1191 [MAXIM]

Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC; 超低功耗, 7.5Msps ,双8位ADC
1191
元器件型号: 1191
生产厂家: MAXIM INTEGRATED PRODUCTS    MAXIM INTEGRATED PRODUCTS
描述和应用:

Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC
超低功耗, 7.5Msps ,双8位ADC

PDF文件: 总27页 (文件大小:492K)
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MAX34334CSE前5页PDF页面详情预览
19-2836; Rev 1; 9/03
Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC
General Description
The MAX1191 is an ultra-low-power, dual, 8-bit,
7.5Msps 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 MAX1191 delivers a typical signal-to-noise and dis-
tortion (SINAD) of 48.6dB at an input frequency of
1.875MHz and a sampling rate of 7.5Msps while con-
suming only 12mW. 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 MAX1191 features three
power-down modes to conserve power during idle peri-
ods. Excellent dynamic performance, ultra-low power,
and small size make the MAX1191 ideal for applica-
tions in imaging, instrumentation, and digital communi-
cations.
An internal 1.024V precision bandgap reference sets
the full-scale range of the ADC to ±0.512V. A flexible
reference structure allows the MAX1191 to use its inter-
nal reference or accept an externally applied reference
for applications requiring increased accuracy.
The MAX1191 features parallel, multiplexed, CMOS-
compatible tri-state outputs. The digital output format is
offset binary. A separate digital power input accepts a
voltage from 1.8V to 3.6V for flexible interfacing to dif-
ferent logic levels. The MAX1191 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 MAX1191 are also available. Refer to the
MAX1192 data sheet for 22Msps, and the MAX1193
data sheet for 45Msps.
Features
o
Ultra-Low Power
12mW (Normal Operation: 7.5Msps)
0.3µW (Shutdown Mode)
o
Excellent Dynamic Performance
48.7dB SNR at f
IN
= 1.875MHz
69dBc 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 Tri-State Outputs
o
28-Pin Thin QFN Package
o
Evaluation Kit Available (Order MAX1193EVKIT)
MAX1191
Ordering Information
PART
MAX1191ETI-T
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
28 Thin QFN-EP*
(5mm x 5mm)
*EP = Exposed paddle.
Pin Configuration
TOP VIEW
REFIN
REFN
REFP
COM
PD0
PD1
V
DD
28
27
26
25
24
23
22
INA-
Applications
Ultrasound and Medical Imaging
IQ Baseband Sampling
Battery-Powered Portable Instruments
Low-Power Video
WLAN, Mobile DSL, WLL Receiver
1
2
3
4
5
6
7
8
EXPOSED PADDLE
21
20
19
D0
D1
D2
D3
A/B
D4
D5
INA+
GND
CLK
GND
INB+
INB-
MAX1191
18
17
16
15
12
13
D7
10
11
GND
V
DD
V
DD
5mm x 5mm THIN QFN
________________________________________________________________
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.
OGND
OV
DD
D6
14
9
Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC
MAX1191
ABSOLUTE MAXIMUM RATINGS
V
DD
, OV
DD
to GND ...............................................-0.3V to +3.6V
OGND to GND.......................................................-0.3V to +0.3V
INA+, INA-, INB+, INB- to GND .................-0.3V to (V
DD
+ 0.3V)
CLK, REFIN, REFP, REFN, COM to GND ...-0.3V to (V
DD
+ 0.3V)
PD0, PD1 to OGND .................................-0.3V to (OV
DD
+ 0.3V)
Digital Outputs to OGND .........................-0.3V to (OV
DD
+ 0.3V)
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
= 7.5MHz, 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
= 3.75MHz
f
IN
= 1.875MHz
f
IN
= 3.75
47
47
7.5
5.0
5.5
48.7
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
720
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
±0.15
±0.13
±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, 7.5Msps, 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
= 7.5MHz, 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
1dB SNR degradation at Nyquist
1.5
×
full-scale input
V
REFP
- V
COM
V
REFN
- V
COM
V
DD
/ 2
- 0.15
f
IN
= 3.75MHz
f
IN
= 1.875MHz
f
IN
= 3.75MHz
f
IN1
= 1MHz at -7dB FS, f
IN2
= 1.01MHz
at -7dB FS
f
IN1
= 1MHz at -7dB FS, f
IN2
= 1.01MHz
at -7dB FS
f
IN
= 1.875MHz
f
IN
= 3.75MHz
Input at -20dB FS
Input at -0.5dB FS
CONDITIONS
f
IN
= 1.875MHz
MIN
59
TYP
69
68.7
72.0
-70.0
-66
-70
-68.0
-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
MAX1191
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
V
REFIN
V
COM
V
REF
I
SOURCE
V
REFP
- V
REFN
V
DD
/ 2
- 0.15
1.024
V
DD
/ 2
0.512
2
V
DD
/ 2
+ 0.15
V
V
V
mA
_______________________________________________________________________________________
3
Ultra-Low-Power, 7.5Msps, Dual 8-Bit ADC
MAX1191
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
= 7.5MHz, 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
Maximum REFP/REFN/COM Sink
Current
REFIN Input Resistance
REFIN Input Current
UNBUFFERED EXTERNAL REFERENCE
(REFIN = GND, V
REFP
, V
REFN
, and V
COM
are applied
REFP Input Voltage
REFN Input Voltage
COM Input Voltage
Differential Reference Input
Voltage
REFP Input Resistance
REFN Input Resistance
DIGITAL INPUTS
(CLK, PD0, PD1)
CLK
Input High Threshold
V
IH
PD0, PD1
CLK
Input Low Threshold
V
IL
PD0, PD1
Input Hysteresis
Digital Input Leakage Current
Digital Input Capacitance
DIGITAL OUTPUTS
(D7–D0, A/B)
Output Voltage Low
Output Voltage High
Tri-State Leakage Current
Tri-State Output Capacitance
POWER REQUIREMENTS
Analog Supply Voltage
Digital Output Supply Voltage
V
DD
OV
DD
2.7
1.8
3.0
3.6
V
DD
V
V
V
OL
V
OH
I
LEAK
C
OUT
5
I
SINK
= 200µA
I
SOURCE
= 200µA
0.8 x
OV
DD
±5
0.2 x
OV
DD
V
V
µA
pF
V
HYST
DI
IN
DC
IN
CLK at GND or V
DD
PD0 and PD1 at OGND or OV
DD
5
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
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
0.256
-0.256
V
DD
/ 2
0.512
4
4
V
V
V
V
kΩ
kΩ
SYMBOL
I
SINK
CONDITIONS
MIN
TYP
2
>500
-0.7
MAX
UNITS
mA
kΩ
µA
V
V
4
_______________________________________________________________________________________
Ultra-Low-Power, 7.5Msps, 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
= 7.5MHz, 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 -0.5dB FS, CLK input from GND to V
DD
Idle mode (tri-state), f
IN
= 1.875MHz at -
0.5dB FS, CLK input from GND to V
DD
Standby mode, CLK input from GND to
V
DD
Shutdown mode, CLK = GND or V
DD
,
PD0 = PD1 = OGND
Normal operating mode,
f
IN
= 1.875MHz at -0.5dB FS, C
L
10pF
Digital Output Supply Current
(Note 3)
Idle mode (tri-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 -0.5dB FS,
f
IN,Y
= 0.3MHz at -0.5dB FS (Note 6)
f
IN
= 1.875MHz at -0.5dB FS (Note 7)
f
IN
= 1.875MHz at -0.5dB FS (Note 7)
-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
4.0
4.0
2.2
0.1
1.0
0.1
0.1
0.1
5.0
5.0
µA
5.0
µA
mA
MAX
5.0
mA
UNITS
MAX1191
Analog Supply Current
I
DD
I
ODD
_______________________________________________________________________________________
5
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