ADS6145 datasheet(21/68 Pages) TI

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PIN CONFIGURATION (CMOS MODE)

DRVDD

AGND

CLKP

CLKM

RESET

SCLK

SDATA

SEN

PadConnected To

DRGND

ADS6145, ADS6144

ADS6143, ADS6142

SLWS198A – JULY 2007 – REVISED OCTOBER 2007

RHB PACKAGE

(TOP VIEW)

Figure 7. CMOS Mode Pinout

PIN ASSIGNMENTS – CMOS Mode

NUMBER

PIN NAME

DESCRIPTION

TYPE

NUMBER

OF PINS

AVDD

Analog power supply

13, 15

AGND

Analog ground

6, 9, 12

CLKP, CLKM

Differential clock inputs

7, 8

INP, INM

Differential analog inputs

10, 11

Internal reference mode – common-mode voltage output.

VCM

External reference mode – reference input. The voltage forced on this pin sets the

I/O

internal references.

Serial interface RESET input.

When using serial interface mode, the user MUST initialize the internal registers

through a hardware RESET by applying a high-going pulse on this pin, or by using

RESET

the software reset option. See the SERIAL INTERFACE section.

In parallel interface mode, the user has to tie the RESET pin permanently HIGH.

(SCLK, SDATA, and SEN are used as parallel pin controls in this mode.)

The pin has an internal 100-k

Ω pull-down resistor.

This pin functions as the serial interface clock input when RESET is low.

When RESET is tied high, it controls coarse gain and internal/external reference

SCLK

selection. Tie SCLK low for internal reference and 0 dB gain and high for internal

reference and 3.5 dB gain. See Table 1.

The pin has an internal 100-k

Ω pull-down resistor.

This pin functions as the serial interface data input when RESET is low. It controls

various power down modes along with the PDN pin when RESET is tied high.

SDATA

See Table 3 for detailed information.

The pin has an internal 100-k

Ω pull-down resistor.

This pin functions as the serial interface enable input when RESET is low. When

RESET is high, it controls output interface type and data formats. See Table 2 for

SEN

detailed information.

The pin has an internal 100-k

Ω pull-up resistor to DRVDD.

PDN

Global power-down control pin

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