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參數(shù)資料
| 型號： | AD7792BRU |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 10/33頁 |
| 文件大小： | 0K |
| 描述： | IC ADC 16BIT 3CH LP 16-TSSOP |
| 標準包裝： | 96 |
| 位數(shù)： | 16 |
| 采樣率（每秒）： | 500 |
| 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）： | 2.5mW |
| 電壓電源： | 模擬和數(shù)字 |
| 工作溫度： | -40°C ~ 105°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： | 管件 |
| 輸入數(shù)目和類型： | 3 個差分，單極；3 個差分，雙極 |
| 配用： | EVAL-AD7792EBZ-ND - BOARD EVALUATION FOR AD7792 |
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AD7792/AD7793
Rev. B | Page 17 of 32
FS3
FS2
FS1
FS0
fADC (Hz)
tSETTLE (ms)
Rejection @ 50 Hz/60 Hz (Internal Clock)
1
0
1
16.7
120
80 dB (50 Hz only)
1
0
1
0
16.7
120
65 dB (50 Hz and 60 Hz)
1
0
1
12.5
160
66 dB (50 Hz and 60 Hz)
1
0
10
200
69 dB (50 Hz and 60 Hz)
1
0
1
8.33
240
70 dB (50 Hz and 60 Hz)
1
0
6.25
320
72 dB (50 Hz and 60 Hz)
1
4.17
480
74 dB (50 Hz and 60 Hz)
CONFIGURATION REGISTER
RS2, RS1, RS0 = 0, 1, 0; Power-On/Reset = 0x0710
The configuration register is a 16-bit register from which data can be read or to which data can be written. This register is used to con-
figure the ADC for unipolar or bipolar mode, enable or disable the buffer, enable or disable the burnout currents, select the gain, and
select the analog input channel. Table 17 outlines the bit designations for the filter register. CON0 through CON15 indicate the bit
locations; CON denotes that the bits are in the configuration register. CON15 denotes the first bit of the data stream. The number in
parentheses indicates the power-on/reset default status of that bit.
CON15
CON14
CON13
CON12
CON11
CON10
CON9
CON8
VBIAS1(0)
VBIAS0(0)
BO(0)
U/B(0)
BOOST(0)
G2(1)
G1(1)
G0(1)
CON7
CON6
CON5
CON4
CON3
CON2
CON1
CON0
REFSEL(0)
0(0)
BUF(1)
0(0)
CH2(0)
CH1(0)
CH0(0)
Table 17. Configuration Register Bit Designations
Bit Location
Bit Name
Description
CON15 to
CON14
VBIAS1 to
VBIAS0
Bias Voltage Generator Enable. The negative terminal of the analog inputs can be biased up to AVDD/2. These
bits are used in conjunction with the boost bit.
VBIAS1
VBIAS0
Bias Voltage
0
Bias voltage generator disabled
0
1
Bias voltage connected to AIN1(
)
1
0
Bias voltage connected to AIN2(
)
1
Reserved
CON13
BO
Burnout Current Enable Bit. When this bit is set to 1 by the user, the 100 nA current sources in the signal path
are enabled. When BO = 0, the burnout currents are disabled. The burnout currents can be enabled only
when the buffer or in-amp is active.
CON12
U/B
Unipolar/Bipolar Bit. Set by user to enable unipolar coding; that is, zero differential input results in 0x000000
output, and a full-scale differential input results in 0xFFFFFF output. Cleared by the user to enable bipolar
coding. Negative full-scale differential input results in an output code of 0x000000, zero differential input
results in an output code of 0x800000, and a positive full-scale differential input results in an output code of
0xFFFFFF.
CON11
BOOST
This bit is used in conjunction with the VBIAS1 and VBIAS0 bits. When set, the current consumed by the bias
voltage generator is increased. This reduces its power-up time.
CON10 to
CON8
G2 to G0
Gain Select Bits.
Written by the user to select the ADC input range as follows:
G2
G1
G0
Gain
ADC Input Range (2.5 V Reference)
0
1 (In-amp not used)
2.5 V
0
1
2 (In-amp not used)
1.25 V
0
1
0
4
625 mV
0
1
8
312.5 mV
1
0
16
156.2 mV
1
0
1
32
78.125 mV
1
0
64
39.06 mV
1
128
19.53 mV
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