AD9735BBC datasheet(10/72 Pages) AD

10 / 72 page

AD9734/AD9735/AD9736

Rev. A | Page 10 of 72

PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS

DACCLK–

DACCLK+

DB0 (LSB)

DB11

DB12

DB13 (MSB)

Figure 2. AD9736 Digital LVDS Input, Clock I/O (Top View)

Table 6. AD9736 Pin Function Descriptions

Pin No.

Mnemonic

Description

A1, A2, A3, B1, B2, B3, C1, C2, C3, D2, D3

CVDD18

1.8 V Clock Supply.

A4, A5, A6, A9, A10, A11, B4, B5, B6, B9,

B10, B11, C4, C5, C6, C9, C10, C11, D4, D5,

D6, D9, D10, D11

AVSS

Analog Supply Ground.

A7, B7, C7, D7

IOUTB

DAC Negative Output. 10 mA to 30 mA full-scale output current.

A8, B8, C8, D8

IOUTA

DAC Positive Output. 10 mA to 30 mA full-scale output current.

A12, A13, B12, B13, C12, C13, D12, D13

AVDD33

3.3 V Analog Supply.

A14

DNC

Do Not Connect.

B14

I120

Nominal 1.2 V Reference. Tie to analog ground via 10 kΩ resistor to

generate a 120 μA reference current.

C14

VREF

Band Gap Voltage Reference I/O. Tie to analog ground via 1 nF

capacitor; output impedance is approximately 5 kΩ.

D1, E2, E3, E4, F2, F3, F4, G1, G2, G3, G4

CVSS

Clock Supply Ground.

D14

IPTAT

Factory Test Pin. Output current, proportional to absolute

temperature, is approximately 10 μA at 25°C with a slope of

approximately 20 nA/°C.

E1, F1

DACCLK−/DACCLK+

Negative/Positive DAC Clock Input (DACCLK).

E11, E12, F11, F12, G11, G12

AVSS

Analog Supply Ground Shield. Tie to AVSS at the DAC.

E13

IRQ/UNSIGNED

If PIN_MODE = 0, IRQ: Active low open-drain interrupt request

output, pull up to DVDD33 with 10 kΩ resistor.

If PIN_MODE = 1, UNSIGNED: Digital input pin where 0 = twos

complement input data format, 1 = unsigned.

E14

RESET/PD

If PIN_MODE = 0, RESET: 1 resets the AD9736.

If PIN_MODE = 1, PD: 1 puts the AD9736 in the power-down state.

F13

CSB/2×

See the Serial Peripheral Interface section and the Pin Mode

Operation section for pin description.

F14

SDIO/FIFO

See the Pin Mode Operation section for pin description.

G13

SCLK/FSC0

See the Pin Mode Operation section for pin description.

G14

SDO/FSC1

See the Pin Mode Operation section for pin description.

H1, H2, H3, H4, H11, H12, H13, H14, J1, J2,

J3, J4, J11, J12, J13, J14

DVDD18

1.8 V Digital Supply.

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