19-3767; Rev 1; 10/05
4.5Msps/4Msps, 5V/3V, 2-Channel,
True-Differential, 10-Bit ADCs
General Description
The MAX1334/MAX1335 2-channel, serial-output,
10-bit, analog-to-digital converters (ADCs) feature two
true-differential analog inputs and offer outstanding noise
immunity and dynamic performance. Both devices easily
interface with SPI™/QSPI™/MICROWIRE™ and standard
digital signal processors (DSPs).
The MAX1334 operates from a single +4.75V to +5.25V
supply with sampling rates up to 4.5Msps. The
MAX1335 operates from a single +2.7V to +3.6V supply
with sampling rates up to 4Msps. These devices feature
a partial power-down mode and a full power-down
mode that reduce the supply current to 3.3mA and
0.2µA, respectively. Also featured is a separate power-
supply input (DV
DD
) that allows direct interfacing to
+2.7V to +3.6V digital logic. The fast conversion speed,
low power dissipation, excellent AC performance, and
DC accuracy (±0.4 LSB INL) make the MAX1334/
MAX1335 ideal for industrial process control, motor
control, and base-station applications.
The MAX1334/MAX1335 are available in a space-sav-
ing (3mm x 3mm), 16-pin, TQFN package and operate
over the extended (-40°C to +85°C) temperature range.
Features
♦
4.5Msps Sampling Rate (+5V, MAX1334)
♦
4Msps Sampling Rate (+3V, MAX1335)
♦
Separate Logic Supply: +2.7V to +3.6V
♦
Two True-Differential Analog Input Channels
♦
Bipolar/Unipolar Selection Input
♦
Only 40mW (typ) Power Consumption
♦
Only 2µA (max) Shutdown Current
♦
High-Speed, SPI-Compatible, 3-Wire Serial
Interface
♦
2.6MHz Full-Linear Bandwidth
♦
61dB SINAD at 525kHz Input Frequency
♦
No Pipeline Delays
♦
Space-Saving (3mm x 3mm), 16-Pin TQFN
Package
MAX1334/MAX1335
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
16 TQFN-EP*
(3mm x 3mm)
16 TQFN-EP*
(3mm x 3mm)
PKG
CODE
T1633F-3
T1633F-3
Applications
Data Acquisition
Bill Validation
Motor Control
Base Stations
High-Speed Modems
Optical Sensors
Industrial Process Control
MAX1334ETE**
-40°C to +85°C
MAX1335ETE
-40°C to +85°C
*EP
= Exposed paddle.
**Future
product—contact factory for availability.
Selector Guide appears at end of data sheet.
Pin Configuration appears at end of data sheet.
Typical Operating Circuit
+2.7V TO +3.6V
+4.75V TO +5.25V
1µF
0.01µF
AV
DD
+
DIFFERENTIAL
INPUT VOLTAGE
-
+
-
REF INPUT
VOLTAGE
0.01µF
AGND
AIN1P
AIN1N
AIN0P
AIN0N
REF
1µF
MAX1334
CHSEL
CNVST
SCLK
DOUT
AGND DGND
µC/DSP
DV
DD
SHDN
BIP/UNI
0.01µF
1µF
SPI/QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
________________________________________________________________
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.
4.5Msps/4Msps, 5V/3V, 2-Channel,
True-Differential, 10-Bit ADCs
MAX1334/MAX1335
ABSOLUTE MAXIMUM RATINGS
AV
DD
to AGND (MAX1334) ......................................-0.3V to +6V
AV
DD
to AGND (MAX1335) ......................................-0.3V to +4V
DV
DD
to DGND.........................................................-0.3V to +4V
AGND to DGND.....................................................-0.3V to +0.3V
SCLK, CNVST,
SHDN,
CHSEL, BIP/UNI,
DOUT to DGND ...................................-0.3V to (DV
DD
+ 0.3V)
AIN0P, AIN0N, AIN1P, AIN1N, REF to
AGND...................................................-0.3V to (AV
DD
+ 0.3V)
Maximum Current into Any Pin .........................................±50mA
Continuous Power Dissipation (T
A
= +70°C)
16-Pin TQFN (derate 17.5mW/°C above +70°C) ....1398.6mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-60°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 (MAX1334)
(AV
DD
= +4.75V to +5.25V, DV
DD
= +2.7V to +3.6V, f
SCLK
= 76MHz, V
REF
= 4.096V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.
Typical values are at T
A
= +25°C.)
PARAMETER
Resolution
Integral Nonlinearity
Differential Nonlinearity
Offset Error
Gain Error
Offset-Error Temperature
Coefficient
Gain-Error Temperature
Coefficient
Signal-to-Noise Ratio
Signal-to-Noise Plus Distortion
Total Harmonic Distortion
Spurious-Free Dynamic Range
Intermodulation Distortion
Channel-to-Channel Isolation
Full-Linear Bandwidth
Full-Power Bandwidth
Small-Signal Bandwidth
CONVERSION RATE
Minimum Conversion Time
Maximum Throughput Rate
Minimum Track-and-Hold
Acquisition Time
t
ACQ
Figure 5
t
CONV
Figure 5
4.5
32
171
ns
Msps
ns
SINAD > 56dB
SNR
SINAD
THD
SFDR
IMD
f
IN1
= 103.5kHz, A
IN1
=
TBDdBFS
f
IN2
= 113.5kHz, A
IN2
=
TBDdBFS
68
66
59.5
SYMBOL
N
INL
DNL
CONDITIONS
MIN
10
±0.4
±0.4
±1.0
±1.5
±1.1
±4.5
±1.0
±1.0
±1.5
±4.0
TYP
MAX
UNITS
Bits
LSB
LSB
LSB
LSB
ppm/°C
ppm/°C
DC ACCURACY (Note 1) (BIP/UNI
=
DGND)
DYNAMIC SPECIFICATIONS (A
IN
= -0.2dBFS, f
IN
= 525kHz, BIP/UNI = DV
DD
, unless otherwise noted) (Note 1)
61
61
-77
78
-72
76
2.6
5.4
5
-68
dB
dB
dBc
dBc
dB
dB
MHz
MHz
MHz
2
_______________________________________________________________________________________
4.5Msps/4Msps, 5V/3V, 2-Channel,
True-Differential, 10-Bit ADCs
ELECTRICAL CHARACTERISTICS (MAX1334) (continued)
(AV
DD
= +4.75V to +5.25V, DV
DD
= +2.7V to +3.6V, f
SCLK
= 76MHz, V
REF
= 4.096V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.
Typical values are at T
A
= +25°C.)
PARAMETER
Aperture Delay
Aperture Jitter
Differential Input Voltage Range
(V
AIN_P
- V
AIN_N
)
Absolute Input Voltage Range
DC Leakage Current
Input Capacitance
REFERENCE INPUT (REF)
REF Input Voltage Range
REF Input Capacitance
REF DC Leakage Current
I
LKG
C
IN
14
AV
DD
+
50mV
14
±10
0.3 x
DV
DD
0.7 x
DV
DD
100
I
ILKG
C
IN
V
OL
V
OH
I
LKGT
C
OUT
AV
DD
DV
DD
Normal mode; average unloaded current
(f
SAMPLE
= 4.0MHz, f
SCLK
= 64MHz)
Partial power-down mode
Full power-down mode
I
SINK
= 5mA
I
SOURCE
= 1mA
Between conversions, CNVST = DV
DD
Between conversions, CNVST = DV
DD
4.75
2.7
11
3.3
0.1
15
5.25
3.6
12
4
2
µA
DV
DD
-
0.5
±1
±0.2
15
0.4
±5
SYMBOL
t
AD
t
AJ
Figure 21
Figure 21
BIP/UNI = DGND
BIP/UNI = DV
DD
0
-V
REF
/ 2
AGND
- 50mV
CONDITIONS
MIN
TYP
< 10
< 10
V
REF
+V
REF
/ 2
AV
DD
+
50mV
±10
MAX
UNITS
ns
ps
MAX1334/MAX1335
DIFFERENTIAL ANALOG INPUTS (AIN0P, AIN0N, AIN1P, AIN1N)
V
IN
V
V
µA
pF
V
REF
C
REF
I
REF
1.0
V
pF
µA
DIGITAL INPUTS (SCLK, CNVST,
SHDN,
CHSEL, BIP/UNI)
Input-Voltage Low
Input-Voltage High
Input Hysteresis
Input Leakage Current
Input Capacitance
DIGITAL OUTPUT (DOUT)
Output-Voltage Low
Output-Voltage High
Tri-State Leakage Current
Tri-State Output Capacitance
POWER REQUIREMENTS
Analog Supply Voltage
Digital Supply Voltage
V
V
mA
V
V
µA
pF
V
IL
V
IH
V
V
mV
µA
pF
Analog Supply Current
I
AVDD
_______________________________________________________________________________________
3
4.5Msps/4Msps, 5V/3V, 2-Channel,
True-Differential, 10-Bit ADCs
MAX1334/MAX1335
ELECTRICAL CHARACTERISTICS (MAX1334) (continued)
(AV
DD
= +4.75V to +5.25V, DV
DD
= +2.7V to +3.6V, f
SCLK
= 76MHz, V
REF
= 4.096V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.
Typical values are at T
A
= +25°C.)
PARAMETER
SYMBOL
CONDITIONS
Average unloaded current (f
SAMPLE
=
4.5MHz, f
SCLK
= 76MHz, zero-scale input)
Digital Supply Current
I
DVDD
Power-down (f
SCLK
= 76MHz)
Static or power-down, all digital inputs are
connected to DV
DD
or DGND
Power-Supply Rejection
PSR
AV
DD
= 4.75V to 5.25V, full-scale input
MIN
TYP
5
18
0.2
±0.5
MAX
8
45
2
±0.3
µA
mV
UNITS
mA
TIMING CHARACTERISTICS (MAX1334) (Figure 4)
(AV
DD
= +4.75V to +5.25V, DV
DD
= +2.7V to +3.6V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
SCLK Clock Period
SCLK Pulse Width
CNVST Rise to DOUT Disable
CNVST Fall to DOUT Enable
CHSEL to CNVST Fall Setup
BIP/UNI to CNVST Fall Setup
CNVST Fall to CHSEL Hold
CNVST Fall to BIP/UNI Hold
DOUT Remains Valid After SCLK
SCLK Rise to DOUT Transition
CNVST to SCLK Rise
SCLK Rise to CNVST
CNVST Pulse Width
Minimum Recovery Time (Full
Power-Down)
Minimum Recovery Time (Partial
Power-Down)
SYMBOL
t
CP
t
SPW
t
CRDD
t
CFDE
t
CHCF
t
BUCF
t
CFCH
t
CFBU
t
DHOLD
t
DOT
t
SETUP
t
HOLD
t
CSW
t
FPD
t
PPD
From CNVST fall or
SHDN
rise
From CNVST fall
C
LOAD
= 0pF (Note 2)
C
LOAD
= 30pF
6
0
6
4
500
CONDITIONS
MIN
13.1
6
15
15
32
32
0
0
1
2
6
TYP
MAX
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
µs
ns
Note 1:
Tested with AV
DD
= 4.75V and DV
DD
= +2.7V.
Note 2:
Guaranteed by design, not production tested.
4
_______________________________________________________________________________________
4.5Msps/4Msps, 5V/3V, 2-Channel,
True-Differential, 10-Bit ADCs
ELECTRICAL CHARACTERISTICS (MAX1335)
(AV
DD
= +2.7V to +3.6V, DV
DD
= +2.7V to +3.6V, f
SCLK
= 64MHz, V
REF
= 2.5V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical
values are at T
A
= +25°C.)
PARAMETER
Resolution
Relative Accuracy
Differential Nonlinearity
Offset Error
Gain Error
Offset-Error Temperature
Coefficient
Gain-Error Temperature
Coefficient
Signal-to-Noise Ratio
Signal-to-Noise Plus Distortion
Total Harmonic Distortion
Spurious-Free Dynamic Range
Channel-to-Channel Isolation
Full-Linear Bandwidth
Full-Power Bandwidth
Small-Signal Bandwidth
CONVERSION RATE
Minimum Conversion Time
Maximum Throughput Rate
Minimum Track-and-Hold
Acquisition Time
Aperture Delay
Aperture Jitter
Differential Input Voltage Range
(V
AIN_P
- V
AIN_N
)
Absolute Input Voltage Range
DC Leakage Current
I
LKG
t
ACQ
t
AD
t
AJ
Figure 5
Figure 21
Figure 21
BIP/UNI = DGND
BIP/
UNI
= DV
DD
0
-V
REF
/ 2
AGND
- 50mV
< 10
< 10
V
REF
+V
REF
/ 2
AV
DD
+
50mV
±1
t
CONV
Figure 5
4
39
203
ns
Msps
ns
ns
ps
SINAD > 56dB
SNR
SINAD
THD
SFDR
68
60
59.5
SYMBOL
N
INL
DNL
CONDITIONS
MIN
10
±0.4
±0.4
±1.0
±1.5
±1.1
±4.5
±1.0
±1.0
±1.5
±4.0
TYP
MAX
UNITS
Bits
LSB
LSB
LSB
LSB
ppm/°C
ppm/°C
DC ACCURACY (Note 3) (BIP/UNI
=
DGND)
MAX1334/MAX1335
DYNAMIC SPECIFICATIONS (A
IN
= -0.2dBFS, f
IN
= 525kHz, BIP/UNI = DV
DD
, unless otherwise noted) (Note 3)
61
61
-77
78
76
2.6
5.4
5
-68
dB
dB
dBc
dBc
dB
MHz
MHz
MHz
DIFFERENTIAL ANALOG INPUTS (AIN0P, AIN0N, AIN1P, AIN1N)
V
IN
V
V
µA
_______________________________________________________________________________________
5
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