19-5098; Rev 0; 1/10
Ultra-Low-Power, 10Msps, Dual 8-Bit ADC
General Description
The MAX19192 is an ultra-low-power, dual, 8-bit, 10Msps
analog-to-digital converter (ADC). The device features
two fully differential wideband track-and-hold (T/H)
inputs. These inputs have a 440MHz bandwidth and
accept fully differential or single-ended signals. The
MAX19192 delivers a typical signal-to-noise and distor-
tion (SINAD) of 48.6dB at an input frequency of
1.875MHz and a sampling rate of 10Msps while consum-
ing only 15.3mW. This ADC operates from a 2.7V to 3.6V
analog power supply. A separate 1.8V to 3.6V supply
powers the digital output driver. In addition to ultra-low
operating power, the MAX19192 features three power-
down modes to conserve power during idle periods.
Excellent dynamic performance, ultra-low power, and
small size make the MAX19192 ideal for applications in
imaging, instrumentation, and digital communications.
An internal 1.024V precision bandgap reference sets
the full-scale range of the ADC to ±0.512V. A flexible
reference structure allows the MAX19192 to use its
internal reference or accept an externally applied refer-
ence for applications requiring increased accuracy.
The MAX19192 features parallel, multiplexed, CMOS-
compatible three-state outputs. The digital output for-
mat is offset binary. A separate digital power input
accepts a voltage from 1.8V to 3.6V for flexible interfac-
ing to different logic levels. The MAX19192 is available
in a 5mm
×
5mm, 28-pin thin QFN package, and is
specified for the extended industrial (-40°C to +85°C)
temperature range.
For higher sampling frequency applications, refer to the
MAX1195–MAX1198 dual 8-bit ADCs. Pin-compatible
versions of the MAX19192 are also available. Refer to
the MAX1191 data sheet for 7.5Msps, the MAX1192
data sheet for 22Msps, and the MAX1193 data sheet
for 45Msps.
Features
o
Ultra-Low Power
15.3mW (Normal Operation: 10Msps)
2µW (Shutdown Mode)
o
Excellent Dynamic Performance
48.6dB SNR at f
IN
= 1.875MHz
70dBc SFDR at f
IN
= 1.875MHz
o
2.7V to 3.6V Single Analog Supply
o
1.8V to 3.6V TTL/CMOS-Compatible Digital
Outputs
o
Fully Differential or Single-Ended Analog Inputs
o
Internal/External Reference Option
o
Multiplexed CMOS-Compatible Three-State Outputs
o
28-Pin Thin QFN Package
o
Evaluation Kit Available (Order MAX19192EVKIT+)
MAX19192
Ordering Information
PART
MAX19192ETI+
MAX19192ETI/V+**
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
28 Thin QFN-EP*
28 Thin QFN-EP*
+Denotes
a lead(Pb)-free/RoHS-compliant package.
*EP
= Exposed pad.
/V denotes an automotive qualified part.
**Future
product—contact factory for availability.
Pin Configuration
TOP VIEW
REFIN
REFN
REFP
COM
PD0
PD1
V
DD
28
27
26
25
24
23
22
INA-
INA+
GND
CLK
GND
INB+
INB-
1
2
3
4
5
6
7
Applications
Ultrasound and Medical Imaging
IQ Baseband Sampling
Battery-Powered Portable Instruments
Low-Power Video
WLAN, Mobile DSL, WLL Receiver
Digital Audio Receiver Front-End
+
21
20
19
D0
D1
D2
D3
A/B
D4
D5
MAX19192
18
17
16
EXPOSED PAD
15
11
12
13
D7
10
GND
OGND
V
DD
V
DD
5mm x 5mm THIN QFN
________________________________________________________________
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.
OV
DD
D6
14
8
9
Ultra-Low-Power, 10Msps, Dual 8-Bit ADC
MAX19192
ABSOLUTE MAXIMUM RATINGS
V
DD
, OV
DD
to GND ...............................................-0.3V to +3.9V
OGND to GND.......................................................-0.3V to +0.3V
INA+, INA-, INB+,
INB- to GND.............-0.3V to the lesser of (V
DD
+ 0.3V or + 3.9V)
CLK, REFIN, REFP, REFN, COM to GND ....-0.3V to the lesser of
(V
DD
+ 0.3V or + 3.9V)
PD0, PD1 to OGND ...........-0.3V to the lesser of (OV
DD
+ 0.3V or + 3.9V)
Digital Outputs to OGND.............................-0.3V to the lesser of
(OV
DD
+ 0.3V or + 3.9V)
Continuous Power Dissipation (T
A
= +70°C)
28-Pin Thin QFN (derated 20.8mW/°C above +70°C) ...1667mW
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
(V
DD
= 3.0V, OV
DD
= 1.8V, V
REFIN
= V
DD
(internal reference), C
L
≈
10pF at digital outputs, f
CLK
= 10MHz, C
REFP
= C
REFN
= C
COM
=
0.33µF, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
DC ACCURACY
Resolution
Integral Nonlinearity
Differential Nonlinearity
Offset Error
Gain Error
DC Gain Matching
Gain Temperature Coefficient
Power-Supply Rejection
ANALOG INPUT
Differential Input Voltage Range
Common-Mode Input Voltage
Range
Input Resistance
Input Capacitance
CONVERSION RATE
Maximum Clock Frequency
Data Latency
f
CLK
Channel A
Channel B
f
IN
= 1.875MHz
f
IN
= 3.0MHz
f
IN
= 1.875MHz
f
IN
= 3.0MHz
47
47
10
5.0
5.5
48.6
48.6
48.6
48.5
MHz
Clock
cycles
V
DIFF
V
COM
R
IN
C
IN
Switched capacitor load
Differential or single-ended inputs
±0.512
V
DD
/2
540
5
V
V
kΩ
pF
Offset (V
DD
±5%)
Gain (V
DD
±5%)
INL
DNL
No missing codes over temperature
≥
+25°C
< +25°C
Excludes REFP - REFN error
±0.01
±30
±0.2
±0.05
8
±0.14
±0.12
±1.00
±1.00
±4
±6
±2
±0.2
Bits
LSB
LSB
%FS
%FS
dB
ppm/°C
LSB
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DYNAMIC CHARACTERISTICS (Differential Inputs, 4096-Point FFT)
Signal-to-Noise Ratio
(Note 2)
Signal-to-Noise and Distortion
(Note 2)
SNR
SINAD
dB
dB
2
_______________________________________________________________________________________
Ultra-Low-Power, 10Msps, Dual 8-Bit ADC
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= 3.0V, OV
DD
= 1.8V, V
REFIN
= V
DD
(internal reference), C
L
≈
10pF at digital outputs, f
CLK
= 10MHz, C
REFP
= C
REFN
= C
COM
=
0.33µF, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
Spurious-Free Dynamic Range
(Note 2)
Third-Harmonic Distortion
(Note 2)
Intermodulation Distortion
Third-Order Intermodulation
Total Harmonic Distortion
(Note 2)
Small-Signal Bandwidth
Full-Power Bandwidth
Aperture Delay
Aperture Jitter
Overdrive Recovery Time
REFP Output Voltage
REFN Output Voltage
COM Output Voltage
Differential Reference Output
Differential Reference Output
Temperature Coefficient
Maximum REFP/REFN/COM
Source Current
Maximum REFP/REFN/COM Sink
Current
V
COM
V
REF
V
REFTC
I
SOURCE
I
SINK
V
REFP
- V
REFN
SYMBOL
SFDR
HD3
IMD
IM3
THD
SSBW
FPBW
t
AD
t
AJ
1.5
×
full-scale input
V
REFP
- V
COM
V
REFN
- V
COM
V
DD
/2
- 0.15
f
IN
= 3.0MHz
f
IN
= 1.875MHz
f
IN
= 3.0MHz
f
IN1
= 1.8MHz at -7dBFS,
f
IN2
= 3.0MHz at -7dBFS
f
IN1
= 1.8MHz at -7dBFS,
f
IN2
= 3.0MHz at -7dBFS
f
IN
= 1.875MHz
f
IN
= 3.0MHz
Input at -20dBFS
Input at -0.5dBFS
CONDITIONS
f
IN
= 1.875MHz
MIN
59
TYP
70
70
-71
-71
-64
-64
-69
-67.0
440
440
1.5
2
2
0.256
-0.256
V
DD
/2
0.512
±30
2
2
V
DD
/2
+ 0.15
-57.0
MAX
UNITS
dBc
dBc
dBc
dBc
dBc
MHz
MHz
ns
ps
RMS
ns
V
V
V
V
ppm/°C
mA
mA
MAX19192
INTERNAL REFERENCE (REFIN = V
DD
; V
REFP
, V
REFN
, and V
COM
are Generated Internally)
BUFFERED EXTERNAL REFERENCE (V
REFIN
= 1.024V, V
REFP
, V
REFN
, and V
COM
are Generated Internally)
REFIN Input Voltage
COM Output Voltage
Differential Reference Output
Maximum REFP/REFN/COM
Source Current
Maximum REFP/REFN/COM Sink
Current
V
REFIN
V
COM
V
REF
I
SOURCE
I
SINK
V
REFP
- V
REFN
V
DD
/2
- 0.15
1.024
V
DD
/2
0.512
2
2
V
DD
/2
+ 0.15
V
V
V
mA
mA
_______________________________________________________________________________________
3
Ultra-Low-Power, 10Msps, Dual 8-Bit ADC
MAX19192
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= 3.0V, OV
DD
= 1.8V, V
REFIN
= V
DD
(internal reference), C
L
≈
10pF at digital outputs, f
CLK
= 10MHz, C
REFP
= C
REFN
= C
COM
=
0.33µF, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
REFIN Input Resistance
REFIN Input Current
REFP Input Voltage
REFN Input Voltage
COM Input Voltage
Differential Reference Input
Voltage
REFP Input Resistance
REFN Input Resistance
DIGITAL INPUTS (CLK, PD0, PD1)
Input High Threshold
Input Low Threshold
Input Hysteresis
Digital Input Leakage Current
Digital Input Capacitance
Output-Voltage Low
Output-Voltage High
Three-State Leakage Current
Three-State Output Capacitance
POWER REQUIREMENTS
Analog Supply Voltage
Digital Output Supply Voltage
V
DD
OV
DD
Normal operating mode, f
IN
= 1.875MHz
at -0.5dBFS, CLK input from GND to V
DD
Idle mode (three-state), f
IN
= 1.875MHz
at -0.5dBFS, CLK input from GND to V
DD
Standby mode, CLK input from GND to
V
DD
, PD0 = OGND, PD1 = OV
DD
Shutdown mode, CLK = GND or V
DD
,
PD0 = PD1 = OGND
2.7
1.8
5.1
5.1
2.9
0.6
5.0
µA
3.0
3.6
V
DD
5.8
mA
V
V
V
IH
V
IL
V
HYST
DI
IN
DC
IN
V
OL
V
OH
I
LEAK
C
OUT
5
I
SINK
= 200µA
I
SOURCE
= 200µA
0.8 x OV
DD
±5
CLK at GND or V
DD
PD0 and PD1 at OGND or OV
DD
5
0.2 x OV
DD
CLK
PD0, PD1
CLK
PD0, PD1
0.1
±5
±5
0.7 x V
DD
0.7 x OV
DD
0.3 x V
DD
0.3 x OV
DD
V
V
V
µA
pF
V
V
µA
pF
V
COM
V
REF
R
REFP
R
REFN
V
REFP
- V
REFN
Measured between REFP and COM
Measured between REFN and COM
V
REFP
- V
COM
V
REFN
- V
COM
SYMBOL
CONDITIONS
MIN
TYP
> 500
-0.7
0.256
-0.256
V
DD
/2
0.512
4
4
MAX
UNITS
kΩ
µA
V
V
V
V
kΩ
kΩ
UNBUFFERED EXTERNAL REFERENCE (REFIN = GND, V
REFP
, V
REFN
, and V
COM
are Applied Externally)
DIGITAL OUTPUTS (D7–D0, A/B)
Analog Supply Current
I
DD
4
_______________________________________________________________________________________
Ultra-Low-Power, 10Msps, Dual 8-Bit ADC
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= 3.0V, OV
DD
= 1.8V, V
REFIN
= V
DD
(internal reference), C
L
≈
10pF at digital outputs, f
CLK
= 10MHz, C
REFP
= C
REFN
= C
COM
=
0.33µF, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
Normal operating mode,
f
IN
= 1.875MHz at -0.5dBFS, C
L
≈
10pF
Digital Output Supply Current
(Note 3)
Idle mode (three-state), DC input, CLK =
GND or V
DD,
PD0 = OV
DD
, PD1 = OGND
Standby mode, DC input, CLK = GND or
V
DD,
PD0 = OGND, PD1 = OV
DD
Shutdown mode, CLK = GND or V
DD
,
PD0 = PD1 = OGND
TIMING CHARACTERISTICS
CLK Rise to CHA Output Data
Valid
CLK Fall to CHB Output Data
Valid
CLK Rise/Fall to A/B Rise/Fall
Time
PD1 Rise to Output Enable
PD1 Fall to Output Disable
CLK Duty Cycle
CLK Duty-Cycle Variation
Wake-Up Time from Shutdown
Mode
Wake-Up Time from Standby
Mode
Digital Output Rise/Fall Time
INTERCHANNEL CHARACTERISTICS
Crosstalk Rejection
Amplitude Matching
Phase Matching
f
IN,X
= 1.875MHz at -0.5dBFS,
f
IN,Y
= 3.0MHz at -0.5dBFS
f
IN
= 1.875MHz at -0.5dBFS (Note 6)
f
IN
= 1.875MHz at -0.5dBFS (Note 6)
-75
±0.03
±0.03
dB
dB
Degrees
t
WAKE, SD
(Note 5)
t
WAKE, ST
(Note 5)
20% to 80%
t
DOA
t
DOB
t
DA/B
t
EN
t
DIS
50% of CLK to 50% of data, Figure 5
(Note 4)
50% of CLK to 50% of data, Figure 5
(Note 4)
50% of CLK to 50% of A/B, Figure 5
(Note 4)
PD0 = OV
DD
PD0 = OV
DD
1
1
1
6
6
6
5
5
50
±10
20
5.5
2
8.5
8.5
8.5
ns
ns
ns
ns
ns
%
%
µs
µs
ns
MIN
TYP
1.6
0.1
0.1
0.1
5.0
5.0
µA
MAX
UNITS
mA
MAX19192
I
ODD
Note 1:
Specifications
≥
+25°C guaranteed by production test, < +25°C guaranteed by design and characterization.
Note 2:
SNR, SINAD, SFDR, HD3, and THD are based on a differential analog input voltage of -0.5dBFS referenced to the amplitude
of the digital output. SNR and THD are calculated using HD2 through HD6.
Note 3:
The power consumption of the output driver is proportional to the load capacitance (CL).
Note 4:
Guaranteed by design and characterization. Not production tested.
Note 5:
SINAD settles to within 0.5dB of its typical value.
Note 6:
Amplitude/phase matching is measured by applying the same signal to each channel, and comparing the magnitude and
phase of the fundamental bin on the calculated FFT.
_______________________________________________________________________________________
5
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