RLD1P = 1 RLD1N = 1 MUX1[3:0] = 0111 PGA1 RLD2P = 0 RLD2N = 0 PGA2 RLD_AMP RLDOUT RLDIN" />
參數資料
型號: ADS1191IPBSR
廠商: Texas Instruments
文件頁數: 41/67頁
文件大小: 0K
描述: IC AFE 16BIT 8KSPS 1CH 32TQFP
標準包裝: 1,000
位數: 16
通道數: 1
電壓 - 電源,模擬: 2.7 V ~ 5.25 V
電壓 - 電源,數字: 1.7 V ~ 3.6 V
封裝/外殼: 32-TQFP
供應商設備封裝: 32-TQFP(5x5)
包裝: 帶卷 (TR)
MUX1[3:0] = 0000
RLD1P = 1
RLD1N = 1
MUX1[3:0] = 0111
PGA1
RLD2P = 0
RLD2N = 0
PGA2
RLD_AMP
RLDOUT
RLDINV
RLDIN/RLDREF
Filter or
Feedthrough
Device
EMI
Filter
EMI
Filter
IN1P
IN1N
IN2P
IN2N
MUX
1 M
(1)
1.5 nF
(1)
2
(AVDD + AVSS)
RLDREF_INT = 1
RLDREF_INT = 0
SBAS566A – DECEMBER 2011 – REVISED SEPTEMBER 2012
ECG-SPECIFIC FUNCTIONS
INPUT MULTIPLEXER (REROUTING THE RIGHT LEG DRIVE SIGNAL)
The input multiplexer has ECG-specific functions for the right leg drive signal. The RLD signal is available at the
RLDOUT pin once the appropriate channels are selected for the RLD derivation, feedback elements are installed
external to the chip, and the loop is closed. This signal can be fed after filtering or fed directly into the RLDIN pin
as shown in Figure 42. This RLDIN signal can be multiplexed into any one of the input electrodes by setting the
MUX bits of the appropriate channel set registers to '0110' for P-side or '0111' for N-side. Figure 42 shows the
RLD signal generated from channel 1 and routed to the N-side of channel 2. This feature can be used to
dynamically change the electrode that is used as the reference signal to drive the patient body. Note that the
corresponding channel cannot be used and can be powered down.
(1) Typical values for example only.
Figure 42. Example of RLDOUT Signal Configured to be Routed to IN2N
46
Copyright 2011–2012, Texas Instruments Incorporated
Product Folder Links: ADS1191 ADS1192
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