ADS5287 Datasheet, PDF (16/31 Pages) Texas Instruments – 10-Bit, Octal-Channel ADC Up to 65MSPS

ADS5287
SBAS428 – JANUARY 2008
www.ti.com
DESCRIPTION OF SERIAL REGISTERS
SOFTWARE RESET
ADDRESS
IN HEX
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
00
X
NAME
RST
Software reset is applied when the RST bit is set to '1'; setting this bit resets all internal registers and self-clears
to '0'.
POWER-DOWN MODES
ADDRESS
IN HEX
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
X
X
X
X
X
X
X
X
X
0F
0
X
X
0
NAME
PDN_CH<8:1>
PDN_PARTIAL
PDN_COMPLETE
PDN_PIN_CFG
Each of the eight channels can be individually powered down. PDN_CH<N> controls the power-down mode for
the ADC channel <N>.
In addition to channel-specific power-down, the ADS5287 also has two global power-down modes—partial
power-down mode and complete power-down mode. Partial power-down mode partially powers down the chip;
recovery from this mode is much quicker, provided that the clock has been running for at least 50µs before
exiting this mode. Complete power-down mode, on the other hand, completely powers down the chip, and
involves a much longer recovery time.
In addition to programming the device for either of these two power-down modes (through either the
PDN_PARTIAL or PDN_COMPLETE bits, respectively), the PD pin itself can be configured as either a partial
power-down pin or a complete power-down pin control. For example, if PDN_PIN_CFG = 0 (default), when the
PD pin is high, the device enters complete power-down mode. However, if PDN_PIN_CFG = 1, when the PD pin
is high, the device enters partial power-down mode.
LVDS DRIVE PROGRAMMABILITY
ADDRESS
IN HEX
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
X
X
X
11
X
X
X
X
X
X
NAME
ILVDS_LCLK<2:0>
ILVDS_FRAME<2:0>
ILVDS_DAT<2:0>
The LVDS drive strength of the bit clock (LCLK_P or LCLK_N) and the frame clock (ADCLK_P or ADCLK_N) can be
individually programmed. The LVDS drive strengths of all the data outputs OUT_P and OUT_N can also be
programmed to the same value.
16
Submit Documentation Feedback
Product Folder Link(s): ADS5287
Copyright © 2008, Texas Instruments Incorporated