AD7416-7418 Analog Devices, AD7416-7418 Datasheet - Page 7

• Manufacturer Part Number: AD7416-7418
• Description: 10-Bit Digital Temperature Sensor (AD7416) and Single/Four-Channel ADC (AD7417/AD7418)
• Manufacturer: Analog Devices

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An I
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). The AD7416 and AD7418 are available in
8-lead SOIC and SOIC packages.
PRODUCT HIGHLIGHTS
1. The AD7416/AD7417/AD7418 have an on-chip tempera-
2. The AD7417 offers a space saving 10-bit A/D solution with
3. The automatic power-down feature enables the AD7416/
REV. B
ture sensor that allows an accurate measurement of the am-
bient temperature ( 1 C @ +25 C, 2 C over temperature)
to be made. The measurable temperature range is –55 C to
+125 C. An over-temperature indicator is implemented by
carrying out a digital comparison of the ADC code for
Channel 0 (temperature sensor) with the contents of the on-
chip over-temperature register.
four external voltage input channels, an on-chip temperature
sensor, an on-chip reference and clock oscillator.
AD7417/AD7418 to achieve superior power performance.
At slower throughput rates the part can be programmed to
operate in a low power shutdown mode allowing further
savings in power consumption.
2
C-compatible serial interface allows the AD7416/AD7417/
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TERMINOLOGY
Relative Accuracy
Relative accuracy or endpoint nonlinearity is the maximum
deviation from a straight line passing through the endpoints of
the ADC transfer function.
Differential Nonlinearity
This is the difference between the measured and the ideal
1 LSB change between any two adjacent codes in the ADC.
Offset Error
This is the deviation of the first code transition (0000 . . . 000)
to (0000 . . . 001) from the ideal, i.e., GND + 1 LSB.
Offset Error Match
This is the difference in Offset Error between any two channels.
Gain Error
This is the deviation of the last code transition (1111 . . . 110)
to (1111 . . . 111) from the ideal, i.e., VREF – 1 LSB, after the
offset error has been adjusted out.
Gain Error Match
This is the difference in gain error between any two channels.
Track/Hold Acquisition Time
Track/hold acquisition time is the time required for the output
of the track/hold amplifier to reach its final value, within 1/2
LSB, after the end of conversion (the point at which the track/
hold returns to track mode). It also applies to situations where a
change in the selected input channel takes place or where there
is a step input change on the input voltage applied to the se-
lected A
user must wait for the duration of the track/hold acquisition
time after the end of conversion or after a channel change/step
input change to A
sure that the part operates to specification.
IN
input of the AD7417 or AD7418. It means that the
IN
before starting another conversion, to en-
AD7416/AD7417/AD7418