AD7416-7418 Analog Devices, AD7416-7418 Datasheet
AD7416-7418
Related parts for AD7416-7418
AD7416-7418 Summary of contents
Page 1
... V to +5.5 V power supply. The de- vices contain successive-approximation converter, a 5-channel multiplexer, a temperature sensor, a clock oscillator, a track/hold, and a reference (+2.5 V). The AD7416 is a tem- perature-monitoring-only device in an 8-lead package. The temperature sensor on the parts can be accessed via multi- plexer Channel 0. When Channel 0 is selected and a conversion ...
Page 2
... AD7416/AD7417/AD7418 AD7417/AD7418–SPECIFICATIONS Parameter DC ACCURACY Resolution Minimum Resolution for Which No Missing Codes are Guaranteed 2 Relative Accuracy 2 Differential Nonlinearity 2 Gain Error 2 Gain Error Match 2 Offset Error Offset Error Match ANALOG INPUTS Input Voltage Range 3 Input Leakage Current Input Capacitance 1 TEMPERATURE SENSOR Measurement Error ...
Page 3
... All Digital Inputs 400 pF OUT AD7416/AD7417/AD7418 s See Figure 1 ns See Figure 1 ns See Figure 1 ns See Figure 1 ns See Figure 1 ns See Figure +85 C max min) ...
Page 4
... AD7416/AD7417/AD7418 Pin No. Mnemonic Description Connection. Do not connect anything to this pin. 2 SDA Digital I/O. Serial Bus Bidirectional Data. Push-pull output. 3 SCL Digital Input. Serial Bus Clock. 4 OTI This is a logic output. The Over Temperature Indicator (OTI) is set if the result of a conversion on Channel 0 (temperature sensor) is greater than an 8-bit word in the Over Temperature Register (OTR) ...
Page 5
... AD7416 SCL 2 7 TOP VIEW 3 6 OTI (Not to Scale) GND 4 5 REV. B AD7416 PIN FUNCTION DESCRIPTION AD7418 PIN FUNCTION DESCRIPTION pin should be tied to GND external reference is con –5– AD7416/AD7417/AD7418 . The analog input channel is selected by writing REF ...
Page 6
... ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the AD7416/AD7417/AD7418 features proprietary ESD protection circuitry, perma- nent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality ...
Page 7
... C-compatible serial interface allows the AD7416/AD7417/ AD7418 registers to be written to and read back. The 3 LSBs of the AD7416/AD7417’s serial bus address can be selected, which allows up to eight AD7416/AD7417s to be connected to a single bus. The AD7417 is available in a narrow body 0.15'' 16-lead small outline IC (SOIC) and in a 16-lead, thin shrink small outline package (TSSOP) ...
Page 8
... The AD7417 and AD7418 are single- and four-channel conversion time, 10-bit A/D converters with on-chip tempera- ture sensor, reference and serial interface logic functions on a single chip. The AD7416 has no analog input channel and is intended for temperature measurement only. The A/D converter section consists of a conventional successive-approximation converter based around a capacitor DAC ...
Page 9
... AD7418. Bits control the channel selection as out- lined in Table VI. These bits should always be 0,0,0 for the AD7416. Bits D4 and D3 are used to set the length of the fault queue. D2 sets the sense of the OTI output. D1 selects com- parator or interrupt mode of operation, and D0 selects shut- down mode ...
Page 10
... SERIAL BUS ADDRESS As with all I have a 7-bit serial address. The four MSBs of this address for the AD7416 are set to 1001, the AD7417 are 0101, while the three LSBs can be set by the user by connecting the ...
Page 11
... Figure 8. Writing to the Address Pointer Register Followed by a Single Byte of Data to the Selected Data Register REV. B WRITING TO THE AD7416/AD7417/AD7418 Depending on the register being written to, there are three dif- ferent writes for the AD7416/AD7417/AD7418. 1. Writing to the Address Pointer Register for a subsequent read. In order to read data from a particular register, the Address Pointer Register must contain the address of that register ...
Page 12
... Figure 11. Reading Two Bytes of Data from Register. READING DATA FROM THE AD7416/AD7417/AD7418 HYST Reading data from the AD7416/AD7417/AD7418 is a one or two byte operation. Reading back the contents of the Configura- and OTI tion Register is a single byte read operation, as shown in Figure 10, the register address previously having been set by a single- byte write operation to the address pointer register ...
Page 13
... A and full power-down is initiated when the configuration register. When a measurement is required, a write operation can be performed to power-up the –13– AD7416/AD7417/AD7418 ) must occur. Any reading that breaks HYST followed by a reading less than OTI = 3 V, for each 400 s cycle, the AD7416 spends 0.9 = 1.2 mW ...
Page 14
... Water resistant varnishes and conformal coatings can be used for protection. The small size of the AD7416 package allows mounted inside sealed metal probes, which provide a safe environment for the device. ...
Page 15
... R1 10k Figure 15. Multiple Connection of AD7416s to a Single Serial Bus REV. B SYSTEM WITH MULTIPLE AD7416s The three LSBs of the AD7416’s serial address can be set by , the user, allowing eight different addresses from 1001000 to HYST . 1001111. Figure 15 shows a system in which eight AD7416s are ...
Page 16
... AD7416/AD7417/AD7418 16-Lead Narrow Body (SOIC) (R-16A) 0.3937 (10.00) 0.3859 (9.80 0.1574 (4.00) 0.2440 (6.20) 0.1497 (3.80 0.2284 (5.80) 0.0688 (1.75) PIN 1 0.0098 (0.25) 0.0532 (1.35) 0.0040 (0.10) 0.0500 0.0192 (0.49) SEATING 0.0099 (0.25) (1.27) 0.0138 (0.35) PLANE BSC 0.0075 (0.19) 8-Lead Narrow Body (SOIC) (SO-8) 0.1968 (5.00) 0.1890 (4.80 0.1574 (4.00) 0.2440 (6.20) 0.1497 (3.80 0.2284 (5.80) PIN 1 0.0688 (1.75) ...