MAX71071H+ [SILERGY]
Dual-Channel Isolated Metrology ADCs;
| 型号： | MAX71071H+ |
| 厂家： | 
SILERGY |
| 描述： | Dual-Channel Isolated Metrology ADCs 光电二极管 |
| 文件： | 总11页 (文件大小：255K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MAX71071/MAX71071H
Dual-Channel Isolated Metrology ADCs
General Description
Benefi ts and Features
● Accurately Measure Voltage and Current
The MAX71071/MAX71071H are dual-channel iso-
lated analog-to-digital converters (ADCs) for use with
a compatible MAX71xxx host. The device provides
current and voltage measurements to the host while
the host provides control, command, and power to the
MAX71071/MAX71071H. A pulse transformer provides
the isolated data, clock, and power path between the
device and host, eliminating the need for additional
isolation components in the measurement subsystem.
These metrology ADCs operate over the industrial tem-
perature range and come in a 10-pin μSOP package.
• Dual 24-Bit ADC
• 0.1% Accuracy Over 2000:1 Dynamic Range
• Exceeds IEC 62053/ANSI C12.20 Standards
• On-Chip Temperature Sensor Enables Localized
Digital Temperature Compensation
● Galvanic Isolation Through Pulse Transformer
Provides Power, Bidirectional Data, and Timing
Reference
• 1.4mA Typical Consumption
• On-Chip PLL and Power Monitoring
Ordering Information appears at end of data sheet.
Block Diagram
MAX71071/MAX71071H
REFERENCE
TEMP SENSOR
P
R
E
A
M
P
INVP
INVN
INIP
ADC
PLL
FIR
HOST MICROCONTROLLER
(MAX71xxx)
P
R
E
A
M
P
ISO
I/F
ADC
FIR
ININ
Rev 2; 4/16
MAX71071/MAX71071H
Dual-Channel Isolated Metrology ADCs
Absolute Maximum Ratings
(All voltages with respect to V
.)
Digital Pins
SSA
Supplies and Ground Pins
TEST....................................-10mA to +10mA, -0.5V to +3.6V
Operating Junction Temperature (peak, 100ms).............+140°C
Operating Junction Temperature (continuous)................+125°C
Storage Temperature........................................ -45°C to +165°C
Solder Temperature (10s duration) .................................+250°C
V
V
...................................................................-0.5V to +3.6V
...................................................................-0.1V to +0.1V
CC
SS
Analog Input Pins
INP, INN, SP, SN .....-10mA to +10mA, -0.5V to (V
+ 0.5V)
CC
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.
Package Thermal Characteristics (Note 1)
µSOP
Junction-to-Ambient Thermal Resistance (θ
)
Junction-to-Case Thermal Resistance (θ )................42°C/W
JC
JA
Multilayer Board ................................................113.10°C/W
Single-Layer Board..................................................180°C/W
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board.
Recommended External Components
NAME
FROM
TO
FUNCTION
VALUE
UNITS
C1
V
V
Bypass capacitor for supply
1.0
µF
CC
SS
To establish proper bias for INVN/INVP and
ININ/INIP pins
R1, R2, R3, R4
Sensor
GND
1.0
kΩ
INVN
1kΩ
INVP
1kΩ
ININ
1kΩ
INIP
MAX71071/MAX71071H
1kΩ
VSS
1µF
VCC
Figure 1. Recommended External Components Circuit
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MAX71071/MAX71071H
Dual-Channel Isolated Metrology ADCs
Recommended Operating Conditions
PARAMETER
CONDITIONS
MIN
2.5
TYP
MAX
3.6
UNITS
V
V
Supply Voltage
CC
Operating Temperature Range
-40
+85
°C
Perfiormance Specifi cations
(Limits are production tested at T = +25°C. Limits over the operating temperature range and relevant supply voltage range are guar-
A
anteed by design and characterization.)
PARAMETER
CONDITIONS
MIN
TYP
1.2
MAX
UNITS
SUPPLY CURRENT
V
= 3.3V, voltage ADC preamp
CC
V
Current, Normal Operation
1.6
mA
CC
bypassed
V
REF
V
(22), V
Output Voltage
T = +22°C
A
1.1925
-2.4
1.195
1.1975
+2.4
V
REF
REF
V
Power Supply Sensitivity
REF
mV/V
ΔV
/ΔV
REF
CC
V
(T) = V
(22) + (T - 22) x TC1 +
NOM
REF
V
Defi nition
V
NOM
2
(T - 22) x TC2 (Note 2)
IF TRIMBGB AVAILABLE (NOT 00)
V
V
(T) Deviation from
REF
(T)
NOM
(Note 3)
0
ppm/°C
[(V
x [10 /62]
(T) - V
(T))/V
(T)]
REF
NOM
NOM
6
IF TRIMBGB NOT AVAILABLE (TRIMBGB = 00)
V
V
(T) Deviation from
REF
(T)
NOM
(Note 3)
0
ppm/°C
LSB
[(V
x [10 /62]
(T) - V
(T))/V
(T)]
REF
NOM
NOM
6
V
VOLTAGE MONITOR
CC
BNOM: Nominal Value,
= +22°C
V
= 3.0V
120
CC
T
A
V
Voltage
V
= 3.0 + (BSENSE - 120) x 0.0244 (Note 4)
-150
V
CC
CC
Measurement Error
+150
mV
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MAX71071/MAX71071H
Dual-Channel Isolated Metrology ADCs
Perfiormance Specifi cations (continued)
(Limits are production tested at T = +25°C. Limits over the operating temperature range and relevant supply voltage range are guar-
A
anteed by design and characterization.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
TEMPERATURE MONITOR
T
T
: Nominal Value,
= +22°C
NOM
945
0
LSB
°C
A
Temperature Error
T
= -40°C, -10°C, +55°C, +85°C (Note 3)
A
TETIME: Duration of
Temperature Measurement
V
= 3.0V
14
30
ms
CC
POWER PULSE
Power Pulse Frequency
PULSE IO
1.638
MHz
V
0.28
-
CC
SP Output V
(ONE Pulse)
I
= 1mA
= 1mA
= 1mA
= 1mA
V
V
V
V
OH
OH
SN Output V (ONE Pulse)
I
I
I
0.287
OL
OL
OH
OL
V
0.28
-
CC
SN Output V
(ZERO Pulse)
OH
SP Output V (ZERO Pulse)
OL
0.287
PREAMP
Gain = 14x
-2%
-2%
-2%
14
9
+2%
+2%
+2%
V/V
V/V
V/V
m°
Gain = 9x
Gain = 4x
4
Phase Shift
1
Phase Shift Variation vs. Supply
(Note 3)
-10
-0.1
7.5
+10
+0.1
24
m°/V
Phase Shift Variation vs.
Temperature
(Note 3)
m°/°C
µA
Input Current
Preamp gain = 4x, 9x, 14x
13
ADC CONVERTER
Usable Input Range (I
- I
)
-250/gain
250/gain
mV
PK
NP NN
THD (FIRST 10 HARMONICS)
V
= 65Hz, 64kpts FFT,
IN
Preamp Gain = 1x
85
85
dB
Blackman-Harris window
V = 65Hz, 64kpts FFT,
IN
250mV /Preamp Gain,
PK
Preamp Gain = 4x, 9x, 14x
dB
Blackman-Harris window
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MAX71071/MAX71071H
Dual-Channel Isolated Metrology ADCs
Perfiormance Specifi cations (continued)
(Limits are production tested at T = +25°C. Limits over the operating temperature range and relevant supply voltage range are guar-
A
anteed by design and characterization.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
20mV /Preamp Gain,
PK
V
= 65Hz, 64kpts FFT,
IN
85
dB
Preamp Gain = 4x, 9x, 14x
Input Impedance
Blackman-Harris window
Preamp bypassed
Preamp = 4x
20
6.5
3.5
2.3
40
18
12
6.3
4.3
kΩ
Preamp = 9x
9.1
6.3
Preamp = 14x
LSB SIZE
Preamp Gain = 14x
Preamp Gain = 9x
Preamp Gain = 4x
FIR length = 100
FIR length = 100
FIR length = 100
22.9
35.5
79.9
nV/LSB
nV/LSB
nV/LSB
Digital Full Scale
L = FIR Length
FIR length = 100
±1,000,000
LSB
ADC Gain Error vs. % Power
Supply Variation
V
V
= 250mV , 55Hz
120
ppm/%
IN
PK
Current Channel Gain Variation
Input Offset, Preamp Bypassed
= 250mV , 55Hz (Note 3)
90
+4
ppm/%
mV
IN
PK
-4
Note 2: This relationship describes the nominal behavior of V
Note 3: Guaranteed by design, not production tested.
Note 4: This is a definition, and it is not a measured quantity.
at different temperatures.
REF
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MAX71071/MAX71071H
Dual-Channel Isolated Metrology ADCs
Pin Confi guration
INVN
INVP
TEST
SN
1
2
3
4
5
10
9
ININ
INIP
MAX71071/
MAX71071H
8
V
V
SS
7
CC
SP
N.C.
6
µSOP
Pin Description
PIN
1
NAME
INVN
INVP
TEST
SN
FUNCTION
Voltage Channel Negative Input
Voltage Channel Positive Input
2
3
Test Mode Enable. Must be grounded in normal operation.
Transformer Negative
4
5
SP
Transformer Positive
6
N.C.
Not Connected
7
V
Power Bypass. Connect 1µF capacitor to ground.
CC
8
V
Ground. The 1µF capacitor from V
Current Channel Positive Input
Current Channel Negative Input
to V must be connected to this pin.
SS
CC SS
9
INIP
ININ
10
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MAX71071/MAX71071H
Dual-Channel Isolated Metrology ADCs
9x, and 10 is 14x. The inputs are V referenced, and the
SS
output of the preamp connects directly to the ADC.
Detailed Description
The MAX71071/MAX71071H are dual-channel isolated
metrology analog-to-digital converters (ADCs) that are com-
patible with MAX71xxx hosts. The device digitizes a current
signal from a shunt type current sensor and/or a voltage
signal from a resistor-divider. The two input channels of
the MAX71071/MAX71071H are identical except that the
voltage channel contains an option to bypass the preamp.
Bandgap
The device includes an on-chip precision bandgap volt-
age reference that incorporates autozero techniques as
well as production trims to minimize errors caused by
component mismatch and drift. The result is a voltage
output with a predictable temperature coefficient that is
compensated in firmware by the host.
The device continuously sends ADC data to the host. The
host can request the device to return certain ancillary data
such as temperature monitor output. The MAX71071/
MAX71071H communicate with the host through a pulse
transformer to provide isolation from the high-voltage
power domain.
Temperature Monitor
The temperature monitor block does a temperature
and a supply measurement whenever the MAX71071/
MAX71071H receives an instruction from a MAX71xxx
host requesting for STEMP or BSENSE. This request
causes the MAX71071/MAX71071H to return STEMP or
BSENSE from the previous measurement and to initiate
a new measurement for both.
The MAX71071/MAX71071H include a rectifier, two star-
ing preamp/ADC channels, bandgap, temperature moni-
tor, PLL, and BIAS block.
Rectifi er
PLL
The active rectifier in the device rectifies the power pulses
received from the host through the isolation transformer
The PLL locks to the incoming power pulses to create ref-
erence clocks for the ADC and communications interface
to the host.
to create the V
that drive the data bits out of the MAX71071/MAX71071H
and through the transformer.
voltage. The block also has the drivers
CC
Pulse IO
The pulse IO block in the MAX71071/MAX71071H
receives the incoming data from the MAX71xxx host
and transmits the data back to the host. The integrated
output is applied to the input of a comparator, and the
comparator output is captured by a flip-flop at the end of
the integration time.
ISO Interfiace
The isolated interface block receives the incoming data
from the host and transmits data back to the host through
the isolation transformer.
Preamp
The preamp is a low-noise differential amplifier. The INP
and INN pins are the differential inputs to the preamp. It
has three gain settings (4x, 9x, and 14x) The gain is con-
trolled by the two preamp gain control bits: 00 is 4x, 01 is
ADC
A proven Teridian delta-sigma ADC digitizes the voltage
and current-sense voltages.
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MAX71071/MAX71071H
Dual-Channel Isolated Metrology ADCs
Functional Diagram
INVN
INVP
ININ
INIP
IBIAS
PLL
VREF
VBIAS
GEN
BANDGAP
PREAMP
PREAMP
VREF
VBIAS
GEN
ADC
ADC
REG
V3P3
FIR
FIR
CLOCK
GEN
TMUXOUT
TEMP/
VCC
MONITOR
VCO_OUT
INTERFACE AND
MODE CONTROL
TEST
TEMP
GND
ISO
INTERFACE
SP
SN
MAX71071/MAX71071H
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MAX71071/MAX71071H
Dual-Channel Isolated Metrology ADCs
Ordering Infiormation
Package Infiormation
PART
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
10 µSOP
Package outline information is appended to this document.
Land patterns (footprints) are inserted below.
MAX71071+
MAX71071+T
MAX71071H+*
MAX71071H+T*
10 µSOP
10 μSOP
10 μSOP
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
*Future product—contact factory for availability.
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MAX71071/MAX71071H
Dual-Channel Isolated Metrology ADCs
Revision History
REVISION REVISION
PAGES
DESCRIPTION
CHANGED
NUMBER
DATE
0
1
2
3/14
Initial release
—
1/15
Updated the Benefi ts and Features section
1
4/16
Rebranding only
Copyright © 2016 Silergy Corp Proprietary information. For Silergy customer use only. Unauthorized distribution or
duplication prohibited. Silergy cannot assume responsibility for use of any circuitry other than circuitry entirely embodied
in a Silergy product. No circuit patent licenses are implied. Silergy reserves the right to change the circuitry and
specifications without notice at any time. Typical parametric values provided in this data sheet are for guidance only
and are not guaranteed.
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