19-4252; Rev 1; 10/08
12-/16-Bit DASs with ADC, DACs, DPIOs, APIOs,
Reference, Voltage Monitors, and Temp Sensor
General Description
The MAX1329/MAX1330 are smart data acquisition sys-
tems (DASs) based on a successive approximation
register (SAR) analog-to-digital converter (ADC). These
devices are highly integrated, offering an ADC, digital-
to-analog converters (DACs), operational amplifiers (op
amps), voltage reference, temperature sensors, and
analog switches in the same device.
The MAX1329/MAX1330 offer a single ADC with a refer-
ence buffer. The ADC is capable of operating in one of
two user-programmable modes. In normal mode, the
ADC provides up to 12 bits of resolution at 312ksps. In
DSP mode, the ADC provides up to 16 bits of resolution
at 1000sps. The ADC accepts one external differential
input or two external single-ended inputs as well as
inputs from other circuitry on-board. An on-chip pro-
grammable gain amplifier (PGA) follows the analog
inputs, reducing external circuitry requirements. The
PGA gain is adjustable from 1V/V to 8V/V.
The MAX1329/MAX1330 operate from a 1.8V to 3.6V dig-
ital power supply. Shutdown and sleep modes are avail-
able for power-saving applications. Under normal
operation, an internal charge pump boosts the supply
voltage for the analog circuitry when the supply is < 2.7V.
The MAX1329/MAX1330 offer four analog programmable
I/Os (APIOs) and four digital programmable I/Os
(DPIOs). The APIOs can be configured as general-pur-
pose logic inputs and outputs, as a wake-up function, or
as a buffer and level shifter for the serial interface to
communicate with slave devices powered by the analog
supply, AV
DD
. The DPIOs can be configured as general-
purpose logic inputs and outputs as well as inputs to
directly control the ADC conversion rate, the analog
switches, the loading of the DACs, wake-up, sleep, and
shutdown modes, and as an interrupt for when the ana-
log-to-digital conversion is complete.
The MAX1329 includes dual 12-bit force-sense DACs
with a programmable reference buffer and one op amp.
The MAX1330 provides one 12-bit force-sense DAC with
a programmable reference buffer and two op amps. For
the MAX1329/MAX1330, a 16-word DAC FIFO can be
used with the DACA for direct digital synthesis (DDS)
of waveforms.
The 4-wire serial interface is compatible with SPI™,
QSPI™, and MICROWIRE™.
Features
♦
1.8V to 3.6V Single Digital Supply Operation
♦
Internal Charge Pump for Analog Circuits (2.7V to
5.5V)
♦
12-Bit SAR ADC
12 Bits, 312ksps, No Missing Codes
16 Bits, 1000sps, DSP Mode
16-Word FIFO and 20-Bit Accumulator
PGA with Gains of 1, 2, 4, and 8
Unipolar and Bipolar Modes
16-Input Differential Multiplexer
♦
Dual 12-Bit Force-Sense DACs
16-Word FIFO (DACA Only)
♦
Independent Voltage References for ADC and DACs
Internal 2.5V Reference
Adjustable Reference Buffers Provide 1.25V,
2.048V, or 2.5V
♦
System Support
ADC Alarm Register
Uncommitted Op Amps
Dual SPDT Analog Switches
Internal/External Temperature Sensor
Internal Oscillator with Clock I/O
Digital Programmable I/O
Analog Programmable I/O
Programmable Interrupts
Accurate Supply Voltage Measurement
Programmable Dual Voltage Monitors
♦
SPI-/QSPI-/MICROWIRE-Compatible, 4-Wire Serial
Interface
♦
Space-Saving, 6mm x 6mm, 40-Pin Thin QFN
Package
MAX1329/MAX1330
Ordering Information
PART
MAX1329
BETL+
MAX1330
BETL+*
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
40 Thin QFN-EP**
40 Thin QFN-EP**
Applications
Battery-Powered and Portable Devices
Electrochemical and Optical Sensors
Medical Instruments
Industrial Control
Data Acquisition Systems
Low-Cost CODECs
SPI/QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
*Future
product—contact factory for availability.
**EP
= Exposed pad.
+Denotes
a lead-free/RoHS-compliant package.
Pin Configurations appear 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.
12-/16-Bit DASs with ADC, DACs, DPIOs, APIOs,
Reference, Voltage Monitors, and Temp Sensor
MAX1329/MAX1330
ABSOLUTE MAXIMUM RATINGS
AV
DD
to AGND .........................................................-0.3V to +6V
DV
DD
to DGND.........................................................-0.3V to +6V
Analog Inputs to AGND....................................-0.3V to the lower
of (AV
DD
+ 0.3V) or +6V
Digital Inputs to DGND.....................................-0.3V to the lower
of (DV
DD
+ 0.3V) or +6V
Analog Outputs to AGND .................................-0.3V to the lower
of (AV
DD
+ 0.3V) or +6V
Digital Outputs to DGND ..................................-0.3V to the lower
of (DV
DD
+ 0.3V) or 6V
AGND to DGND.................................................... -0.3V to +0.3V
Continuous Current into Any Pin.......................................±50mA
Continuous Power Dissipation (T
A
= +70°C)
40-Pin Thin QFN (derate 37mW/°C above +70°C) ....2963mW
Operation Temperature Range............................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature ......................................................+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
(DV
DD
= 1.8V to 3.6V, AV
DD
= 2.7V to 5.5V, V
REFDAC
= V
REFADC
= 2.5V, external reference; 10µF capacitor at REFADC and REFDAC;
0.01µF capacitor at REFADJ; T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
ADC
Resolution
DSP-Mode Resolution
Integral Nonlinearity
Differential Nonlinearity
Offset Error
Offset Drift
Gain = 1
Gain Error (Excluding Reference)
(Note 1)
Gain Temperature Coefficient
Gain = 2, 4
Gain = 8
Excluding reference
Unipolar mode, gain = 1, 2, 4, 8
Voltage Range
Bipolar mode, gain = 1, 2, 4, 8
Absolute Input Voltage Range
Input Leakage Current into
Analog Inputs
Input Capacitance
Acquisition Time
Conversion Time
Conversion Clock Frequency
Normal operation mode,
ADC converting at 234ksps
ADC Supply Current (Note 3)
Fast power-down mode,
ADC converting at 234ksps
t
AD
t
ACQ
t
CONV
(Note 2)
Gain = 1, 2
Gain = 4, 8
Gain = 1, 2
Gain = 4, 8
12 clocks
0.6
1.2
2.4
0.1
325
µA
210
30
ns
5.0
0
-V
REFADC
/
(2 x Gain)
AGND
±0.5
24
48
±0.8
+V
REFADC
/
Gain
+V
REFADC
/
(2 x Gain)
AV
DD
±1
V
INL
DNL
No missing codes
256 oversampling, dither enabled
Normal mode (Note 1)
Normal mode (Note 1)
(Note 1)
±1.5
±0.1
±1.5
±2.5
ppm/°C
% FS
12
16
±1
±1
±4
Bits
Bits
LSB
12
LSB
12
mV
µV/°C
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
V
nA
pF
µs
µs
MHz
Aperture Delay
2
_______________________________________________________________________________________
12-/16-Bit DASs with ADC, DACs, DPIOs, APIOs,
Reference, Voltage Monitors, and Temp Sensor
ELECTRICAL CHARACTERISTICS (continued)
(DV
DD
= 1.8V to 3.6V, AV
DD
= 2.7V to 5.5V, V
REFDAC
= V
REFADC
= 2.5V, external reference; 10µF capacitor at REFADC and REFDAC;
0.01µF capacitor at REFADJ; T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
Aperture Jitter
SYMBOL
t
AJ
Gain = 1, 2; DV
DD
≥
2.7V, AV
DD
≥
5.0V
Sample Rate
Gain = 4, 8; DV
DD
≥
2.7V, AV
DD
≥
5.0V
Gain = 1, 2
Gain = 4, 8
Power-Supply Rejection
Turn-On Time
Signal-to-Noise Plus Distortion
Total Harmonic Distortion
Spurious-Free Dynamic Range
Channel-to-Channel Crosstalk
Full-Power Bandwidth
Resolution
Differential Nonlinearity
Integral Nonlinearity
Offset Error
Offset-Error Temperature
Coefficient
Gain Error
Gain-Error Temperature
Coefficient
Output Voltage Range
Output Slew Rate
Output Settling Time
FB_ Input Bias Current
FB_ Switch Resistance
FB_ Switch Turn-On/-Off Time
FB_ Switch Off Isolation
FB_ Switch Charge Injection
DAC-to-DAC Crosstalk
Short-Circuit Current
DC Output Impedance
Power-Up Time
Power-Supply Rejection
Charge-Pump Output
Feedthrough
PSR
Sink
Source
Code = 0x800
0.5 LSB settling to 0x800
AV
DD
= 2.7V to 5.5V
Code = 0x800, buffer on, R
L
= 5kΩ,
C
L
= 200pF
f = 10kHz
40
100
1
0.5
13
50
0.8
5
±1
100
DNL
INL
Guaranteed monotonic (Note 4)
(Note 4)
Code = 0x000 (tested at 0x032)
Due to amplifier
Code = 0xFFF
Excluding reference drift
No load
C
L
= 200pF
Code = 0x400 to 0xC00 (Note 2)
(Note 2)
AGND
0.5
4
±0.1
10
1
200
±1
±2.5
±7
0
±7
AV
DD
±5
FPBW
-3dB point
12
±1.0
±8
±30
DAC (R
L
= 5kΩ, C
L
= 200pF, tested in unity gain, unless otherwise noted)
Bits
LSB
LSB
mV
µV/°C
% FS
ppm/°C
V
V/µs
µs
nA
Ω
ns
dB
pC
nV-s
mA
Ω
µs
mV/V
µV
RMS
SINAD
THD
SFDR
Up to the 5th harmonic
PSR
AV
DD
= 2.7V to 5.5V, full-scale input
Supply and reference have settled
±0.06
1
71
82
84
100
4
CONDITIONS
MIN
TYP
50
312
263
234
200
±0.5
mV/V
µs
dB
dB
dB
dB
MHz
ksps
MAX
UNITS
ps
MAX1329/MAX1330
ADC DYNAMIC ACCURACY (10kHz sine wave, V
IN
= 2.5V
P-P
, f
SAMPLE
= 234ksps, gain = 1)
_______________________________________________________________________________________
3
12-/16-Bit DASs with ADC, DACs, DPIOs, APIOs,
Reference, Voltage Monitors, and Temp Sensor
MAX1329/MAX1330
ELECTRICAL CHARACTERISTICS (continued)
(DV
DD
= 1.8V to 3.6V, AV
DD
= 2.7V to 5.5V, V
REFDAC
= V
REFADC
= 2.5V, external reference; 10µF capacitor at REFADC and REFDAC;
0.01µF capacitor at REFADJ; T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
Power-Down Output Leakage
Current
Supply Current per DAC
No load (Note 3)
T
A
= +25°C, AREF<1:0> = DREF<1:0> = 01
T
A
= +25°C, AREF<1:0> = DREF<1:0> = 10
T
A
= +25°C, AREF<1:0> = DREF<1:0> = 11
Output-Voltage Temperature
REFADC and REFDAC
Output Short-Circuit Current
REFADC and REFDAC
Line Regulation
Load Regulation
Long-Term Stability
Turn-On Time
Turn-Off Time
Internal reference
Reference Supply Current (Note 3)
EXTERNAL REFERENCE AT REFADJ
AREF<1:0> = DREF<1:0> = 11
External Reference Input Voltage
Range
AREF<1:0> = DREF<1:0> = 10
AREF<1:0> = DREF<1:0> = 01
Input Resistance
AREF<1:0> = 01
REFADC Buffer Gain
AREF<1:0> = 10
AREF<1:0> = 11
DREF<1:0> = 01
REFDAC Buffer Gain
Minimum Capacitive Bypass
DREF<1:0> = 10
DREF<1:0> = 11
REFADJ to AGND
50
1.225V
1.496V to
AV
DD
- 0.1V
2.450V to
AV
DD
- 0.1V
75
1
0.8192
0.5
1
0.8192
0.5
10
nF
V/V
V/V
kΩ
AV
DD
- 0.1V
V
REFADC buffer
REFDAC buffer
I
SOURCE
= 0µA to 500µA, T
A
= +25°C
I
SINK
= 0µA to 80µA, T
A
= +25°C
T
A
= +25°C
At REFADJ
±100
2
100
445
270
270
µA
(Note 2)
Source
Sink
1.225
2.007
2.450
70
1.250
2.048
2.500
±10
40
13
±100
±600
10
10
1.275
2.089
2.550
±75
ppm/°C
mA
µV/V
µV/µA
ppm/
1000hrs
ms
ns
V
INTERNAL REFERENCE (10µF capacitor at REFADC and REFDAC, 0.01µF capacitor at REFADJ)
Output Voltage at REFADC and
REFDAC
SYMBOL
CONDITIONS
MIN
TYP
MAX
±100
UNITS
nA
µA
4
_______________________________________________________________________________________
12-/16-Bit DASs with ADC, DACs, DPIOs, APIOs,
Reference, Voltage Monitors, and Temp Sensor
ELECTRICAL CHARACTERISTICS (continued)
(DV
DD
= 1.8V to 3.6V, AV
DD
= 2.7V to 5.5V, V
REFDAC
= V
REFADC
= 2.5V, external reference; 10µF capacitor at REFADC and REFDAC;
0.01µF capacitor at REFADJ; T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
External Reference Input Voltage
Range
REFADC Input Resistance
REFADC Input Current
Turn-On Time
Shutdown REFADC Input Current
Minimum Capacitive Bypass
EXTERNAL REFERENCE AT REFDAC
REFDAC Input Voltage Range
REFDAC Input Resistance
REFDAC Input Current
Turn-On Time
Shutdown REFDAC Input Current
Minimum Capacitive Bypass
MULTIPLEXER
Absolute Input Voltage Range
Absolute Input Leakage Current
Input Capacitance
On Resistance
INTERNAL TEMPERATURE SENSOR
Internal Sensor Measurement
Error (Note 5)
External Sensor Measurement
Error (Note 5)
T
A
= +25°C
T
A
= -40°C to +85°C
T
A
= +25°C
T
A
= 0°C to +70°C
T
A
= -40°C to +85°C
±0.4
±2
±3
°C
±0.25
±3
°C
(AGND + 100mV) < V
AIN_
< (AV
DD
- 100mV)
(Note 2)
ADC gain = 1, 2
ADC gain = 4, 8
AGND
±0.01
24
48
340
AV
DD
±1
V
nA
pF
Ω
REFDAC to AGND
10
MAX1329
MAX1330
MAX1329, V
REFDAC
= 2.5V
MAX1330, V
REFDAC
= 2.5V
REFDAC buffer
AGND
64
128
90
180
28
14
75
0.1
1
AV
DD
180
360
86
43
V
kΩ
µA
µs
µA
µF
REFADC to AGND
10
V
REFADC
= 2.5V, 300ksps
REFADC buffer, C
REFADC
= 1µF
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX1329/MAX1330
EXTERNAL REFERENCE AT REFADC
AGND
50
75
30
75
0.01
1.0
40
AV
DD
V
kΩ
µA
µs
µA
µF
_______________________________________________________________________________________
5
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