND1)
Small-Signal Bandwidth
Full-Power Bandwidth
All input ranges, V
IN
= 100mV
P-P
(Note 2)
All input ranges, V
IN
= 4V
P-P
(Note 2)
R[2:1] = 001
R[2:1] = 010
R[2:1] = 011
Input Voltage Range (Table 6)
V
CH_
R[2:1] = 100
R[2:1] = 101
R[2:1] = 110
R[2:1] = 111
True-Differential Analog
Common-Mode Voltage Range
Common-Mode Rejection Ratio
Input Current
Input Capacitance
Input Resistance
V
CMDR
CMRR
I
CH_
C
CH_
R
CH_
DIF/SGL = 1
DIF/SGL = 1, input voltage range = ±V
REF
/4
-V
REF
< V
CH_
< +V
REF
-1500
5
6
-V
REF
/4
-V
REF
/2
0
-V
REF
/2
-V
REF
0
-V
REF
-4.75
75
+650
2
700
+V
REF
/4
0
+V
REF
/2
+V
REF
/2
0
+V
REF
+V
REF
+5.50
V
dB
µA
pF
kΩ
V
MHz
kHz
114
84
106
ksps
THD
SFDR
t
AD
t
AJ
Figure 21
Figure 21
92
79
MIN
TYP
84.5
84
82.5
80.5
84.5
84
82.5
80.5
-98
99
15
100
105
dB
dB
ns
ps
dB
dB
dB
MAX
UNITS
DYNAMIC SPECIFICATIONS f
IN(SINE-WAVE)
= 5kHz, V
IN
= FSR - 0.05dB, f
SAMPLE
= 130ksps (Notes 1, 2)
MAX1034/MAX1035
_______________________________________________________________________________________
3
8-/4-Channel, ±V
REF
Multirange Inputs,
Serial 14-Bit ADCs
MAX1034/MAX1035
ELECTRICAL CHARACTERISTICS (continued)
(AV
DD1
= AV
DD2
= DV
DD
= DV
DDO
= 5V, AGND1 = DGND = DGNDO = AGND2 = AGND3 = 0, f
CLK
= 3.5MHz (50% duty cycle), external
clock mode, V
REF
= 4.096V (external reference operation), REFCAP = AV
DD1
, maximum single-ended bipolar input range (±V
REF
), C
DOUT
= 50pF, C
SSTRB
= 50pF, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
Reference Output Voltage
Reference Temperature
Coefficient
Reference Short-Circuit Current
Reference Load Regulation
EXTERNAL REFERENCE (REFCAP = AV
DD
)
Reference Input Voltage Range
REFCAP Buffer Disable
Threshold
V
REF
V
RCTH
(Note 4)
V
REF
= +4.096V, external clock mode,
external acquisition mode, internal clock
mode, or partial power-down mode
V
REF
= +4.096V, full power-down mode
External clock mode, external acquisition
mode, internal clock mode, or partial
power-down mode
Full power-down mode
DIGITAL INPUTS (DIN, SCLK,
CS)
Input High Voltage
Input Low Voltage
Input Hysteresis
Input Leakage Current
Input Capacitance
DIGITAL OUTPUTS (DOUT, SSTRB)
Output Low Voltage
Output High Voltage
DOUT Tri-State Leakage Current
Analog Supply Voltage
Digital Supply Voltage
V
OL
V
OH
I
DDO
AV
DD1
DV
DD
DV
DDO
= 4.75V, I
SINK
= 10mA
DV
DDO
= 2.7V, I
SINK
= 5mA
I
SOURCE
= 0.5mA
CS
= DV
DDO
DV
DDO
- 0.4
-10
4.75
4.75
+10
5.25
5.25
0.4
0.4
V
V
µA
V
V
V
IH
V
IL
V
HYST
I
IN
C
IN
V
IN
= 0 to DV
DDO
-10
10
0.2
+10
0.7 x
DV
DDO
0.3 x
DV
DDO
V
V
V
µA
pF
20
3.800
AV
DD1
- 0.4
90
±0.1
45
40
4.136
AV
DD1
- 0.1
200
±10
V
V
SYMBOL
V
REF
TC
REF
I
REFSC
REF shorted to AGND1
REF shorted to AV
DD
I
REF
= 0 to 0.5mA
CONDITIONS
MIN
4.056
TYP
4.096
±30
10
-1
0.1
10
MAX
4.136
UNITS
V
ppm/°C
mA
mV
INTERNAL REFERENCE (Bypass REFCAP with 0.1µF to AGND1 and REF with 1.0µF to AGND1)
Reference Input Current
I
REF
µA
Reference Input Resistance
R
REF
kΩ
POWER REQUIREMENTS (AV
DD1
and AGND1, AV
DD2
and AGND2, DV
DD
and DGND, DV
DDO
and DGNDO)
4
_______________________________________________________________________________________
8-/4-Channel, ±V
REF
Multirange Inputs,
Serial 14-Bit ADCs
ELECTRICAL CHARACTERISTICS (continued)
(AV
DD1
= AV
DD2
= DV
DD
= DV
DDO
= 5V, AGND1 = DGND = DGNDO = AGND2 = AGND3 = 0, f
CLK
= 3.5MHz (50% duty cycle), external
clock mode, V
REF
= 4.096V (external reference operation), REFCAP = AV
DD1
, maximum single-ended bipolar input range (±V
REF
), C
DOUT
= 50pF, C
SSTRB
= 50pF, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
Preamplifier Supply Voltage
Digital I/O Supply Voltage
SYMBOL
AV
DD2
DV
DDO
External clock mode, Internal reference
external acquisition
mode, or internal
External reference
clock mode
External clock mode, external acquisition
mode, or internal clock mode
External clock mode, external acquisition
mode, or internal clock mode
External clock mode, external acquisition
mode, or internal clock mode
Partial power-down mode
Full power-down mode
PSRR
All analog input ranges
External clock mode
SCLK Period
t
CP
External acquisition mode
Internal clock mode
External clock mode
SCLK High Pulse Width (Note 5)
t
CH
External acquisition mode
Internal clock mode
External clock mode
SCLK Low Pulse Width (Note 5)
DIN to SCLK Setup
DIN to SCLK Hold
SCLK Fall to DOUT Valid
CS
Fall to DOUT Enable
CS
Rise to DOUT Disable
CS
Fall to SCLK Rise Setup
CS
High Minimum Pulse Width
SCLK Fall to
CS
Rise Hold
SSTRB Rise to
CS
Fall Setup
DOUT Rise/Fall Time
SSTRB Rise/Fall Time
C
L
= 50pF
C
L
= 50pF
t
CL
t
DS
t
DH
t
DO
t
DV
t
TR
t
CSS
t
CSPW
t
CSH
40
40
0
40
10
10
External acquisition mode
Internal clock mode
272
228
100
109
92
40
109
92
40
40
0
40
40
40
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
CONDITIONS
MIN
4.75
2.70
3
2.5
0.9
17.5
0.2
1.3
1
±0.125
62
62
83
µs
TYP
MAX
5.25
5.25
3.5
mA
3
2
25
1
mA
mA
mA
mA
µA
LSB
UNITS
V
V
MAX1034/MAX1035
AV
DD1
Supply Current
I
AVDD1
DV
DD
Supply Current
AV
DD2
Supply Current
DV
DDO
Supply Current
Total Supply Current
Power-Supply Rejection Ratio
I
DVDD
I
AVDD2
I
DVDDO
TIMING CHARACTERISTICS (Figures 15 and 16)
_______________________________________________________________________________________
5
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