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PDF ADT7411 Data sheet ( Hoja de datos )
| Número de pieza | ADT7411 | |
| Descripción | 10-Bit Digital Temperature Sensor and 8-Channel ADC | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ADT7411 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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SPI®-/I2C®-Compatible, 10-Bit Digital
Temperature Sensor and 8-Channel ADC
ADT7411
FEATURES
10-bit temperature-to-digital converter
10-bit 8-channel ADC
DC input bandwidth
Input range: 0 V to 2.25 V and 0 V to VDD
Temperature range: −40°C to +120°C
Temperature sensor accuracy of ±0.5°C
Supply range: 2.7 V to 5.5 V
Power-down current : <10 μA
Internal 2.25 VREF option
Double-buffered input logic
I2C, SPI, QSPI™, MICROWIRE™, and DSP compatible
4-wire serial interface
SMBus packet error checking (PEC) compatible
16-lead QSOP
APPLICATIONS
Portable battery-powered instruments
PCs
Smart battery chargers
Telecommunications systems electronic test equipment
Domestic appliances
Process controls
GENERAL DESCRIPTION
The ADT74111 combines a 10-bit temperature-to-digital
converter and a 10-bit 8-channel ADC in a 16-lead QSOP. This
includes a band gap temperature sensor and a 10-bit ADC to
monitor and digitize the temperature reading to a resolution of
0.25°C. The ADT7411 operates from a single 2.7 V to 5.5 V
supply. The input voltage on the ADC channels has a range of
0 V to 2.25 V and the input bandwidth is dc. The reference for
the ADC channels is derived internally. The ADT7411 provides
two serial interface options: a 4-wire serial interface compatible
with SPI, QSPI, MICROWIRE, and DSP interface standards,
and a 2-wire SMBus/I2C interface. It features a standby mode
that is controlled via the serial interface.
PIN CONFIGURATION
AIN6 1
AIN5 2
NC 3
CS 4
GND 5
VDD 6
D+/AIN1 7
D–/AIN2 8
16 AIN7
ADT7411
TOP VIEW
(Not to Scale)
15 AIN8
14 AIN4
13 SCL/SCLK
12 SDA/DIN
11 DOUT/ADD
10 INT/INT
9 AIN3
NC = NO CONNECT
Figure 1.
The ADT7411’s wide supply voltage range, low supply current,
and SPI-/I2C-compatible interface make it ideal for a variety of
applications, including PCs, office equipment, and domestic
appliances.
1 Protected by U.S. Patent Numbers: 6,169,442; 5,867,012; 5,764174.
Rev. B
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2006 Analog Devices, Inc. All rights reserved.
1 page  
ADT7411
Parameter1
POWER REQUIREMENTS
VDD
VDD Settling Time
IDD (Normal Mode)8
IDD (Power-Down Mode)
Power Dissipation
Min Typ Max Unit
2.7 5.5 V
50 ms
3 mA
2.2 3
mA
10 μA
10 μA
10 mW
33 μW
Conditions/Comments
VDD settles to within 10% of its final voltage level.
VDD = 3.3 V, VIH = VDD and VIL = GND.
VDD = 5 V, VIH = VDD and VIL = GND.
VDD = 3.3 V, VIH = VDD and VIL = GND.
VDD = 5 V, VIH = VDD and VIL = GND.
VDD = 3.3 V. Using normal mode.
VDD = 3.3 V. Using shutdown mode.
1 See the Terminology section.
2 Round robin is the continuous sequential measurement of the following channels: VDD, internal temperature, external temperature (AIN1, AIN2), AIN3, AIN4, AIN5,
AIN6, AIN7, and AIN8.
3 Guaranteed by design and characterization, not production tested.
4 The SDA and SCL timing is measured with the input filters turned on so as to meet the fast-mode I2C specification. Switching off the input filters improves the transfer
rate but has a negative effect on the EMC behavior of the part.
5 Guaranteed by design. Not tested in production.
6 The interface is also capable of handling the I2C standard mode rise time specification of 1000 ns.
7 All input signals are specified with tr = tf = 5 ns (10% to 90% of VDD), and timed from a voltage level of 1.6 V.
8 IDD specification is valid for full-scale analog input voltages. Interface inactive. ADC active. Load currents excluded.
SCL
SDA
DATA IN
SDA
DATA OUT
t4
t1
t2
t3
Figure 2. I2C Bus Timing Diagram
t5
t6
t7
CS
SCLK
DIN
DOUT
t1 t2
t3 t5 t6
D7 D6 D5 D4 D3 D2 D1 D0 X X X X X X X
t4
X X X X X X X X D7 D6 D5 D4 D3 D2 D1
Figure 3. SPI Bus Timing Diagram
t7
X
t8
D0
200µA
IOL
TO
OUTPUT
PIN CL
50pF
1.6V
200µA
IOH
Figure 4. Load Circuit for Access Time and Bus Relinquish Time
Rev. B | Page 5 of 36
5 Page 
15
VDD = 3.3V
TEMPERATURE = 25°C
10
5
D+ TO GND
0
–5 D+ TO VCC
–10
–15
–20
–25
0
10 20 30 40 50 60 70 80 90 100
PCB LEAKAGE RESISTANCE (MΩ)
Figure 13. External Temperature Error vs. PCB Leakage Resistance
10
VDD = 3.3V
8
COMMON-MODE
VOLTAGE = 100mV
6
4
2
0
–2
–4
–6
1
100 200 300 400 500
NOISE FREQUENCY (Hz)
Figure 14. External Temperature Error vs.
Common-Mode Noise Frequency
3
OFFSET ERROR
2
600
1
0
–1
–2
GAIN ERROR
–3
2.7 3.1 3.5 3.9 4.3 4.7 5.1
VDD (V)
Figure 15. ADC Offset Error and Gain Error vs. VDD
5.5
ADT7411
0
VDD = 3.3V
–10
–20
–30
–40
–50
–60
0
5 10 15 20 25 30 35 40 45 50
CAPACITANCE (nF)
Figure 16. External Temperature Error vs. Capacitance Between D+ and D−
70
VDD = 3.3V
60 DIFFERENTIAL-MODE
VOLTAGE = 100mV
50
40
30
20
10
0
–10
1
100 200 300 400 500 600
NOISE FREQUENCY (MHz)
Figure 17. External Temperature Error vs. Differential Mode Noise Frequency
0.6
VDD = 3.3V
0.4
0.2
0
–0.2
–0.4
±250mV
–0.6
1
100 200
300 400 500 600
NOISE FREQUENCY (Hz)
Figure 18. Internal Temperature Error vs. Power Supply Noise Frequency
Rev. B | Page 11 of 36
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet ADT7411.PDF ] | |
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