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| 型號： | AD7914BRUZ-REEL7 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 3/32頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 10BIT 4CH W/SEQ 16TSSOP |
| 標(biāo)準(zhǔn)包裝： | 1,000 |
| 位數(shù)： | 10 |
| 采樣率（每秒）： | 1M |
| 數(shù)據(jù)接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 功率耗散（最大）： | 13.5mW |
| 電壓電源： | 單電源 |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-TSSOP（0.173"，4.40mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 16-TSSOP |
| 包裝： | 帶卷 (TR) |
| 輸入數(shù)目和類型： | 4 個單端，單極 |
| 配用： | EVAL-AD79X4CBZ-ND - BOARD EVALUATION FOR AD79X4CBZ |
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Data Sheet
AD7904/AD7914/AD7924
Rev. C | Page 11 of 32
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
1
2
3
4
5
6
7
8
DIN
CS
AGND
REFIN
AVDD
SCLK
AGND
16
15
14
13
12
11
10
9
VDRIVE
DOUT
AGND
VIN2
VIN3
VIN1
VIN0
AGND
AD7904/
AD7914/
AD7924
TOP VIEW
(Not to Scale)
03087-
003
Figure 3. Pin Configuration
Table 6. Pin Function Descriptions
Pin No.
Mnemonic
Function
1
SCLK
Serial Clock, Logic Input. SCLK provides the serial clock for accessing data from the part. This clock input is also
used as the clock source for the AD7904/AD7914/AD7924 conversion process.
2
DIN
Data In, Logic Input. Data to be written to the control register of the AD7904/AD7914/AD7924 is provided on
this input and is clocked into the register on the falling edge of SCLK (see the Control Register section).
3
CS
Chip Select. Active low logic input. This input provides the dual function of initiating conversions on the
AD7904/AD7914/AD7924 and frames the serial data transfer.
4, 8, 13, 16
AGND
Analog Ground. Ground reference point for all analog circuitry on the AD7904/AD7914/AD7924. All analog
input signals and any external reference signal should be referred to this AGND voltage. All AGND pins should
be connected together.
5, 6
AVDD
Analog Power Supply Input. The AVDD range for the AD7904/AD7914/AD7924 is from 2.7 V to 5.25 V. For the 0 V
to 2 × REFIN range, AVDD should be from 4.75 V to 5.25 V.
7
REFIN
Reference Input for the AD7904/AD7914/AD7924. An external reference must be applied to this input. The
voltage range for the external reference is 2.5 V ± 1% for specified performance.
9, 10, 11,
12
VIN3, VIN2,
VIN1, VIN0
Analog Input 0 through Analog Input 3. The four single-ended analog input channels are multiplexed into the
on-chip track-and-hold. The analog input channel to be converted is selected using the address bits ADD1 and
ADD0 of the control register. The address bits, in conjunction with the SEQ1 and SEQ0 bits, allow the sequencer
to be programmed. The input range for all input channels can extend from 0 V to REFIN or from 0 V to 2 × REFIN
as selected via the RANGE bit in the control register. Any unused input channels should be connected to AGND
to avoid noise pickup.
14
DOUT
Data Out, Logic Output. The conversion result from the AD7904/AD7914/AD7924 is provided on this output as a
serial data stream. The bits are clocked out on the falling edge of the SCLK input. The data stream from the
AD7904 consists of two leading zeros, two address bits indicating which channel the conversion result
corresponds to, followed by the eight bits of conversion data, followed by four trailing zeros, provided MSB first.
The data stream from the AD7914 consists of two leading zeros, two address bits indicating which channel the
conversion result corresponds to, followed by the 10 bits of conversion data, followed by two trailing zeros,
provided MSB first. The data stream from the AD7924 consists of two leading zeros, two address bits indicating
which channel the conversion result corresponds to, followed by the 12 bits of conversion data, provided MSB
first. The output coding can be selected as straight binary or twos complement via the CODING bit in the
control register.
15
VDRIVE
Logic Power Supply Input. The voltage supplied at this pin determines the voltage at which the serial interface
of the AD7904/AD7914/AD7924 operates.
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